The Best Elasticsearch Developers For Hire In Poland

5.0/5
(15 jobs)

Highly Productive Problem Solver for Your Project! Few more informations about me: I'm a developer with more than 15 years of professional experience in web development. For over eight years, I have been offering my services as a Backend / Symfony developer on Upwork. My area of specialization encompasses a broad understanding of software development for the Web. During my career, I have developed numerous web applications, from contributing as a developer in nimble startups to leading development efforts in expansive worldwide portals. My technical expertise is extensive, encompassing PHP, Symfony / Laravel Framework, MySQL, and Databases (MongoDB, Redis). I'm proficient in node.js (socket.io, express), and JavaScript (Stencil JS, Ionic), and have built APIs using common architectures such as REST and GraphQL. Additionally, I bring to the table experience in managing AWS infrastructure and other servers based on the Linux Operating System specifically for hosting PHP / Symfony projects. My portfolio also includes building HTML mobile apps (Hybrid apps in frameworks like Ionic/Cordova). Particularly, my most recent projects have been centered around the Symfony framework, granting me continuous and profound expertise in the Symfony / PHP ecosystem. My grasp of software development techniques is solid, including writing clean and secure code, object-oriented development, and designing application architecture with a focus on extensibility and scalability. I have recent experience in building projects that integrate AI features through the OpenAI APIs. Beyond just development, I make it a point to grasp a thorough understanding of the entire project from the end user's perspective. My years of experience enable me to provide accurate insights and advice on enhancing your project. What excites me most is problem-solving. I thrive on unraveling complex, challenging issues, and the software industry continually nurtures my knowledge and creativity. I'm also a fan of machine learning, possessing experience in Octave and the R language, along with theoretical knowledge in machine learning techniques. Recently, I have gained experience in building apps with OpenAI, further broadening my skill set. I pride myself on being a 'one-man army' capable of delivering quick results in Full Stack Development. I'm on the lookout for new challenges. If you're interested in working with me, I'd be eager to discuss how I can contribute to your project. Looking forward to connecting with you. Paweł

Elasticsearch

Docker

PostgreSQL

MySQL

MongoDB

React

Apache Solr

Custom PHP

Page Speed Optimization

Symfony

DevOps

Performance Optimization

Stencil

Ionic Framework

PHP

4.8/5
(12 jobs)

♛ 𝐓𝐎𝐏-𝐑𝐀𝐓𝐄𝐃 🥇 100% Job Success Ratio ⚡AWS Certified Solution Architect - Professional ⚡AWS Certified DevOps Engineer - Professional ⚡HashiCorp Certified: Terraform Associate DevOps and DevSecOps engineer with a niche specialization in FinOps Engineering. I know how to build amazing cloud solutions while saving your money. Passion for new technologies and challenges drives my career and helps me push the boundaries of the projects I work on. "Mateusz is a terrific freelancer, anyone who works with him will quickly notice his attention to detail. This attention to detail is apparent throughout the entirety of the project workflow..." ✅ 15+ Years of Professional Experience ✅ Worked with small, agile startups and Fortune 100 companies ✅ Experienced DevOps Engineer and Cloud Architect ✅ A wealth of expertise implementing DevSecOps and FinOps methodologies ✅ Containers: Docker, Kubernetes, Nomad, OpenShift, ECS, EKS, Podman ✅ AWS - 12 years experience ✅ CICD: GitHub Actions, CircleCI, AWS CodePipelines, Jenkins, Azure DevOps ✅ Ability to implement DevOps strategies for companies of all size ✅ I break siloes, educate and collaborate to help companies move to another level

Elasticsearch

Solution Architecture

AWS CloudFormation

Continuous Integration

Linux System Administration

DevOps

MySQL

NoSQL Database

Kubernetes

Amazon ECS

Terraform

Docker

Amazon Web Services

5.0/5
(1 job)

Welcome to my profile! I’m a Web Development expert with 10+ years of experience in the field. Tech Leader and Developer on 15+ software projects: custom CRM systems, HIPAA-compliant healthcare software, high-load distributed systems with microservices, content management systems, integrated IoT systems, web portals, services, and APIs. Solid requirements analysis and elicitation - Offering at least a couple of project scope realization options - Visualization of the possible technical strategy in a format of an architecture scheme - Preparation of the Technical Vision Recently I’ve been involved in a bunch of IoT and architecture-aimed researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide: Technologies: - Frameworks: Django, Django REST framework (DRF), Flask, aiohttp - Databases: MySQL, MariaDB, PostgreSQL, Redis, Amazon DynamoDB - Web servers: Nginx, uWSGI, Werkzeug - Serverless: AWS Lambda - Deployment: Docker, Docker-Compose, Docker Swarm - Queue: celery - GUI: Kivy, PyGObject, Tkinter, wxPython - Data Analysis: NumPy, Pandas - Manipulating Video: moviepy, openCV, scikit-video - Web Crawling & Web Scraping: Scrapy - Tools: PyCharm, pip, virtualenv, venv - Chatbots & Virtual Assistants: Amazon Alexa Skills, Errbot, Viber, Telegram, Slack, Skype, Azure Bot Service, Facebook Messenger - Hardware: Raspberry Pi, Raspberry Pi Compute Module, ASIC, Nvidia Jetson, Arduino, Orange Pi, Banana Pi, Intel Movidius, custom hardware - IoT Cloud: IBM Watson IoT Platform, AWS IoT, Azure IoT, Google Cloud IoT, Serverless (Python, JavaScript), other services Domains: - Retail - Construction and Real Estate - Aviation, Tourism, Travel - Entertainment and Social networking - Marketing and Advertising - Fintech - Insurance - Industrial - HoReCa - Mental health and Healthcare - Management Project types: - ERP, CRM, POS - Complex web systems - Web application - Website - Standalone module, Framework, SDK - Proof of Concept I’m open to both tech consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss a web application or multi-component web platform concept, I am sure I will have valuable and interesting ideas to share with you!

Elasticsearch

Heroku

Redis

PostgreSQL Programming

Flask

PostgreSQL

Internet of Things Software

Web Scraping

MySQL

Google Cloud Platform

MongoDB

Data Scraping

Amazon Web Services

Web Development

Python

5.0/5
(2 jobs)

My commercial adventure with programming started in 2014. So far, I have worked for the medical, educational, financial, and hotel industries. I like to code in Ruby on Rails, but I'm not afraid to deal with other languages - I know Python, JavaScript as well as other js-like languages such as CoffeeScript. Right now, one of my professional plans for the near future is to master React. I am a part of the Polcode team, a Polish software development company established in 2006 with over 150 developers, designers, project managers, DevOps, and QA specialists onboard. This means that besides my programming skills you always have access to a full-stack product design & development team. My technology stack: - Backend: Ruby, Ruby on Rails, Python - Frontend: Javascript (ES5, ES6+, jQuery), HTML5, CSS3, Less, Bootstrap, Angular - Databases: MySQL, MongoDB, Postgresql - Ruby on Rails testing: RSpec - Others: Linux, Docker My approach: - team-player - creative - eager to learn - mentor of less experienced developers More about Polcode Polcode provides customized software solutions for startups, SaaS companies, eCommerce stores, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open source technologies and platforms to bring innovation in an agile fashion. Our team excels in PHP, Symfony, Laravel, Magento, Go, React Native, React.js, Vue.js, Ruby on Rails and Angular. With over 150 people, Polcode has either empowered client teams or delivered end-to-end development projects for brands from fintech, manufacturing, consulting, eCommerce, marketing or eLearning industries and is recognized as Top Developer in Poland by Clutch. Looking forward to our cooperation! Maciek, Polcode Dev Team

Elasticsearch

Docker

JavaScript

jQuery

Git

Python

Scrum

Jira

MongoDB

Ruby on Rails

Blockchain

4.9/5
(11 jobs)

Hello👋 Are you looking for experienced and certified Java engineers to boost your project? You are on the right page! Clear Solutions team provides Java engineers and grows their skills for you. We have more than 12 years of experience in IT and 8+ in Java. My team and I are happy to provide: 🚀 Java developers with transparent knowledge for transparent rates 🚀 People development services: technical assessments, mentoring, evaluation etc. Based on more than 500 interviews and technical assessments we made in the industry so far we created our own evaluation scale. Therefore you always know what set of knowledge you pay for each grade. Do you feel this is what you need? Let's schedule a quick call and find out how we could help you to grow ✅ I have an experience in the following: 👉 migration from on prem to AWS 👉 building microservce architecture from scratch 👉 delivering robust and high-quality code with unit tests 👉 building java high-load and distributed applications 👉 migration from monolith to microservices 👉 building the right engineering culture inside the company 👉 mentoring technical leaders Tech Stack: 🔹 Languages: Java 8, Java 16, Groovy. Spring boot, RESTful API, DB design, 🔸 Frameworks: Spring, Spring Boot, Hibernate, Spring Data 🔹 Clouds: AWS 🔸 SQL: PostgreSQL, MariaDB, Oracle 🔹 NoSQL: Elasticsearch, Redis, MongoDB, Cassandra, DynamoDB 🔸 Message brockers: Apache Kafka or RabbitMQ 🔹 Testing: Junit5, Testcontainers, Spock, RestAssured We have expertise in the following fields: ✅ FinTech, ✅ Trading, ✅ Cryptocurrency, ✅ Banking, ✅ Data processing, ✅ Healthcare, ✅ Social Networking and more. Do you feel this is what you need? Let's schedule a quick call and find out how we could help you to grow As a Backend Developer, I specialize in building robust Java Applications using Core Java, Spring Framework, and Spring Boot 3, leveraging tools like Maven, Gradle, and Bazel for efficient builds, and integrating Hibernate, JPA, and Apache POI for database and document handling. I have extensive experience with RESTful Architecture and SOAP for designing APIs, ensuring Application Security, and implementing testing frameworks like JUnit, JUnit5, Mochito, and AssertJ. I work across diverse environments, including Docker, AWS, Amazon Elastic Beanstalk, AWS Lambda, Google Cloud, and Azure (Azure Cosmos DB), utilizing databases like PostgreSQL, MySQL, MongoDB, Oracle Database, Microsoft SQL Server, IBM Db2, and RabbitMQ. On the frontend, I use HTML, CSS, JavaScript, TypeScript, Angular, AngularJS, and React, collaborating seamlessly using tools like Jira. For messaging and event-driven architecture, I rely on Apache Kafka, Apache ActiveMQ, and RabbitMQ, and for advanced testing, I employ Testcontainers. With a focus on Software Architecture & Design, I also develop Standalone Applications, Desktop Applications, and Web Services, ensuring scalable, secure solutions for enterprise systems and Microservices Architecture.

Elasticsearch

Amazon Web Services

MySQL

MongoDB

Spring Boot

Kubernetes

RabbitMQ

RESTful API

Docker

Hibernate

Spring Framework

Java

SQL

Apache Kafka

5.0/5
(8 jobs)

All-around problem solver. Passionate about software, products and people. Technological polyglot. Bringing momentum and focus to teams. Creating bridges between product and business teams. Maintaining the perfect balance between perfection and progress. Let me get involved with any aspects of your business and take it to the next level. I can lead your development team, create website or app from scratch or fix a few lines in CSS code of your layout. Get in touch and let's build something together!

Elasticsearch

Svelte

Phoenix Web Framework

Vue.js

PHP

Elixir

MySQL

JavaScript

PostgreSQL

5.0/5
(1 job)

✔️ I'm a Senior Software Engineer with 7+ years of expertise in .NET Core and ASP.NET Core. I have hands-on experience in implementing DevOps practices using Azure and AWS. ✔️ Master's degree focused in Information Technology from Belarus State University of Informatics and Radioelectronics. ✔️ I consider myself fluent at a B2 level. I am confident in leading discussions, actively participating in meetings, and clearly communicating ideas in English. I can easily work with technical documentation and task descriptions. ✔️ I really enjoy software development and coding. 🖥️ Back-end Frameworks: .NET, .NET Core (ASP.NET, ASP.NET Core, Web API, Microservices) DB: MS SQL Server, PostgreSQL, Elasticsearch Caching: IMemoryCache, Redis Queue Systems: RabbitMQ, AWS SQS, AWS SNS, Azure Service Bus Visualization and monitoring: Grafana, Kibana Testing: xUnit, nUnit Agile: Scrum, Kanban 🌐 Frontend JavaScript, CSS, HTML 🚀 DevOps Docker, Kubernetes, Azure DevOps, AWS

Elasticsearch

.NET Stack

.NET Core

Kibana

Microsoft Azure

DevOps

C#

SQL

Kubernetes

Docker

Microsoft SQL Server

Azure DevOps

ASP.NET Web API

PostgreSQL

ASP.NET Core

5.0/5
(4 jobs)

In IT for almost 8 years. Been doing networking, Linux, security. Nowadays mostly troubleshooting, automating bits and bobs, designing and implementing redundant, highly available architectures. I'm not afraid of a challenge!

Elasticsearch

MongoDB

Network Administration

Zabbix

VPN

Database

Linux

Ansible

Bash

Python

PfSense

Check Point

Firewall

DHCP

DNS

5.0/5
(28 jobs)

I started programming as a kid and it’s been more than 20 years now. My first language was Pascal, then C/C++ and then I moved on to interpreted languages, like PHP or Python. My professional career in web programming began back in 2011: since then I have delivered dozens of web applications in PHP (Symfony, Laravel) and Python (Django), among others. I treat my experience as a responsibility: I know what works and what doesn’t and I can judge the consequences of many technological choices - that’s why I am always honest and realistic with my clients, offer my advice, and if necessary, try to dissuade them from solutions that might not work as they have envisioned. My main focus is on code quality and practicality. My ambition is to write reliable, fast, easy-to-modify code that can be written in a relatively short time. I always seek a balance between perfection and practicality in my coding (since the road to perfection is infinite and time until the deadline is not). I am a strong proponent of code that can be documented only by its contents and unit tests. I am also a fast learner. I don’t treat any framework as anything more than another tool made for convenience. When the need arises, I can learn most programming libraries and frameworks on the spot (as long as it's in a programming language I know). I always enjoy a new challenge! My technical expertise covers: - Databases: PostgreSQL, MySQL, SQLite, Oracle, MongoDB - VCS: Git, SVN, Mercurial - Issue trackers: Jira, Asana, Redmine, Trello, Harvest - Hosting: AWS, Linode, CPANEL/WHM, GoDaddy, Github Pages - Server OSes and tools: GNU/Linux (experience with most of popular distributions), Kubernetes (minikube, EKS), AWS Lambda, Apache2, Nginx (php-fpm and uwsgi), Ansible - Code quality: PHPUnit, Python unittest (also in conjunction with Django), pytest - Search: ElasticSearch, Solr - REST API development: experience in Django (REST Framework), FastAPI, Symfony, Laravel, and Node.js - 3D graphics programming: OpenGL in JS WebGL, C/C++ OpenGL libraries and PyOpenGL+pygame in Python - Others: Websockets (experience with implementation in Django, FastApi, Python in Lambda, Laravel and Ratchet). - Payment gateway integration: Paypal, Stripe, Braintree, Przelewy24 My technology stack: Backend: - PHP: Laravel, Symfony - Python: Django, FastApi - JS: Node.js Frontend: HTML, JavaScript, TypeScript, React, Angular.io and Angular.js, Vue.js, jQuery, Three.js, CSS, SASS, LESS, Tailwind, Bootstrap, AdminLTE Mobile technologies: React Native If you are looking for a reliable business partner, I have good news for you: I work with Polcode Software House - one of the top rated agencies on Upwork, located in Poland (EU). We have achieved an impressive 98% Job Success rate (with over 700,000 hours logged!). We are a team of about 150 people (developers, account managers, project managers, and graphic designers) whose daily job is problem-solving. We never leave a customer with an unfinished project: working in a team we can guarantee the project's continuity, no matter what happens. We are here to help you have your work done and finished. Please visit Polcode's portfolio and check our feedback! Looking forward to our cooperation! Best regards, Maciej Zakrzewski Senior Full Stack Python Developer Polcode Dev Team

Elasticsearch

Apache Solr

WebGL

React

Postman

Minio

Angular 4

JavaScript

React Native

Celery

PostgreSQL

Python

Django

PHP

TypeScript

Ansible

Laravel

5.0/5
(16 jobs)

I am a Senior Software Engineer with over 9 years of experience in .NET. Below you can find the projects list on which I was working: 9. Complex WEB API project for fetching surveys + some frontend work(WEB API, MS SQL, Identity Server, Azure Functions) [Senior Developer] 8. Implementation of MVC Net Webhooks Listener for CLIO API(ASP.NET MVC, MS SQL, REST API integration, OAuth 2.0) [Senior Developer] 7. Big microservice architecture system for automating processes(.Net Core MVC, MS SQL, microservice communication(gRPC), OPC UA communication, MQTT communication, TCP communication, Web API) [Senior Developer] 6. Dashboard system which displays data from the database in charts and diagrams(.Net Core 2.2, MediatR, CQRS, MS SQL, Angular 8, MS SQL) [MID-level Developer] 5. The process automation system, which has been integrated with more than 8 external systems(ASP.NET MVC + ANGULAR + MS SQL, API(SOAP, Rest)) [MID-level Developer] 4. A big CRM project (ASP.Net MVC, AngularJS, MS SQL) [MID-level Developer] 3. A big microservice architecture project - I was responsible for implementing entire microservice logic and communication + some frontend work(.Net Core, ReactJS, MongoDB) 0,5 year (I was responsible for the own microservice, preparing integration tests(e2e), and preparing the unit tests for functionality) [MID-level Developer] 2. A small CRM system (.NET Core, JQuery, HTML, CSS, Bootstrap, Web API, MS SQL, Azure) - 0,5 years (from start until end) [MID-level Developer] 1. B2B platform for online booking hotels(ASP.NET MVC, Web API, WCF, REST API preparing, REST(SOAP) API integration, Entity Framework, MS SQL, MySql, ElasticSearch, Redis, CI/CD, Jira, Octopus, TeamCity) I worked for more than 3 years on this project (I was responsible for integrating with external APIs, fixing bugs, implementing new features, and unit testing. Since the project's beginning, I have integrated with more than 20 APIs. Configured CI/CD and automatic deployment with 0 downtimes) [Junior Developer]

Elasticsearch

ASP.NET Web API

MQTT

Unit Testing

TCP/IP

Microsoft Azure

.NET Core

Data Serialization Framework

API Development

API Integration

C#

SQL

Entity Framework

ASP.NET MVC

ASP.NET Core

5.0/5
(116 jobs)

Greetings 👋 I'm a Java/Cloud architect, and lead engineer for 👨‍💻Special Software Reliability Technology (EDC) with over 18 years of experience in the area. I focus on reliable software, and mission-critical operations, for which I am utilizing custom-developed EDC technology for software reliability, to prevent system failures and crashes. I can help you with: • Cloud applications, scalable systems, • AI and LLM integration and development, • API design, development and integration, • High load/data volumes, predictive analytics, • Software for robots and machinery, • Internet of Things (IoT), • Reliable, safety-critical systems. I EARN/SAVE MONEY💰 FOR OUR CUSTOMERS by: • allowing their business to expand (or start sometimes:) • automating processes and reducing operational cost • using newer and more efficient technology • long-run cost reduction because of high-quality software. Don't take my word for it, please review my profile feedback. Some techs below... ✅ Cloud applications Cloud, serverless, scalable applications, architecture and development for Amazon Web Services (AWS) and Google Cloud Platform (GCP). ✅ AI development and integration Embed AI-powered tools to your business and software: AI analytics, predictive maintenance, LLM, chatbots, ChatGPT integration, AI over your data helping your clients. ✅ Complex system development, API integration and development Develop custom software from A to Z, build sophisticated APIs, integrate third-party APIs, data hubs and gateways. ✅ Big data volumes processing, storage, and analytics Receive, process, store and analyze and send huge volumes of data. Cost-efficient data-focused systems on the cloud. ✅ Internet of things (IoT) Connect and manage thousands of simple and complex devices on the cloud, custom automation, reports and analytics. ✅ Other Workflow automation, Performance optimization, QA automation. Some tech details: ✓ Java: Java 8 and further versions, Spring, JavaEE, JavaFX ✓ Spring: SpringBoot, Spring MVC, Spring Security, Spring Data, ... ✓ Cloud: AWS, Google Cloud, Docker, Kubernetes, ECS, EKS, Cloud-native apps, scalable clusters, zero-downtime deployment. ✓ AI: ChatGPT, LLM, Vertex AI, Chatbots. ✓ Databases: Oracle/PostgreSQL/MySQL, big volume storage (AWS Redshift, AWS Athena/S3, Aurora, Cassandra, HDFS), Redis, MongoDB, Neo4j. ✓ Web: Bootstrap, Angular, React, JavaScript, OAuth, Tomcat, JBoss. ✓ APIs: REST, SOAP, XML-RPC, WebServices, WebSockets, Swagger/OpenAPI 3 etc. ✓ AWS: Clusters, AWS EC2, AWS Kinesis, AWS Athena, AWS Redshift, AWS DynamoDB, AWS Lambda, AWS IoT, AWS SQS/SNS, AWS CloudFront/Route53/ApiGateway, vast AWS API usage, and automation. ✓ Data streaming: AWS Kinesis, Firehose, SQS/SNS, Kafka, Camel, RabbitMQ. ✓ Performance optimization: JMeter, JProfiler, AWS X-Ray, GTMetrix, Gatling. ✓ Version control: Git, Github, Bitbucket, GitLab, SVN. ✓ CI/CD: Bamboo, Jenkins, Circle CI, Sonar, Bitbucket pipelines, AWS CodeBuild/CodeDeploy. ✓ Other: Maven, Nexus, Gradle, Ant. I get things done.

Elasticsearch

Large Language Model

Artificial Intelligence

Spring Boot

MySQL

PostgreSQL

Amazon EC2

Docker

API

SaaS

Internet of Things Solutions Design

Cloud Architecture

Amazon Web Services

Spring Framework

Java

4.9/5
(19 jobs)

I have experience in web development since 2002. I graduated from university - Warsaw School of Computer Science. I have worked as a freelancer for small companies and also for large such as Grey Group, Netia, Onet. I am using PHP as my primary programming language including frameworks e.q. Symfony and Laravel. I have very good skills in HTML5, CSS3, JS, MySQL. I have passion for web developing and I always try to be up-to-date with the latest techonologies and changes that comes to the web. I'm also familiar with developing Wordpress sites. I'm writing plugins and themes for Wordpress as well. E-commerce platforms which I developed Woocommerce, Shopify or Prestashop. I'm also familar with Google Tag Manager or Google Analytics implementations.

Elasticsearch

Google Tag Manager

TypeScript

Shopify Development

Shopify

Laravel

Vue.js

MySQL Programming

Symfony

Bootstrap

jQuery

React

HTML5

PHP

WordPress

5.0/5
(25 jobs)

Hello! I’m a Senior PHP Developer with over 25 years of hands-on experience in building solid web applications that stand the test of time. My journey has taken me through all the ins and outs of PHP, where I've honed my skills in frameworks like Symfony, Yii, and Zend. In the world of full-stack development, I’m your go-to guy for everything from sprucing up the front-end with HTML5, CSS3, and a dash of JavaScript, to mastering the complexities of back-end systems with MySQL, PostgreSQL, and MongoDB. I enjoy piecing together all parts of the tech puzzle to ensure everything runs smoothly from start to finish. While I have a knack for leading teams and guiding projects to success, I’m also totally at home diving into code as a hands-on developer. Got a tough "mission impossible" with a tight deadline? Bring it on—I thrive under pressure and love turning tight spots into triumphs. I’m always on the ball with the latest tech trends, ready to bring innovative solutions and optimizations to the table. Need a scalable app, seamless system integrations, or just some wizardry to get out of a tech jam? Let’s chat—I’m here to help your business hit its tech targets with ease and expertise.

Elasticsearch

Microsoft SQL Server Programming

PHPUnit

Jira

Leadership Skills

Yii2

API Integration

Google Cloud Platform

Microsoft SQL Server

Git

JavaScript

HTML5

PostgreSQL

MySQL

Symfony

PHP

5.0/5
(4 jobs)

Ruby on Rails Architect with 10+ years of expertise in building and scaling web applications for Marketplaces, CRM systems, and Fintech. Sold my first desktop app at 13. Integrated ML model that helped to save $30K monthly. One of the first Amazon Elastic Kubernetes Service users Master of Science in Engineering Tech skills: • Full cycle of application development from scratch for monolithic & microservices architecture. Ruby, Ruby on Rails, Python, Django, Flask • Database design and optimization - PostgreSQL, MySQL, SQLite. Redis • Search engines - Solr, ElasticSearch, Sphinx • Frontend solutions - Javascript, jQuery, Bootstrap, Stimulus, VueJS, ReactJS • Deployment, provisioning, and containerization - Capistrano, Ansible, Heroku, Docker, Kubernetes • Application tests coverage and CI/CD configuration - BuildKite, Jenkins, CircleCI, GitHub Actions • Background processing - Resque, Sidekiq, Whenever, Delayed Job, Sneakers, etc • Push notifications - Firebase • Message queues - RabbitMQ, AWS SQS • General and high-load application optimization • Coud infrastructure: Amazon Web Services: ELB, EC2, RDS, SQS, ECR, ECS, EKS, Cloudfront, Cloudwatch Heroku & addons, VPS instances • Ruby on Rails cybersecurity monitoring • Building public & private APIs - RestAPI & GraphQL • API Integrations: AI: GhatGPT, Image recognition, Image scoring Payments & subscription: Stripe, PayPal, ChargeBee, Chargify Social networks: Facebook, Instagram, Twitter, Google, Telegram Media: Cloudinary, AWS S3, Youtube, Dropbox, Google Drive Marketing: Mailchimp, FB pixel, Hubspot, Google Ads, GTM, Firebase, Twilio, SendGrid, Keitaro, Amplitude, Mailgun, GTM Messengers & bots: Slack, Telegram KYC: KycMatic, Onfido, SumSub Geolocation: PostGIS, OpenStreetMap, Google Maps, Geocoder Other: Datadog, Sentry, NewRelic, Rollbar, Grafana, PaperTrail, Recaptha, Spotify, Apple, Turnstile • Project Management: Agile, Scrum, Market Research, Technical Documentation, Data Analysis and Interpretation, Marketing & Sales, Atlassian Jira, Confluence, Trello, Todoist, Clickup

Elasticsearch

Ecommerce Backup & Migration

Payment Gateway Integration

App Development

Ecommerce Development Consultation

Ecommerce Website

MySQL

Stripe

Apache Solr

PostgreSQL

PayPal

Sphinx

Ruby on Rails

Amazon Web Services

API Development

5.0/5
(14 jobs)

Welcome to my profile! With over 9 years of experience as a PHP developer, I am passionate about creating efficient, scalable, and secure web applications. Throughout my career, I have worked with a range of frameworks and CMS platforms, including Laravel, Symfony, Spryker, and WordPress. My expertise lies in developing custom web applications, implementing complex functionalities, and optimizing performance. I have a deep understanding of Laravel and Symfony, two widely-used PHP frameworks known for their robustness and flexibility. I have leveraged these frameworks to build tailored solutions for clients across various industries. In addition to Laravel and Symfony, I have extensive experience with Spryker, a powerful e-commerce framework. I have successfully developed and customized e-commerce solutions using Spryker, delivering seamless online shopping experiences for businesses and their customers. Furthermore, I have worked with WordPress, a popular content management system, to create engaging websites and blogs. I am proficient in developing custom themes, and plugins, and optimizing WordPress websites for improved performance and user experience. My skill set includes: - PHP (Spryker, Laravel, Symfony, Wordpress) - Doctrine, Propel, Eloquent - MySQL, PostgreSQL - Redis, Memcached ElasticSearch - RabbitMQ, Google queues - Github, Gitlab, Bitbucket - AWS / Unix / Console - Restful API Throughout my career, I have successfully delivered projects for clients in various industries, meeting their unique requirements and exceeding their expectations. I take pride in my ability to translate complex concepts into user-friendly solutions and my commitment to delivering high-quality work. If you are looking for a skilled PHP developer with expertise in Laravel, Symfony, Spryker, and WordPress, I am confident in my ability to contribute to the success of your project. Let's discuss how I can bring your ideas to life and achieve your desired outcomes.

Elasticsearch

Redis

PostgreSQL

PHP

Docker

Vagrant

Laravel

Symfony

Memcached

RabbitMQ

MySQL

5.0/5
(2 jobs)

Fullstack JavaScript Developer | React, Node.js (NestJS, Express) | Typescript | MongoDB, PostgreSQL, Redis | RabbitMQ | 8+ Years of Experience I’m a fullstack JavaScript developer with 8+ years of experience building modern, scalable, and maintainable web applications. I specialize in React, TypeScript, Node.js — and I’ve worked with a wide range of SaaS startups across various industries. Whether it’s frontend, backend, or anything in between, I can jump in and deliver exactly what your project needs. I’m highly detail-oriented and take pride in writing clean, efficient, and reliable code that supports long-term growth and smooth user experiences. What I offer: • Fullstack development using React, TypeScript, Node.js, and NestJS • Fast onboarding and adaptability to any project structure or team workflow • Strong communication and reliability — I deliver on time and ask the right questions • A developer who can independently take features from idea to production

Elasticsearch

RabbitMQ

NestJS

PostGIS

MeteorJS

Redis

PostgreSQL

Node.js

GraphQL

MongoDB

React

TypeScript

JavaScript

5.0/5
(33 jobs)

🥇Expert-vetted (top 1%) Upwork freelancer. 💡Top AI voice in LI. 👔 10+ years of experience on executive tech positions. ⭐️⭐️⭐️⭐️⭐️ "Ivan seamlessly navigated the complexities of the non-deterministic nature of OpenAI/LLMs. Highly recommend! Ivan - Exceptional work on our POC. Thank you." ⭐️⭐️⭐️⭐️⭐️ "Amazing to work with. Went above and beyond expectations." ⭐️⭐️⭐️⭐️⭐️ "Ivan understands AI and LLMs really well, he’s a great communicator and transparent about his methods and efforts." ----------------------- Hello! I'm all about technology and the magic it brings to our lives. . There's something truly special about building things from scratch and watching them take off. With a solid foundation in tech, I have a particular interest in the final product — its user experience, design, and the customer's journey. Collaborating with product and business teams is something I thoroughly enjoy, as it brings together different perspectives for a common goal. My area of expertise lies in Artificial Intelligence, Machine Learning, and Natural Language Processing. Here are some of the services I commonly offer: - Strategic AI audits and guidance - Elevating existing products with AI enhancements - Designing and developing new AI-centric solutions - PoC/MVP for AI projects I've had the privilege of working with over 50 companies, including notable names like UBS, Yahoo, STC, and Hitachi. This experience has allowed me to contribute significantly to the growth and transformation of various products. Interested in exploring how AI can revolutionize your product? I'd love to chat about your vision and how we can bring it to life. Feel free to reach out, and let's start a conversation about your next big step in innovation. ----------------------- Some of my AI and ML skills include: ✅ Data Science and Machine Learning expertise including Deep Learning, Natural Language Processing, and Computer Vision using TensorFlow, PyTorch, Keras, scikit-learn, Numba, etc. ✅ API Development and Integration, including external API integration like OpenAI API. ✅ Expertise in Reinforcement Learning and its applications in complex environments using libraries like OpenAI Gym, Stable Baselines, and RLlib. ✅ Advanced skills in data preprocessing, feature engineering, and dimensionality reduction techniques for machine learning models. ✅ Proficiency in time-series analysis and forecasting using ARIMA, LSTM, and Prophet for predicting future trends. ✅ Development of chatbots and virtual assistants using platforms like Dialogflow, Rasa, and Microsoft Bot Framework. ✅ Experience with Generative Adversarial Networks (GANs) for creative applications such as art generation, style transfer, and data augmentation. ✅ Implementation of recommendation systems using collaborative filtering, content-based, and hybrid approaches. ✅ Proficient in big data analytics using Apache Spark, Hadoop, and related ecosystems for handling large-scale data processing. ✅ Knowledge of edge computing and deploying AI models on edge devices using TensorFlow Lite, PyTorch Mobile, and ONNX. ✅ Expertise in computer vision tasks like object detection, image segmentation, and facial recognition using OpenCV and Dlib. ✅ Strong background in mathematics and statistics, essential for algorithm development and model optimization. ✅ Experience with cloud platforms like AWS, Google Cloud, and Azure for deploying and scaling machine learning models. ✅ Capable of conducting AI-driven research and development, staying at the forefront of emerging technologies and methodologies. ✅ Ability to communicate complex AI/ML concepts to non-technical stakeholders and collaborate effectively with interdisciplinary teams. P.S. Curious about the future of AI in your industry? Drop me a message, and I'll share my insights and predictions!

Elasticsearch

RESTful Architecture

RESTful API

NGINX

Web Application

Database Architecture

API Integration

Hibernate

Spring Framework

Java

Docker

Microservice

Apache Kafka

Kubernetes

Architectural Design

5.0/5
(5 jobs)

I have been a professional full-stack developer since 2013. During this time, I have architected and coded complex software systems, including CMS systems, Data Ingestion Modules, and Data Visualization portals. I stay up to date on the latest practices in frontend responsiveness and performance optimization. I have experience with various technologies such as Python, Django, and ReactJS, which have proven to be critical complementary tools to my main skill set. Apart from high-quality code, what matters to me personally is keeping an open mind and implementing a creative approach to assigned tasks. Whenever it is called for, I roll up my sleeves and attempt to square the circle. My can-do attitude and eagerness to constantly develop, help me to dream big and achieve my goals. I work well in teams and autonomously and place a great emphasis on skillful communication. On top of this, I easily adapt to my Customers’ business goals to support them on their path to success! My technology stack: Backend: Django, Django REST Framework, Python, Go, Node.js, Express Frontend: React.js, Typescript, Tailwind, NextJS, Vue.js, Vuex.js Databases: PostgreSQL Other: Docker, Pytest, Google API, ElasticSearch My technical expertise covers also: Code quality: Acceptance Tests, Unit testing with PHPUnit, PSR Standards, Design Patterns Version Control System: Git (Github, GitLab, Bitbucket) Issue Trackers: JIRA, Redmine, Trello My recent projects: impak Ratings - In this project, I served as a full-stack developer with a primary focus on Python. I was responsible for retrieving, processing, validating, and saving data from Google spreadsheets to the database, ensuring the data's integrity and consistency across the spreadsheets, backend, and frontend. I worked on performance optimization, displaying data in another service created in React, and generating PDF reports from the application's views. Additionally, I developed a Google Spreadsheet plugin using Apps Script to check spelling directly within the spreadsheet. Technologies used: Python, Django, Django REST Framework, Golang (Echo framework), Mongodb, Node.js, TypeScript, React.js, Redux/RTP Query, Express.js, Puppeteer.js, ElasticSearch, Redis, Tailwind CSS, Survicate app - I was a member of a JavaScript development team that was responsible for creating one of most advanced app for collecting user feedback on multiple platforms (Web, Mobile, Email). The team delivered a thoroughly-tested and very secure platform that gained trust of hundreds companies from all over the world. My main duties concerned assistance with upgrading analytics bars and integrations panels. Technologies used: HTML, CSS, JavaScript, AngularJs, Vue.js, Vuex, Mocha.js, Vue Test Utils iParts e-commerce - a long-term project that aimed at finetuning and optimizing one of the largest online stores in Poland, with thousands products on stock and related specialized car parts sites. I worked in a 10-person dev team that closely cooperated with marketing specialists. I served the role of full stack developer, and I was tasked with helping to maintain and add advanced UX web components such as: - AJAX system allowing for adding items to the basket - Notification system, when too many items were added to the basket - Front page car find bar, with AJAX request and save car option for easier part selection in the future - Multi-option advanced tyre filter page, with selected filter bar display and caching system Technologies used: PHP, Lumen, HTML 5, CSS3, JavaScript, jQuery, Vue.js, Vuex.js, Node,js, Webpack, MySQL, PostreSQL, PHPUnit, TestCafe, ElasticSearch, Redis I work with Polcode Software House - one of the top-rated agencies on Upwork, located in Poland (EU). We have achieved an impressive 99 % Job Success rate with over 1 mln hours logged. We are a team of about 150 people (developers, delivery managers, project managers, and graphic designers) whose daily job is problem-solving. We never leave a customer with an unfinished project - working in a team we can guarantee the project's full continuity, no matter the circumstances. We are here to help you have your work done and finished. Looking forward to our cooperation! Best regards, Andrzej

Elasticsearch

Web Development

PostgreSQL Programming

Agile Project Management

Lumen Micro Framework

English

Web Application

Agile Software Development

Docker

ExpressJS

Data Visualization

Google APIs

Node.js

React

Django

Golang

PostgreSQL

TypeScript

Python

5.0/5
(5 jobs)

Experienced Java Developer with 5+ years in backend development. Proficient in Java, Spring, Quarkus, and cloud technologies. Strong expertise in microservices, databases, and DevOps tools. Adept at designing scalable architectures and optimizing application performance. Passionate about writing clean, maintainable code and mentoring junior developers.

Elasticsearch

GraphQL

PostgreSQL

MySQL

Gradle

Spring Boot

CI/CD

Hibernate

Apache Kafka

Docker

API

RESTful API

RabbitMQ

Object-Oriented Programming

Web Development

5.0/5
(2 jobs)

Software engineer with 5 years of active experience oriented to Back-End development. I've been working with small to big enterprise clients across the world in domains as cargo, insurance, retail, hotels, clinics etc. ⭐Here's what I can bring to your project⭐ ✅Strong base if it is a new project and clean extendable solutions to existing ones. ✅Reliable communication and awareness of the status of the work. ✅Agility, the trendy word :) Always ready to adapt to changing conditions and requirements. ✅Shining quality over quantity. ⭐Why you should choose me⭐ ✅Client trust: The type of person who is easy going and honest, so you will find me who you can TRUST. ✅Responsiveness: All the lines of the communication is open and available to be in touch. ✅Questioning: I might ask many questions in the beginning but will do my best to not bother you with minor clarification calls. ✅Here is a working project, hope you will not find that it is about to fall apart and accept it so I can peacefully disappear. This is a NOT my story :) Most experienced in: ✔️ .NET Core/Framework ✔️ Microsoft SQL ✔️ PostgreSQL ✔️ Windows applications (WinForms, WPF) ✔️ Elastic search ✔️ Azure services Also have an experience to manage a small team and deliver a useful product. Looking forward, Victor.

Elasticsearch

Amazon Web Services

ASP.NET

Project Management

Microservice

ASP.NET Web API

Software Development

Transact-SQL

Microsoft Azure

.NET Core

C#

PostgreSQL

Desktop Application

0.0/5
(0 jobs)

I am a dedicated Magento developer with a keen interest in producing well-formatted, readable, and maintainable code for dynamic, eﬀective websites. With 26 years of programming passion and 11 years of professional experience, I combine my expertise in Magento with a strong understanding of eCommerce to create and deliver high-value digital products. My journey began with an interest in C++ and JAVA during my Physics studies, leading to my ﬁrst role as a JAVA programmer in 2007. I later transitioned to web design, working with PHP, JavaScript, CSS, and HTML. Since 2016, I have specialized in Magento development and plan to continue focusing on this technology. I thrive in both independent and team settings, easily adapting to new challenges. My strengths lie in backend development and my extensive eCommerce experience. I emphasize clean code and am dedicated to delivering projects on time. Outside of work, I enjoy reading Bible everyday and solving puzzles, especially multi-dimensional logic Rubik's cubes.

Elasticsearch

CI/CD

Docker

PHP

HTML5

LeSS Framework

CSS Grid

CSS 3

Redis

MySQL

JavaScript

jQuery UI

jQuery

Knockout.js

Magento 2

0.0/5
(0 jobs)

I am software engineer specialised with backedn technologies. Working for large data-oriented company. Knowing data processing, backend development and DevOps tools.

Elasticsearch

Apache Spark

Python

Scala

Apache Kafka

Spring Data

Spring Boot

Spring MVC

Java

0.0/5
(0 jobs)

I work as a software developer for over 30 years. I have rich experience in development of backend systems with databases, big data, microservices and clouds. I am using functional programming and object oriented languages Scala and Java. I am focused on correctness, performance, scalability, flexibility, configurability and maintainability of resulted working systems and solutions. I am following principles of testing driven, continuous delivery, versioning, observability, clean code, reactive event streams, domain modeling, safety declarative guaranties proofs, static types, contract interfaces, layers and modules in software development. I also have some experience with programming languages Haskell and Go. I actively research in practical usage of advanced concepts in software development such as applied category theory, effects handlers, metaprogramming and embedded custom domain specific languages.

Elasticsearch

RxJava

Functional Programming

Haskell

AWS Development

AWS Lambda

Golang

MongoDB

Couchbase Server

Apache Kafka

SQL

Apache Spark

Java

Scalaz

Scala

0.0/5
(0 jobs)

I’m a Senior .NET Developer and Azure Consultant with over 20 years of experience building scalable backend systems, cloud-native applications, and enterprise platforms. I specialize in: ASP.NET Core and C# development Microservices and RESTful APIs Microsoft Azure (Functions, Service Bus, App Services, Cosmos DB) Docker-based deployments and DevOps pipelines SQL Server, Redis, and other databases I’ve successfully delivered projects for clients across Europe and the US, including governance/risk (GRC) systems, internal business tools, and real-time data processing platforms. I’m comfortable working independently or as part of a team and always focus on clean architecture, reliability, and performance. I’m available for freelance or contract work and open to long-term collaboration. Let’s build something great together! of domains, including GRC systems, internal enterprise tools, and distributed microservices.Strong background in remote and freelance collaboration with international clients, as well as long-term enterprise engagements.Proficient across the entire software development lifecycle-from architecture and prototyping to implementation, testing, and maintenance.

Elasticsearch

Entity Framework

OAuth

Performance Optimization

Code Refactoring

API Integration

Software Architecture

Cloud Computing

Redis

Microsoft SQL Server

Docker

Angular

C#

Microsoft Azure

.NET Core

0.0/5
(0 jobs)

ABOUT ME Customer Service & Technical Support Specialist | Bilingual (Spanish & English) | Process Improvement & Integration Expert I am a dedicated Customer Service and Technical Support professional with a strong background in both client relations and technical integrations. Fluent in Spanish (MX & ES markets), Polish and English, I excel at creating comprehensive user guides, webinars, and delivering training courses to empower customers to maximize system usage. With experience in responding to customer inquiries via email and phone, analyzing data to generate accurate reports, and configuring online booking platforms, I am adept at streamlining customer experiences. My technical support background includes troubleshooting internet and TV services, remote device configurations, and technical requests handling. In addition to customer service, I possess extensive expertise in system integrations and process management, having managed carrier onboarding, data flow monitoring, and customized API integrations with platforms like EDI, XML, CSV, and pull connections. My skills include business process analysis, technical documentation, and collaboration with development teams to optimize workflows. Organized, driven, and committed to delivering optimal solutions. My technical proficiency with APIs (OAuth2, Rest API), and data analysis platforms (Elasticsearch, Snowflake) make me a versatile professional capable of bridging customer needs with technical solutions. Let’s connect if you're looking for a proactive, solution-oriented specialist with a passion for improving customer experience and streamlining processes!

Elasticsearch

Business Analysis

XML

Business Process Model & Notation

Business

Process Engineering

Postman

REST API

API

Phone Communication

Technical Support

Customer Service

4.6/5
(21 jobs)

Short story: Seasoned expert in the fields of software architecture. Passionate about Big Data, scalable, responsible, reactive and fault tolerance systems. Long story: - highly experienced in enterprise/web-scale software design and enterprise application integration; - experienced in Big Data: traditional data-warehousing and cutting-edge noSQL/noETL; - experienced micro-service system design; - proficient in distributed and concurrent programming; - advanced in Scala / Typesafe Stack; - advanced in Golang; - advanced in core Java / countless mainstream frameworks;

Elasticsearch

ELK Stack

Prometheus

Kubernetes

Golang

Apache Cassandra

PostgreSQL Programming

MongoDB

0.0/5
(0 jobs)

Hey there! My name's Andrey. I'm web developer with more than 9 years of experience in software development REST API services based on a Symfony framework, I also have a limited experience with javascript and reactjs I also have: - good object-oriented programming (OOP) skills and design patterns. - strong knowledge of PHP (5.6, 7+), PSR standards and best practices. - relational database design, optimization skills, firm SQL knowledge. - strong knowledge of MySQL and Redis. - experience with REST API, using PHPUnit as a testing framework, docker and CI/CD. - experience with setup and add improvements for apache/nginx web servers. - agile experience: Scrum/Kanban

Elasticsearch

Laminas

AngularJS

PHPUnit

RabbitMQ

Redis

Docker

Doctrine ORM

Symfony

HTML

MySQL

CSS

PHP

JavaScript

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