Name: Java developers
Brand: Upwork
Rating: 4.7 (9237 reviews)

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4.7/5

based on 9,237 client reviews

$50 hourly
- 4.9/5
- (21 jobs)
I am a Splunk Certified Architect. I have experience in capacity planning, deploying, configuring, and managing Splunk Env. And I have a proven record of providing 99.9% SLA of Splunk Env. And good at troubleshooting issues of Splunk Env, Universal Forwarders, etc. And as I am also a Splunk Certified Developer. I have good hands-on on creating complex Splunk dashboards using HTML, XML, Tokens, custom Javascript to make Splunk Dashboard more dynamic. And creating and optimization of Splunk Queries. Also, I have developed various Splunk Add-on and Apps and some of them are also published on SplunkBase. Apart from Splunk, I have a good understanding and grip on AWS and its various services, Jenkins, Git, Python, Shell Script, Automation, Ansible.

Java
Windows Server
Splunk
AWS CloudFormation
Kibana
Logstash
AWS CodeDeploy
JavaScript
Elasticsearch
Python
Linux
Jenkins
Ansible
Amazon ECS
$36 hourly
- 5.0/5
- (4 jobs)
I'm Gopal, an 𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝 and 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 Java Specialist deeply passionate about creating production-ready RESTful microservices using Spring Boot. My expertise extends to developing intricate web applications with Java, Spring Boot, cloud technologies, PostgreSQL, CI/CD pipelines, and other advanced tools. Over my 7+ years in the field, I’ve consistently delivered high-performance solutions for top-tier companies and innovative startups.🚀🌟 👜 𝐏𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝐒𝐮𝐦𝐦𝐚𝐫𝐲: 📖 Drawing from my involvement in over 20 projects, I offer specialized skills in designing, building, and deploying resilient full-stack solutions. ⚙️My expertise extends beyond technical proficiency—I excel in navigating various Software Development Lifecycles (including Agile, Spiral, and Waterfall), implementing design patterns, conducting thorough code reviews, and 🤝 promoting collaborative teamwork 🚀 𝐊𝐞𝐲 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬/𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: ✔ Microservices Architecture ✔ Java 8, 17, 21 ✔ Spring Boot, Spring Cloud, Spring Webflux, Spring Security ✔ JPA, Hibernate ✔ Kubernates ✔ PostgreSQL, MySQL, MongoDB ✔ React, Node, Express ✔ Elasticsearch ✔ Maven, Gradle ✔ WebSocket ✔ Docker ✔ Git, Jira, Bitbucket ✔ Sentry ✔ JUnit, Mockito, Wiremock ✔ JWT, OAuth2 ✔ CI/CD: Github Actions, GitLab CI ✔ Swagger ✔ AWS, GCP, Azure, Digitalocean ✔ Github CoPilot ✔ Expert in Data structures and Algorithms ✔ AWS, Azure, Google Cloud & DigitalOcean cloud services 🚀 𝐎𝐭𝐡𝐞𝐫 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✔ RPA (Robotic Processing Automation) ✔ Selenium ✔ Process analysis and feasibility check ✔ Chrome Debugger tool ✔ Website reverse engineering ✔ Workflow automation using RPA 👨‍💻 𝐖𝐡𝐲 𝐜𝐡𝐨𝐨𝐬𝐞 𝐦𝐞? I prioritize delivering high-quality work, ensuring customer satisfaction, and meeting deadlines without compromising on the quality of work. My strong analytical and problem-solving skills enable me to maintain effective communication with clients, providing regular updates and fostering a collaborative and transparent work environment. My prime goal is to work on long term opportunities so that I can bring maximum values to my clients.

Java
Node.js
React
Kubernetes
Amazon Web Services
Spring Framework
RESTful API
Docker
MySQL
MongoDB
NGINX
Hibernate
PostgreSQL
Apache Kafka
Spring Boot
$40 hourly
- 5.0/5
- (11 jobs)
Welcome, I am JANA, an experienced Node.js Developer, MongoDB Administrator, Fullstack Developer and an Open Source Contributor. Currently, developing Authorization Server for OAuth 2.1 Authorization Code Flow in MEVN stack (MongoDB-Express.js-Vanilla JS-Node.js). In future, looking to implementing other OAuth 2.1 flows as well: -- Client Credential Flow and -- Refresh Token Flow. SERVICES OFFERED--------------------------------------------------------------------------- • Design, development and integration of APIs/webhooks. • Writing packages and libraries in JavaScript. • MQL and Aggregation Pipeline writing for complex queries. • Consultation for MongoDB Data modelling and database administration. • Creating GitHub Actions and workflows. PUBLISHED NPM PACKAGES----------------------------------------------------------------- • group-objects-array • deduplicate-array • array-has-value • get-dtype-of • resolve-dotstringkey • @jsonalytix/lookup • @jsonalytix/limit • @jsonalytix/skip ** Links for these packages can be found from Portfolio. *** MONGODB UNIVERSITY COURSES COMPLETED------------------------------------------ • M312: Diagnostics and Debugging • M121: The MongoDB Aggregation Framework • M201: MongoDB Performance • M103: Basic Cluster Administration • M320: Data Modelling • M112: Diagnostic Thinking • M150: Authentication & Authorization • A300: Atlas Security • A131: Introduction to MongoDB Charts • M100: MongoDB for SQL Pros • M220JS: MongoDB for JavaScript Developers • M001: MongoDB Basics ** Certificates and their links can be found from Portfolio. *** SKILL SETS ------------------------------------------------------------------------------------- Node.js . JS . TS . npm . express . axios . Jest . Mintlify . JWT . OAuth 2.0 . PKCE . OIDC . SAML . SSO . Duende . Auth0 . Okta . REST APIs . webhook . websocket . Kafka . OpenAPI . MongoDB . MongoDB Atlas . MongoDB Compose . MongoDB Chart . Mongosh . mongoimport . mongoexport . mongodump . mongorestore . mongotop . mongostat . MySQL . SQL . PostgreSQL . Redis . VM . Vagrant . Docker . Docker Compose . Docker Desktop . YAML . Ubuntu . Bash . SSH . Git . GitHub . BitBucket . GitHub Actions . AWS . Azure . GCP . Java . Python . PHP . Perl . Excel VBA . --------------------------------------------------------------------------------------------------------- Thank You !!!

Java
Google Cloud Platform
Microsoft Azure
AWS Development
HubSpot
OKTA
Auth0
User Authentication
OAuth
HTML5
Perl
Python
JavaScript
Node.js
MongoDB
$58 hourly
- 4.9/5
- (912 jobs)
I can create/modify any type of strategies/indicators and also can connect bot for auto trading. You can also contact me for : ✔︎ Any type modification in pinescirpt that you are thinking ✔︎ Stop Loss, Take Profit, Backtest ✔︎ Session, Time ✔︎ Alerts. ✔︎ Converting (MT4,MT5, Thinkorswim or NT8 or any other ) platform to pine script ✔︎ You can also contact me for java I am a trader also so I can easily understand the stock/forex market and requirements. NDA : I guarantee you. Your complete information will be kept secret and it will not be given by me to anyone else.

Java
Stock Price Prediction
Financial Analysis
Python
Scripts & Utilities
Automation
Bot Development
Scripting
Trading Strategy
Script
Forex Trading
Technical Analysis
Stock Market
TradingView
Pine Script
$35 hourly
- 5.0/5
- (12 jobs)
I have 18+ years of experience in software development in Telecom, Banking, and Healthcare domains. Primary skillsets include Big Data eco-systems (Apache Spark, Hive, Map Reduce, Cassandra), Scala, Core Java, Python, C++. I am well versed in designing and implementing Big data solutions, ETL and Data Pipelines, Serverless and event-driven architectures on Google Cloud Platform (GCP), and Cloudera Hadoop 5.5. I like to work with organizations to develop sustainable, scalable, and modern data-oriented software systems. - Keen eye on scalability, sustainability of the solution - Can come up with maintainable & good object-oriented designs quickly - Highly experienced in seamlessly working with remote teams effectively - Aptitude for recognizing business requirements and solving the root cause of the problem - Can quickly learn new technologies Sound experience in following technology stacks: Big Data: Apache Spark, Spark Streaming, HDFS, Hadoop MR, Hive, Apache Kafka, Cassandra, Google Cloud Platform (Dataproc, Cloud storage, Cloud Function, Data Store, Pub/Sub), Clouder Hadoop 5.x Languages: Scala, Python, Java, C++, C Build Tools: Sbt, Maven Databases: Postgres, Oracle Worked with different types of Input & Storage formats: CSV, XML, JSON file, Mongodb, Parquet, ORC

Java
C++
Apache Spark
Scala
Apache Hadoop
Python
Apache Cassandra
Oracle PLSQL
Apache Hive
Cloudera
Google Cloud Platform
$70 hourly
- 5.0/5
- (30 jobs)
Experienced Entrepreneur with a demonstrated history of working in the software industry since 25+ years. Skilled in C++, Win32, MFC, Visual Studio, C#, WPF, .Net, WSL, Linux utilities/services, AWS, Docker, Blockchain, MQTT, Node.js, React.js, Next.js, Node.js, C#, Requirements Analysis, PHP, Python, C++, and Agile Methodologies. I carry huge experience in NLP, vision software, OCR/OCV, openCV, CAD/CAM, Smart Meter, DLMS/COSEM, Smart Meter Control Software, GuruX, Smart Meter Calibration, Automation, Telemetry. Experienced in working with broad range of microcontrollers including NRF51822, NRF52832, STM32F4, STM32F0, STM32F1, STM32L1, STM32L4, STM32H5, NXP RT1050, PIC32MX, MSP430, STM8S, STM8L, PIC16, and 8051. Expertise in a wide array of industry verticals, such as metering (Electricity and Water), fire safety, data loggers (Battery operated), streetlight, and wearables Strong background in designing and developing firmware architecture and solutions Proficient in both wired and wireless communication technologies and interfacing the same, including BLE, Wi-Fi, Ethernet, and Cellular Deep understanding of DLMS/COSEM metering protocols, integration of the same and also experienced in certifying meter with DLMS stack through CTI file and CTT tool. Experienced in implementing DLMS with various interface profiles, including HDLC-based serial profiles for meter communication over Optical, RS485, and RS232 interfaces. Additionally skilled in using TCP-based wrapper profiles for seamless communication with meters over Ethernet and Cellular networks Advanced in C programming, with familiarity in C# and Python for supporting tools and utilities. Well-versed in various IDEs and version control tools such as SVN and Git Experienced with various MCU interfaces including SPI, I2C, ADC, DAC, Timers, DMA, UART, CAN, LTDC, MPU, Flexible memory controller, FlexSPI-Quad SPI Extensive experience development on FreeRTOS-based development and also bare-metal development Deep understanding of low-power design, battery-operated products, and efficient power management techniques Expertise in secondary bootloader development, secure firmware upgrades, and troubleshooting complex firmware issues No matter what you are after, a proof of concept, maybe an MVP, architecture or a full fledged app, I'd be eager to help you realize your idea and accomplish your goals.

Java
Image Processing
Computer Vision
OAuth
Google Apps Script
Auth0
Machine Learning
Desktop Application
OpenCV
React
Node.js
React Native
.NET Framework
Python
C++
$35 hourly
- 5.0/5
- (10 jobs)
I'm an experienced programmer who's all about Android app development. I've been at it since 2018, and I'm all about crafting high-quality Android apps that work well and follow the best coding rules for a great user experience. My preferred approach involves utilizing the "Clean Architecture" pattern combined with MVVM architecture in my projects. Additionally, for larger and complex projects, I follow the "Test-driven development" approach, ensuring robust and reliable outcomes. I am proficient in both Java and Kotlin, although I prefer using Kotlin for new projects. Here are some key highlights that define my work experience: 🚀 Extensive familiarity with Jetpack libraries, including Navigation Component, Room Database, Data Store, Data Binding, ViewModels, Work Manager, LiveData, and Jetpack Compose. ⚙️ Proficient in utilizing various Android components such as Activity and its lifecycle, Fragment with lifecycle, Alarm Manager, Services, Broadcast receivers, Intents, and Shared Preferences. ⚡ Well-versed in Kotlin coroutines, Flows, and Channels, leveraging them for efficient asynchronous programming. 🏗️ Expertise in implementing the MVVM pattern and Clean Architecture, resulting in modular and maintainable codebases. 🧪 Proven track record of implementing unit testing methodologies and frameworks to ensure the quality and stability of applications. 🛠️ Familiarity with essential tools and libraries such as Retrofit, Dagger Hilt, Arduino, TensorFlow Lite, Java, Firebase, Bluetooth, BLE, and Wifi, allowing for seamless integration of various functionalities into Android apps. 📨 Proficiency in working with notifications to provide users with a comprehensive app experience. Feel free to reach out to me if you have any queries or would like to discuss your project further.

Java
Unit Testing
Firebase
Gradle
Android SDK
WiFi
Kotlin
Clean Architecture
Bluetooth
Arduino
Mobile App Development
Android Room Persistence
Bluetooth LE
Android Studio
Android App Development
$60 hourly
- 5.0/5
- (31 jobs)
I am a full stack developer with more than 15+ years of experience in Java Web Applications based out of Kochi India. ✅ Languages: Java/ J2EE, Javascript, HTML, CSS ✅ Backend Frameworks/ Libraries: Spring MVC, Spring Boot, Spring Integration, Spring Webflow, Spring Batch, Spring Reactive, Node JS ✅ Frontend Frameworks/Libraries: JSP, JSF, Primefaces, Bootstrap, Angular, React JS, Vue JS ✅ Database: Postgres, MSSQL, Oracle, MySQL, Mariadb, Redis, Neo4j, Cassandra, Mongo DB ✅ Cloud: AWS, GCP (Google Cloud), Azure, DigitalOcean ✅ Services: Authentication Services (Oauth, Auth0, Cognito, Keycloak), AWS Pinpoint, Databricks, Snowflake ✅ Open Source Projects: Archivesspace, Fineract, Hyrax ✅ Unit Testing: Spring Test, Mockito, EasyMock, PowerMock, Junit, Karate ✅ Other: OpenSearch, REST, SOAP, SDK, Mircroservices, API Integration ✅ Build Tool: Gradle, Maven, ANT ✅ CI/CD: Jenkins/ Bitbucket Pipeline/ Ansible/ Terraform ✅ Approches: TDD, BDD I have successfully worked with clients across various industries, including Fintech, Capital Markets, Banking, Insurance, Telecommunications, Retail etc and have a proven track record of delivering large-scale, enterprise-grade solutions. Whether you're looking for guidance on high-level architectural decisions or hands-on assistance with development, I can provide the expertise you need to drive success. Let’s connect to discuss how I can help you solve your technical challenges and create solutions that will scale with your business.

Java
Reactive Programming
Spring Cloud
Google APIs
Cloud Computing
CSS
React
JavaScript
Web Development
Vue.js
JUnit
Database
Spring Boot
SQL
$45 hourly
- 5.0/5
- (33 jobs)
Software engineering is a true passion of mine. I believe that nowadays economy streamlining and optimizing processes is the best way to decrease costs, speed up operations, and gain a competitive advantage. I have saved my clients' thousands of hours using Automation solutions and application integrations. The time savings come from raw savings through automation and through process optimization. From end-to-end process automation to custom libraries, I have managed it all by keeping the code maintainable, robust, and well organized. Anything that's done multiple times, and is rule-based, can be automated. I work with companies of different sizes and various industries, focusing on finance, healthcare, logistics, manufacturing etc. I always keep legal aspects in mind - the softwares and automation are always 100% compliant with current regulations. If you have a software related use case in mind, feel free to reach out. Let's talk!

Java
.NET Framework
Bot Development
Build Automation
Vue.js
Automation Anywhere
Robotic Process Automation
UiPath
Scripting
API Integration
JavaScript
Python
Microsoft Excel
Automation
Data Scraping
$35 hourly
- 4.8/5
- (24 jobs)
🚀 Top Rated Plus Freelancer | 100% Job Success | $100k+ Earned | 1000+ Clients 💻 Web & Mobile Full-Stack Developer: WordPress | React | Flutter | PHP Hi there! With over 11+ years of experience, I specialize in Web and Mobile App Development, delivering scalable, secure, and high-performance solutions that help businesses succeed online. Whether you need a cutting-edge mobile app, a robust e-commerce website, or an optimized, SEO-friendly platform, I’ve got you covered. 🔥 Technologies I Excel At: Web Development: Frontend: React.js, Angular, HTML5, CSS3, JavaScript, Bootstrap, Tailwind CSS. Backend: PHP (Laravel, CodeIgniter), Node.js, RESTful APIs, GraphQL. CMS: WordPress (Elementor, Gutenberg, WooCommerce), Shopify, Joomla, Drupal, Squarespace. Mobile Development: Cross-Platform: Flutter, React Native. Native: Swift (iOS), Kotlin (Android). API Integration: Payment Gateways, Firebase, Maps, Social Login. E-commerce Solutions: WooCommerce, Shopify, Magento, BigCommerce, OpenCart. DevOps & Hosting: AWS, Google Cloud, Docker, CI/CD pipelines, Cloudflare. 🌟 Key Services: Custom Website & Mobile App Development. Website Optimization: Speed, SEO, and security enhancements. Migration & Maintenance: Hosting transfers, updates, ongoing support. Bug Fixes: Hacked website recovery, troubleshooting, and debugging. 💎 Why Choose Me? Proven Track Record: 1000+ successful projects with Fortune 500 clients and startups. Expert Communication: Clear, timely, and client-focused. ROI-Driven Results: I prioritize business growth through impactful designs and features. Money-Back Guarantee: Your satisfaction is my priority. I’m passionate about building solutions that drive results. Let’s collaborate! Invite me now to bring your vision to life. Regards, Praveen J

Java
Flutter
ChatGPT
AI Chatbot
Laravel
Kotlin
iOS
Mobile App Design
Web Application
Android App Development
React Native
Python
Swift
iOS Development
Mobile App Development
$40 hourly
- 5.0/5
- (13 jobs)
⭐ 100% Job Success Score | Top Rated Developer 💼 Power Platform Architect & Developer with 5+ Years of Experience Hi, I'm Vishal—transforming ideas into reality and accelerating your projects with my expertise. With over 5 years in the field, I specialize in building high-impact solutions on the Power Platform and integrating them seamlessly with your business needs. 🚀 Why Work With Me? 🔧 Versatile Skill Set: From developing powerful Power Apps and crafting efficient Power Automate flows to building intelligent Power BI dashboards and Power Virtual Agents. I also bring robust backend expertise with Java, Spring Boot, and sleek frontend solutions using React.js. 🌟 Proven Track Record: I deliver more than just code—I bring value. My commitment to quality, clear communication, and on-time delivery sets me apart. I don’t just meet deadlines; I exceed expectations. 🔗 Integration Expertise: Need to connect your app with SharePoint, Dataverse, or third-party services like Twilio and Shopify? I create seamless integrations that enhance functionality and drive results. 🤝 Client-Centric Approach: I understand that every project is unique. I take the time to understand your goals and offer tailored solutions that align with your vision. 💼 My Core Services 🛠️ Power Platform Solutions: End-to-end development of Power Apps, Automate workflows, and Virtual Agents. 🌐 Integration Mastery: Connecting your systems for seamless data flow and enhanced capabilities. 📊 Data-Driven Insights: Advanced data management and visualization using Power BI, SharePoint, and SQL. ⚙️ Scalable Backends: Robust, scalable backend development with Java and Spring Boot. 🎨 Frontend Brilliance: Engaging user experiences using HTML, CSS, JavaScript, and React.js. 🧩 Innovative Problem Solver: I tackle complex challenges and deliver solutions that exceed expectations. 📈 Continuous Improvement: I stay ahead of industry trends to bring you the latest in tech and best practices. 📩 Let’s Elevate Your Project! Ready to turn your vision into reality? Let’s connect and discuss how I can help you achieve your goals with excellence.

Java
Microsoft 365 Copilot
JavaScript
Spring Boot
Business Applications Consultation
Microsoft Power Automate
Microsoft SharePoint
Microsoft SharePoint Development
Microsoft PowerApps
$50 hourly
- 5.0/5
- (26 jobs)
Software Engineer Full Stack Developer Crypto Advisory & Consultancy Services Backend Python & FastAPI Backend Rest & SOAP Services Java Backend Service with Framework --> Spring, Spring-boot, Hibernate Python - FastAPI JavaScript Backend Postgres Database Language Front End Web3 Angular Development Jquery, HTML, CSS Backbone.js Framework Python Scripting & Automation (Delivered more than 20 Automation Scripts) Blockchain Solidity Developer -Token Launches (ERC20 - Mintable - Burnable - Presale / IDO / ICO for tokens via ETH/ERC20 - NFT ERC721 / ERC721A Contracts (Pre Sale, whitelisting, airdrop, royalty, raffle rewards) All my contracts feature the following: - Latest Solidity Version - Latest contract design standards - Large number of tests to check all code - Making sure security practices are followed

Java
NFT
Angular
Cryptocurrency
NFT Minting
Solidity
Spring Framework
Python Script
Cypress
Blockchain
web3.js
API Development
RESTful API
Automation
Python
$150 hourly
- 4.8/5
- (12 jobs)
PKI Security products and solutions related Cryptography, PKCS#11, HSM, Smart Card, Multi-factor Authentication, OTP Authentication, Bio-metric authentication, Application Security, Encryption, Digital Signature, CSP, Credential Provider, solution conforming to NIST FIPS-140 level 2/3 certification, PIV, CAC, Entrust, Id-entrust, CMS solutions, MS Identity life cycle Manager, Minidriver, SSL and VPN integration, Various Identity access control and management solutions, PDF Signing on Mobile, Remote PDF signing, Personalization of NFC mifare Classic 1K and 4Ksmart card, Access authentications, Worked on solutions targeted for Desktop (Windows, Linux, Mac), Embedded Software, IOT Device solutions, Android Native Development, Cloud solutions, - Languages*:: C, C++, Java, QT, C# ,Python,Javascript, TypeScript - Operating System:: Windows, Android,vxWorks, Linux, Embedded Linux - Tools:: GCC, GDB,LLVM, LLD, Android Studio, Shell scripting, Eclipse, Visual Studio - Standards/ API:: PKCS # 11, #12 , MS CAPI, Credential Provider, TokenD, KeyChain APIs, ISO - 7816, Bluetooth / Bluetooth LE APIs, FIPS-140 level 2 & 3, KMIP specification, FIDO specifications, PCSC lite, EMV specification, Master/Visa, ANSI Standard for key exchanges, TR31 and TR34 Key blocks, PIN, PCI DSS, CCSS level 3, - OpenSource:: OpenSSL, OpenSSH, BouncyCastle (FIPS/Non-Fips) - Web Technologies:: NodeJS, Protobuffer, DJanfo, Angular, HTML, CSS, React.js, Next.js, XML, WS security - HSM: IBM CloudHSM, AWS-CloudHSM, Google Cloud HSM, Azure Cloud HSM, Thales DPoD, Thales Luna HSM, AWS-KMS, Payment HSMs, SafeNet CloudHSM, DPoD, SoftHSM, AWS Payment Cryptography, nShiled, CiperTrust, Utimaco, - Blockchain: Bitcoin and Ethereum signing with CloudHSM, BIP32 Signing, secp256k1 signing, Ethereum Signer with CloudHSM.

Java
OAuth
Windows API Development
Blockchain, NFT & Cryptocurrency
C++
JavaScript
Reverse Engineering
NFC
C
Android
Python
Cryptography
Application Security
Encryption
Information Security
Linux
Elliptic Curve Cryptography
$35 hourly
- 4.9/5
- (29 jobs)
I would like to work with you with mindset of a partner in your journey and see you succeed in achieving your goals using my expertise with commitment and honesty. If you are creating innovative products or prototypes in IoT domain and looking for help in building software for the same, I am here to help you. I am passionate about learning new things and applying the knowledge to solve interesting real life problem. I am an entrepreneur, freelancer, software professional and technology enthusiast with 22 years of industry experience. I can help you in developing various components of products or prototype in Internet of Things domain. I respect and value your and my time. I understand the value of commitments, honesty and clear communication. I will understand the scope thoroughly before starting on any task and will not stop until it is delivered to your satisfaction. I am also flexible with changing requirements, but expect it to be handled professionally. I am also passionate about solving complex technology problems and applying them to real life situations. I have developed software for several products and prototypes for my own tech startup in IoT domain like smart touch switches, smart street lights, hotel automation. I will be working with you as individual freelancer and not as agency. My skills include: Firmware development (ESP32, ESP8266, Arduino, Raspberry PI), AWS (User authentication, Lambda, IoT, DynamoDB) configuration and programming, Alexa Skill Kit: Skill development (Interactive Skills and Smart Home Skills) Web development(React Js, Bootstrap), Android App development, Flutter App development. I have in-depth knowledge and experience of customizing networking stack (TCP/IP, UDP, ARP, Layer-2) on custom network processors. Thank you very much for visiting my profile and taking time to read it completely. Looking forward to connect with you!

Java
UART
Multithreaded Programming
FreeRTOS
Node.js
Internet of Things
AWS IoT Core
Firmware
Microcontroller Programming
C++
Embedded System
ESP32
Arduino Firmware
Bluetooth
$75 hourly
- 4.9/5
- (8 jobs)
19+ years of product development expertise as a startup entrepreneur, deep-tech developer, and former agency owner. Now a full time Product Manager and Fractional CTO. I will make sure your project avoids the usual mistakes and lead it to success, even if it means sometimes (rarely) pushing back and helping you understand the how and why. Expertise in Web Apps, Hybrid and Native Mobile Apps, Game Development, DevOps, Automated Testing, Full Stack Development, Ai/ML, Image Processing, Audio Signal Processing, Algorithm R&D, Performance Optimization. Here is how I have ensured success for my clients: ⚪️ Developing deep understanding of customer experience at strategic, tactical and transactional levels. Coordinating user stories, functional, and technical details with all stake holders throughout each iteration. ⚪️ Market Research to identify user needs and design product features for those needs. Competitor Analysis from a technical perspective to identify gaps in relative strengths and weaknesses. Identify opportunities to extend lead on strengths and catch up on weaknesses. ⚪️ Designing product architecture for future scalability without overly complicating current implementation. Researching and selecting most appropriate technology frameworks and 3rd party dependencies. ⚪️ UI/UX to maintain product usability and simplicity for first-time users and casual use-cases - while accommodating ever increasing feature lists for expert users and edge use-cases. ⚪️ Extensive experience managing small teams with remote team members, and large projects with multiple distributed teams. Across multiple projects and teams, established and maintained simple processes to ensure sufficient communication, accountability, discipline, motivation and productivity. ⚪️ Maintaining Backlog and managing Scrums and Sprints. Strong knowledge of Agile methodologies. ⚪️ Leading and coordinating cross-functional teams throughout the product development and project execution process. ⚪️ Budgeting, estimating and negotiating contracts with combination of fixed and variable cost structures to ensure win-win outcome for all stakeholders. ⚪️ Successfully migrated multiple legacy products to cross-platform or modern technology stacks, consolidating the skill-sets needed in team for further maintenance and development. Reduced technical team size by 3x. Improved delivery speed, frequency and stability by 2x. ⚪️ Implementation and adoption of DevOps and Automation. ⚪️ Implemented multiple Predictive Ai/ML computer vision projects. Since when it was called image processing, audio/signal processing, and model training. ⚪️ Ensured regular knowledge-transfer and cross-training among team members to maintain each module’s Truck-Number above 2. (The TruckNumber is the size of the smallest set of people in a project such that, if one of them got hit by a truck, the project would be in trouble). ⚪️ Recruiting and candidate shortlisting with mix of expert consultants, senior members and junior members to balance costs while maintaining delivery speed and implementation of good technical architecture, code quality, best practices etc. ⚪️ Identifying and covering-up skill gaps in team with combination of training existing members and recruiting new talent. Besides executing full projects, I am available for fire-fighting those complicated stuck parts in complex projects, and for consulting on product development and technical architecture.

Java
C++
JavaScript
Swift
Objective-C
WebGL
TensorFlow
Web Application
Mobile App
Hybrid App Development
DevOps
UX & UI Design
Agile Software Development
Project Management
Product Management
$55 hourly
- 5.0/5
- (10 jobs)
✔️ Extensive Experience in DevOps - Expertise in Azure DevOps, developing and implementing robust deployment pipelines, monitoring systems, and automation tools. - Skilled in designing and deploying cloud infrastructure, working with containers, and managing DevOps workflows. ✔️ Proficient in Enterprise Software Solutions - Well-versed in ERP, SAAS, and CRM systems, with the ability to develop end-to-end solutions that cater to specific client needs. ✔️ Java Full Stack Development Expertise - Capable of developing comprehensive solutions using Java Full Stack Development, ensuring a seamless user experience. ✔️ Experienced Yardi Voyager Consultant - Helped clients implement and customize Yardi Voyager to meet their business requirements, providing tailored solutions. ✔️ Client-Focused Approach - Committed to delivering high-quality solutions, ensuring client satisfaction through regular communication and feedback. Freelance Yardi Consultant (Yardi Breeze, Yardi Bookkeeping, Yardi Voyager) ✔️ Collaborated with clients to understand business requirements and provided tailored Yardi software solutions. ✔️ Configured and customized Yardi Breeze, Yardi Bookkeeping, and Yardi Voyager software to meet specific client needs. ✔️ Provided training and support to end-users for smooth software adoption. ✔️ Developed and maintained documentation, including functional and technical specifications, training materials, and user manuals. ✔️ Delivered projects within agreed timelines and budgets, ensuring high-quality outcomes. ✔️ Maintained regular communication with clients for project updates, feedback, and addressing concerns. DevOps Engineer at Discover Financial Services (USA) ✔️ Supported the Java environment and managed deployments, focusing on resolving issues in live production environments. ✔️ Used tools like AppDynamics, Kibana, Postman, SOAPUI, Secure-CRT, VMware PCF, Autosys, ServiceNow, and IBM WebSphere to monitor and manage production environments. ✔️ Quickly identified and resolved issues to ensure smooth system functioning. ✔️ Communicated regularly with clients and senior management for project updates, feedback, and issue resolution. ✔️ Worked on both Windows 10 and UNIX/Linux batch servers and Java-based applications. ✔️ Ensured successful functioning of Discover Bank IT Credit Card for Java, API (PCF), and backend (Server) issues. Java Developer at Capgemini ✔️ Developed a robust backend using Spring Boot to handle large volumes of data. ✔️ Created a user-friendly frontend using Angular, enhancing the user experience with features like search, booking, and payment modules. ✔️ Collaborated with team members to ensure timely project delivery. ✔️ Worked closely with clients to gather requirements, provide updates, and gather feedback. ✔️ Helped create a high-quality, scalable flight booking system with a focus on user experience.

Java
CRM Development
ERPNext
Next.js
NestJS Development
Stripe API
API Integration
Azure OpenAI Service
Azure DevOps
Yardi Software
Python
CI/CD
Real Estate
Kubernetes
Microsoft Azure
$35 hourly
- 5.0/5
- (5 jobs)
I have a passion for machine learning and AI, and am dedicated to using algorithms to solve real-world problems. I am a skilled competitive programmer with a strong background in coding, data structures, algorithms, physics, and mathematics. I am capable of providing students with guidance and support for their projects and coursework. Additionally, I have a keen interest in electronics and enjoy designing circuits, conducting simulations in Verilog, NGspice, Cadence, and evaluating their viability.

Java
Physics Tutoring
DevOps
Chemistry
Mathematics Tutoring
Algorithms
Image Processing
Electronics
Algorithm Development
Data Structures
CSS
Image
MATLAB
Cloud Computing
Python
$50 hourly
- 4.7/5
- (16 jobs)
Professional Strengths * Having 10+ Years of experience in the analysis, design, and development of applications primarily using J2EE Technologies and Newgen Products * I am reliable, well organized, and used to working on my own initiative. * I am able to prioritize my workload. * I am comfortable working on my own or as part of a team.

Java
RESTful API
Spring Security
Spring Framework
Spring Boot
SQL
Oracle Programming
React
J2EE
Angular
Data Structures
JavaScript
Python
$45 hourly
- 4.7/5
- (21 jobs)
Are you seeking a versatile and accomplished professional who can harness the power of AI, ML, and Full Stack engineering to drive your business forward? I'm the right person. I am Ajay, a business-oriented Machine Learning Engineer and Full Stack developer with a proven track record of delivering exceptional results. - Generated over $400K in returns for a AI company, startups I worked with raised over $10M from top-tier VCs (Rewatch, Combine AI). - Worked closely with top-world startups backed by renowned entities like Rewatch, Combine AI, Joineight, Urban Ventures and Junket Cloud, building robust AI solutions to fuel their success. 🚀Technical expertise includes: ✔️ ChatGPT integration + End2end implementation of advanced chatbots ✔️ JS frameworks - NodeJs, React, Angular, Next, Vue... ✔️ Rest API and GraphQL ✔️ Java + Spring Boot, Python, Ruby on Rails, Typescript ✔️ Database - MySQL, PostgreSQL, and MongoDB. ✔️ DevOps - AWS, Firebase, Heroku, GCP, and Nginx. ✔️ Version Controls - GIT, Bitbucket. ✔️ Teamwork tools - Jira, Asana, Trello ... 📞 Let's jump on a call or a quick chat so that we can talk about the details and discuss how my skill set would work best in your project.

Java
Computer Vision
Natural Language Processing
Neural Network
Artificial Intelligence
Machine Learning
Bot Development
Amazon Web Services
JavaScript
React
Node.js
Spring Boot
Ruby on Rails
Python
ChatGPT
$45 hourly
- 5.0/5
- (29 jobs)
🌟 Top Rated 🌟 🔹 5+ Years of professional experience, worked as a full stack developer and embedded developer 🔹 Strong problem solving (Leetcode Knight) and debugging skills As a Software Engineer at Amazon, I work on developing and maintaining scalable and reliable software solutions. I use my skills in Java and Object-Oriented Programming to write clean, efficient, and modular code that follows best practices and standards. I also collaborate with other engineers, product managers, and stakeholders to deliver high-quality products and services that meet customer needs and expectations. Before joining Amazon, I was a Senior Technical Assistant at DRDO, Bangalore. I have a strong passion for learning new technologies and enhancing my skills. I have completed multiple courses and certifications on Coursera, such as Unordered Data Structures, Ordered Data Structures, and Object-Oriented Data Structures in C++. I aspire to become a proficient and versatile software engineer who can solve real-world problems and create positive impact. Skills: ✅ Languages: C/C++, Java, Python, JavaScript, C#, HTML & CSS. ✅ Frameworks and Tools: Spring Boot, Flask, Git and React. ✅ Concepts: Object-Oriented Programming, Databases, Data Structures and Algorithms, Problem Solving, Low level OS development, RESTful APIs, Design Patterns, SOLID Principles, Unit/Integration Testing, N-Layer Architecture, Microservices.

Java
CSS 3
C
SQL
CSS
HTML
JavaScript
Python
C#
C++
$40 hourly
- 4.5/5
- (83 jobs)
I spent around seven years working in various tech companies in Silicon Valley. I worked in small and large companies. Full Stack Developer with over 10 years of experience in Web, Mobile, React, Angular, Vue, React, Python, Led development of $500K research project which was deemed a "gold standard" by the client. Increased client's revenue 5-fold after fine-tuning algorithms. Well Polished and Excellent Communication Skill ✅ 100% Project Success ✅ Flexible Pricing and Time ✅ Strict QA Processes ✅ Time-Bound Delivery ✅ Flexible Costing Model Free consultation about your any software development idea

Java
React Native
Angular
React
Android
App Design
Full-Stack Development
NodeJS Framework
Blockchain
web3.js
NFT
Node.js
Blockchain Architecture
Python
$35 hourly
- 4.9/5
- (70 jobs)
✅ Top Rated Freelancer ✅ Fluent English ✅ 5 Star Ratings and Reviews. ✅ 12+ Years of Experience in Android and iOS App Development. Full stack developer with Native iOS, Native Android, Xamarin, and React Native background. Agile approach, iOS, and Android solutions, UI/UX, and well-documented project management - let's talk about your app! Worked on more than 150+ mobile applications and I am open to long-term business relationships. Technical Skills:- * Programming:- Swift, JAVA, Kotlin, React Native, Objective C, Xcode. * Database:- Firebase, My SQL, Azure, Realm, SQLite, MongoDB, Amazon DynamoDB, PostgreSQL * API Integration:- Google Map API & Google Analytics, Facebook, Google Places API, Twitter, LinkedIn, Amazon Web service, AZURE, Twilio, ZenDesk, Sendgrid. * Payment Gateway:- PayPal, Stripe, RazorPay * Source Control:- Github, BitBucket, Gitlab * Designing: Wireframe, Zeplin, Photoshop, Adobe PhotoShop, Mock Ups Why I am different from others? Powerful communication skills. Focusing fully on Apple and Android Development guidelines. 100% dedication to the projects. Fully focus on UI/UX Patterns High knowledge in App Marketing, App Monetisation, and much more. Looking for a long-term work relationship. Thanks a lot for checking my profile.

Java
WordPress
Apple Xcode
Android App Development
API Integration
NativeScript
Swift
Objective-C
Kotlin
PHP
React Native
$70 hourly
- 4.9/5
- (89 jobs)
High Frequency and Algo trading system architect . Having experience of 10 years and delivered more than 50 system for both Corporate and retail clients . Worked with Big investment bank and have expertise in forex, Equity, Future,Option,Bonds, Crypto trading. I have expertise in building complete application for financial advisory company . Worked across the Globe

Java
Bitcoin
Forex Trading
Blockchain
$55 hourly
- 4.9/5
- (160 jobs)
⭐⭐⭐ "Unni did excellent work! Trustworthy and capable. Great communication" ⭐⭐⭐ ⭐⭐⭐"Am writing this review to express my deep gratitude and appreciation for Unni's remarkable contribution to our project. Unni has demonstrated an exceptional ability in managing a complex integration task, a challenge that had previously stymied the efforts of five other individuals". ⭐⭐⭐ ⭐ I am senior developer specializing in Back-End and Cloud development. 👑 24 years of professional application development experience ✅ 150 ➕ Jobs ✅ 150 ➕ Reviews ✅ 3000 ➕Hours I have worked with ⭐High Profile clients⭐ in my Career which I have listed some of them below: ✅ FirstTennessee (Fortune 500) ✅ Amex (Fortune 500) ✅ EDB Norway ✅ ICICI Bank My core expertise and experience are: ✅ Android Application development ✅ Web development using Java 8, Spring Boot framework, JavaScript, HTML 5 ✅ Back end development with Java 8, Spring Boot frame work ✅ REST API development using Spring Boot ✅ Desktop development using Swing and JavaFX ✅ Micro services with Spring Boot ✅ Experience in Graph algorithms ✅ Bitcoin and Block chain development using Bitcoinj frame work ✅ Eclipse RCP development ✅ Open source application modification and development ✅ ChatGPT ✅ Java - 12+ years ✅ Java 8 - 5 years ✅ JavaScript - 5+ years ✅ Spring Boot - 3 + years ✅ Spring Framework - 3 + years ✅ React ✅ GraphQL ✅ AWS ✅ AWS Lambda ✅ Cloud Development ✅ AWS Amplify ✅ Aws AppSync ✅ DynamoDB ✅ Quarkus framework ✅ Micronaut ✅ CI/CD ✅ Android - 2 + years ✅ Spring Security - 2+ years ✅ WebRTC , WebSocket - 2+ years ✅ Python - 1+ year ✅ Node.js - 1 + year ✅ Play Frame work - 1 year ✅ GIS Development - 1 year I would like to go the extra mile to meet customer expectations for every project I am doing with 100% quality. I am looking for long-term association with clients to get complete benefits and am interested in achieving their business objectives and goals.

Java
Apache Kafka
API Development
Micronaut
Spring Security
Spring Boot
Core Java
Apache Maven
Spring Framework
GraphQL
Android
Android App Development
Python
Firebase
JavaScript
$35 hourly
- 5.0/5
- (19 jobs)
As a Senior Software Engineer, I specialize in architecting and developing web and AI applications. My expertise includes Microservice Architecture, LLM fine-tuning, and RAG chat bots. I have successfully implemented Search-Based Applications, Streaming applications, and Recommender System. Certified as an AI developer by deeplearning.AI and IBM, my proficiency extends to ML and Deep Learning. I consistently adhere to best coding principles, design patterns, delivering optimized, scalable, and maintainable code. My Tech Stack: Programming Languages: Java, Nodejs, Python Web Frameworks: Spring Cloud, Spring, Spring Boot, Flask, Express, Hibernate, Spring cloud gateway, Resilience4J, Netflix-Eureka, Spring Cloud Stream, Django ,JDBC, Maven, Gradle, Spring web flux Technologies: Docker, Zookeeper, Jenkins, Prometheus, Grafana, Kibana, Elastic APM, Sleuth, Logstash Search Engines: Lucene, Elasticsearch, Apache Solr Data Streaming: Kafka, RabbitMQ Databases: Mysql, SQLite, Redis, MongoDB, Amazon S3 Big Data: Hadoop, Apache Spark Cloud Platforms: AWS, Google Cloud Data Analytics Libraries: Panda, Numpy, Tensorflow LLM Integeration: Langchain, Open AI ChatGPT Summary of Projects: ChatGPT Integration: Integrated ChatGPT seamlessly with a .NET/Angular-based web application to empower users in creating strategies and PVVV statements through intuitive prompts. Retrieval Augmented Generative Chatbot: Developed a context-aware Q&A bot using Langchaing and ChatGPT, ensuring an engaging and intelligent conversational experience. Double Entry Banking Application (Bukuwarung): Successfully implemented a robust Double Entry-based Banking application for Bukuwarung in Java, Spring Boot, Spring Web Flux, and Postgres. Migration to Microservice Architecture(Times Internet): Led the migration of a monolithic application to a Microservice architecture at Times Internet, leveraging the Spring Cloud ecosystem for enhanced scalability and performance. Realtime Popularity-Based Product Sorting (Deutsche Telekom Digital Limited): Introduced a Realtime Popularity-Based Sorting feature for product listings at Deutsche Telekom Digital Limited, enhancing user experience with Java, Redis, MySQL, Spring, Hibernate, and Spring Cloud. Microservice Development (Deutsche Telekom Digital Labs): Spearheaded the creation of a Microservice from scratch, implementing Auto Suggest, SRP, and Product discovery for Deutsche Telekom Digital Labs, providing efficient product search and recommendation capabilities. Event-Driven Architecture (Apache Kafka): Implemented an Event-Driven Architecture based on Apache Kafka, enabling asynchronous communication between microservices, improving system responsiveness, and scalability. Search Listing Page (Times Internet): Successfully delivered a Search Listing page using Elasticsearch and Apache Solr at Times Internet, significantly enhancing search functionality and user experience. Auto Suggest for Search Bar (Dineout): Implemented an Auto Suggest feature for the search bar at Dineout, contributing to an improved user search experience. Recommendation API: Contributed to the development of a robust Recommendation API using Apache Solr, incorporating advanced algorithms for "You-May-Like" suggestions. AngularJS to Angular2+ Migration (Kpifire Project): Successfully migrated AngularJS to Angular 15 for the Kpifire project, ensuring a smooth transition and enhanced performance.

Java
Apache Solr
LangChain
Kotlin
Spring Boot
LLM Prompt Engineering
Apache Kafka
Hibernate
Angular
Elasticsearch
ChatGPT
AI Development
Machine Learning
Recommendation System
Deep Learning
Python
$35 hourly
- 5.0/5
- (28 jobs)
I am Web Developer with over 10+ years of professional experience in Web Application Development. My Experience: ✔ Developed 20+ enterprise level website ✔ Developed 100+ e-commerce website ✔ Developed 350+ CMS website Tools & Technologies: ✔ Shopify Theme Development and Customization. ✔ Shopify App integration and Custom app development. ✔ Wordpress Theme design and Customize ✔ ACF Plugin and plugin Customization. ✔ Java, Spring, Hibernate, Node and Angular JS, Asp.net, and MVC ✔ REST APIs integration ✔ MY SQL, Mongo DB, SQL Server, Oracle ✔ AWS EC2, AWS s3, AWS SES ✔ Work with many Payment Gateways. ✔ Version Control Tools - Git / Github / BitBucket and many mores ✔ HTML,CSS, Bootstrap, SCSS, LESS, Tailwind etc.. ✔ Adobe Photoshop, Illustrator, XD, Zeplin, Figma Please contact me for above skill-sets.

Java
Shopify Apps
Shopify
Amazon ECS
AngularJS
jQuery
Node.js
SQL
WordPress
MongoDB
PHP
Spring Framework
HTML5
CSS 3
$40 hourly
- 5.0/5
- (15 jobs)
ASP.Net and WordPress programmer having 8+ yrs of experience in Microsoft Technologies and Great Skill in Wordpress Custom Theme design and Development. The primary area of involvements is ASP.NET (C# or VB)3.5/2.0, SQL Server, Object-Oriented Analysis and Design, Database design, Enterprise Application Integration, Unified Modeling Language, Design Patterns and Software Development Process. Other technologies of interest are jQuery, AJAX, API integration, etc. Specialties: - ASP.NET (C# OR VB), .NET Framework 3.5/2.0, SQL SERVER, Javascript, AJAX, Web services, Telerik Controls, jQuery., CMS domain (Sitecore).WordPress Theme Design,Plugin Development,Customize Theme etc.. I have also work in Shopify, PHP, WordPress, Magento, PSD to Html, SCSS, SASS, LESS Logo design, UI Design,Asp.net and MVC etc

Java
WordPress Theme
QlikView
Android SDK
Twitter/X Bootstrap
Bootstrap
MongoDB
WordPress
Node.js
jQuery
CSS 3
PHP
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