Hire the Best JSP Developers
in Poland

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Boris K.

Warsaw, Poland

$48/hr
5.0
122 jobs

Hi👋 I'm Boris K. We focus on RELIABLE software, and mission-critical operations, for which we use custom reliability technology for software (EDC), to prevent business downtime. Main directions: ✅ Reliability engineering: structured review of your application, architecture, AWS infrastructure, deployment process, monitoring, and operational dependencies, followed by a prioritized remediation roadmap. ✅ POS and Multi-Store Commerce: POS, KDS, checkout, payment, catalog, ordering, inventory, loyalty, reporting, and multi-store commerce software for businesses operating across physical locations and online storefronts. ✅ IoT Fleet Management: build secure IoT, telemetry, remote diagnostics, and predictive maintenance platforms for manufacturers, service teams, and operators managing connected devices at scale. ✅ Java Ecosystem Modernization: modernizes Java-based enterprise systems in controlled stages, including EJB applications, Oracle products, application servers, while preserving critical business functionality. ✅ Enterprise Software Rescue: help companies take over, understand, stabilize, and safely continue development of complex Java, Spring, and AWS systems when the existing team, architecture, or delivery process is no longer reliable. ================================================ WE 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. ================= Some tech 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/Spring: SpringBoot/Spring Cloud/Spring Web/Spring AI/Spring Security/Spring Data etc. ✓ Java/JavaEE: EJB, JSP/JSF/RichFaces/Oracle ADF, JavaFX ✓ Spring: SpringBoot, Spring MVC, Web, Security, Data, AI ... ✓ Cloud: AWS, Google Cloud, Docker, Kubernetes, ECS, EKS, Cloud-native apps, scalable clusters, zero-downtime deployment. ✓ AI: Codex, Claude, MCP, RAG, Vertex AI. ✓ Databases: Oracle/PostgreSQL/MySQL, PL/SQL, AWS RDS, big volume storage (AWS Redshift, AWS Athena/S3, Aurora, Cassandra, HDFS), Redis, MongoDB, Neo4j, S3/Parquet, JPA, custom ORMs. ✓ Web: Bootstrap, Angular, React, JavaScript, OAuth. ✓ Servers: Tomcat, Weblogic, JBoss/Wildfly, Websphere. ✓ APIs: REST, SOAP, XML-RPC, WebServices, WebSockets, Swagger/OpenAPI. ✓ 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, GitHub Actions, AWS CodeBuild/CodeDeploy. ✓ Other: Maven, Nexus, Gradle, Ant. I get things done.

  • Java
  • Spring Framework
  • Amazon Web Services
  • Cloud Architecture
  • Internet of Things Solutions Design
  • SaaS
  • API
  • Docker
  • Amazon EC2
  • PostgreSQL
  • MySQL
  • Elasticsearch
  • Spring Boot
  • Artificial Intelligence
  • Large Language Model
Yury B.

Wola Gardzienicka, Poland

$100/hr
5.0
56 jobs

More than 6 last years I've been developing web applications. I have strong PHP (plain PHP, Kohana, Zend Framework, Wordpress, Joomla, Moodle, eyeOS etc), MySQL, Javascript(jQuery/AJAX) experience. Also I have Java and mobile application developement for Google Android skills, experience in Linux administration, software and database architecturing, project management, code and database optimization, SVG, Git, SVN, Facebook API, Twitter API, Google APIs, jQuery Mobile, RegEx, Smarty. If your project requires some other technology - this is no problem for me, and if necessary I'm happy to investigate your project and give you feedback how to improve it. So, if you are looking for reliable, experienced and responsibler web programmer, who is ready to show creativity and initiative, and high quality code is something that makes sence for you - I'm the person you are looking for!

  • Joomla
  • CSS
  • Laminas
  • MySQL
  • PHP
  • jQuery
  • AJAX
  • JavaScript
  • WordPress
  • Apache Subversion
  • Kohana
  • Regex Writing
  • LAMP Administration
  • jQuery Mobile
  • Android App Development
Vova N.

Warsaw, Poland

$80/hr
5.0
22 jobs

I specialize in automating and optimizing your core business processes, particularly across sales and finance. My focus is on connecting critical platforms like your CRM (HubSpot/Pipedrive) with finance software (QuickBooks/XERO), and any other API-enabled software you rely on. Having automated entire departments in my own ventures and worked with global giants like Bosch & Siemens, I empower businesses to achieve similar efficiencies, saving hundreds of hours and significantly cutting costs. ——— Longer version ——— I'm a software engineer with a master's in economics and deep business expertise, specializing in Sales & Finance automation and all kinds of software integrations. Before automating entire departments (sales, finance, recruitment) in my own businesses and cutting costs by up to 70%, I led software development for companies ranging from small North American family businesses to global giants like Bosch & Siemens. This hands-on experience allows me to design solutions that are not just technically sound but strategically aligned with your business goals. I don't just "connect apps"; I create lean, reliable, and scalable systems built to grow with your team. I've developed a large library of automation blueprints that allow me to quickly adapt solutions for your exact needs. My Core Focus Areas: 📊 Optimizing CRM Data & Workflows: HubSpot migrations and integrations with finance and lead generation platforms; auto-triggered follow-up workflows based on stage or client behavior. 💰 Streamlining Financial Workflows: QuickBooks/XERO automation for invoicing, reconciliation, salary calculation, and payroll; API-based syncing with CRMs and payment systems. 🔗 Custom API Integrations: Syncing CRM data with finance, marketing, and operations tools. Multi-step processes with n8n that completely replace manual tasks. 🤖 AI for Operations: Implementing AI-backed email agents for enhanced productivity; virtual helpdesks; anomaly and error detection in financial data; automated transaction classification. 📈 Reporting & Dashboards: Automating reports and creating custom dashboards for real-time insights into cash flow and expenses. 🚦 "Human in the Loop" Flows: Adding approvals for sensitive operations to maintain control where needed. Looking to optimize your business processes? Let's connect and explore how we can transform your operations. 🚀

  • Java
  • JavaScript
  • Python
  • API Integration
  • Financial Report
  • Finance
  • Xero
  • QuickBooks Online
  • QuickBooks Online API
  • Intuit QuickBooks
  • API
  • Task Automation
  • Automation
  • CRM Automation
  • n8n
Yurii S.

Katowice, Poland

$113/hr
5.0
99 jobs

Hello there! My name is Yurii and I am a certified Google Cloud Architect and Engineer passionate in Cloud development and Java. I have more than 10 years of commercial enterprise development experience in Java working as a Senior Java Developer and leading a small but efficient team. During my career, I had developed multiple services and applications from desktop apps to huge standalone web applications and micro-service-based platforms for image processing, studying, etc. A brief summary of my expertise could be found below. Programming Languages: Java, JavaScript, TypeScript, Python Main Technologies: Java SE, Java EE, Spring, Hibernate, JSP, Servlets, AspectJ, AngularJS, Django, Flask Testing frameworks: JUnit, Mockito, Spock, Geb, Selenium, PowerMock IDE: Eclipse, NetBeans, IDEA Application servers: Tomcat, WebLogic, Glassfish, Jetty OS: Windows, UNIX DBMS: Oracle, Apache Derby, MySQL, SQLite Build Tools: Maven, Ant, ivy, gradle Version Control System: Subversion, git Management Tools: JIRA, Confluence, Gerrit, ZenHub, GitHub Additional skills: technical documentation writing, knowledge transferring CI/CD: Jenkins

  • Java
  • JavaScript
  • Python
  • DevOps
  • AWS Lambda
  • Google Cloud Platform
  • ETL Pipeline
  • Software Architecture & Design
  • API
  • Cloud Architecture
  • Cloud Computing
  • CI/CD
  • Solution Architecture Consultation
  • Cloud Engineering
Pawel K.

Warszawa, Poland

$45/hr
5.0
45 jobs

As a full stack developer, I have the biggest experience in Laravel 4/5, PHP 5/7, but also with a large range of technologies such as AngularJS, and React, which have proven to be critical complementary tools to my skill set and allowed me to bring many e-commerce projects to market. 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: PHP 8, Laravel - Frontend: React, SCSS, BEM - Code quality: Continuous Integration, Acceptance Tests, Unit testing with PHPUnit - Databases: MySQL, MongoDB, Oracle - Mobile integration: building APIs for mobile applications - Payment Integration: Pay-Pal, Payment Express, Stripe, CityPay - Version Control System: Git, GitLab - Issues Trackers: JIRA, Redmine, Trello, YouTrack, Asana - Others: AWS My approach: - always serious about the projects I am assigned to - communication is key - deadlines to be met - professional help and advice, whenever needed 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! Paweł, Polcode Dev Team

  • MySQL
  • AJAX
  • WordPress
  • Bootstrap
  • CSS
  • jQuery
  • AngularJS
  • Laravel
  • PHP
Piotr K.

Poznań, Poland

$30/hr
4.0
24 jobs

Over the last 15 years, I have developed a wide range of applications using Java technologies. Spring / Spring Boot, Hibernate JSP, JSF, Apache Wicket, Apache Struts HTML.CSS, JavaScript, jquery, mySql, postgreSQL, Oracle. My skills are confirmed by certifications: VMWare Spring Certified Profesional OCP (Oracle Certified Professional Java SE 17) SCJP (Sun Certified Java Programmer) SCWCD (Sun Certified Web Component Developer).

  • Jakarta Server Pages
  • JavaScript
  • Java
  • SQL Programming
  • Spring Framework
  • SQL
  • Apache Wicket
  • Java Servlet API
  • Hibernate
  • PostgreSQL Programming
  • Spring Boot
  • Spring Security

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