Senior Java Developer

🏢 Summary: Senior Java Developer role focused on designing and owning high-performance backend systems for fintech and large-scale platforms. The position involves leading microservices architecture, optimizing performance and data consistency, and mentoring engineers in a full-time onsite setup in Warsaw. Strong emphasis on architectural decision-making, security, and reliability in production environments. 🗂️ Requirements: 5+ years commercial experience as Java Developer, Strong commercial experience with Java and Spring (Boot, Security, Data), Deep knowledge of Hibernate ORM and SQL databases, Strong understanding of JVM behavior, Experience designing scalable backend architectures, Proficiency with CI/CD pipelines, Proficiency with Git and Gradle, Experience with production debugging, Ability to work full-time onsite in Warsaw, Effective use of AI-assisted development tools (ChatGPT, Claude, Cursor, Grok), English level B2+ or higher 📃 Skills: Java, Spring, SpringBoot, SpringSecurity, SpringData, Hibernate, SQL, PostgreSQL, JVM, CI/CD, Git, Gradle, REST, SOLID, DDD, ChatGPT, Claude, Cursor, Grok 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B / Freelance About Silk Software House Silk Software House builds and maintains mission-critical backend systems for fintech, payments, and large-scale platforms. We value strong engineering judgment, ownership, and long-term cooperation over short-term delivery pressure. Your Role As a Senior Java Developer, you’ll take technical ownership of backend services, influence architectural decisions, and mentor other engineers. You’ll work directly on complex domains where performance, security, and reliability matter. Responsibilities Design and implement backend architectures using Java 11+ and Spring Lead development of microservices and APIs Optimize performance, scalability, and data consistency Work deeply with Hibernate , transactions, and database internals Review code, mentor developers, and set engineering standards Collaborate with DevOps on deployments and observability Requirements This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 5+ years of commercial experience as a Java Developer Strong commercial experience with Java & Spring (Boot, Security, Data) Deep knowledge of Hibernate ORM , SQL databases, and JVM behavior Experience designing scalable, maintainable backend architectures Proficiency with CI/CD, Git, Gradle, and production debugging Effective use of AI-assisted development tools ( ChatGPT, Claude, Cursor, Grok ) English at B2+ level Nice to Have Event-driven architecture (Kafka, queues) Cloud-native systems (AWS/GCP/Azure) Kubernetes, Docker, observability tools Experience in fintech or high-traffic systems Rates (B2B) 120–160 PLN / hour Recruitment Process Intro call (30 min) Senior-level technical interview Architecture & project discussion Offer Tech Stack Java: Advanced Spring Boot: Advanced Hibernate: Advanced PostgreSQL: Advanced Solid: Advanced DDD: Advanced REST API: Advanced

🏢 Summary: Offer for a Mid Java Developer to build and maintain scalable backend systems using Java and Spring Boot in a full-time onsite role. The position involves developing REST APIs and microservices, working with relational databases, and collaborating with cross-functional teams. The role focuses on clean, production-ready code and gradual ownership of system components. 🗂️ Requirements: 3–5 years commercial experience as Java Developer, Strong Java 11+ knowledge, Practical Spring Boot experience, Solid Hibernate ORM knowledge, Experience with SQL and relational databases, Experience with Git, Experience with Gradle or Maven, Experience with CI/CD pipelines, Ability to use AI development tools, English B2 or higher, Full-time onsite availability in Warsaw 📃 Skills: Java, Spring, SpringBoot, Hibernate, SQL, PostgreSQL, MySQL, Git, Gradle, Maven, CI/CD, REST, Microservices, DDD, Kafka, AWS, GCP, Azure, Docker, Kubernetes 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House Silk Software House is a Warsaw-based development company delivering high-quality fintech, e-commerce, and enterprise systems for long-term clients. We focus on clean architecture, pragmatic engineering, and building software that actually runs in production for years. Your Role As a Mid Java Developer, you’ll work on real-world backend systems used by thousands of users. You’ll develop and maintain scalable services, collaborate closely with senior engineers, and gradually take ownership of system components. Responsibilities -Develop and maintain backend services in Java (11+) using Spring Boot -Implement and evolve REST APIs and microservices -Work with relational databases ( PostgreSQL, MySQL ) and Hibernate -Write clean, testable, production-ready code -Collaborate with frontend, QA, and DevOps teams Requirements This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 3–5 years of commercial experience as a Java Developer Practical experience with Java and Spring Boot Solid understanding of Hibernate ORM and SQL databases Familiarity with Git, Gradle/Maven, CI/CD pipelines Ability to use modern AI dev tools effectively ( ChatGPT, Claude, Cursor, etc. ) English at B2 level or higher Nice to Have Kafka or event-driven systems Basic cloud experience (AWS, GCP, Azure) Docker, Kubernetes basics Rates (B2B) 90–120 PLN / hour Recruitment Process Intro call (30 min) Technical interview or short task Final fit & project discussion Offer Tech Stack Java: Regular Spring Boot: Regular Hibernate: Regular PostgreSQL: Regular Solid: Regular DDD: Regular REST API: Regular

🏢 Summary: Full-time onsite Senior PHP Developer role focused on end-to-end backend ownership, from requirements gathering and architecture to implementation and technical decision-making. The position involves building and maintaining business-critical PHP applications, APIs, CMS systems, and data exchange solutions. You will also collaborate with DevOps and mentor other developers while working closely with clients. 🗂️ Requirements: Full-time onsite work in Warsaw (near Metro Plac Wilsona), 5+ years commercial experience as PHP Developer, Very good knowledge of PHP 8.1+, Strong commercial experience with Symfony or Laravel, Deep understanding of relational databases (MySQL or PostgreSQL), Strong knowledge of OOP principles and design patterns, Experience with automated testing, Knowledge of application security and common vulnerabilities, Proficiency with Git and development workflows, Experience working in Agile teams, Ability to independently gather requirements and design technical solutions, Effective use of AI-assisted development tools, English level B2+ 📃 Skills: PHP, Symfony, Laravel, MySQL, PostgreSQL, OOP, Git, Agile, Testing, Security, ChatGPT, Claude, Cursor 🏢 Description: Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House Silk Software House builds and maintains business-critical backend and web systems for fintech, payments, and large-scale platforms. We value ownership, strong engineering judgment, and the ability to design solutions, not just implement tickets. Your Role As a Senior PHP Developer, you’ll take ownership of backend solutions end-to-end: from gathering requirements, through architecture and implementation, to explaining and defending technical decisions. You’ll work closely with clients and mentor other developers. Responsibilities Design and develop PHP applications from scratch Gather requirements and propose well-reasoned technical solutions Design and maintain APIs, internal services, and data exchange systems Design and implement CMS systems Create new modules and evolve existing systems Make architectural decisions and evaluate alternatives Review code and support less experienced developers Collaborate with DevOps on deployment, CI/CD, and monitoring Requirement This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 5+ years of commercial experience as a PHP Developer Very good knowledge of PHP 8.1+ Strong commercial experience with Symfony or Laravel Deep understanding of relational databases (MySQL/PostgreSQL) Strong knowledge of OOP principles, design patterns, and coding standards Experience with automated testing and testing concepts Good understanding of application security and common vulnerabilities Solid understanding of Git and software development workflows Experience working in a team using Agile methodologies Ability to independently gather requirements, design solutions, and justify decisions Effective use of AI-assisted development tools ( ChatGPT, Claude, Cursor, etc. ) English at B2+ level Nice to Have Docker and containerized environments CI/CD pipelines (GitLab or GitHub) Monitoring and observability tools Experience in fintech or high-traffic systems Basic frontend knowledge (HTML, CSS, JS) Rates (B2B) 110–140 PLN / hour Recruitment Process Intro call (30 min) Senior-level technical interview Architecture & decision-making discussion Offer

🏢 Summary: Senior Frontend Developer role focused on designing and owning frontend architecture for complex web applications in fintech and enterprise domains. The position involves building advanced React applications with TypeScript, making architectural decisions, and ensuring high performance, security, and code quality. Full-time onsite work in Warsaw with strong collaboration across backend and product teams. 🗂️ Requirements: Full-time onsite availability in Warsaw, 5+ years professional programming experience, Strong commercial experience with React, Excellent knowledge of TypeScript, Deep understanding of React state management and rendering, Very good knowledge of HTML5 and CSS3, Strong experience with TailwindCSS, Experience designing frontend architectures, Experience integrating REST or GraphQL APIs, Knowledge of authentication and authorization flows, Understanding of frontend security and performance optimization, Experience diagnosing performance and rendering issues, Proficiency with Git and professional workflows, Experience working in Agile teams, Ability to use AI-assisted development tools, English level B2+ 📃 Skills: React, TypeScript, HTML5, CSS3, TailwindCSS, REST, GraphQL, Git, Agile, Next.js, WCAG, CICD, Storybook, i18n, Authentication, Authorization, Security, Performance 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona)💼 B2B About Silk Software House Silk Software House builds and maintains business-critical web applications for fintech, payments, and enterprise clients. We value ownership, strong technical judgment, and developers who can design solutions, not just implement tasks. Your Role As a Senior Frontend Developer, you’ll take responsibility for frontend architecture, make key technical decisions, and ensure long-term code quality and performance. You’ll collaborate closely with backend teams and help shape how frontend systems are built and evolved. Responsibilities Design and build frontend architecture for web applications Develop complex React applications using TypeScript Make and justify architectural and technical decisions Optimize performance, rendering, and user experience Define and enforce frontend best practices and coding standards Integrate frontend systems with REST / GraphQL APIs Review code and support less experienced developers Collaborate with architects, backend developers, and product stakeholders Support existing projects through modernization and optimization Requirements This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 5+ years of professional programming experience , including strong React experience Excellent knowledge of TypeScript Deep understanding of React , state management, and rendering behavior Very good knowledge of HTML5, CSS3 , and responsive design Strong experience with TailwindCSS Solid understanding of authentication and authorization flows Good knowledge of frontend security and performance optimization Experience designing and building frontend architectures Experience diagnosing complex performance and rendering issues Familiarity with Git and professional development workflows Experience working in teams using Agile methodologies Ability to use AI-assisted development tools effectively English at B2+ level , enabling smooth communication Nice to Have Next.js Accessibility standards ( WCAG ) E2E testing frameworks CI/CD pipelines Storybook i18n support in production applications Rates (B2B) 110–140 PLN / hour Recruitment Process Intro call (30 min) Senior-level technical interview Architecture & decision-making discussion Offer

🏢 Summary: Onsite Fullstack Developer role focused on building scalable, production-ready web applications using Java Spring and Node.js on the backend and React on the frontend. The position involves developing REST APIs, integrations, and high-performance systems with relational databases, contributing to architecture and technical decisions. Work is 100% onsite in Warsaw under a B2B contract. 🗂️ Requirements: Ability to work 100% onsite in Warsaw, Commercial experience with Java, Commercial experience with Spring Boot, Commercial experience with Node.js, Experience with React, Experience with TypeScript, Knowledge of PostgreSQL, Knowledge of MySQL, Knowledge of MariaDB, Experience building production applications, Understanding of REST APIs, Understanding of backend architecture, English B2 level or higher 📃 Skills: Java, Spring, SpringBoot, Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MySQL, MariaDB, REST, Git, Docker, CI/CD 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House We build modern, scalable applications with fintech-grade reliability and strong backend architecture. Our projects focus on high-performance web platforms and integrations using Java Spring and Node.js ecosystems. Your Role As a Fullstack Developer, you’ll primarily work with Java Spring and Node.js on the backend, and React on the frontend. You’ll collaborate closely with backend and frontend engineers to deliver scalable production-ready applications. Responsibilities Develop backend services using Java / Spring Boot and Node.js (NestJS / Express) Build frontend applications with React / Next.js + TypeScript Design and maintain REST APIs and integrations Work with relational databases including PostgreSQL, MySQL, and MariaDB Collaborate with designers, backend developers, and product teams Participate in architecture and technical decision-making Maintain and improve production applications Requirements Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Commercial experience with Java / Spring Boot, Node.js backend development Experience with React + TypeScript Good knowledge of relational databases (PostgreSQL, MySQL, MariaDB) Experience building and maintaining production applications Understanding of API integrations and backend architecture English at least B2 level Nice to have Experience with microservices architecture Cloud deployment experience CI/CD knowledge Docker and containerization experience Experience with scalable backend systems Tech Stack Area: Technologies Backend: Java Spring Boot, Node.js, NestJS, Express Frontend: React, Next.js, TypeScript Databases: PostgreSQL, MySQL, MariaDB DevOps: Docker, CI/CD Tools: Git, REST APIs Recruitment Process 1. Intro Call – Quick chat about your experience, expectations, and our projects 2. Technical Interview / Task – Backend and frontend discussion focused on Java Spring, Node.js, and React 3. Final Meeting – team fit and project discussion 4. Fast feedback after each stage within a few days. 5. Process usually takes 2–3 weeks .

🏢 Summary: Fullstack Developer role focused on building and maintaining production-grade backend services in Node.js (NestJS/Express) and frontend applications in React/Next.js with TypeScript. The position involves working with databases and APIs to deliver long-term fintech, e-commerce, and enterprise systems. Onsite work in Warsaw with a strong emphasis on backend expertise and production experience. 🗂️ Requirements: Strong backend skills in Node.js and NestJS, Minimum 5 years of experience in backend development, Minimum 2 years of experience maintaining production applications, Solid frontend skills in React and TypeScript, Experience with database integration, Experience with API integration, Experience mentoring mid or junior developers, Ability to work 100% onsite in Warsaw 📃 Skills: Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MongoDB, APIs, Microservices, Cloud 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House We build modern, scalable applications with fintech-grade reliability and strong backend architecture. Our projects focus on high-performance web platforms and integrations using Java Spring and Node.js ecosystems. Your Role As a Fullstack Developer, you’ll primarily work with Node.js on the backend, React on the frontend, sometimes also with Next.js Responsibilities Develop backend services with Node.js (NestJS/Express) * Build frontend apps with React/Next.js + TypeScript * Work with databases (PostgreSQL, MongoDB) and APIs Collaborate with design and backend teams Requirements Strong backend skills in Node.js/NestJS At least 5 years of experience in backend applications At least 2 years of experience in maintaining production applications Solid frontend skills in React + TypeScript Database and API integration knowledge Experience mentoring mid/junior developers Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Nice-to-have Microservices and cloud deployment experience Rates (B2B/Freelance) Senior: 120 - 180 PLN/h Recruitment Process 1. Intro Call (30 min) – Quick chat about your experience, expectations, and our projects. 2. Technical Interview / Task – Backend (Node.js) and frontend (React) focus. 3. Final Meeting – Culture/fit + project discussion. 4. Offer – Fast decision if it’s a match. 5. Process usually takes 2–3 weeks . 6. Feedback after each stage within a few days

🏢 Summary: Mid PHP Developer role focused on building and maintaining web applications, REST APIs, and backend services using modern PHP frameworks. The position involves developing new modules, integrating systems, and ensuring production-ready, testable code within an onsite team environment. This is a full-time B2B role based in Warsaw. 🗂️ Requirements: 3–5 years of commercial experience in PHP projects, Very good knowledge of PHP 8+, Practical experience with Symfony or Laravel, Good knowledge of MySQL or PostgreSQL, Understanding of object-oriented programming, Knowledge of design patterns, Ability to write automated tests, Knowledge of application security fundamentals, Familiarity with Git, Understanding of CI/CD concepts, Basic understanding of Docker, Full-time onsite availability in Warsaw 📃 Skills: PHP, Symfony, Laravel, MySQL, PostgreSQL, REST, OOP, DesignPatterns, Git, CI/CD, Docker, Security, Testing 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona)💼 B2B About Silk Software House Silk Software House is a Warsaw-based development company delivering high-quality fintech, e-commerce, and enterprise systems for long-term clients. We focus on clean architecture, pragmatic engineering, and building software that runs reliably in production. Your Role As a Mid PHP Developer, you’ll work on existing and new web applications, APIs, and internal systems. You’ll implement features, collaborate with the team, and grow toward greater ownership of system components. Responsibilities Develop and maintain web applications and backend services in PHP Work with Symfony or Laravel frameworks Design and maintain REST APIs and system integrations Implement new modules for existing systems Work with relational databases ( MySQL, PostgreSQL ) Write clean, testable, production-ready code Collaborate with frontend, QA, and DevOps teams Requirements This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 3–5 years of commercial experience in PHP projects Very good knowledge of PHP (8+) Practical experience with Symfony or Laravel Good knowledge of relational databases ( MySQL/PostgreSQL ) Understanding of object-oriented programming and design patterns Ability to write automated tests General knowledge of application security (common threats and protections) Familiarity with Git and basic CI/CD concepts Basic understanding of Docker (what it is and how it’s used) English at B2 level or higher Nice to Have Experience with CMS systems Basic frontend knowledge (HTML, CSS, JS) Monitoring basics (what to log, what not to log) Experience with GitLab or GitHub CI/CD pipelines Rates (B2B) 80–110 PLN / hour Recruitment Process Intro call (30 min) Technical interview or short task Final fit & project discussion Offer

🏢 Summary: Full-time onsite Mid Frontend Developer role focused on building and maintaining modern web applications using React. The position involves translating Figma designs into pixel-perfect, responsive interfaces and integrating with REST/GraphQL APIs. You will collaborate with backend teams to deliver secure, high-performance frontend solutions. 🗂️ Requirements: Full-time onsite work in Warsaw (near Metro Plac Wilsona), 2–4 years commercial experience with React, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Very good knowledge of HTML5, Very good knowledge of CSS3, Practical experience with TailwindCSS, Experience with state management patterns, Understanding of frontend security basics, Experience testing React components, Familiarity with Git workflows, Basic knowledge of Docker, Ability to use AI tools in development, English level B2+ 📃 Skills: React, JavaScript, TypeScript, HTML5, CSS3, TailwindCSS, REST, GraphQL, Git, Docker, Figma, WCAG, Next.js, Storybook, CI/CD, i18n 🏢 Description: Warsaw (Onsite – near Metro Plac Wilsona)💼 B2B About Silk Software House Silk Software House is a Warsaw-based development company delivering high-quality fintech, e-commerce, and enterprise systems for long-term clients. We focus on clean architecture, pragmatic engineering, and software that performs well in production. Your Role As a Mid Frontend Developer, you’ll design and implement modern web applications using React. You’ll work closely with backend developers and designers, translate Figma designs into pixel-perfect UI, and help maintain and evolve existing products. Responsibilities Design and implement modern web applications using React Build responsive, pixel-perfect UI based on Figma designs Integrate frontend applications with REST / GraphQL APIs Implement authentication and authorization flows Maintain and optimize existing frontend codebases Diagnose performance and rendering issues Collaborate with system architects, backend developers, and other stakeholders Ensure code quality, performance, and maintainability Requirements This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station 2–4 years of commercial experience with modern React Strong knowledge of JavaScript and TypeScript Very good understanding of HTML5 and CSS3 Practical experience with TailwindCSS Experience with common state management patterns Good understanding of frontend security basics Basic experience with testing React components Familiarity with Git and standard development workflows Basic understanding of Docker Ability to use AI tools as part of the development workflow English at B2+ level with good communication skills Nice to Have Internationalization ( i18n ) E2E tests CI/CD pipelines Accessibility standards ( WCAG ) Experience with Next.js Storybook Rates (B2B) 80–110 PLN / hour Recruitment Process Intro call (30 min) Technical interview or short task Final fit & project discussion Offer

🏢 Summary: Senior Backend Java Developer role focused on designing and building scalable, high-performance backend systems using Java and Spring Boot in a cloud-native environment. The position involves developing enterprise-grade solutions, ensuring performance and security, and supporting containerized deployments. The role requires strong experience with modern backend technologies and infrastructure tools. 🗂️ Requirements: 8+ years of backend development experience, Strong experience with Java 17+, Strong experience with Spring and Spring Boot, Experience with Spring Security, Experience with SQL databases, Experience with Maven, Experience with Git and CI/CD pipelines, Experience with testing frameworks (JUnit, AssertJ, Hamcrest), Experience with Kubernetes and Helm, Experience with Bash or Shell scripting, Experience with cloud-native applications, Experience in enterprise environments 📃 Skills: Java, Spring, SpringBoot, SpringSecurity, SQL, Maven, Git, CICD, JUnit, AssertJ, Hamcrest, Kubernetes, Helm, Bash, Shell, Docker, PostgreSQL 🏢 Description: Senior Backend Java Developer Location: Warsaw, Poland (hybrid – 2 days/week in the office) About the Role We’re looking for a Senior Backend Java Developer to design and build scalable, high-performance backend systems for international products. You’ll work in a collaborative environment, contribute to architectural decisions, and mentor other engineers. Responsibilities Design, develop, and maintain backend systems using Java 17+ and Spring Boot Ensure scalability, performance, and security of solutions Work with SQL databases (e.g. PostgreSQL) Support deployments using Docker, Kubernetes, and Helm Use Bash/Shell for automation and integration tasks Lead technical discussions and mentor team members Collaborate in Agile (Scrum) teams and communicate in English Requirements Strong experience with Java 17+, Spring / Spring Boot / Spring Security Experience with cloud-native applications Maven, SQL, Git (GitHub, CI/CD) Testing frameworks (JUnit, AssertJ, Hamcrest) Kubernetes, Helm Bash/Shell scripting English B2/C1 Experience in enterprise environments 8+ years of backend development experience Nice to Have PostgreSQL, Hibernate/JPA Kafka, event-driven architecture Microservices architecture Python Knowledge of C or Go CI/CD tools, JIRA Monitoring tools (Grafana, Prometheus, Kibana) Security best practices (OWASP) Qualifications Degree in Computer Science or related field

🏢 Summary: B2B contract role for a Senior Java Developer focused on designing and maintaining scalable backend systems and APIs across diverse software projects, including AI-driven and legacy modernization initiatives. The position involves architectural input, code quality improvements, and deployment support in cloud environments within Agile teams. 🗂️ Requirements: Minimum 5 years of experience as a Java Developer, Commercial experience with Spring Boot or Hibernate, Strong knowledge of object-oriented programming and design patterns, Experience building and integrating RESTful APIs, Experience with SQL and NoSQL databases, Experience with cloud platforms (AWS, Azure, or GCP), Knowledge of CI/CD pipelines and version control systems, Experience working in Agile/Scrum teams, English proficiency at B2 level or higher, Experience with AI technologies or AI-powered solutions 📃 Skills: Java, Spring, SpringBoot, Hibernate, REST, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, GCP, CI/CD, Git, OOP, Scrum, AI 🏢 Description: About position: We are currently building our talent pool for future Senior Java Developer roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. We're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems, what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. TL;DR • Who : Senior Java Developer • Contract Type : B2B Framework Agreement. • Salary range: Up to 150 PLN/h • Company : Software House What you’ll be doing: Designing, implementing, and maintaining high-quality Java applications. Developing backend components and APIs to support scalable software solutions. Collaborating with cross-functional teams. Reviewing and refactoring code to ensure maintainability, performance, and security. Participating in technical design discussions and contributing to architecture decisions. Writing and maintaining technical documentation for systems, APIs, and processes. Supporting deployment and integration of applications in different environments. You will be the best fit if you have: 5 years of experience as a Java developer, preferably with exposure to Spring Boot, Hibernate, or similar frameworks. Strong understanding of object-oriented programming, design patterns, and clean code principles. Experience with RESTful APIs and web services integration. Familiarity with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB). Experience with cloud environments such as AWS, Azure, or GCP. Knowledge of CI/CD pipelines and version control systems (e.g., Git). Strong problem-solving skills and ability to troubleshoot complex issues. English level B2 or higher. Experience working in Agile/Scrum teams and contributing to iterative development. Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer : Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 Hybrid and flexible cooperation model based on a B2B Framework Agreement. Great working conditions and best equipment: Dell or MacBook, your choose. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited about debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.