April 8, 2026
Senior Java Developer
Senior • Hybrid
5,900 - 6,200 USD
Warsaw, Poland
Overview
We are a company leveraging AI to optimize business operations. Our mission is to provide digital solutions and consulting services that help companies grow and create value. By using modern technology, we simplify processes, increase efficiency, and discover new revenue opportunities—especially in private capital markets.
Our ecosystem includes:
PaaS (Platform as a Service): A core platform that enhances workflows, provides actionable insights, and supports value creation.
SaaS (Software as a Service): A cloud platform offering robust performance and intelligent tools at scale.
S&C (Solutions & Consulting): Flexible tools and methodologies to manage, grow, and improve company performance.
With over 10 years of experience working with fast-growing companies and private equity businesses, we know how to harness technology to deliver tangible business advantages.
Job Description
We are looking for a Backend-Focused Full Stack Developer with strong Java expertise. While your main focus will be backend systems, experience with modern frontend technologies (React.js, TypeScript) is a valuable plus.
You will join an Agile team to design, build, and maintain scalable, secure, and high-performing applications.
Key Responsibilities
Backend Development (Primary Focus)
Develop and maintain REST APIs and microservices using Java (Spring Boot, Hibernate, JPA).
Implement secure authentication, authorization, and data handling mechanisms.
Design and optimize databases (PostgreSQL, MySQL, MongoDB) for performance and reliability.
Integrate with third-party APIs, cloud services, and internal systems.
Participate in deployment pipelines using CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD) and containerization (Docker, Kubernetes).
Frontend Development (Nice-to-Have)
Build responsive UI components using React.js, Redux, and modern JavaScript/TypeScript.
Apply best practices in UI/UX design, performance optimization, and cross-browser compatibility.
Work with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS.
Code Quality & Testing
Write clean, maintainable, and well-documented code.
Create unit and integration tests for backend services, and frontend components if applicable.
Collaboration & Agile Development
Collaborate with designers, product managers, and DevOps engineers.
Participate in Agile/Scrum ceremonies and contribute to process improvement initiatives.
Required Skills & Experience
Backend
Strong proficiency in Java, Spring Boot, Hibernate, JPA, and REST API development.
Experience with microservices architecture and API Gateway.
Knowledge of authentication/authorization protocols: OAuth2, JWT, sessions.
Frontend (Optional / Nice-to-Have)
Experience with React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript.
Understanding of state management and component-based design.
Familiarity with UI libraries/frameworks: Material-UI, Bootstrap, or Tailwind CSS.
Database & DevOps
SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis).
CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD).
Cloud platform experience (AWS, Azure, GCP) and containerization (Docker/Kubernetes).
Qualifications
Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
5+ years of experience as a Full Stack or Backend Developer (Java-focused).
Experience working in Agile teams.
Strong problem-solving and analytical skills.
Soft Skills
Excellent communication and teamwork abilities.
Ability to manage multiple tasks in a fast-paced environment.
Eagerness to learn new technologies and improve processes.
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The ideal candidate will have substantial hands-on experience developing scalable applications, strong exposure to cloud-native architectures, and a solid understanding of capital markets—particularly in credit risk and market risk domains. Experience with Python (pyspark) for data-driven workflows and a strong command of CI/CD, microservices, and event-driven architectures is essential. ________________________________________ Key Responsibilities • Design, develop, and maintain full stack applications using React, C#.NET Core, and supporting technologies. • Build high-performance backend services, RESTful APIs, and microservices with focus on scalability, maintainability, and resilience. • Develop responsive, modular, and accessible UI components using React and modern JS/TS patterns. • Collaborate closely with business stakeholders and risk domain experts to deliver solutions in credit risk, market risk, and related capital markets functions. • Work with Python (pyspark) for data transformation, data pipelines, and analytics workflows. • Develop, optimize, and maintain Power BI dashboards, data models, and analytical reports for business users. • Implement and optimize CI/CD pipelines, ensuring robust automated testing, deployment, and monitoring. • Architect and contribute to event-driven and distributed system designs using technologies such as Kafka, Event Hub, or similar. • Drive engineering best practices: code reviews, unit/integration testing, performance tuning, documentation. • Contribute to cloud migration and modernization initiatives, especially in Azure or AWS environments. • Mentor junior developers and collaborate within a cross-functional agile team. ________________________________________ Required Skills & Experience Technical Skills • 10+ years of professional software development experience. • Front-end: o Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, hooks, and modern UI patterns. • Back-end: o Expertise in C# .NET Core, C#, REST APIs, Web APIs, and microservices-based development. • Python (pyspark): o Hands-on experience with distributed data processing, data pipelines, and analytic transformations. • Power BI: o Extensive experience developing dashboards, data models, DAX calculations, and enterprise-grade BI solutions. o Strong understanding of data modeling, performance tuning, and governance in Power BI. • Architecture: o Strong knowledge of microservices, API design, event-driven architectures, and distributed systems. • DevOps / CI/CD: o Experience with Azure DevOps, GitHub Actions, Jenkins, or similar. o Strong understanding of automated builds, testing, deployment, and monitoring. • Cloud Platforms: o Experience with Azure or AWS (Azure preferred). • Databases: o Proficiency with SQL Server, PostgreSQL, or other relational databases; NoSQL knowledge a plus. • Containerization: o Experience with Docker, Kubernetes, container orchestration. Domain Knowledge • Understanding of capital markets, specifically: o Credit risk (PD, LGD, EAD, credit exposure modeling, counterparty risk). o Market risk (VaR, sensitivities, stress testing, pricing concepts). • Familiarity with regulatory frameworks (e.g., Basel, FRTB, IFRS9) is a strong advantage. ________________________________________ Soft Skills • Strong analytical and problem solving abilities. • Excellent communication skills and ability to interact with technical and non-technical stakeholders. • Collaborative, agile mindset with experience in Scrum/Agile environments. • Ability to work independently and lead technical solutions end to end.
Technology
Link Group
Senior Full Stack Software Engineer
Senior
Hybrid
Warsaw, Poland
30,000 - 40,000 PLN
🏢 Summary: The offer is for a Full Stack Software Engineer to design and develop scalable backend services, RESTful APIs, and modern frontend applications using TypeScript and React or Angular. The role involves working with Python, PostgreSQL, and AWS-based cloud environments to deliver reliable, high-performance solutions. It also includes contributing to CI/CD pipelines and cloud-native infrastructure setup. 🗂️ Requirements: Strong experience with TypeScript, Proficiency in React or Angular, Backend and RESTful API development experience, Experience with Python, Knowledge of relational databases, Experience with PostgreSQL, Experience with AWS cloud services, Ability to work across the full stack, Experience with CI/CD pipelines, Experience with cloud infrastructure setup 📃 Skills: TypeScript, React, Angular, Python, REST, PostgreSQL, AWS, CI/CD, Kubernetes, Docker 🏢 Description: Do you enjoy building polished, user-friendly applications while working across the full stack? We are looking for a talented Full Stack Software Engineer to design and develop scalable backend services, RESTful APIs, and modern frontend applications using TypeScript and React or Angular. You’ll also get to leverage Python for backend scripting and work with cloud-native systems to deliver solutions that make a real impact. What You’ll Do: Build and maintain RESTful APIs and backend services in a cloud environment. Develop responsive frontend applications using React/TypeScript or Angular. Work with relational databases (PostgreSQL) and integrate multiple data sources. Ensure applications are reliable, scalable, and performant. Collaborate with stakeholders to translate requirements into high-quality technical solutions. Contribute to CI/CD pipelines, deployment automation, and cloud infrastructure setup. Must Haves: Strong experience with TypeScript and React or Angular Backend/API development experience and familiarity with Python Knowledge of relational databases and cloud-based systems (AWS preferred) Ability to work across the full stack and take ownership of solutions Nice to Haves: Experience with distributed systems or service-oriented architectures Familiarity with containers, Kubernetes, and cloud-native deployment patterns Exposure to data-intensive or analytics-driven applications
Technology
Link Group
Senior Full Stack Software Engineer
Senior
Hybrid
Warsaw, Poland
30,000 - 40,000 USD
🏢 Summary: Full Stack Software Engineer role focused on building scalable backend services and RESTful APIs while developing modern frontend applications using TypeScript and React or Angular in a cloud environment. The position involves working across the full stack, leveraging Python, PostgreSQL, and AWS to deliver reliable, high-performance solutions. You will contribute to CI/CD pipelines and cloud infrastructure setup to support scalable deployments. 🗂️ Requirements: Strong experience with TypeScript, Strong experience with React or Angular, Backend and RESTful API development experience, Experience with Python, Knowledge of relational databases, Experience with cloud-based systems, Ability to work across the full stack 📃 Skills: TypeScript, React, Angular, Python, REST, PostgreSQL, AWS, CI/CD, Kubernetes, Docker 🏢 Description: Do you enjoy building polished, user-friendly applications while working across the full stack? We are looking for a talented Full Stack Software Engineer to design and develop scalable backend services, RESTful APIs, and modern frontend applications using TypeScript and React or Angular. You’ll also get to leverage Python for backend scripting and work with cloud-native systems to deliver solutions that make a real impact. What You’ll Do: Build and maintain RESTful APIs and backend services in a cloud environment. Develop responsive frontend applications using React/TypeScript or Angular. Work with relational databases (PostgreSQL) and integrate multiple data sources. Ensure applications are reliable, scalable, and performant. Collaborate with stakeholders to translate requirements into high-quality technical solutions. Contribute to CI/CD pipelines, deployment automation, and cloud infrastructure setup. Must Haves: Strong experience with TypeScript and React or Angular Backend/API development experience and familiarity with Python Knowledge of relational databases and cloud-based systems (AWS preferred) Ability to work across the full stack and take ownership of solutions Nice to Haves: Experience with distributed systems or service-oriented architectures Familiarity with containers, Kubernetes, and cloud-native deployment patterns Exposure to data-intensive or analytics-driven applications