Fullstack Developer (Java / React)

Link Group; Warszawa; Hybrid; PLN 180,000 - 280,000; Full time

Job summary

Link Group in Warsaw is seeking an experienced Fullstack Developer to join a core engineering initiative for a leading wealthtech and fund distribution platform. You will balance backend and frontend development (approx.

50/50) using Java and React to build and scale complex applications. You will develop robust backend microservices with Java/Spring, design REST APIs, and collaborate with international teams.

Qualifications

• Mid-Senior level with proven Fullstack Developer experience on enterprise-scale systems.
• Strong proficiency in Java & Spring/Spring Boot.
• Fluent English for daily international collaboration.

Responsibilities

• Develop robust backend microservices and components using Java/Spring.
• Design, build, and integrate high-performance REST APIs.
• Collaborate with international teams on requirements and architecture.

Skills

Java & Spring

REST APIs

English language

Fullstack experience

Microservices

Tools

Docker

Kubernetes

Kafka

AWS

CI/CD

Job description

We are seeking an experienced Fullstack Developer to join a core engineering initiative for a leading global wealthtech and fund distribution platform. In this role, you will balance backend and frontend development (approx. 50/50 split) using Java and React to build and scale complex applications supporting global investment fund and asset management processes.

Key Responsibilities

• Develop robust backend microservices and application components using Java and Spring / Spring Boot.
• Design, build, and integrate high-performance REST APIs.
• Collaborate with international engineering teams on business and technical requirement analysis.
• Maintain, refactor, and enhance existing applications within a complex, service-oriented architecture.
• Troubleshoot, debug, and resolve technical issues across full-stack environments.

Candidate Profile

• Level of Experience: Mid-Senior level with a proven track record as a Fullstack Developer on enterprise-scale systems.
• Backend Stack: Strong proficiency in Java and the Spring / Spring Boot framework ecosystem.
• API & System Design: Good knowledge of REST API development and integration in complex application environments.
• Languages: Fluent English required for daily communication within an international project setup.

Nice to Have

• Practical experience with microservices architecture and event-driven messaging (e.g., Kafka).
• Knowledge of containerization and orchestration tools (Docker, Kubernetes).
• Exposure to CI/CD pipelines and public cloud platforms (AWS, Azure, or GCP).
• Prior background in financial services, investment banking, or asset management (specifically investment funds / ETFs).
• Employment Type: B2B Contract
• Location: Warsaw, Poland (Hybrid model: 2 days per week in-office)