Senior Fullstack Developer(Java, TS, Node.js)

Location: Warsaw, Poland (hybrid model)
Employment Type: b2b
Project Duration: long-term
Experience Level: 6+ years

Overview
We are looking for a Senior Fullstack Developer with strong hands-on experience across both backend and frontend. The role requires deep expertise in modern Java, microservices architecture, and solid frontend development skills.

Key Requirements

• Strong commercial experience as a Fullstack Developer (backend-only profiles are not considered)
• Senior-level engineer with a hands-on approach (not a managerial role)
• Proven track record working on large-scale systems
• Excellent English communication skills

Backend & Architecture

• Strong experience with Java (versions 17–21, modern approach)
• Solid knowledge of Spring Boot 3.x and microservices architecture
• Hands-on experience with Kafka (event-driven systems)
• Strong SQL skills, especially with Oracle
• Experience with Redis or similar technologies
• Understanding of Domain-Driven Design (DDD)

Frontend

• Experience with Node.js and TypeScript
• Solid experience with Angular (SPA development)
• Strong understanding of frontend architecture and best practices
• Experience building and maintaining Single Page Applications
• Webpack (nice to have)

Security

• Good understanding of web application security principles
• Practical experience with OAuth2 and OIDC
• Familiarity with identity management solutions (nice to have)
• Awareness of OWASP standards

DevOps & Tooling

• Git (required)
• Kafka (required)
• CI/CD: GitLab CI (required), Jenkins (nice to have)
• Maven (nice to have)
• Docker and Kubernetes (nice to have)
• Tools: IntelliJ, VS Code
• Jira and Confluence – working experience

Additional Nice to Have

• Python
• Experience with AI-assisted development tools

Methodologies

• Agile (Scrum, Kanban)
• DevOps mindset
• Experience working in distributed international teams

Soft Skills

• Strong communication and teamwork skills
• Analytical thinking and problem-solving ability
• Proactive and results-oriented mindset
• Ability to work independently on complex tasks
• Continuous learning attitude

Tech Stack
Java (17–21), Spring Boot, Microservices, Kafka, DDD, Node.js

Responsibilities

• Design, develop, and maintain scalable fullstack applications
• Build and enhance microservices-based architecture
• Contribute to frontend development using modern frameworks
• Ensure high code quality, performance, and security
• Collaborate with cross-functional teams in an Agile environment
• Participate in code reviews and technical discussions
• Take ownership of features from concept to delivery