Fullstack Developer

Detailed description of work task to be carried out

We are seeking an experienced Full Stack Developer Consultant to support the development of an API engine application that serves as a central integration hub for our Systems Development Lifecycle (SDLC) toolchain. This platform will gather, map, and synchronize identities and data across multiple development tools, enabling seamless interoperability and improved developer experience.

Primary Objectives: The consultant will work closely with a product manager/owner, and be responsible for designing, developing, and implementing a robust API engine that:

• Use internal framework for it's Internal Developer platform

• Aggregates data from disparate SDLC tools (e.g., Jira, Bitbucket, Jenkins/Bamboo, SonarQube, Artifactory, qTest, Helix)

• Manages the execution structure for the delivery pipeline of the unit/teams

• Maps and normalizes identities, entities, and relationships across different systems

• Provides a unified API layer for consuming integrated toolchain data - to be used for metrics and reporting

• Delivers an intuitive user interface for configuration, monitoring, and data visualization

Location: preferred Sweden - Stockholm or Poland - Warsaw, Tri-city (Gdansk/Gdynia)
Start date: 2026-07-01

End date: 2026-12-31

Must-have knowledge and experience

Functional API Engine: Fully operational API engine with connectors for specified SDLC tools
Identity Mapping System: Working identity and entity mapping functionality with configurable rules
React Frontend Application: Complete web interface for platform management and monitoring
Databases Schema: Optimized database structure with migration scripts
API Documentation: Comprehensive API documentation (Swagger specifications)
Technical Documentation: Architecture documentation, deployment guides, and operational runbooks
Test Suite: Automated test coverage for critical functionality
Backstage Integration: Custom plugins or integration components for Backstage platform
Source Code: Clean, version-controlled codebase with proper documentation

Nice-to-have knowledge and experience

Strong problem-solving and analytical skills
Excellent communication skills for technical and non-technical audiences