Berlin Tech Job
Frontend Engineer (m/w/d) at OpenSynergy GmbH
OpenSynergy GmbH is hiring for a full-time frontend role in Berlin, Germany. Review the role details, skills, seniority, and company links before applying.
FrontendOn-siteFull-timeMid-Level
Role details
Company
OpenSynergy GmbH
Location
Berlin, Germany
Work mode
On-site
Posted
10 July 2026
About this role
Your mission
- Design and build the production frontend: React + TypeScript
- Build data-heavy UI: fleet maps, telemetry charts, real-time status views
- Extend the Go REST API when the frontend needs new endpoints: CRUD handlers, OpenAPI, integration tests
- Own frontend quality: type safety, performance on large datasets, CI checks on every PR
- Contribute to shared engineering practice: architecture, docs, PR reviews
- 3+ years building production single-page applications with React and TypeScript
- Solid grasp of client-state vs. server-state management and when each applies
- Comfort working across the stack: you can add a REST endpoint, write its tests, and consume it
- Ability to design/optimize SQL database schemas
- Go experience
- Fluency with modern web dev tooling
- Data visualization experience (charts, maps, dashboards over time-series data)
- OpenTelemetry or observability-domain background; ClickHouse or another OLAP store
- Profession with modern automation testing tools with different test types unit, integration, e2e
- Docker-based local development
Skills mentioned
TypeScriptReactDockerRESTSQL