Freelance Data Engineer (Postgres / Systemintegration)
Juni Technology · Data · 18d ago
Open to candidates across EU.
Applies on the original listing · via Himalayas
Who can apply
Read straight from the listing, so you know before you spend time on it.
Open to candidates across EU.
“Berlin oder Remote innerhalb der EU.”
Team based in Berlin with remote work open across the European Union.
- Async-first
- Work is predominantly asynchronous with written documentation, though onboarding involves live discussions.
- Contractor / B2B
- Offered as an initial three-month freelance contract.
- Global stipend
- No home office or equipment budget mentioned.
- Annual retreat
- No company-paid get-togethers mentioned.
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About the role
In this freelance role, you will build and maintain the bidirectional integration layer connecting JUNI's SaaS operational tools (CRM, newsletter, forms, coworking, applications, etc.) with their core PostgreSQL database. You will refine the data model, implement identity resolution across multiple inbound sources, handle conflict resolution, and ensure data integrity using PostgreSQL features such as plpgsql, triggers, constraints, and RLS. The role focuses entirely on backend pipelines and data architecture with no frontend responsibilities.
What you'll do
- Design and build inbound and outbound data pipelines connecting multiple SaaS tools to a central PostgreSQL database
- Implement identity resolution to consolidate cross-platform records into unified person and organization profiles
- Handle complex bidirectional data synchronization, loop prevention, and conflict resolution
- Write and enforce data rules directly in PostgreSQL using plpgsql functions, triggers, constraints, and row-level security
- Stream KPI data to a business intelligence platform and expose data for natural-language search
- Document architectural decisions in writing and manage migrations via Git pull requests
What you bring
- Extensive experience integrating third-party APIs and webhooks handling retries, rate limits, pagination, and undocumented schemas
- Strong proficiency in bidirectional system synchronization and loop prevention
- Deep expertise using PostgreSQL as an application database, including plpgsql functions, triggers, constraints, and RLS
- Commitment to idempotency and clean Git-based deployment workflows
- Working knowledge of handling personal data in compliance with GDPR
- Proficiency in written English for documentation and asynchronous communication
About Juni Technology
JUNI is a non-profit ecosystem based in Berlin supporting science and spin-offs through programmatic offerings.
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