Backend Engineer – API Integrationen, Connectoren, Worker/Jobs, Mailer Service, QA (m/w/d) – Remote – Freelancer
Core
Building resilient backend integrations, connectors, and worker services for a legal firm's client management and communication workflows.
Role type
Senior Backend Engineer (API Integrations & Connectors)
Builds
Connectors (Box, HubSpot, Microsoft Graph, Asana), queue-driven worker services, and a mailer service with PDF attachments.
Domain
Legal Technology / SaaS Integration
Required skills
Python, Node.js, Go, API Integration (OAuth, Webhooks, Pagination, Rate Limits), Database Design & Migration, Failure-Mode Thinking, Testing (Contract/Integration/E2E), Docker, Observability (via careerplan.io/jobs/2515483-backend-engineer-api-integrationen-connectoren-workerjobs-mailer-service-qa-mwd-remote-fre)
Preferred skills
Experience with Box API, HubSpot API, Microsoft Graph API, Asana API, Billing Systems
Technologies
Python, Node.js, Go, Postgres, Docker, Box, HubSpot, Microsoft Graph, Asana
Responsibilities
Develop and maintain API connectors for third-party services; Build stateful, replayable worker jobs; Implement mailer service with retry logic and deduplication; Write comprehensive QA tests including E2E regression; Ensure system resilience against rate limits and timeouts.
Seniority
Senior, hands-on IC
