Persohap GmbH
We’re a fast-growing product company building an AI-powered platform used by thousands of teams every day. We’re looking for a Senior Backend Engineer to own critical services end-to-end — from design to production — and help us scale to the next order of magnitude. You’ll join a small, senior team where your decisions have real impact.
Tasks
– Design, build and operate scalable backend services (Python / FastAPI) and REST APIs.
– Model and optimize PostgreSQL schemas; write efficient async queries.
– Own services end-to-end: architecture, implementation, testing, deployment and monitoring.
– Integrate third-party APIs and internal microservices behind a gateway.
– Improve reliability, performance and security under high concurrency.
– Collaborate with product and frontend to ship features that matter.
– Mentor mid-level engineers and raise the bar on code quality.
Requirements
– 5+ years building production backend systems in Python.
– Strong experience with FastAPI (or Flask/Django) and async programming.
– Solid PostgreSQL skills: schema design, indexing, query optimization.
– Experience designing and scaling REST APIs and microservices.
– Comfortable with Docker, CI/CD and cloud (AWS preferred).
– Good understanding of auth (JWT/OAuth), caching and message queues.
– Clear written and spoken English; pragmatic, ownership mindset.
Nice to have: Kubernetes, SQLAlchemy, observability (Prometheus/Grafana), LLM/AI integrations
Benefits
– Competitive salary + equity.
– Remote-friendly with flexible hours.
– Top-tier hardware and a yearly learning budget.
– 30 days paid vacation.
– Small senior team, real ownership, fast decisions.
Skills: Python, FastAPI, PostgreSQL, Docker, AWS, REST APIs, Microservices, SQLAlchemy, CI/CD, Redis
If you like owning hard problems and shipping reliable systems at scale, we’d love to talk. The process is quick: a short AI video interview, then a technical conversation with the team. Apply today.
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Working in Berlin
Berlin is the capital of Germany as well as its largest city by both area and population. With 3.7 million inhabitants, it has the highest population within its city limits of any city in the European Union. The city is also one of the states of Germany, being the third-smallest state in the country by area. Berlin is surrounded by the state of Brandenburg, bordering Brandenburg's capital Potsdam to the southwest. The urban area of Berlin has a population of over 5 million, making it the most populous in Germany. The Berlin-Brandenburg capital region has around 6 million inhabitants and is Ger
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