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I will build python microservices backend with fastapi, kafka and postgresql
Vladyslav
Über diesen Service
Senior Python backend engineer specializing in event-driven microservices: FastAPI, async SQLAlchemy, PostgreSQL, Kafka, Alembic, Pydantic v2.
Built to survive growth, concurrent load and third-party failures while staying predictable and maintainable for the next engineer.
What I build and ship in production:
- Domain-driven structure: service, repository, use cases and thin handlers. One class, one responsibility.
- Kafka pipeline: request, poll, retry and response queues, consumer and producer setup, at-least-once delivery.
- Outbox pattern: DB transaction first, external API call second, no lost operations on network failure.
- Idempotency: unique constraints plus duplicate detection, so redelivery never corrupts data.
- Typed contracts: Pydantic v2 schemas everywhere, no raw dicts.
- Error handling as architecture: domain exception hierarchy, explicit catch, retry and log rules.
- Event history table for audits and debugging.
Right fit if you need microservices from scratch, Kafka added to an existing Python monolith, or a reliable integration with payments, banking or logistics APIs.
Result: an architecture any mid or senior developer can pick up after me.
Lerne Vladyslav kennen
Vladyslav
Senior Python Backend Developer
- AusUkraine
- Mitglied seitApr. 2023
- Letzte Lieferung2 Jahre
Sprachen
Russisch, Ukrainisch, Englisch
Senior Python backend developer with 5+ years in production systems: FastAPI, Django, PostgreSQL, async SQLAlchemy, Kafka, Docker. I design event-driven microservices and clean, testable architectures that handle real money and real load, and I build fast, reliable MVP backends for startups. Clear communication, honest estimates, and code the next developer can pick up without a handover meeting. From a one-off script or bug fix to a full backend: describe what you need and I will tell you how to get there.
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FAQ
Do you write all the code, or just the architecture?
Depends on the package: Basic is architecture + code skeleton; Standard and Premium include full implementation with tests.
Can you add Kafka to my existing project?
Yes, this is one of the most common requests. I audit the current codebase and integrate safely with zero downtime.
What database do you use?
PostgreSQL by default (async SQLAlchemy 2.0). I can adapt to another database by agreement.
