- Location
- Bayern · Warsaw
- Workplace
- Remote, Hybrid, Onsite
- Type
- Full-time
- Department
- Engineering
- Seniority
- Mid
- Experience
- 3+ years
- Source
- Personio
Description
Tech stack you’ll work with
- Core: Golang, AWS Serverless (Lambda, API Gateway, SQS)
- Data: DynamoDB, PostgreSQL
- Messaging: Kafka
- Ops / Tooling: Terraform, Guthub Actions (CI/CD)
Your role
Your mission and responsibilities
Mid Backend Software Engineer
Implement new micro-services and extend existing ones in Go.
Help groom user-story requirements and surface performance / scaling concerns early.
Write unit, integration and API tests; review PRs.
Tune data-models in DynamoDB & Postgres for low-latency, high-throughput workloads.
Pair with DevOps on CI/CD and observability improvements.
Participate in on-call rotation as we’re building high available fintech system
Additional tasks of the Senior
- Design and drive high-scale, low-latency services (tens of thousands of orders / sec).
- Lead architecture reviews, challenge assumptions and keep tech debt in check.
- Partner with Product on roadmap feasibility & effort sizing.
- Be a mentor to less experienced colleagues
Your qualifications and experience
3+ years of professional back-end experience (ideally 1 year+ in Go).
Solid grasp of cloud-native design (RESTful APIs, event-driven patterns).
Working SQL and NoSQL skills; know when each shines.
Comfort diagnosing performance bottlenecks in distributed systems.
Ability to work on-site in Warsaw twice a week (Tue & Thu) and remotely otherwise.
Nice to have
Exposure to serverless architectures on AWS.
Experience with Kafka or another high-volume message bus.
Knowledge of automated trading, market data, or FIX/crypto exchanges.
Familiarity with Infrastructure-as-Code (Terraform or CDK).
Contract
B2B / Employment contract
Location
Hybrid (Warsaw – in-office every Tuesday & Thursday)
Why us?
What We Offer:
An experienced, welcoming team that loves clean, well-tested code.
Real impact: the features you ship go straight into production for live traders.
Flexible hours, modern tooling, and a fintech domain that’s never boring.
Occasional work travel to Germany (Munich / Berlin)
20 days PTO on B2B
Multisport card
Apply now!
Apply now!