Profile
Backend engineer with 8+ years of experience building reliable services and data pipelines. I like clean APIs, boring infrastructure that just works, and documentation people actually read. Comfortable owning a service end to end — from schema design to on-call.
40korders/min handled by the routing service
−35%cloud spend after autoscaling rework
99.95%API uptime over the last 2 years
Experience
Senior Backend Engineer
2023 — presentLogistics SaaS startup · Remote
- Designed and built the order routing service in Go, handling peaks of 40k orders per minute.
- Moved batch jobs to Kafka consumers, cutting end-to-end delivery ETA latency from minutes to seconds.
- Introduced cost-aware autoscaling that reduced the monthly cloud bill by 35%.
Go · Kafka · PostgreSQL · Kubernetes · Terraform
Backend Developer
2020 — 2023Web development agency · Warsaw
- Delivered REST APIs for 12+ client projects in e-commerce and fintech.
- Integrated payment providers and built a reusable billing module used across projects.
- Migrated CI/CD from Jenkins to GitLab CI, shortening release time from a day to 20 minutes.
Python · Django · FastAPI · Celery · Redis
Junior Python Developer
2017 — 2020Data analytics company
- Built ETL pipelines and internal reporting tools on PostgreSQL and ClickHouse.
- Wrote the team's onboarding guide and coding standards.
Python · Pandas · PostgreSQL · ClickHouse
Education
BSc in Computer Science
Technical university
Selected projects
Schema migration helper
Small CLI for zero-downtime PostgreSQL migrations with automatic lock checks.
Rate limiter library
Token-bucket rate limiter for Go services backed by Redis, with Prometheus metrics.