Senior Backend Engineer - Banking & Financial Products (Warsaw)

25k - 40k PLN25 000 - 40 000 PLN/ mies./ mies.B2BB2B (netto)

SeniorHybryda·WarszawaFull-time·B2B

#474673·Dodano 5 dni temu·2

Źródło: Fresha

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Tech Stack / Keywords

Ruby Elixir TypeScript GraphQL Kafka gRPC Postgres Kubernetes CI/CDJSON

Podsumowanie oferty

Build and operate backend services for Fresha’s banking and financial products in a cross-functional product team. The backend stack includes Ruby, Elixir, TypeScript, GraphQL, Kafka, Postgres, and Kubernetes.

Wymagania

5+ years building and running backend services in production.
Design for correctness when requests arrive more than once, downstream calls time out, or concurrent updates affect the same record.
Experience building and running distributed services at scale, and understanding how they fail.
Experience designing systems around asynchronous events; Kafka or an equivalent.
Comfortable shipping behind flags and monitoring changes; know what to instrument before rollout and what to watch afterwards.
Use AI coding tools day to day, understand where they help and where they do not, build your own workflow, and review results before they ship. Claude, Codex, and Cursor are mentioned as tools used at Fresha.
Strong in at least one backend language and able to pick up new languages quickly.
Experience building software products in banking, fintech, payments, financial services, or another domain involving financial transactions; interest in building reliable, secure, and scalable financial products.
Prefer the right tool for the job over a particular stack and have worked in more than one style of language.
Enjoy getting deep into a domain and are willing to get into the weeds.
Willing to pick up what a piece of work needs.

Nice to have:

Frontend or native mobile experience.

Obowiązki

What You’ll Do:

Own features end to end: design, build, test, ship, and look after them once they are live.
Ship changes behind a feature flag, usually on the day they are written; use CI/CD for rollout, watch dashboards, and roll back if needed.
Plan and ship changes across several services and repositories.
Work with Product, Design, Frontend, Infrastructure, and Mobile from the first conversation through release.
Find bottlenecks, fix bugs, and monitor performance and quality.
Push on the architecture and engineering practices.

Benefity

Access to the tooling, data, and permissions needed to run what you build, and a say in the technical direction of your area.
Time and support to learn the frontend or mobile side when moving into that work.

Udziały pracownicze

Inne informacje

The team shares an on-call rota.
Interview process: a 30-minute video call with a Talent Team member; a 90-minute technical video or in-person interview; a practical coding session plus system design and architecture lasting up to 2 hours; and a 60-minute video interview with the Head of Engineering or VP of Engineering.

Fresha

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