Oscilar

Sr./Staff Backend Engineer - Java (Poland)

32k - 47k PLN32 000 - 47 000 PLN/ mies./ mies.B2BB2B (netto)

SeniorOn-site·WarszawaFull-time·B2B

#458295·Dodano 10 dni temu·7

Źródło: justjoin.it

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Tech Stack / Keywords

Java AWS KafkaAPIGitHub

Podsumowanie oferty

As a Senior/Staff Backend Engineer at Oscilar, you will own critical parts of a platform used by banks and fintechs for real-time fraud, credit, and compliance decisions. You will be part of a small, senior team making impactful technical decisions. The role involves designing, building, and maintaining low-latency, high-scale distributed Java services and working closely with product and customer-facing teams.

Wymagania

5+ years of backend development with deep expertise in Java and its ecosystem.
Proven experience delivering work from concept to production with minimal supervision.
Solid experience building and operating low-latency, high-scale distributed systems.
Hands-on experience with AWS, microservices, and containerization (Docker, Kubernetes).
Experience with event streaming and data systems (Kafka, ClickHouse, PostgreSQL, Redis).
Good understanding of API design and security best practices.
Strong written and verbal communication skills with experience working asynchronously using tools like Slack, Notion, Linear, and GitHub.

Nice to have:

Experience with Flink, Temporal, or Databricks.
Background in fintech, fraud prevention, risk, or payments.
Degree in Computer Science, Software Engineering, or related.
Experience using AI coding agents such as Claude Code in daily development.

Obowiązki

Own features end to end: design, build, ship using GitHub Actions, feature flags with LaunchDarkly, and maintain production quality.
Build and scale core Java services with focus on latency and reliability.
Work on real-time streaming and data systems including Kafka, Flink, ClickHouse, and Databricks.
Build reliable processes with workflow orchestration tools like Temporal.
Make architectural decisions, propose trade-offs, and write design documents.
Collaborate with product, frontend, and customer teams to understand requirements.
Own production monitoring, performance tuning, and root cause fixes.
Participate in code reviews and knowledge sharing to raise engineering standards.

Benefity

Competitive salary: 32,000 – 47,000 PLN net/month + VAT on B2B contract.
Remote-first culture with a Poland-based, fully remote team collaborating internationally.
AI-first company with over 50% of employees in Engineering and Product.
Family-friendly environment with regular team events and offsites.
Extensive learning and professional development opportunities.
Latest MacBook or Linux machine provided as equipment.
Contractor relationship with flat monthly fee and flexibility to take time off with advance notice.

Elastyczne godziny

Spotkania integracyjne

Inne informacje

Administratorem Twoich danych jest Oscilar (dalej: „Administrator”). Dane przetwarzamy w celu rekrutacji na stanowisko z ogłoszenia — na podstawie Kodeksu pracy (art. 6 ust. 1 lit. c RODO) w zakresie danych obowiązkowych, Twojej zgody (art. 6 ust. 1 lit. a RODO) w zakresie danych dodatkowych oraz naszego prawnie uzasadnionego interesu (art. 6 ust. 1 lit. f RODO) w zakresie obrony przed roszczeniami. Podanie danych wymaganych Kodeksem pracy jest obowiązkowe, pozostałych — dobrowolne. Dane przechowujemy do zakończenia rekrutacji i przez okres przedawnienia roszczeń, a przy zgodzie na przyszłe rekrutacje — do jej wycofania, nie dłużej niż 24 miesiące. Odbiorcami mogą być nasi dostawcy usług rekrutacyjnych, w tym JUST JOIN IT Sp. z o.o., operator serwisów rocketjobs.pl, justjoin.it, rocketjobs.com. Masz prawo dostępu do danych, ich sprostowania, usunięcia, ograniczenia i przenoszenia, wniesienia sprzeciwu oraz skargi do Prezesa UODO. Zgodę możesz wycofać w każdej chwili — bez wpływu na przetwarzanie sprzed wycofania. Dane nie podlegają profilowaniu.

Oscilar

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