Senior Java Developer

Upvanta • Polish: C1 • Custom Software Development • IT Staffing & Staff Augmentation • Java • 7 days ago
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Salary
$56k – $76k per year
Location
Remote (likely Poland)
Seniority
Senior
Employment
Full-Time

First seen by Alion on Sep 29, 2026.

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Upvanta

Upvanta is a Polish technology company that combines software development services with recruitment, supplying engineers and delivery teams to clients in Poland and western Europe. It works on custom application development, cloud and infrastructure engineering, data platforms and quality assurance, staffing those projects both from its own bench and through placements sourced for the client directly. The company is based in Warsaw, advertises a continuous board of technology vacancies under its own name, and works across financial services, retail and industrial accounts.
upvanta.com • HQ: Warsaw, Poland • IT Staffing & Staff Augmentation • Custom Software Development • 51-200 employees

Szukamy Senior Java Developera do pracy przy integracjach systemowych oraz rozwoju core platformy. Rola koncentruje się na projektowaniu i implementacji niezawodnych integracji REST oraz budowie odpornych na błędy systemów backendowych.

Obowiązki

  • Projektowanie i implementacja integracji REST (w tym VIA REST)

  • Rozwój i utrzymanie komponentów core platformy w oparciu o Java i Spring Boot

  • Implementacja mechanizmów resilience (retry, idempotency, timeout)

  • Tworzenie i utrzymywanie klientów REST (WebClient / RestTemplate)

  • Prowadzenie spike'ów technicznych (REST, mTLS, integracje)

  • Współpraca przy architekturze integracji systemowych

  • Wsparcie testów E2E oraz tuning wydajnościowy aplikacji

  • Konteneryzacja aplikacji i wsparcie procesu wdrożeń

  • Praca z integracjami systemów płatniczych i rozliczeniowych

Wymagania

  • Bardzo dobra znajomość Java oraz Spring Boot

  • Doświadczenie w pracy z REST API (WebClient / RestTemplate)

  • Znajomość wzorców resilience (retry, idempotency, timeout)

  • Doświadczenie w konteneryzacji aplikacji (np. Docker)

  • Doświadczenie w projektowaniu i implementacji integracji systemowych

  • Umiejętność pracy z systemami rozproszonymi

  • Mile widziane doświadczenie w pracy z systemami płatniczymi (payment systems / payment gateways)

  • Mile widziana znajomość standardów i protokołów płatniczych (np. ISO 20022 lub podobnych)

  • Mile widziane doświadczenie w testach E2E oraz optymalizacji wydajności

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