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Sii Sweden

SII POLAND

SII UKRAINE

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FX Senior Java Developer (f/m/x)

  • Senior
  • Hybrid, 
  • Office
  • Cracow
This offer base language is English. Translate into Swedish.
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Technologies & tools

We are looking for an experienced Senior Java Developer to join a team responsible for building and developing modern backend systems in a distributed environment. The projects involve high-performance and scalable solutions used in the financial sector, with a focus on processing large volumes of data and microservices architecture.

Your tasks

  • Designing and developing backend systems based on Java
  • Creating and evolving a microservices architecture
  • Building and maintaining REST APIs and system integrations
  • Designing solutions that meet high availability and performance requirements
  • Working with systems that process large volumes of data
  • Collaborating with the team using Agile methodologies
  • Participating in architecture design and technical decision-making
  • Implementing and optimizing CI/CD processes and ensuring system security

Requirements

  • Minimum 10 years in software development
  • Very good knowledge of Java (backend) and Spring
  • Strong understanding of REST APIs, HTTPS, microservices, and message queues (MQ)
  • Ability to design high-availability, scalable, and high-performance systems
  • Very good knowledge of relational databases (SQL)
  • Familiarity with CI/CD pipelines and Agile ways of working
  • Knowledge of distributed systems and data processing
  • Hands-on work with Kubernetes and cloud platforms (GCP preferred)
  • Fluent Polish and English required
  • Residing in Poland required

Nice to have

  • Knowledge of Go, Rust, or similar system-level languages
  • Experience with NoSQL and analytical databases, e.g., ClickHouse
  • Frontend development experience
  • Familiarity with the banking sector (trade lifecycle, FX, post-trade processing)
  • Banking experience / FX experience (forex)
  • Working from the office in Krakow 6 times per month

Job no. 260615-CBBQW

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Teknologier & verktyg

Vi söker en erfaren senior Java-utvecklare till ett team som ansvarar för att bygga och utveckla moderna backend-system i en distribuerad miljö. Projekten omfattar högpresterande och skalbara lösningar som används inom finanssektorn, med fokus på bearbetning av stora datamängder och mikrotjänstarkitektur.

Dina uppgifter

  • Utformning och utveckling av backend-system baserade på Java
  • Skapa och vidareutveckla en mikrotjänstarkitektur
  • Bygga och underhålla REST-API:er och systemintegrationer
  • Utforma lösningar som uppfyller höga krav på tillgänglighet och prestanda
  • Arbeta med system som hanterar stora datamängder
  • Samarbeta med teamet med hjälp av agila metoder
  • Delta i arkitekturdesign och tekniska beslut
  • Implementera och optimera CI/CD-processer samt säkerställa systemsäkerheten

Krav

  • Minst 10 års erfarenhet av mjukvaruutveckling
  • Mycket goda kunskaper i Java (backend) och Spring
  • God förståelse för REST-API:er, HTTPS, mikrotjänster och meddelandeköer (MQ)
  • Förmåga att utforma system med hög tillgänglighet, skalbarhet och hög prestanda
  • Mycket goda kunskaper i relationsdatabaser (SQL)
  • Vana vid CI/CD-pipelines och agila arbetssätt
  • Kunskap om distribuerade system och databehandling
  • Praktisk erfarenhet av Kubernetes och molnplattformar (gärna GCP)
  • Flytande polska och engelska krävs
  • Bosatt i Polen krävs

Bra att ha

  • Kunskaper i Go, Rust eller liknande språk på systemnivå
  • Erfarenhet av NoSQL och analytiska databaser, t.ex. ClickHouse
  • Erfarenhet av frontend-utveckling
  • Kännedom om banksektorn (handelscykel, valutahandel, efterhandelshantering)
  • Erfarenhet från banksektorn / erfarenhet av valutahandel (forex)
  • Arbete på kontoret i Krakow 6 gånger per månad

Jobb nr 260615-CBBQW

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

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FX Senior Java Developer (f/m/x)

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