FX Senior Java Developer (f/m/x)

Senior • Hybrid

24,000 - 30,000 PLN

Krakow, Poland

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 requirements

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

What we offer

Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
Comfortable workplace – class A offices or remote work
Dozens of fascinating projects for prestigious brands from all over the world
PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
Investment in your growth – meetups, webinars, training platform and technology blog – you choose
Fantastic atmosphere created by all Sii Power People

If you want to work on systems with high operational significance — apply now!

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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