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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on modern backend systems in the financial sector, emphasizing microservices architecture and large data processing. Technologies include Java, Spring, Kubernetes, GCP, REST APIs, and message queues (MQ). Responsibilities cover designing high-availability, high-performance systems, developing microservices, integrations, CI/CD, and system security. Benefits offered include private healthcare, benefits package, growth support.
FX Senior Java Developer (f/m/x)
Company: Sii Sp. z o.o.
from: 16 July 2026
to: 15 August 2026
salary not specifiedB2B contract
Offer parameters
level:senior
working mode:hybrid • full office
Kraków, Podgórze
Requirements
Expected technologies
Java
Spring Boot
REST
Microservices
SQL
Kubernetes
Optional technologies
Rust
NoSQL
ClickHouse
Kafka/MQ
Google Cloud Platform
Kafka
Go
Our 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
Optional
- 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
Your responsibilities
- 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
About the project
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.
This is how we work on a project
- Continuous Deployment
- Continuous Integration
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 – you can change them thanks to Job Changer application
- 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
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
FX Senior Java Developer (f/m/x)
I apply to:
Sii Sp. z o.o.
Kraków, Podgórze
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