FX Senior Java Developer (f/m/x)

About the Position

We are seeking an experienced Senior Java Developer to join our team in Cracow, Poland, focusing on 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.

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

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

We Offer

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care

About the Company

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.