# Senior Java Back-end developer at Worldline

Worldline is hiring a Senior Java Back-end developer in Warsaw, Poland. Level rates it Little AI ●○○○; you can [apply on Worldline](https://jobsbylevel.com/go/e431af60-7b71-4fe8-b776-d1a1d3531f26?utm_medium=ai-agent).

AI Level 1, AI centrality 30 out of 100. Poland-Warsaw.

## Details

- Company: [Worldline](https://jobsbylevel.com/companies/worldline)
- AI level: AI Level 1 (score 30 out of 100)
- Location: Poland-Warsaw
- Posted: September 2, 2026
- Apply: https://jobsbylevel.com/go/e431af60-7b71-4fe8-b776-d1a1d3531f26?utm_medium=ai-agent

## Description

Who we are Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly, simply, and securely. We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business, we are committed to helping our people accelerate their careers. Together, we shape the evolution. The opportunity The role can also be offered on a fully remote basis, if needed. As a member of the Risk Technology Services technical team, you'll go beyond writing high-quality code – you will engage actively in architectural discussions, contribute to technical decisions, and take genuine end-to-end ownership of what you ship. From service design and API development to cloud infrastructure and delivery pipelines, you'll bring strong engineering fundamentals and a platform mindset to a team that builds and operates software together. We're looking for someone who is hands-on, collaborative, and makes the people around them better simply by doing great work. Day-to-day responsibilities Work closely with a cross functional team on the delivery of new features and services; setting the standard and technical direction for Risk tech service. Own architecture and design decisions: service boundaries, APIs, cross-service contracts, and data models - balancing simplicity, reliability, security, and maintainability. Design database schemas and manage evolution through versioned migrations. Design and build RESTful APIs and asynchronous/event-driven integrations between services. Apply resilience patterns (retries, idempotency, circuit breakers) and champion test-driven development with strong coverage. Own delivery: contribute to CI/CD pipelines, containerization, cloud infrastructure, and observability. Diagnose complex issues across services and infrastructure; lead incident investigation and resolution. Run and participate in code reviews; mentor mid-level and junior developers. Establish and uphold coding standards, security practices, and design principles across the team. Who are we looking for 4+ years of professional Java development experience Experience with modern Java (latest LTS) and a mindset of keeping up with the newest stable language features and tooling. Proficiency in Java and object-oriented (and ideally functional) programming principles. Strong experience with Spring Boot and the Spring ecosystem, including Spring Security / OAuth2. Solid SQL and relational database experience (e.g. PostgreSQL), including schema design and query optimization. Experience with a schema migration / database versioning tool (e.g. Flyway, Liquibase). Proven experience designing and building RESTful APIs and integrating distributed services. Experience with containers (e.g. Docker) and CI/CD pipelines (e.g. Jenkins, GitLab CI) Strong experience with automated testing - unit and integration (e.g. JUnit, Testcontainers). Solid grasp of software architecture and design patterns (e.g. clean/hexagonal architecture, DDD). Solid Understanding of secure coding, resilience, and observability in production systems. Confident use of Git and modern branching/merging workflows. Perks & Benefits Private medical & life insurance MyBenefit Platform Holiday allowance Public transportation allowance Meal allowance Annual bonus. We are proud to be an Equal Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as an individual with a disability, or any applicable legally protected characteristics. Pursuant to the Article 24 sec. 6 of the Act of 14 June 2024 on the protection of whistleblowers, we inform you that Worldline Financial Services (Europe) S.A., a joint-stock company, Branch in Poland

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/senior-java-back-end-developer-at-worldline-fff2fd

Source: https://jobsbylevel.com/jobs/senior-java-back-end-developer-at-worldline-fff2fd

## Cite this page

Level. https://jobsbylevel.com/jobs/senior-java-back-end-developer-at-worldline-fff2fd.

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