Senior Java Consultant

GFT TECHNOLOGIES SE; Poznań; On-site; PLN 172,200 - 220,416; Full time

Job summary

GFT TECHNOLOGIES SE is looking for a backend developer in Poznań, Poland, to build and evolve high-performance backend services and APIs for a global financial client. Must have commercial experience with Java (8+/11+/17+), strong knowledge of Spring and REST APIs, and familiarity with CI/CD pipelines. The role offers a hybrid working model with 2 days a week on-site and provides an opportunity to work in a collaborative environment focused on engineering quality.

Qualifications

• Commercial experience with Java 8+, 11+, or 17+.
• Strong knowledge of Spring and Spring Boot.
• Hands-on experience with REST APIs and microservices architecture.
• Experience with SQL databases such as PostgreSQL or Oracle.
• Familiarity with CI/CD pipelines and Git.
• Very good English communication skills.

Responsibilities

• Design and develop backend services in Java.
• Build and maintain RESTful APIs and microservices at scale.
• Collaborate with teams to deliver new features.
• Contribute to system design focusing on reliability and security.
• Review code, write automated tests, and support applications in production.

Skills

Java 8+

Spring and Spring Boot

REST APIs

Microservices architecture

SQL databases

CI/CD pipelines

Git

Maven or Gradle

Agile or DevOps practices

English communication

Job description

Location: Kraków, PL; Łódź, PL; Poznań, WP, PL; Warszawa, PL; Warsaw

Working place: Hybrid

Type of contract: B2B contract

Salary range: 125-160 PLN/H

What will you do?

You will build and evolve high-performance backend services and APIs for modern, large-scale digital platforms used by a global financial services client, working hands‑on in a collaborative international environment with a strong focus on reliability, security, and engineering quality.

• Design and develop backend services in Java
• Build and maintain RESTful APIs and microservices used at scale
• Collaborate with product managers, architects, and engineers to deliver new features
• Contribute to system design with focus on performance, reliability, and security
• Work in Agile delivery with CI/CD pipelines and DevOps ways of working
• Review code and write automated tests to ensure quality and maintainability
• Support applications in production and troubleshoot issues when needed
• Continuously improve code quality, tooling, and engineering practices

Requirements

• Commercial experience with Java 8+, 11+, or 17+
• Strong knowledge of Spring and Spring Boot
• Hands‑on experience with REST APIs
• Hands‑on experience with microservices architecture
• Experience with SQL databases such as PostgreSQL or Oracle
• Familiarity with CI/CD pipelines
• Experience with Git
• Experience with Maven or Gradle
• Experience working in Agile or DevOps teams
• Very good English communication skills
• Openness to hybrid work: 2 days a week from our client office (for candidates from Kraków) and 6 days per month for candidates based outside Kraków.

Nice to have

• Experience with AWS or GCP or Azure
• Experience with Docker
• Experience with Kubernetes
• Experience with Kafka or MQ or other event‑driven messaging systems
• Experience in banking, finance, or other regulated environments