Java Developer

TEKsystems; Warszawa; On-site; PLN 180,000 - 280,000; Full time

Job summary

TEKsystems is seeking a Java Backend Engineer to design, implement and optimize scalable backend services using Java, Spring Boot, and microservices.

You will build RESTful APIs, deploy in AWS, work with Kubernetes and Docker, and collaborate with Product, QA and design teams in an Agile environment.

The role emphasizes secure, resilient systems with observability, CI/CD automation, and strong coding standards.

Qualifications

• Proven backend development experience.
• Deep knowledge of Spring Boot and/or Micronaut frameworks.
• Experience designing RESTful APIs and microservices.
• Strong understanding of distributed systems and design patterns.
• Experience with AWS and cloud-native architectures.
• Hands-on Kubernetes and Docker experience.
• Agile delivery experience and participation in ceremonies.
• Strong troubleshooting in complex distributed environments.

Responsibilities

• Design, develop, test, and maintain backend services and APIs that support financial products.
• Produce clean, maintainable, well-documented code and following engineering standards.
• Build scalable microservices to support cloud-native architectures.
• Develop event-driven solutions using modern messaging technologies.
• Participate in architecture discussions and technical decision-making.
• Develop and deploy applications in AWS, focusing on security and scalability.
• Support containerized workloads using Kubernetes and Docker.
• Contribute to infrastructure automation and DevOps best practices.
• Ensure observability, monitoring, and logging across services.
• Collaborate with Product, Engineers, QA, Designers, and Stakeholders.
• Participate in Agile ceremonies and refinement sessions.
• Translate business requirements into scalable technical solutions.
• Contribute to continuous improvement across teams.
• Act as SME on backend technologies and patterns.
• Mentor junior developers and promote best practices.
• Drive engineering standards and code review excellence.

Skills

Java

Spring Boot

Microservices

REST APIs

AWS

Observability

Agile

CI/CD

Tools

Docker

Kubernetes

Job description

TEKsystems Banking client are looking for a backend engineer with strong

Job Title: Java Backend Engineer

Job Description

TEKsystems Banking client are looking for a backend engineer with strong Java and Spring Boot experience to help build and enhance scalable backend services that power modern digital banking platforms. The role involves designing and developing microservices and RESTful APIs, working within AWS cloud environments, and collaborating with agile engineering teams to deliver resilient, secure, and high-performing solutions.

Responsibilities

• Design, develop, test, and maintain high-quality backend services and APIs that support customer-facing financial products.
• Produce clean, maintainable, reusable, and well-documented code that aligns with engineering standards.
• Build highly available, resilient, and scalable microservices to support cloud-native architectures.
• Develop event-driven solutions using modern messaging technologies to support distributed systems.
• Participate in architecture discussions and contribute to technical decision-making for backend platforms.
• Develop and deploy applications within AWS cloud environments, following best practices for security and scalability.
• Support containerised workloads using Kubernetes and Docker to ensure efficient deployment and orchestration.
• Contribute to infrastructure automation and DevOps best practices to streamline delivery and operations.
• Ensure observability and monitoring across services, promoting operational excellence and reliability.
• Work closely with Product Managers, Engineers, QA Engineers, Designers, and Business Stakeholders to deliver end-to-end solutions.
• Participate in Agile ceremonies including daily stand-ups, sprint planning, retrospectives, and technical refinement sessions.
• Translate business requirements into scalable, robust technical solutions that meet functional and non-functional needs.
• Contribute to continuous improvement initiatives across engineering teams, including process, tooling, and quality enhancements.
• Act as a subject matter expert within the engineering team on backend technologies and patterns.
• Mentor junior developers, providing guidance, feedback, and support to foster their growth.
• Promote engineering standards, code review best practices, and software craftsmanship across the team.
• Drive innovation and continuous improvement within the backend engineering chapter, exploring new tools, patterns, and approaches.

Essential Skills

• Strong commercial experience in backend software development.
• Deep knowledge of Spring Boot and/or Micronaut frameworks for building backend services.
• Proven experience designing and developing RESTful APIs and microservices.
• Strong understanding of software design patterns and distributed systems.
• experience working with AWS services and cloud-native architectures.
• Hands-on experience with Kubernetes and Docker for containerised workloads.
• Knowledge of messaging technologies and event-driven systems.
• experience working in Agile delivery environments, including participation in standard Agile ceremonies.
• Strong troubleshooting and problem-solving capabilities, particularly in complex distributed environments.

Additional Skills & Qualifications

• experience in financial services, fintech, or other regulated industries.
• experience building highly secure applications and handling sensitive data.
• Expertise in CI/CD pipeline development and automation.
• experience with observability tooling, monitoring, and logging platforms.
• Understanding of data-driven product development and analytics.

Why Work Here?

You will join a modern engineering environment that values collaboration, technical excellence, and continuous improvement. The culture encourages knowledge sharing, mentoring, and innovation, giving you the opportunity to influence architecture and best practices. You will work in cross-functional teams with clear product outcomes, benefiting from Agile ways of working and a strong focus on operational excellence. This environment supports professional growth, exposure to contemporary cloud and container technologies, and the chance to contribute meaningfully to impactful financial products.

Work Environment

You will work in a cloud-native environment built on AWS, using container technologies such as Kubernetes and Docker to deploy and run backend services. The teams follow Agile delivery practices with regular stand-ups, sprint planning, retrospectives, and technical refinement sessions. The engineering culture places strong emphasis on observability, monitoring, and logging to maintain reliable and resilient systems. You will collaborate closely with product, QA, design, and business stakeholders in a cross-functional setup, using modern tooling and infrastructure automation to support efficient, high-quality delivery.

Location

Warsaw – 2 days per month onsite

This is a B2B contract, so you would be required to have a Spółka z ograniczoną odpowiedzialnością (Sp. z o.o.) that you can engage through, or be eligible to set one up before starting the role.