API Engineer with Java

We are seeking a skilled API Engineer to be a key player in our API transformation. You will be at the heart of our new central API Gateway platform , responsible for building the critical integrations and tooling that will empower our development crews across the organization. With APIs being developed in different crews, your primary focus will be on the technical onboarding of these services onto the gateway. You will lead the hands-on integration of OAuth and a new, yet-to-be-chosen identity provider , creating a secure, standardized, and scalable entry point for all our API traffic. This role is perfect for an engineer who excels at building platform-level solutions and enabling other developers to succeed.

Your responsibilities :

Design, develop, and implement high-quality, scalable REST APIs using Java and Spring Boot.

Ensure the security, performance, and reliability of all APIs by implementing proper authorization, policies, and best practices.

Integrate a variety of internal and external systems to create seamless and efficient workflows.

Build and maintain robust CI / CD pipelines to automate API testing and deployment.

Implement comprehensive observability for our APIs, including distributed tracing, metrics, and logging.

Operate in a "You Build It, You Run It" (YBIYRI) environment, taking full ownership of your services.

Collaborate with cross-functional teams to deliver exceptional API products and provide clear guidance and support for onboarding their services.

Your Profile :

Hands-on experience with integrating an API Gateway product into an existing API landscape

Deep, practical experience integrating systems with Identity Providers (e.g. Keycloak) using standards like OAuth 2.0 and OIDC.

Hands-on experience with OpenAPI specification and respective tooling

Hands-on experience implementing REST APIs, preferably with Java and Spring Boot.

Strong experience with microservice-based architectures

Hands-on experience with Docker and Kubernetes

Expertise and hands-on experience in industry-standard authorization protocols (e.g., OAuth 2.0, JWT).

Deep understanding of the full API life-cycle management.

Experience with setting up API observability (traces, metrics, logs).

Solid understanding of security, logging, auditing, policy, and throttling for APIs.

Proven experience in building and developing CI / CD pipelines and respective build and deployment tools such as Gradle and Helm

Profound experience with unit and integration testing

Hands-on experience with automation of of API testing.

Hands-on experience with cloud platforms (GCP preferred), GitHub, and build tools like Gradle.

Optional (but highly important) :

Good knowledge of SOAP-based web services and WSDLs.

Nice to Have :

Experience with other programming languages such as Go.

Knowledge of Datalog.

Please send your cv in English.

How about?

Employment contract? Of course. With us you do not have to worry about stable employment.

Benefits? We have them! Among other : corporate incentive program, sport card, private medical care.

Lunch card? With the cooperation extended and permanent contract, you will receive additional funds to use for meal purchases.

Working in a hybrid model? Of course! ! You work with us 2 days a week from home.

Work wherever you want? In PAYBACK you have the opportunity. Working 100% remotely, also from European countries for 15 days a year.

‎Flexible working hours? Sounds great! We start working between 7 to 10.

Trainings? Of course. We provide training to develop hard and soft skills.

Convenient location? Sure! We invite you to our new office at Rondo Daszyńskiego, but we are currently also working remotely.

Dress code? We definitely say no. There are no rigid dress code rules in our company, sneakers are more than welcome.

Friendly atmosphere at work? Yes! In PAYBACK, people are the most important asset‎.

‎Something is missing? Open communication is our priority, so dare to ask!‎