API Integration Developer

Your ITeams Sp. z o.o.; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Luxmed Gold Extended medical care

Multisport Plus

Job summary

Your ITeams Sp. z o.o. is seeking an API Integration Developer to design, implement and maintain integration services and APIs within a microservices ecosystem.

You will contribute to CI/CD automation, operate in Kubernetes environments, and ensure the quality, security and performance of delivery pipelines. The role requires 4+ years of Java experience, deep API design skills, and hands-on work with Kafka/RabbitMQ and modern cloud-native tooling.

Qualifications

• 5+ years of commercial Java development experience with Java 21+ and Spring Boot.
• Design and implement inter-system integrations and APIs using REST/JSON/OpenAPI, OAuth 2.0 and JWT.
• Experience with microservices, Kubernetes, and CI/CD tools (Bamboo/Jenkins).
• Familiarity with Kafka or RabbitMQ and API management platforms.

Responsibilities

• Design, implement, test and maintain integration flows and APIs.
• Collaborate with architects and product teams to refine requirements.
• Ensure solutions meet security, performance, and reliability standards.
• Participate in code reviews and promote best practices in software delivery.

Skills

Java

Spring Boot

API design

Microservices

CI/CD

Kubernetes

REST/JSON/OpenAPI

OAuth 2.0 / JWT

Kafka / RabbitMQ

API Management

Git / Bitbucket

Unit testing

SQL (PostgreSQL/Oracle)

Tools

Apache Kafka

RabbitMQ

OpenAPI

Bamboo

Jenkins

Git

Bitbucket

PostgreSQL

Oracle

Job description

API Integration Developer will design, implement and maintain integration services and APIs for a project that transforms the digital business domain. The role involves delivering integrations between systems within a microservices architecture, applying CI/CD automation, operating in Kubernetes environments, and ensuring quality, security and performance of services.

Responsibilities

• Design, implement, test and maintain integration flows and APIs in accordance with requirements and the Definition of Done.
• Participate actively in technical decision-making related to integration and API implementation, ensuring alignment with architectural standards.
• Ensure delivered solutions meet quality, security, availability and performance requirements; diagnose incidents and address root causes.
• Collaborate with architects, analysts, Product Owners and project teams to refine requirements and agree on solutions.
• Contribute to estimation, sprint planning and assessment of technical risks.
• Support team members with technical problem solving and share best practices.
• Regularly participate in code reviews and help evolve coding standards and automation in software delivery.

Qualifications

• 4+ years of commercial experience developing applications in Java, including practical work with Java 21+ and Spring Boot; experience with Spring Cloud and Hibernate is a plus.
• Proven experience designing and implementing inter-system integrations and APIs using REST, JSON, OpenAPI, OAuth 2.0 and JWT; familiarity with SOAP and XML.
• Experience building asynchronous integrations using Apache Kafka, RabbitMQ or other message brokers.
• Experience with API Management platforms for publishing and securing APIs.
• Experience developing solutions in a microservices architecture and deploying them to Kubernetes.
• Familiarity with CI/CD processes and tools, particularly Bamboo or Jenkins, and with Git/Bitbucket; practical experience automating deployments and working with Jira.
• Experience writing unit tests and using Java testing frameworks.
• Experience working with PostgreSQL or Oracle databases, including creating and optimizing SQL queries.
• Demonstrated ability to work independently in projects, resolve technical problems and make technical decisions.
• Hybrid model from Warsaw: 3 working days from Warsaw office (Wola), 2 days remote
• Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere.
• Agile approach and no bureaucracy.
• Activities to support your well-being and health.
• Luxmed Gold Extended medical care and Multisport Plus benefit.