May 23, 2026
Mid-Level Java API Developer – Cloud-Native Backend Services
Mid • Hybrid
27,720 - 33,600 PLN
Krakow, Poland
Unleash the power of modern development — drive innovation through scalable API solutions!
Krakow-based opportunity with hybrid work model.
As a Mid-Level Java API Developer, you will be working for our client, a leader in digital banking services. You will design, build, and run secure, scalable APIs that support HSBC’s digital products and internal platforms. Collaborating within a cross-functional engineering team, you'll enable reliable services using cutting-edge Java and cloud-native architecture, including event-driven patterns. This role offers an exciting chance to contribute to financial technology innovation and advance your career in a dynamic environment.
Your main responsibilities:
- Build and evolve high-performing, scalable APIs and backend services using Java, Spring Boot, Maven, primarily in IntelliJ
- Collaborate with engineers, product owners, architects, and testers to deliver well-designed services aligned with business goals
- Design APIs following industry standards and patterns (e.g., REST, GraphQL, SOAP), ensuring versioning and backward compatibility
- Integrate with third-party and internal APIs, focusing on resilience, observability, and error handling
- Develop and support event-driven services using Kafka, including topic design, schema evolution, and message reliability
- Build cloud-ready services on AWS platforms such as Kubernetes/EKS, Fargate, Redis, RDS, S3, and Route 53
- Write automated tests, perform API testing, troubleshoot production issues, and contribute to continuous quality improvements
- Maintain clear API documentation (OpenAPI/Swagger) and create runbooks as needed
- Contribute to engineering standards focused on security, performance, and maintainability
You're ideal for this role if you have:
- At least 4 years of experience building APIs and backend services in Java
- Strong experience with Spring Boot and Maven development tooling
- In-depth understanding of backend architecture, including service design, data access, caching, and resilience patterns
- Knowledge of API standards such as REST, GraphQL, and SOAP
- Familiarity with API tooling like Postman, Swagger UI/OpenAPI, SoapUI
- Comfort working with JSON and XML data formats
- Proven ability to diagnose issues, fix defects, and enhance system reliability
- Excellent collaboration skills and clear technical communication
It is a strong plus if you have: (optional)
- Experience with event-driven architecture at scale (Kafka streams, schema registry, idempotency, exactly-once/at-least-once delivery)
- Hands-on experience building and operating services on AWS (Kubernetes/EKS, Fargate, Redis, RDS, S3)
- Knowledge of CI/CD pipelines, observability tools (logging, metrics, tracing), and secure coding practices
- Strong critical thinking with a pragmatic, delivery-oriented mindset
Language Required for the role:
- Good command of English (Communicative level)
Eligibility for the role:
- Only candidates with an existing legal right to work in the European Union will be considered for this role.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
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Krakow, Poland
24,150 - 30,450 PLN
🏢 Summary: Senior Java Developer role focused on designing and delivering scalable APIs and microservices within a cloud-native platform environment. The position involves building high-performance backend solutions in Java and Kotlin, working in Agile CI/CD teams, and driving integration and compliance excellence. Hybrid work model based in Kraków. 🗂️ Requirements: 5+ years of software development experience, Strong experience with Java, Strong experience with Kotlin, Experience in API development, Experience with SQL and databases, Knowledge of HTML and JavaScript, Understanding of microservices architecture, Experience working in Agile environments, Experience using Jira and Confluence, Fluent English (B2+), Legal right to work in the European Union 📃 Skills: Java, Kotlin, API, SQL, HTML, JavaScript, Microservices, Jira, Confluence, CI/CD, AWS, Azure, GCP, Jenkins, Linux, AIX, WAS 🏢 Description: Unleash innovation — master scalable APIs and Microservices to transform digital ecosystems! Kraków-based opportunity with hybrid work model As a Senior Java Developer – API & Microservices Expert , you will be working for our client, a leader in building cloud-native platforms focused on streamlining software development & compliance management. Contribute to cutting-edge microservice architectures, helping development teams achieve operational excellence and compliance. This role offers a chance to shape scalable solutions and advance your career in a dynamic tech environment. Your main responsibilities: Collaborate with cross-functional teams to design, develop, and implement impactful APIs and microservices. Build robust backend solutions using Java and Kotlin, ensuring high performance and scalability. Lead efforts in troubleshooting, optimizing, and ensuring seamless integrations across platforms. Work within an agile CI/CD environment to deliver rapid, high-quality iterations. Engage proactively with users and stakeholders to understand and respond to their needs. Participate in peer code reviews and automate testing to maintain high development standards. You're ideal for this role if you have: Over 5 years of experience in software development, with a focus on Java and Kotlin. Proven expertise in API creation, SQL/databases, and HTML/JavaScript. Strong troubleshooting and analytical skills. Experience working in Agile environments using Jira and Confluence. Good understanding of microservices architecture. Fluent English (B2+) communication skills. It is a strong plus if you have: (optional) Experience with cloud platforms like AWS, Azure, or GCP. Knowledge of CI/CD pipelines with Jenkins. Background in Systems Administration across Linux, AIX, or WAS platforms. Language Required for the role: Fluent English (B2+) Eligibility to work in the European Union: Only candidates with an existing legal right to work in the EU will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
Technology
ITDS
Mid-Level/Senior Kotlin (Java) Developer – Microservices & API Focus
Mid
Hybrid
Krakow, Poland
18,900 - 25,200 PLN
🏢 Summary: Mid-Level/Senior Kotlin (Java) Developer role focused on designing and building microservices and APIs within a compliance management platform. The position involves developing backend and web applications in a microservice architecture, contributing to CI/CD processes, and delivering high-quality solutions in an agile environment. Hybrid work model based in Kraków with up to 3 days of remote work per week. 🗂️ Requirements: 4+ years of software development experience, Experience in backend and API development, Proficiency in Kotlin or Java, Experience with API development, Experience with SQL and databases, Experience with HTML and JavaScript, Understanding of microservice architecture, Experience working in Agile environments, Knowledge of Jira and Confluence, Fluent English (B2+ level), Legal right to work in the European Union 📃 Skills: Kotlin, Java, SQL, HTML, JavaScript, Microservices, APIs, CI/CD, Jira, Confluence, AWS, Azure, GCP, Jenkins, Linux, AIX, WebSphere 🏢 Description: Unleash innovation — design cutting-edge microservices and APIs that drive digital transformation! Kraków-based opportunity with hybrid work model (up to 3 days remote per week). As a Mid-Level/Senior Kotlin (Java) Developer , you will be working for our client, a forward-thinking organization building a platform for control owners and development teams to manage and monitor software development compliance. You will contribute to Kotlin and Java-based web applications and APIs within a microservice architecture, supporting innovative solutions across multiple applications and PoCs. This role offers a unique chance to shape the future of development standards while advancing your career in a dynamic environment. Your main responsibilities: Collaborate with cross-functional teams to develop and operate products that meet strategic goals. Design, develop, and implement both front-end and back-end features that support flexible UI frameworks. Build efficient APIs and microservices to address impactful business needs. Work within an agile CI/CD environment to deliver continuous improvements at high velocity. Engage in peer reviews, testing, and automated test scripting to ensure high-quality code. Proactively troubleshoot issues and respond to customer feature requests with innovative solutions. You're ideal for this role if you have: 4+ years of experience in software development, with a focus on backend and API development. Solid expertise in Kotlin or Java (with a willingness to learn Kotlin). Hands-on experience with API development, SQL/databases, and HTML/JavaScript. Strong problem-solving and troubleshooting skills. Experience working in Agile environments with tools like Jira and Confluence. Good understanding of microservice architecture. Excellent interpersonal and communication skills in English (B2+ level). It is a strong plus if you have: Good working knowledge of cloud platforms such as AWS, Azure, or GCP. Experience building CI/CD pipelines using Jenkins. Background in Systems Administration across Linux, AIX, or WebSphere platforms. Language Required for the role: Fluent English (B2+ level). Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.