Mid-Level/Senior Kotlin (Java) Developer – Microservices & API Focus

🏢 Summary: Mid-Level Kotlin/Java Developer role focused on building and enhancing a microservices-based Developer Experience platform in the fintech domain. The position involves designing and implementing web applications and APIs, improving compliance and automation through scalable cloud-integrated solutions. The role follows a hybrid model in Krakow and emphasizes Agile delivery and high-quality code practices. 🗂️ Requirements: 3+ years experience with Java or Kotlin, Experience in API development, Experience with SQL databases, Knowledge of HTML, Knowledge of JavaScript, Understanding of microservices architecture, Experience working in Agile environments, Experience with Jira and Confluence, Strong troubleshooting skills, English B2+ level, Legal right to work in the EU 📃 Skills: Java, Kotlin, SQL, HTML, JavaScript, Microservices, APIs, Agile, Jira, Confluence, CICD, Jenkins, AWS, Azure, GCP, Linux, AIX, WAS, Testing, TestAutomation 🏢 Description: Unleash innovation through code — drive the next evolution of microservices and cloud integration! Krakow-based opportunity with hybrid work model As a Mid-Level Kotlin/Java Developer , you will be working for our client, a leading player in the financial technology industry, focused on building a cutting-edge Developer Experience platform. You will help develop a robust microservice architecture to enhance compliance and streamline development processes, shaping the future of software control and automation. Join us and be part of a transformative journey that fosters innovation and career growth. Your main responsibilities: Collaborate with cross-functional teams to design, develop, and implement web applications and APIs using Kotlin and Java. Build and maintain microservices that address critical business challenges and improve developer experience. Work closely with testers and other developers to ensure high-quality, efficient code delivery. Proactively engage with customers and internal stakeholders to resolve issues and incorporate feature requests. Participate in Agile practices, including peer reviews, automated testing, and continuous integration/deployment workflows. You're ideal for this role if you have: 3+ years of experience in Java, Kotlin, or related development fields. Strong expertise in API development, databases (SQL), and front-end technologies such as HTML/Javascript. Solid troubleshooting skills and experience working within Agile environments using Jira/Confluence. Good understanding of microservice architecture. Excellent communication skills in English (B2+). It is a strong plus if you have: (optional) Cloud technology experience (AWS, Azure, GCP). Knowledge of CI/CD toolchains like Jenkins. Background in Systems Administration across Linux/AIX/WAS platforms. Test Automation skills. Language Required for the role: English (B2+ 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.

🏢 Summary: Senior Kotlin (Java) Developer role focused on building and operating microservices-based web applications and APIs within a cloud-driven environment. The position involves designing full-stack features, contributing to CI/CD pipelines, and ensuring high code quality in an agile setup. It offers the opportunity to shape developer experience through innovative, compliance-focused platforms. 🗂️ Requirements: Minimum 6 years of software development experience, Strong experience in Kotlin, Knowledge of Java and willingness to use Kotlin, Hands-on experience with API development, Experience with SQL and databases, Experience with HTML and JavaScript, Understanding of microservice architecture, Experience working in Agile environment, Experience with CI/CD practices, Proficiency with Bitbucket, Jira, Confluence, Fluent English (B2+ level), Legal right to work in the European Union 📃 Skills: Kotlin, Java, SQL, HTML, JavaScript, Microservices, API, CI/CD, Bitbucket, Jira, Confluence, AWS, Azure, GCP, Jenkins, Linux, AIX, WAS 🏢 Description: Unleash innovation in microservices and cloud — drive digital transformation with Kotlin expertise! Kraków-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Kotlin (Java) Developer , you will be working for our client, a leader in building a robust platform for managing software development compliance. You will contribute to cutting-edge web applications and APIs built with microservice architecture, supporting development teams across the organization. This role offers a unique chance to shape the future of developer experience and work at the forefront of technology innovation. Your main responsibilities: Collaborate with developers, testers, and other stakeholders to build and operate innovative products. Design, develop, and implement both front-end and back-end features aligned with business priorities. Work on APIs and microservices-driven solutions addressing impactful business challenges. Engage actively in an agile CI/CD environment to ensure rapid delivery and iteration. Participate in peer reviews and contribute to automated testing, maintaining high code quality. Proactively troubleshoot and resolve technical issues, providing excellent support to customers. You're ideal for this role if you have: At least 6 years of experience in software development. Strong experience in Kotlin, with Java knowledge and willingness to learn Kotlin. Hands-on experience with API development, SQL/databases, HTML/Javascript. Proficiency in collaboration tools such as Bitbucket, Jira, and Confluence. Solid understanding of microservice architecture and modern coding techniques. Agile methodology experience, including working with Jira and Confluence. Strong analytical and troubleshooting skills. Excellent interpersonal skills. Fluent in English (B2+ level). It is a strong plus if you have: (optional) Good working knowledge of cloud technologies like AWS, Azure, or GCP. Experience building CI/CD pipelines using Jenkins. Background in Systems Administration on Linux/AIX/WAS platforms. Language Required for the role: Fluent English (B2+ 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.

🏢 Summary: Backend Developer role focused on designing, building, and maintaining scalable Java and Kotlin-based applications and microservices within an international team. The position involves developing high-quality backend systems, collaborating with cross-functional teams, and optimizing distributed systems performance. The role emphasizes clean code, modern frameworks, and agile delivery practices. 🗂️ Requirements: 5+ years of backend development experience with Java 8+ and Kotlin, Strong knowledge of Spring Framework and Spring Boot, Experience building RESTful APIs and microservices, Experience with SQL and NoSQL databases, Understanding of Agile/Scrum methodologies 📃 Skills: Java, Kotlin, Spring, SpringBoot, REST, Microservices, SQL, NoSQL, PostgreSQL, MongoDB, Agile, Scrum 🏢 Description: We are looking for skilled Java & Kotlin Developers to join our growing technology team in Poland. As part of an international development group, you’ll design, build, and maintain scalable backend systems using Java and modern frameworks. You’ll collaborate closely with cross-functional teams to deliver high-quality, reliable, and efficient software solutions. Key Responsibilities Design, develop, and maintain Java-based applications and microservices. Write clean, efficient, and testable code following best practices and coding standards. Collaborate with front-end developers , DevOps engineers , and QA teams to ensure seamless integration and delivery. Participate in code reviews , architecture discussions, and agile ceremonies. Contribute to technical documentation and continuous improvement of development processes. Troubleshoot and optimize performance across distributed systems. Requirements 5+ years of experience in backend development using Java 8+ Kotlin . Strong understanding of Spring Framework / Spring Boot . Experience with RESTful APIs , microservices , and SQL / NoSQL databases (e.g., PostgreSQL, MongoDB). Knowledge of Agile / Scrum methodologies. Good command of English (B2 or higher) – Polish language skills are a plus. Nice to Have Experience with cloud platforms (AWS, Azure, or GCP). Familiarity with message brokers (Kafka, RabbitMQ). Knowledge of unit testing and test automation frameworks (JUnit, Mockito). Interest in DevOps or system design concepts. How to Apply If you’re passionate about building high-quality Java applications and want to be part of a dynamic engineering team, send your CV

🏢 Summary: Senior Java Developer role focused on designing and building scalable APIs and microservices within a cloud-native environment, contributing to high-performance backend systems and seamless platform integrations. The position involves working in an Agile CI/CD setup to deliver robust, compliant, and scalable digital solutions. Hybrid work model based in Kraków. 🗂️ Requirements: 5+ years of experience in software development, Strong experience with Java, Strong experience with Kotlin, Experience in building APIs, Experience with SQL and databases, Experience with HTML, Experience with JavaScript, Understanding of microservices architecture, Experience working in Agile environment, Experience with Jira, Experience with Confluence, Fluent English (B2+), Legal right to work in the EU 📃 Skills: Java, Kotlin, SQL, HTML, JavaScript, Microservices, API, Agile, Jira, Confluence, AWS, Azure, GCP, Jenkins, Linux, AIX, WAS, CI/CD 🏢 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.

🏢 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.

🏢 Summary: Junior Java/Kotlin Developer role focused on building and maintaining microservices for a large telecommunications project, with training in Salesforce and cloud technologies. The position involves working in an Agile team using modern backend technologies and contributing to API integrations and SaaS platforms. Hybrid work model with collaboration across international teams. 🗂️ Requirements: Hands-on experience with Java, Foundational knowledge of Kotlin, Basic experience with Spring Boot, Experience with RESTful APIs, Familiarity with Google Cloud Platform, Working knowledge of SQL, Working knowledge of Git, Willingness to learn and work with Salesforce, Ability to communicate in English (B2+) 📃 Skills: Java, Kotlin, Spring, SpringBoot, REST, GCP, SQL, Git, Salesforce, CPQ, Zuora, Microservices, Agile 🏢 Description: We are looking for an ambitious Junior Java/Kotlin Developer , eager to learn and work with Salesforce, to join our team. In this role, you’ll be trained and mentored while contributing to a major telecommunications project for a global technology leader, working with modern technologies like Java, Kotlin, Spring, and Google Cloud Platform. You’ll collaborate closely with a diverse team in a dynamic, Agile environment, focusing on microservices, API integrations, and SaaS products such as Salesforce and Zuora. This role offers a hybrid model, with 3 days per week working from the client's office in Gdansk, Krakow, Warsaw or Wroclaw. While standard Polish business hours apply, occasional flexibility for evening meetings (e.g., around 18:00) to coordinate with US teams is required. If you’re passionate about launching your career in a top-tier engineering setting, this is the perfect opportunity for you. Responsibilities Learn and grow under the guidance of senior engineers developing a strong understanding of the project’s domain architecture and codebase Assist in developing testing and maintain microservices using Java and Kotlin Onboard to Salesforce especially Salesforce CPQ for product management tasks Write clean maintainable and well-tested code for assigned features and bug fixes Participate in code reviews and collaborate with the team in all Agile ceremonies Help troubleshoot and resolve technical issues with mentor support Contribute to team documentation and knowledge sharing Proactively tackle a steep learning curve and adapt quickly to complex large-scale systems and cloud technologies Requirements Hands-on experience with Java and foundational knowledge of Kotlin Basic experience with Spring Boot and RESTful APIs Familiarity with Google Cloud Platform (GCP) Working knowledge of SQL and Git Eagerness to learn and work with Salesforce and other SaaS products Strong desire to learn grow and adapt quickly in a fast-paced environment Good communication and teamwork skills Willingness to occasionally adjust working hours for collaboration with international teams Ability to communicate effectively in English both spoken and written for daily collaboration We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Java Developer role focused on designing and building scalable APIs and microservices within a cloud-native environment. The position involves developing high-performance backend solutions in Java and Kotlin, ensuring seamless integrations, and working in an agile CI/CD setup. It offers the opportunity to shape robust microservice architectures and drive operational excellence. 🗂️ Requirements: 5+ years of software development experience, Strong experience with Java, Strong experience with Kotlin, Proven expertise in API development, Experience with SQL and databases, Knowledge of HTML and JavaScript, Understanding of microservices architecture, Experience working in Agile environments, Experience with Jira and Confluence, Strong troubleshooting and analytical skills, Fluent English (B2+), Legal right to work in the European Union 📃 Skills: Java, Kotlin, API, SQL, HTML, JavaScript, Microservices, Jira, Confluence, CI/CD, Jenkins, AWS, Azure, GCP, Linux, AIX, WAS 🏢 Description: Unleash innovation — master scalable APIs and Microservices to transform digital ecosystems! As a Senior Java Developer – API & Microservices Expert, you will be working on building cloud-native platforms focused on streamlining software development and 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. Quick Facts: - Hybrid work model 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: - 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

🏢 Summary: Mid-Level Java Backend Developer role focused on maintaining and enhancing enterprise applications within a Shared Services environment using modern Java and microservices architecture. The position involves developing Java-based microservices, managing CI/CD pipelines, and supporting deployments to ensure scalable and efficient business processes. Hybrid work model based in Krakow. 🗂️ Requirements: Minimum 3 years of Java development experience, Strong knowledge of Java 8+, Strong knowledge of Spring framework, Experience with Concurrency and Multithreading, Experience with microservices architecture, Experience with Jenkins for deployments, Proficiency with basic Linux commands, Hands-on experience with Git, Hands-on experience with Maven, Communicative English level, Legal right to work in the European Union 📃 Skills: Java, Spring, Microservices, Jenkins, Git, Maven, Linux, Concurrency, Multithreading, CI/CD 🏢 Description: Ignite innovation — Transform enterprise applications with modern Java microservices! Krakow-based opportunity with hybrid work model. As a Mid-Level Java Backend Developer , you will be working for our client to support critical shared services by maintaining and enhancing enterprise applications. This role involves leveraging modern Java technologies and microservices architecture to drive efficiency, agility, and scalability in business processes. Your main responsibilities: Maintaining and enhancing applications within the Shared Services environment Developing and maintaining Java-based microservices Implementing deployments using Jenkins and managing CI/CD pipelines Working with version control systems and build tools such as Git and Maven Applying basic Linux shell commands to support deployment and server management You're ideal for this role if you have: At least 3 years of experience in Java development Strong knowledge of Java 8+ and Spring framework (Spring Context, DI, IoC) Experience with Concurrency and Multithreading Microservices architecture experience Knowledge of Jenkins for deployment processes Basic Linux commands proficiency (find, ls, grep, sed) Hands-on experience with Git and Maven It is a strong plus if you have: Kubernetes experience CI/CD pipeline knowledge, including Helm Deployment strategies such as canary and blue-green Familiarity with testing frameworks like Mockito Event-Driven Development experience Language Required for the role: Communicative level of English 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.

🏢 Summary: Mid-Level Java API Developer role focused on designing, building, and maintaining secure, scalable APIs and backend services for digital banking platforms using Java and cloud-native architecture. The position involves developing event-driven services, integrating with internal and third-party systems, and deploying solutions on AWS. You will collaborate within a cross-functional team to deliver high-quality, resilient, and well-documented API solutions. 🗂️ Requirements: Minimum 4 years of experience building APIs and backend services in Java, Strong experience with Spring Boot, Experience with Maven build tool, Solid understanding of backend architecture and service design, Knowledge of REST, GraphQL, and SOAP standards, Experience integrating APIs and handling JSON and XML data formats, Ability to develop and support event-driven services with Kafka, Experience building cloud-ready services on AWS, Ability to write automated tests and perform API testing, Experience with OpenAPI/Swagger documentation, Good command of English, Legal right to work in the European Union 📃 Skills: Java, Spring, Maven, REST, GraphQL, SOAP, Kafka, AWS, Kubernetes, EKS, Fargate, Redis, RDS, S3, Route53, JSON, XML, Postman, Swagger, OpenAPI, SoapUI, IntelliJ 🏢 Description: 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.

🏢 Summary: B2B opportunity for a Kotlin/Java Developer to build and enhance an internal engineering platform for a large financial services organization. The role focuses on developing modern web applications and APIs within a microservices architecture in an Agile, CI/CD-driven environment. It involves backend development, selected UI work, and close collaboration with cross-functional teams. 🗂️ Requirements: Commercial experience with Kotlin or Java, Hands-on experience in at least two: API development, SQL/databases, HTML/JavaScript, Understanding of microservices architecture, Experience with Jira, Confluence, Bitbucket, Ability to work in Agile and CI/CD environment, English proficiency at B2+ level 📃 Skills: Kotlin, Java, SQL, HTML, JavaScript, Microservices, Jira, Confluence, Bitbucket, Jenkins, AWS, Azure, GCP, Linux, AIX, WAS, CI/CD 🏢 Description: 📍 Location: Kraków, Poland (hybrid - 6 days per month in the office)📄 B2B Contract: 180 - 230 PLN / hour We are looking for a Kotlin / Java Developer to join an international project delivered for a large organization within the financial services sector. The team is building an internal engineering platform that supports development teams in managing software development standards, quality controls and compliance across the organization. This role involves working on modern web applications and APIs built with Kotlin and Java, based on a microservices architecture. The scope of responsibilities will be adjusted to the candidate’s experience and technical profile. Key Responsibilities: Collaborate with developers, testers and business stakeholders to build and operate internal products. Design, develop and implement backend features and selected UI components according to backlog priorities. Build and maintain APIs and microservices that address real business and engineering challenges. Work closely with the wider engineering team to design and deliver new features. Proactively engage with internal users to resolve issues and respond to feature requests. Contribute within an Agile, CI/CD-driven environment enabling frequent and stable releases. Participate in code reviews and support quality through testing, including automated test scripts. Requirements: Commercial experience with Kotlin, or Java with a strong willingness to learn Kotlin. Hands-on experience in at least 2 of the following areas: API development, SQL / databases, HTML / JavaScript. Experience working with collaboration tools such as Jira, Confluence and Bitbucket. Solid understanding of microservices architecture. Strong analytical and troubleshooting skills. Good communication and collaboration skills. English proficiency at B2+ level. Nice to Have: Experience with Jenkins and CI/CD pipeline design. Knowledge of test automation practices. Familiarity with cloud platforms such as AWS, Azure or GCP. Background in system administration (Linux / AIX / WAS). What We Offer: Long-term cooperation on an enterprise-scale international project. Exposure to modern technologies and microservices-based architectures. Real influence on the development of internal engineering platforms. Access to internal trainings, workshops and technical knowledge-sharing sessions. Private medical care (LuxMed) & Multisport card. Collaboration with experienced, international engineering teams. Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams.