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Java Backend Developer Location: Krakow, hybrid 3 days/week Contract: B2B Experience: 10–12 years About the Role: We are looking for a skilled Java Backend Developer to join our team and contribute to building modern, scalable backend systems. You will be working with Java 17, Spring Framework , and other cutting-edge technologies to develop and optimize microservices architectures. If you're passionate about clean code, performance tuning, and distributed systems, we’d love to hear from... (więcej)
- Design and develop robust backend applications using Java 17 and Spring Framework 5
- Work with distributed microservices architectures
- Design and implement RESTful APIs and integrate with frontend systems
- Manage relational (SQL) and NoSQL databases (PostgreSQL, MongoDB, etc.)
- Apply SOLID principles, Clean Code practices, and Domain-Driven Design (DDD)
- Collaborate with cross-functional teams using Agile methodology
- Optimize application performance and scalability for high-traffic ...
- 10–12 years of experience in Java development
- Expertise in Spring Framework (5), Spring Boot, and Java 17
- Strong understanding of microservices architectures
- Proficiency with relational (PostgreSQL, MySQL) and NoSQL databases (MongoDB, Cassandra)
- Deep knowledge of SOLID principles, Clean Code, and Domain-Driven Design (DDD)
- Hands-on experience with CI/CD pipelines and DevOps practices
- Familiarity with cloud technologies (AWS, Azure, or GCP) and Kubernetes
- Experience with ...
- Nice to Have:
- Experience with Kafka, RabbitMQ, or other messaging queues
- Knowledge of Reactive Programming (Spring WebFlux, Project Reactor)
- Familiarity with monitoring tools (Prometheus, Grafana)
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4938 Our client builds a leading digital identity and fraud prevention platform used by banks, fintech companies, online marketplaces, and other regulated businesses worldwide. Their products combine biometric identity verification, document and image processing, and advanced fraud detection to help customers balance frictionless digital experiences with strong security and regulatory compliance. The company relies on AI, machine learning, and computer vision to power identity verification,... (więcej)
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You will join a high-performing team of software engineers, with the ability to work on the backend or full stack, but primarily working on the backend, and taking responsibility for implementing a range of new application features, as well as improving the architecture, performance, scalability, and resilience of the existing product. Responsibilities Design and implement clean, modular, scalable, and testable code for the Java backend. Conducting performance analysis and profiling for backend... (więcej)
- Design and implement clean, modular, scalable, and testable code for the Java backend.
- Conduct performance analysis and profiling for backend systems and databases, ensuring the system’s scalability and high performance.
- Apply advanced testing and debugging methods to resolve complex software issues.
- Work collaboratively with local and distributed teams in an Agile environment to continuously enhance product functionality.
- Required Skills and Qualifications:
- 5 years of hands-on backend software development, with an in-depth knowledge of core Java/JDK.
- Solid understanding of software architecture, design patterns, and core software engineering principles.
- Experience designing and implementing high-performance, multithreaded, state-driven systems.
- Proficiency in creating meaningful automated tests (we use JUnit) and applying advanced testing and debugging techniques.
- In-depth knowledge of relational ...
- Contract of Employment (UoP).
- Private medical coverage.
- Multisport.
- Life insurance (two annual incomes).
- Employee Stock Purchase Plan – 15% discount for buying Motorola’s Stock units.
- Employee Pension Plan – 3.5% of the month’s salary gross, which goes to the retirement account.
- IP Tax Relief (up to 80%).
- Yearly salary increase (depends on individual performance).
- Yearly bonus (depends on company performance).
- Flexible working hours (usually the day starts between ...
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Unleash the Power of Innovation — Drive the Future of Payment Platforms! Krakow-based opportunity with hybrid work model. As a Senior Java & DevOps Backend Engineer , you will be working for our client, a leader in global payment solutions. You will play a crucial role in developing and maintaining the Global Disbursements platform, enabling seamless, fast, and secure international fund transfers. Join us to help shape financial technology that empowers businesses and consumers worldwide. Your... (więcej)
- Resolve blockers for the development team to ensure smooth project progress.
- Maintain effective communication with technical architects and management to update on project status, challenges, and solutions.
- Collaborate with QA teams to guarantee all quality gates are met before deployment.
- Develop comprehensive production support documentation including walkthroughs.
- Prepare and manage release checklists to ensure successful deployments.
- At least 5 years of experience in backend development within the Payments or Financial Tech industry.
- Strong knowledge of Cloud Native Technologies such as Kubernetes, Docker, Kafka, and Istio Service Mesh.
- Hands-on experience with Bash/Shell, Groovy or Java, Unix/Linux, Jenkins, and GitHub.
- Proven ability to design, build, and maintain distributed containerized platforms.
- Expertise in creating CICD pipelines for automated deployments.
- Excellent analytical, problem-solving, and ...
- Stable and long-term cooperation with attractive conditions.
- Opportunities to develop your technical expertise across various industries and technologies.
- The chance to work on high-impact, strategic IT and digital transformation projects.
- A clear career path and the opportunity to grow quickly by contributing to diverse client initiatives over time.
- International environment, knowledge sharing, social events, and training opportunities.
- Access to an attractive medical package.
- ...
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N-iX is a global software development company founded in 2002, connecting over 2,400 tech professionals across 40 countries. We deliver innovative technology solutions in cloud computing, data analytics, AI, embedded software,IoT, and more to global industry leaders and Fortune 500 companies. Join us to create technology that drives real change for businesses and people across the world. We are looking for talented Senior Software Engineer to join our AI project in Europe. Responsibilities:... (więcej)
- Design and develop a robust and extensible Kotlin framework and platform for configuring and managing AI agents
- Write clean, maintainable, and efficient code that complies with our coding standards
- Ensure the performance, quality, and responsiveness of the framework/platform
- Identify and correct bottlenecks and errors
- Help to maintain code quality, organization, and automatization
- Create and maintain technical documentation for the framework/platform
- At least 5 years of proficiency in Kotlin or Java
- Deep experience with the Spring Framework
- Reactive tools experience (Project Reactor)
- Knowledge of different communication protocols such as REST, GraphQL, gRPC
- Experience with distributed systems
- Familiarity with tracing, metrics and monitoring best practices
- Experience of creating frameworks and platforms for other developers
- Proficiency in Maven or similar tools
- Familiarity with NoSQL databases
- Very good spoken and written ...
- Opportunity to work on innovative technology solutions
- Join a global team of over 2,400 tech professionals
- Contribute to projects for global industry leaders and Fortune 500 companies
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We're seeking a Software Java Engineer with 5 years of experience to help build and scale the backend services that power our content discovery, licensing, and delivery platforms across all of our content libraries. You'll join a team that's passionate about clean architecture, performance, and solving complex challenges at scale. If you thrive in a collaborative environment and love building robust APIs, data-driven systems, and data modeling we'd love to hear from you. What You'll Do: Design,... (więcej)
- Design, implement, and maintain backend services using Java, Spring Boot, and the broader Spring ecosystem.
- Build and evolve RESTful APIs that power content metadata, search, recommendation, and licensing workflows.
- Work with Kafka to build event-driven and real-time processing systems.
- Use SQL and work with relational databases to support structured content metadata.
- Partner with data and analytics teams to model data in data warehouses, supporting reporting and analytics use cases. -...
- 5 years of professional backend development experience.
- Strong proficiency in Java, with experience using Spring Boot and Spring Framework.
- Experience designing and consuming REST APIs.
- Familiarity with Kafka or other message streaming platforms.
- Solid understanding of relational databases and writing optimized SQL.
- Comfortable working with GraphQL.
- Exposure to Python or willingness to learn.
- A collaborative mindset with strong communication skills.
- A passion for clean code, ...
- Flexible working format - remote, office-based or flexible.
- A competitive salary and good compensation package.
- Personalized career growth.
- Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more).
- Active tech communities with regular knowledge sharing.
- Education reimbursement.
- Memorable anniversary presents.
- Corporate events and team buildings.
- Other location-specific benefits.
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More about this role Everything you need to know. Overview Senior Software Engineer (Java/Kotlin) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest... (więcej)
- Build and evolve backend components that form the core of a new Loyalty Platform, using Java and Spring.
- Lead the delivery of backend solutions, contributing from early technical discovery through implementation and live operation.
- Work closely with product and engineering partners to shape requirements and turn them into robust, scalable services.
- Influence platform architecture and technical standards as the system is being designed and grown from the ground up.
- Maintain a strong ...
- Extensive hands-on experience delivering backend solutions in Java, with exposure to Kotlin in commercial or production settings.
- Strong practical knowledge of the Spring framework, with the ability to apply common design patterns to solve complex engineering problems.
- Experience designing backend systems with scalability and maintainability in mind, including service-based and distributed architectures.
- Practical experience working in AWS environments, covering application deployment, ...
- Private medical healthcare at LUXMED (including dental care) for you and your family.
- Child Insurance InterRisk - insurance for children.
- Medicover sports card (Fit&More package).
- Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification.
- Life insurance at Generali financed by the employer.
- Opportunity to earn an annual bonus that aligns to work level of role.
- Parking spaces and LOTOS card.
- Co-financing of ...
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More about this role Everything you need to know. Overview Senior Quality Engineer (Java) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of... (więcej)
- Design, implement, and maintain automated test solutions to ensure high quality across backend services and platform components.
- Define and evolve the overall test automation strategy, frameworks, and standards in collaboration with the wider engineering team.
- Work closely with backend engineers and product stakeholders to embed quality practices throughout the development lifecycle.
- Develop and execute automated tests across different levels, including API, integration, and end-to-end ...
- Strong experience in test automation using Java, with Kotlin exposure considered a strong advantage.
- Proven hands-on experience in API testing, including designing and maintaining automated tests for RESTful services.
- Practical knowledge of Rest Assured or similar frameworks for validating backend APIs.
- Solid understanding of software testing principles, including test design, test coverage, and defect prevention.
- Experience working with automated test suites integrated into CI/CD ...
- Private medical healthcare at LUXMED (including dental care) for you and your family.
- Child Insurance InterRisk - insurance for children.
- Medicover sports card (Fit&More package).
- Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification.
- Life insurance at Generali financed by the employer.
- Opportunity to earn an annual bonus that aligns to work level of role.
- Parking spaces and LOTOS card.
- Co-financing of ...
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More about this role Everything you need to know. Overview Senior Software Engineer (Java) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of... (więcej)
- Design, build, and maintain secure, scalable backend services, taking solutions from concept through to production.
- Work closely with product, security, and engineering stakeholders to deliver high-value authentication and platform capabilities.
- Contribute to system and architecture design, participating in code and quality reviews to maintain high engineering standards.
- Apply DevOps and Agile practices, including automated testing, continuous integration, and frequent, reliable ...
- Strong commercial experience in Java, with proven expertise in building production-grade backend systems using Spring / Spring Boot.
- Extensive experience designing and developing scalable, secure services in complex, distributed environments.
- Solid understanding of authentication and authorization concepts, with hands-on experience using OAuth 2.0 and JWT.
- Experience working with APIs and integrating backend services within a wider platform ecosystem.
- Strong knowledge of software ...
- Private medical healthcare at LUXMED (including dental care) for you and your family.
- Child Insurance InterRisk - insurance for children.
- Medicover sports card (Fit&More package).
- Language courses, accounting courses, access to LinkedIn Learning, and the possibility of co-financing studies and certification.
- Life insurance at Generali financed by the employer.
- Opportunity to earn an annual bonus that aligns to work level of role.
- Parking spaces and LOTOS card.
- Co-financing of ...
Senior Software Java Engineer microservices Kubernetes
17 dni temu przez ANTAL Sp. z o.o.
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Location: Krakow / Warsaw (hybrid; 2 days in the office per week) B2B: 170 - 200 PLN/h Industry: Financial Services / Payment Platforms Join the team developing an innovative payment platform, enabling fast and secure global fund transfers, supplier payments, payroll, tax payments, and multi-channel money transfers. Your role will focus on high-quality design and documentation of microservices, effective stakeholder management, and close collaboration with DevOps teams to support project... (więcej)
- Create and update API/microservice design and documentation
- Review and approve user stories and low-level designs prepared by Tech Architects
- Conduct code reviews and ensure coding standards and architectural principles are followed
- Collaborate with IT BAs to create project plans and ensure adherence
- Organize and lead code review sessions with the management team
- Deliver high-quality design artifacts supporting DevOps teams
- At least 5 years of experience in backend engineering (Java)
- Experience with cloud-native technologies: Kubernetes, Docker, Kafka
- Strong knowledge of traditional technologies: Unix/Linux, GitHub
- Experience designing, building, and maintaining distributed, containerized platforms
- Ability to deliver and maintain CI/CD pipelines for automated deployments
- Experience in code reviews and ensuring compliance with system architecture and coding standards
- Experience working in Agile / ...
- Work on a large, scalable payment platform with real impact on architecture and processes
- Long-term cooperation in a stable enterprise environment
- Hybrid work model (Krakow / Warsaw)
- Luxmed healthcare package and Multisport card
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LoopMe is the leading in-app monetization and programmatic advertising platform. We reach a mobile audience of over 900 million monthly unique users globally and process over 200 billion ad requests. The Chartboost SDK is the highest-integrated independent mobile ad SDK, and through the Chartboost Exchange, Ad Network and other services, we empower mobile app developers to build businesses while connecting advertisers to highly engaged audiences. What we need We are looking for a backend... (więcej)
- Responsible for design, implementation and testing the functionality of our Exchange product
- Help translate our advertising exchange from Scala to Java
- Work effectively with other engineers, system architects, and Operations teams to implement enhancements and issue resolutions
- Participate in technical discussions; come up with innovative ways to improve the product and process
- Troubleshoot issues with the application, technologies, and infrastructure
- Continuously improve your ...
- BS in Computer Science or related field
- 1 year of Scala programming experience
- 2 years of Java programming experience
- 6 years of software engineering experience
- Understanding of microservices and hands-on experience implementing them
- Experience with software development in high-capacity, high-traffic, high-availability websites/systems
- Experience working with Agile development The following experience would be a plus:
- Advertising technology experience
- Experience with Python...
- International work environment
- Flexible working schedule with a hybrid working model (3 days from the office)
- Annual performance bonus (up to 8%)
- One month of workation (work from any location worldwide for one month)
- Multikafeteria
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Senior Software Engineer (Java / Microservices) Corporate & Institutional Banking Client Services Hybrid working model Kraków : up to 5 days per month from the office Warsaw : up to 3 days per month from the office Other locations in Poland : 1 day per month or 3 days per quarter Your career opportunity Within Corporate and Institutional Banking Client Services , we are building in-house engineering platforms that support customer onboarding and KYC / Customer Due Diligence processes at global... (więcej)
- Work closely with CIB Client Services Engineering Leadership, contributing to architectural and technical decisions across Customer Due Diligence platforms.
- Design and build microservice-based solutions, partnering with Product and Business teams to assess impact, complexity, and risk of change.
- Lead by example as a hands-on engineer, delivering high-quality code to production at high cadence.
- Take ownership beyond implementation — proactively identifying risks, technical debt, and ...
- Strong hands-on experience in backend software engineering, delivering production systems in complex environments.
- Proven experience designing and evolving microservice architectures, with frequent and reliable production releases.
- Deep understanding of non-breaking change principles, especially in the design of RESTful APIs.
- Solid, recent experience with Java (preferably Java 17).
- Experience designing and managing PostgreSQL schemas in production systems.
- Exposure to technical ...
- Support from a dedicated Consultant throughout the recruitment process.
- Regular contact via email or phone to help prepare for interviews.
- A smooth and professional recruitment experience.
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O projekcie Dołączysz do zespołu budującego nowoczesną platformę płatniczą nowej generacji dla dużej instytucji finansowej. Tworzymy lekki, skalowalny silnik przetwarzania płatności, który pozwala szybko wdrażać nowe funkcjonalności biznesowe i modernizować istniejący ekosystem płatności. Platforma jest projektowana jako wysoce dostępna, odporna na awarie i gotowa do pracy w środowisku chmurowym. Rozwiązanie opiera się na ponownym wykorzystaniu sprawdzonych komponentów,... (więcej)
- Projektowanie i rozwój nowej architektury płatniczej.
- Tworzenie wysokiej jakości kodu i testów jednostkowych/integracyjnych.
- Zapewnienie wysokiej dostępności, niezawodności i bezpieczeństwa systemów.
- Wsparcie transformacji istniejącego środowiska płatniczego.
- Rozwiązywanie problemów architektonicznych i blokad technicznych.
- Współpraca z zespołami DevOps nad CI/CD i automatyzacją infrastruktury.
- Prowadzenie analiz technicznych i studiów wykonalności.
- Mentoring ...
- Minimum 8 lat doświadczenia jako Backend Engineer.
- Bardzo dobra znajomość Java i Spring Boot.
- Doświadczenie w projektowaniu i implementacji mikroserwisów oraz systemów rozproszonych.
- Doświadczenie z Kafka, Docker, Kubernetes.
- Znajomość rozwiązań chmurowych i DevOps/DevSecOps.
- Umiejętność projektowania systemów wysoko dostępnych i odpornych na awarie.
- Bardzo dobra znajomość języka angielskiego.
Mile widziane
- Doświadczenie w instytucjach finansowych, ...
- Stabilność i długofalowa współpraca – około 25% załogi to osoby pracujące już ponad 5 lat.
- Możliwość zmiany projektu i rozwijania swoich kompetencji.
- Praca w zespole inżynierów z średnim doświadczeniem wynoszącym 11 lat.
- Knowledge sharing i rozwój poprzez organizację Talk4Devs, meet’upy oraz przestrzeń do budowania marki osobistej.
- Możliwość dołączenia do Gildii Technologicznej lub stworzenia własnej.
- Dbanie o work-life balance, co potwierdza certyfikat ...
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We’re looking for a Senior Java Engineer with Python&Golang skills to join our team. About Us: Our client is defining the future of cybersecurity through our XDR platform that automatically prevents, detects, and responds to threats in real time. Singularity XDR ingests data and leverages our patented AI models to deliver autonomous protection. With the Client, organizations gain full transparency into everything happening across the network at machine speed – to defeat every attack at every... (więcej)
- Design, develop and support backend system serving for endpoint security.
- Assist with initiatives around moving services to a new deployment model.
- Tune and adjust services to work with new CPU architectures.
- Improve the observability for services.
Responsibilities
- Cross-Team Collaboration: Work closely with product, validation, and front-end engineering teams to deliver and maintain high-quality features.
- Code Quality and Maintenance: Write clean, maintainable code. Stay ...
- 7 years of extensive software engineering experience, including proven expertise in developing large-scale distributed systems and microservices architecture, with a focus on performance, scalability, and reliability.
- Proficiency in Java, Golang, and Python.
- Experience with cloud platforms (AWS and/or GCP) and Kubernetes (must).
- Experience with Kafka or similar solutions is a plus.
- Excellent problem-solving skills.
- Strong communication skills and ability to articulate technical ...
- Flexible working format - remote, office-based, or flexible.
- A competitive salary and good compensation package.
- Personalized career growth.
- Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more).
- Active tech communities with regular knowledge sharing.
- Education reimbursement.
- Memorable anniversary presents.
- Corporate events and team buildings.
- Other location-specific benefits.
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Poszukujemy osoby doświadczonej w roli Senior Java Developer (7y) / Software Engineer , która dołączy do zespołów realizujących nowoczesne, skalowalne rozwiązania. Zakres obowiązków Projektowanie, architektura oraz wdrażanie nowoczesnych rozwiązań backendowych Dobór i implementacja narzędzi, frameworków oraz wzorców architektonicznych Budowanie skalowalnych i niezawodnych systemów rozproszonych Aktywne śledzenie trendów technologicznych i wdrażanie innowacyjnych rozwiązań... (więcej)
- Projektowanie, architektura oraz wdrażanie nowoczesnych rozwiązań backendowych
- Dobór i implementacja narzędzi, frameworków oraz wzorców architektonicznych
- Budowanie skalowalnych i niezawodnych systemów rozproszonych
- Aktywne śledzenie trendów technologicznych i wdrażanie innowacyjnych rozwiązań
- Dzielenie się wiedzą i dobrymi praktykami w zespole oraz w organizacji
- Praca w zespołach Agile (Scrum), udział w planowaniu i refinementach
- Dbałość o jakość kodu, testy ...
Must have
- Bardzo dobra znajomość Java (7y)
- Doświadczenie w pracy z Apache Kafka
- Praktyczna znajomość Kubernetes
- Frameworki: Spring / Spring Boot
- Doświadczenie z ORM: Hibernate, MyBatis
- Praca z relacyjnymi i/lub NoSQL bazami danych
- Doświadczenie w pracy z chmurą (minimum jedna z): AWS / Google Cloud / Azure / OpenShift
Nice to have
- Frontend: ReactJS / Redux, React Native, Angular
- Konteneryzacja: Docker
- Wyszukiwarki i silniki indeksujące: ElasticSearch, SOLR
- ...
(No benefits information provided in the original text.)
(więcej)