Senior Java Developer

🏢 Summary: Senior Java Developer role in a greenfield fintech project focused on building a large-scale banking platform from scratch. The position involves designing and developing core backend microservices, shaping architecture, and contributing to technical decisions within a cross-functional agile team. The offer provides real impact on architecture and engineering standards in an event-driven, microservices-based environment. 🗂️ Requirements: Minimum 6 years of commercial software development experience, Strong hands-on experience with Java, Very good knowledge of Spring Boot, Spring MVC, Spring Cloud, Experience with event-driven architectures and asynchronous processing, Experience with microservices architecture, Practical experience with PostgreSQL or other relational databases, Understanding of frontend architecture and React concepts, Experience working in Agile/Scrum methodology, Fluent English, spoken and written 📃 Skills: Java, Spring, SpringBoot, SpringMVC, SpringCloud, Microservices, PostgreSQL, React, Kafka, GCP, Kubernetes, SQL, REST, Agile, Scrum 🏢 Description: Salary: 1000 - 1300 PLN/MD on B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (2 days per week from the office) Why choose this offer? Opportunity to build a fintech platform from scratch (greenfield project) Real impact on architecture and core frontend services from day one Collaboration within a cross-functional, international team Work on a large-scale financial platform in the banking domain Project We are building a new fintech platform from the ground up for a financial institution operating in the banking products space. As a Senior Java Developer , you will join a cross-functional squad (backend and frontend developers, QA, Business Analyst) and work on designing and developing core backend components. This is a greenfield initiative , where architecture, standards, and development patterns are defined from day one. Senior engineers play an active role in shaping technical direction and ensuring high code quality. You will work closely with Delivery Manager in an agile setup. Responsibilities you'll have: Design, develop, and maintain backend services using Java Build and evolve microservices based on the Spring ecosystem Work with event-driven and asynchronous communication patterns Collaborate closely with frontend and platform teams Actively participate in code reviews and ensure high engineering standards Contribute to architectural and technical decision-making Support and mentor less experienced developers Identify and address technical risks and bottlenecks Communicate technical topics effectively in English Expected competences and knowledge: Minimum 6 years of commercial experience in software development Strong hands-on expertise in Java Very good knowledge of Spring (Spring Boot, Spring MVC, Spring Cloud) Experience with event-driven architectures (message brokers, asynchronous processing, events) Practical experience with PostgreSQL or another relational database Experience working in microservices-based environments Understanding of frontend architecture and concepts , with particular focus on React (ability to collaborate efficiently with frontend developers, review high-level solutions, understand integration points and trade-offs) Familiarity with agile methodologies (Scrum / Agile) Fluent English (spoken and written) Nice to have: Experience with React Experience with Kafka or similar streaming platforms Familiarity with Google Cloud Platform (GCP) Experience with Kubernetes and containerized deployments Background in fintech or banking projects Previous work on greenfield systems Technologies you'll work with Java Spring (Boot, MVC, Cloud) PostgreSQL Event-driven architecture Microservices Nice to have: React Kafka GCP Kubernetes Client – why choose this particular client from the Jit portfolio? The client is a fintech institution operating in the Kingdom of Saudi Arabia, focused on modernising its digital capabilities and expanding its offering for micro-SME customers . It is an organisation with a strong market presence and a clear strategic commitment to innovation, aiming to deliver banking experiences that are fully digital, user-friendly, and deeply integrated with day-to-day business needs. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy. Wymagania Oczekujemy Oferujemy

🏢 Summary: Oferta dotyczy roli Senior Java Developera w projekcie obejmującym rozwój i modernizację backendowych aplikacji oraz integracji systemowych w architekturze event-driven. Osoba na tym stanowisku będzie projektować i rozwijać usługi w oparciu o Java 17+ i Spring Boot, pracując z rozwiązaniami messagingowymi oraz platformami event streamingowymi. Projekt realizowany jest w nowoczesnym środowisku technologicznym z naciskiem na transformację architektury i integrację systemów na dużą skalę. 🗂️ Requirements: Minimum 5 lat komercyjnego doświadczenia w programowaniu w Java, Bardzo dobra znajomość Java 17+, Bardzo dobra znajomość Spring Boot, Doświadczenie w projektowaniu i implementacji REST API, Znajomość wzorców integracyjnych, Znajomość architektury event-driven, Doświadczenie z platformami messagingowymi, Praktyczna znajomość Kafka, Doświadczenie z relacyjnymi bazami danych (PostgreSQL, MS SQL lub Oracle), Podstawowa wiedza z zakresu DevOps, Doświadczenie w pracy z Kubernetes, Doświadczenie w refaktoryzacji lub modernizacji aplikacji, Znajomość Git, Dobra znajomość języka angielskiego 📃 Skills: Java, Spring, SpringBoot, REST, Kafka, Confluent, PostgreSQL, MSSQL, Oracle, Kubernetes, Git, SQL, DevOps, Microservices, CI/CD, Cloud 🏢 Description: Nasz Klient to organizacja rozwijająca nowoczesne rozwiązania technologiczne wspierające kluczowe procesy biznesowe oraz integrację systemów w środowisku o dużej skali. Projekt koncentruje się na rozwoju i modernizacji aplikacji backendowych, budowie rozwiązań integracyjnych oraz wdrażaniu nowoczesnych architektur opartych o komunikację asynchroniczną i event-driven. Zakres współpracy obejmuje rozwój nowych funkcjonalności, integrację systemów oraz transformację istniejących rozwiązań technologicznych. Do realizacji projektu poszukiwana jest osoba do współpracy w roli Senior Java Developera. Istotnym obszarem współpracy będzie rozwój nowoczesnych usług backendowych oraz udział w inicjatywach związanych z modernizacją architektury aplikacyjnej. 📍 Tryb Współpracy: Warszawa – model hybrydowy (3 dni w tygodniu z biura) ⏱️ Dostępność: Poszukujemy osób dostępnych od zaraz lub z maksymalnie 1-miesięczną dostępnością 🧑‍💻 CZYM BĘDZIESZ SIĘ ZAJMOWAĆ? Projektowaniem i rozwijaniem aplikacji backendowych w oparciu o Java 17+ oraz Spring Boot Tworzeniem i rozwijaniem integracji pomiędzy systemami z wykorzystaniem REST API , komunikacji asynchronicznej oraz wzorców integracyjnych Udziałem w projektowaniu i implementacji architektury opartej o zdarzenia (event-driven) Rozwijaniem rozwiązań wykorzystujących platformy messagingowe i event streamingowe Modernizacją oraz refaktoryzacją istniejących aplikacji i komponentów systemowych Współpracą z zespołami technologicznymi przy projektowaniu i wdrażaniu nowych funkcjonalności Wspieraniem procesów wdrożeniowych oraz utrzymaniem wysokiej jakości dostarczanych rozwiązań 🔍 CZEGO OD CIEBIE OCZEKUJEMY? Must have: Minimum 5 lat doświadczenia komercyjnego w programowaniu w Java Bardzo dobra znajomość Java 17+ oraz Spring Boot Doświadczenie w projektowaniu i implementacji REST API Znajomość wzorców integracyjnych oraz architektury event-driven Doświadczenie z platformami messagingowymi i rozwiązaniami opartymi o event streaming Praktyczna znajomość Kafka (mile widziane doświadczenie z Confluent Kafka ) Doświadczenie w pracy z relacyjnymi bazami danych, takimi jak PostgreSQL , MS SQL lub Oracle Podstawowa wiedza z obszaru DevOps Doświadczenie w pracy z Kubernetes Doświadczenie związane z refaktoryzacją lub modernizacją istniejących aplikacji Znajomość Git oraz doświadczenie w pracy zespołowej z wykorzystaniem systemów kontroli wersji Dobra znajomość języka angielskiego Nice to have: Doświadczenie w środowiskach chmurowych Znajomość praktyk związanych z CI/CD Doświadczenie w pracy z architekturami mikroserwisowymi 🤝 DLACZEGO WARTO? Udział w inicjatywach związanych z transformacją i modernizacją architektury aplikacyjnej Projekt z architekturą event-driven oraz rozwiązaniami opartymi o Kafka Współpraca z doświadczonymi zespołami technologicznymi Realny wpływ na kierunek rozwoju rozwiązań oraz podejmowane decyzje techniczne Projekt realizowany w nowoczesnym środowisku technologicznym 📍 Dziękujemy za wszystkie zgłoszenia! Skontaktujemy się z wybranymi osobami. TQLO Sp. z o.o. – Agencja Zatrudnienia (nr KRAZ 33580)

🏢 Summary: Senior Java Developer role focused on building and enhancing POS and BackOffice retail solutions, including integrations, payments, reporting, and fiscalisation systems. The position involves designing scalable backend applications, supporting architectural decisions, and collaborating across teams on complex retail technology projects. Candidates will work with modern Java and Spring technologies in a technically demanding environment with opportunities for growth. 🗂️ Requirements: 5+ years of commercial IT experience, Very good knowledge of Java, Experience with Spring Boot, Experience with Spring Cloud, Experience with JPA, Experience with SQL, Understanding of backend application design, Experience with system integration, Experience designing scalable and maintainable solutions, Experience with relational databases, Query optimisation skills, Knowledge of Git, English B2 or higher, Ability to work independently on code, Team collaboration skills 📃 Skills: Java, Spring, SpringBoot, SpringCloud, JPA, SQL, Git, JDBC, SQLite, PostgreSQL, Tomcat, Wicket, JasperReports, Karate, Swing, Multithreading, CI/CD, GitLab 🏢 Description: We are looking for experienced Java Developers who want to grow their skills and work on interesting projects in the retail and sales technology area. You will be joining a team working on POS and BackOffice solutions supporting sales, store operations, integrations, reporting, payments, fiscalisation, and other retail-related processes. Your responsibilities Designing and developing efficient, scalable, and stable software. Participating in the design and implementation of new features. Supporting technical decision-making and selecting appropriate technologies and implementation approaches. Working on the optimisation of the software development process. Analysing technical requirements and proposing practical, maintainable solutions. Supporting integration design between POS, BackOffice, payment systems, fiscal devices, external platforms, and other retail systems. Taking ownership of complex technical topics and supporting the team in solving architectural or implementation challenges. Cooperating with developers, analysts, testers, product owners, and other stakeholders. Reviewing code and supporting good engineering practices within the team. Our requirements At least 5 years of commercial experience in IT. Very good knowledge of Java. Experience with Spring Boot, Spring Cloud, JPA, and SQL. Good understanding of backend application design and system integration. Experience in designing stable, maintainable, and scalable solutions. Ability to analyse business and technical requirements and translate them into clean technical solutions. Experience with relational databases and query optimisation. Practical knowledge of Git-based version control. English at B2 level or higher. Ability to write, understand, review, and maintain code independently, without relying on LLM-based tools - we do allow and encourage you use all kinds of tools, including AI, but we expect you to have a deep understanding of the results Good communication skills and the ability to work in a team. Responsibility for delivered solutions and a proactive approach to problem-solving. Nice to have Experience as a Tech Lead, Lead Developer, or Solution Architect. Experience in making or supporting architectural decisions. Experience with POS, retail, payments, fiscalisation, or enterprise sales systems. Experience with desktop applications or applications running in store environments. Knowledge of multithreading, performance optimisation, and offline-first systems. Awareness of web technologies Experience with CI/CD, GitLab pipelines, automated testing, or deployment processes. Technologies we use POS Java Multithreading Plain JDBC Web client used in integrations Swing for UI SQLite embedded database BackOffice Java 21 Spring JDBC Tomcat as a web application container Apache Wicket PostgreSQL JasperReports Karate We offer: Employment in a reputable organization (ITwiz BEST100), operating in accordance with international quality and security standards (ISO 9001, ISO 27001) A non-corporate atmosphere and a flat organizational structure Opportunities for continuous development through: working with a variety of technologies on projects for well-known clients collaboration with an experienced team of experts who are eager to share their knowledge co-financing of training and certifications Employee Referral Program Participation in charitable initiatives, including cooperation with the Joanna Radziwiłł Foundation “Opiekuńcze Skrzydła” and involvement in the “Gwiazdorzymy” holiday campaign Private healthcare (LUX MED), 50% co-financing of the Multisport card, co-financing of foreign language learning, and access to a wellbeing platform. A diverse and inclusive work environment – our company brings together representatives of four generations Equal development opportunities – 50% of managerial and leadership positions are held by women Organizational culture based on values: we act with good intentions we share knowledge we take responsibility we continuously improve people are our top priority we act with a clear sense of purpose and meaning we communicate honestly and professionally

🏢 Summary: Senior Java Backend Engineer role focused on building ultra-low-latency trading systems for equities, FX, and other asset classes at a top North American bank. The position involves developing high-performance backend services for algorithmic order management and order routing in a fully remote setup for Poland-based engineers. Candidates will work directly with trading and product teams on actively developed greenfield and semi-greenfield capital markets systems. 🗂️ Requirements: Current Java programming experience, Strong understanding of algorithms, complexity, multi-threading, and Java standard libraries, Good knowledge of Java collections framework and data structures, Experience building backend services for front-office trading systems, Understanding of front-office workflows and electronic trading platforms, Experience with algorithmic order management systems or order routing systems, Expertise in multi-threading, event-driven systems, and performance tuning, Knowledge of low-latency trading systems, Ability to design maintainable high-quality solutions, Strong communication skills, English proficiency, Ability to work with 6-hour overlap with US Eastern business hours, Residency and work authorization in Poland 📃 Skills: Java, Algorithms, Multithreading, Collections, Trading, Low-latency, Performance, Backend, Order-routing, OMS, FX, Equities, Microservices, Databases, Time-series 🏢 Description: Want to work on trading systems at a top N. American Bank This isn’t just another dev role. It’s your chance to engineer the core of global trading. We’re talking ultra-low-latency architectures, real-time market data, and automation at scale — all in an environment where milliseconds matter and billions move. You’ll work on greenfield and semi-greenfield projects, building trading systems for equities, options, FX (forex), and more. If you thrive on complexity, love solving performance challenges under pressure, and want to collaborate directly with traders and product teams at the sharp edge of financial technology, this is your arena. The Role at a Glance Senior Java Backend Engineer Building trading systems, including high-performance backend services for algorithmic order management and order routing (multiple projects & various asset classes) Fully remote for a top N. American bank (for residents of Poland only) Part of the core team - this is not a legacy support role or an outsourced B team This role requires experience building trading systems, ideally with order routing or algorithmic order management. Some capital markets experience is required. If you enjoy working on low-latency, high-throughput trading systems, join us and build the next generation of high-performance capital markets solutions. Why Join Us? Work on a large-scale, low-latency trading system . No Legacy: Join an actively developed system — the engineers who built it originally are still on the team. Collaborate with a world-class team of developers across North America and Europe. Enjoy the stability of a long-term, fully remote role that only a bank can offer. A successful candidate will be a very strong programmer with current Java development experience. They must also be curious, open-minded, and desire to learn new things. English proficiency is a must. This role is for developers who excel at programming core Java from the ground up, not just integrating frameworks or APIs. If you’re fascinated by understanding systems ‘under the hood,’ this role is for you. Successful candidates enjoy geeking out about data structures and debugging application performance issues. This is a fully remote backend Java development role for a developer in Poland . You will be working through a Polish company that will provide the support and administrative assistance to make you successful in the role. We are looking for people to join the team long-term. Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland, are welcome. What we offer Work that matters in the financial domain: You’ll be building a high-performance trading system at an established financial institution. Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment. Direct collaboration : You will work directly with the client team in North America and in Poland. 1st-tier work : This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team. Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term. Flexibility & remote work: Fully remote position based in Poland with increasing schedule flexibility post-onboarding. Competitive Compensation: Top pay and ample time-off options. Responsibilities Design and implement robust software solutions for equities and FX trading systems using core Java. Build high-performance backend services that algorithmically manage and route orders. Create thorough test cases to ensure software stability and reliability. Collaborate with operations teams regarding building new features and improving existing functionality. Requirements Must have Current Java programming experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries. Good knowledge of the data structures: familiarity with the Java collections framework, depth of understanding of the commonly used data structures, intuition on what to use when. Proven experience building backend services for front-office trading systems. Deep understanding of front-office workflows and electronic trading platforms (any asset class). Built or contributed to the algorithmic order management systems or order routing systems (any asset class). Expertise in multi-threading, event-driven systems, and performance tuning. Ability to break down complex workflows into maintainable, high-quality solutions. Strong communication skills and comfort working in high-stakes, trader-facing environments. Knowledge that is required for building low-latency (measured in microseconds) trading systems. Ability to align your work with a 6-hour overlap with US Eastern business hours. Nice to have Exposure to time-series databases and market data integration. Familiarity with algorithmic workflows and pricing engines. A computer science degree from a top Polish school. The recruitment process Submit your CV. Answer a few written questions and a short programming exercise which you can do at your own pace. Participate in a three-stage interview process: Written screen Technical screen interview Three technical interviews with future team members Discuss your experience and skills. Solve verbal algorithm problems (focus on clarity and understanding). Tackle live coding challenges (no trick questions). No take-home assignments – we respect your time. Successful candidates will need to pass a standard background check.

🏢 Summary: Senior Java Developer role focused on designing and building high-performance, scalable backend systems in a distributed microservices environment for the financial sector. The position involves developing REST APIs, processing large data volumes, and contributing to architecture and CI/CD in cloud-based environments. The role requires strong expertise in Java, Spring, distributed systems, and Kubernetes. 🗂️ Requirements: Minimum 10 years of software development experience, Very good knowledge of Java and Spring, Strong understanding of REST APIs, HTTPS, microservices, and message queues, Ability to design high-availability, scalable, high-performance systems, Very good knowledge of relational databases and SQL, Knowledge of distributed systems and data processing, Hands-on experience with Kubernetes and cloud platforms (GCP preferred), Familiarity with CI/CD pipelines, Experience working in Agile methodologies, Fluent Polish and English, Residence in Poland 📃 Skills: Java, Spring, REST, HTTPS, Microservices, MQ, SQL, Kubernetes, GCP, CI/CD, Agile, DistributedSystems, DataProcessing 🏢 Description: We are looking for an experienced Senior Java Developer to join a team responsible for building and developing modern backend systems in a distributed environment. The projects involve high-performance and scalable solutions used in the financial sector, with a focus on processing large volumes of data and microservices architecture. Your tasks Designing and developing backend systems based on Java Creating and evolving a microservices architecture Building and maintaining REST APIs and system integrations Designing solutions that meet high availability and performance requirements Working with systems that process large volumes of data Collaborating with the team using Agile methodologies Participating in architecture design and technical decision-making Implementing and optimizing CI/CD processes and ensuring system security Requirements Minimum 10 years in software development Very good knowledge of Java (backend) and Spring Strong understanding of REST APIs, HTTPS, microservices, and message queues (MQ) Ability to design high-availability, scalable, and high-performance systems Very good knowledge of relational databases (SQL) Familiarity with CI/CD pipelines and Agile ways of working Knowledge of distributed systems and data processing Hands-on work with Kubernetes and cloud platforms (GCP preferred) Fluent Polish and English required Residing in Poland required Nice-to-have requirements Knowledge of Go, Rust, or similar system-level languages Experience with NoSQL and analytical databases, e.g., ClickHouse Frontend development experience Familiarity with the banking sector (trade lifecycle, FX, post-trade processing) Banking experience / FX experience (forex) Working from the office in Krakow 6 times per month What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Senior Backend Developer role focused on building and maintaining internal banking architecture tooling using Java and Node.js in a hybrid Krakow-based environment. The position involves developing backend services, APIs, web UI components, and AI-agent orchestration solutions to support enterprise-scale digital transformation. Candidates should have strong software engineering experience, database expertise, and knowledge of modern integration and automation practices. 🗂️ Requirements: 5+ years of software engineering experience, Strong expertise in Node.js, Strong expertise in Java, Experience with relational databases, Proficiency in PostgreSQL, Experience with JavaScript/TypeScript frameworks, Knowledge of agentic application engineering, Experience with MCP integration patterns, API design experience, Experience with tool/function calling, Production engineering mindset, Solution design skills, Fluent English, Legal right to work in the European Union 📃 Skills: Java, Node.js, PostgreSQL, JavaScript, TypeScript, MCP, API, SQL, AI, DevOps 🏢 Description: Empower innovative architecture tools — shape the future of banking technology! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Backend Developer – Java and Node.js Platforms , you will be working for our client, a leading international bank. You’ll contribute to designing, building, and maintaining cutting-edge internal tooling that supports the bank’s Future State Architecture across CTO Platforms. Your work will enable seamless integration of data, workflows, and autonomous AI agents, helping redefine technology governance at scale and driving digital transformation. Your main responsibilities: Design, develop, and maintain reliable internal tooling supporting Future State Architecture (FSA) with a focus on security, resilience, and usability. Build backend services and APIs using Node.js and/or Java, integrating with PostgreSQL and other enterprise data sources. Develop web UI components utilizing modern JavaScript/TypeScript frameworks to deliver intuitive user workflows. Apply agentic engineering practices to orchestrate autonomous AI agents for building, testing, and deploying software. Implement secure, efficient integration patterns (e.g., MCP, API design, tool/function calling) across the architecture ecosystem. Collaborate with architects, platform engineers, and stakeholders to translate architectural needs into effective technical solutions. Ensure solutions adhere to client's engineering standards, including testing, performance, security, and operational readiness. Support continuous improvement initiatives through automation, code reviews, and operational support for live systems. You're ideal for this role if you have: At least 5 years of experience in software engineering, with strong expertise in Node.js and/or Java . Proficiency with relational databases , particularly PostgreSQL (data modeling, query optimization). Web UI development experience with modern JavaScript/TypeScript frameworks . Knowledge of agentic application engineering , including orchestration of autonomous AI agents. Experience with integration patterns such as MCP , API design , and tool/function calling . A production engineering mindset, emphasizing security, resilience, performance, and observability . Solution design skills for internal platforms and tooling. Excellent English communication skills and proven experience in stakeholder collaboration within a global environment. It is a strong plus if you have: Certifications or experience in automation, DevOps, or related fields. Additional familiarity with cloud services or enterprise architecture frameworks. Language Required for the role: Fluent English (spoken and written). Eligibility to work in: 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 Java Developer role focused on designing, building, and operating highly scalable fintech backend systems supporting high-volume payment, trading, and settlement platforms. The position involves developing production-grade Java/Spring Boot microservices, scalable APIs, and distributed systems in cloud environments. The engineer owns features end-to-end, ensuring reliability, fault tolerance, and performance in high-traffic financial systems. 🗂️ Requirements: 5–15 years backend development experience, Strong Java experience in production, Hands-on Spring Boot experience, Experience in fintech, banking, payments, or trading systems, Experience building scalable backend services and APIs, Strong SQL knowledge, Experience with NoSQL databases, Knowledge of microservices architecture, Understanding of distributed systems, Experience with asynchronous processing, Experience across full SDLC, Cloud experience with AWS or Azure, Experience debugging distributed systems, English communication skills 📃 Skills: Java, Spring, SpringBoot, SQL, PostgreSQL, MySQL, MongoDB, NoSQL, Microservices, DistributedSystems, AWS, Azure, REST, APIs, SDLC, AsynchronousProcessing 🏢 Description: We are looking for a Senior Java Developer to join our team in Poland and contribute to the development of highly scalable fintech systems supporting trillions of dollars in transactions annually . In this role, you will work closely with the US-based product and engineering teams , helping to design, build, and operate backend services for programmable payment, trading, and settlement platforms. You will report directly to the Software Manager in Poland. A key requirement is excellent English communication skills and strong soft skills — we are looking for someone eloquent, outgoing, friendly, and confident in collaboration . Requirements 5 -15 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production systems. Previous exposure to banking, payments, trading, or financial transaction systems. Proven experience building and maintaining backend services and APIs at scale. Solid understanding of SQL and NoSQL databases (e.g., PostgreSQL/MySQL, MongoDB). Knowledge of microservices architecture, distributed systems, and asynchronous processing. Experience across full SDLC: architecture, development, testing, deployment, and maintenance. Experience operating systems in cloud environments such as AWS or Azure . Excellent communication skills in English . Nice to Have Experience with Spring AI . Degree in Computer Science or equivalent practical experience. Personal Attributes Highly hands-on engineer who enjoys owning production-grade code. Comfortable working in a fast-paced, startup or high-growth environment. Strong analytical thinking, problem-solving ability, and attention to detail. Clear communicator, confident in collaborating with international teams. Friendly, proactive, and motivated to grow with the company and product. Design and develop backend architecture for fintech products and platforms. Build, maintain, and operate high-performance Java / Spring Boot microservices running in production environments. Develop scalable APIs and backend workflows with strong emphasis on data consistency, fault tolerance, and reliability. Own features end-to-end: from implementation through deployment and production support. Debug and resolve complex issues in distributed systems and high-volume production environments. Work closely with US-based teams to translate product requirements into robust backend solutions. Write clean, maintainable code and contribute to technical documentation, diagrams, and system workflows. Participate in code reviews and continuously improve backend quality and engineering standards.

🏢 Summary: Senior Java Backend Engineer role focused on building and enhancing low-latency FX trading systems for a top North American bank, fully remote from Poland. The position involves developing high-performance backend services for algorithmic order management and order routing in real-time, high-throughput environments. This is a long-term opportunity to work on actively developed, large-scale trading platforms in close collaboration with traders and international teams. 🗂️ Requirements: Current professional Java programming experience, Strong understanding of algorithms, complexity and multi-threading, Deep knowledge of Java language and standard libraries, Strong knowledge of data structures and Java Collections Framework, Experience building backend services for front-office trading systems, Understanding of front-office workflows and electronic trading platforms, Experience with algorithmic order management or order routing systems, Expertise in multi-threading, event-driven systems and performance tuning, Knowledge of low-latency trading systems (microsecond level), English proficiency, Residence and legal right to work in Poland, Ability to overlap 6 hours with US Eastern Time 📃 Skills: Java, Algorithms, Multithreading, DataStructures, Collections, Concurrency, LowLatency, OrderRouting, OrderManagement, ElectronicTrading, EventDriven, PerformanceTuning, FX, Backend 🏢 Description: Join the Fixed Income Trading Systems Team at a top N. American Bank This isn’t just another dev role. It’s your chance to engineer the core of global trading. We’re talking ultra-low-latency architectures, real-time market data, and automation at scale — all in an environment where milliseconds matter and billions move. You’ll work on greenfield and semi-greenfield projects, building FX (forex) trading workflows. If you thrive on complexity, love solving performance challenges under pressure, and want to collaborate directly with traders and product teams at the sharp edge of financial technology — this is your arena. The Role at a Glance Senior Java Backend Engineer Building a FX trading systems, including high-performance backend services for algorithmic order management and order routing. 270zł - 300zł / hr B2B net + VAT Fully remote for a top N. American bank (for residents of Poland only) This role requires experience building trading systems, specifically with order routing or algorithmic order management. If you enjoy working on low-latency, high-throughput trading systems, join us and build the next generation of high-performance capital markets solutions. Why Join Us? Work on a large-scale, low-latency trading system . No Legacy: Join an actively developed system — the engineers who built it originally are still on the team. Collaborate with a world-class team of developers across North America and Europe. Enjoy the stability of a long-term, fully remote role that only a bank can offer. A successful candidate will be a very strong programmer with current Java development experience. They must also be curious, open-minded, and desire to learn new things. English proficiency is a must. This role is for developers who excel at programming core Java from the ground up, not just integrating frameworks or APIs. If you’re fascinated by understanding systems ‘under the hood,’ this role is for you. Successful candidates enjoy geeking out about data structures and debugging application performance issues. This is a fully remote backend Java development role for a developer in Poland . You will be working through a Polish company that will provide the support and administrative assistance to make you successful in the role. We are looking for people to join the team long-term. Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland, are welcome. What we offer Work that matters in the financial domain: You’ll be building high performance trading system at an established financial institution. Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment. Direct collaboration : You will work directly with the client team in North America and in Poland. 1st-tier work : This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team. Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term. Flexibility & remote work: Fully remote position based in Poland with increasing schedule flexibility post-onboarding. Competitive Compensation: Top pay and ample time-off options. Responsibilities Design and implement robust software solutions for FX trading systems using core Java. Build high-performance backend services that algorithmically manage and route orders. Create thorough test cases to ensure software stability and reliability. Collaborate with operations teams regarding building new features and improving existing functionality. Requirements Must have Current Java programming experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries. Good knowledge of the data structures: familiarity with the Java collections framework, depth of understanding of the commonly used data structures, intuition on what to use when. Proven experience building backend services for front-office trading systems. Deep understanding of front-office workflows and electronic trading platforms (any asset class). Built or contributed to the algorithmic order management systems or order routing systems (any asset class). Expertise in multi-threading, event-driven systems, and performance tuning. Ability to break down complex workflows into maintainable, high-quality solutions. Strong communication skills and comfort working in high-stakes, trader-facing environments. Knowledge that is required for building low-latency (measured in microseconds) trading systems. Ability to align your work with a 6 hour overlap with US Eastern business hours. Nice to have Experience with trading protocols or FX trading systems. Exposure to time-series databases and market data integration. Familiarity with algorithmic workflows and pricing engines. A computer science degree from a top Polish school. The recruitment process Submit your CV. Answer a few written questions and a short programming exercise, which you can do at your own pace. Participate in an online three-stage interview process: Technical screen interview Three technical interviews with future team members Discuss your experience and skills. Solve verbal algorithm problems (focus on clarity and understanding). Tackle live coding challenges (no trick questions). Successful candidates will need to pass a standard background check.

🏢 Summary: Senior Java Backend Developer role focused on developing and maintaining a large-scale, high-transaction enterprise platform for global financial institutions, supporting fraud detection, AML processes and real-time transaction analysis. The position involves backend feature delivery, performance optimization, system upgrades and working with distributed, data-intensive systems. It offers impact on globally used financial systems in a complex, production-grade environment. 🗂️ Requirements: Minimum 7–8 years of commercial experience in building and maintaining production systems, Strong experience with Java in backend development, Hands-on experience with Spring Boot, Experience with Kafka and event-driven or queue-based systems, Practical experience with Docker and Kubernetes, Experience working with Unix/Linux environments, Experience in high-transaction, distributed or large-scale data systems, English at C1 level 📃 Skills: Java, Spring, SpringBoot, Kafka, RabbitMQ, Docker, Kubernetes, Unix, Linux, GCP, Terraform, Angular, Elasticsearch, Spark, SQL, Grafana 🏢 Description: Nasz Klient to firma technologiczna tworząca zaawansowaną platformę dla sektora finansowego, wykorzystywaną przez ponad 130 instytucji na świecie do wykrywania fraudów, przeciwdziałania praniu pieniędzy oraz analizy transakcji w czasie rzeczywistym. Projekt koncentruje się na utrzymaniu i rozwoju dużej, złożonej platformy enterprise, składającej się z kilkudziesięciu aplikacji, obejmującej m.in . elementy AI (Artificial Intelligence) , scoringu klienta, wnioskowania oraz funkcjonalności używane w systemach bankowych. Szukamy doświadczonej osoby na stanowisko Senior Java Backend Developer , która dobrze odnajduje się w środowiskach wysoko transakcyjnych, potrafi diagnozować złożone problemy techniczne i chce mieć realny wpływ na rozwój systemów używanych globalnie. 📍 TRYB PRACY: Warszawa, hybrydowo, minimum 2 dni w tygodniu z biura, czasem 3 dni. 🧑‍💻 CZYM BĘDZIESZ SIĘ ZAJMOWAĆ? Rozwojem i utrzymaniem dużej, złożonej platformy enterprise wykorzystywanej przez globalne instytucje finansowe do analizy transakcji, wykrywania fraudów, scoringu klientów oraz obsługi procesów związanych z przeciwdziałaniem przestępczości finansowej. Projektowaniem i dostarczaniem funkcjonalności backendowych w środowisku wysoko transakcyjnym, gdzie liczy się niezawodność, wydajność, skalowalność oraz umiejętność pracy z dużymi wolumenami danych. Diagnozowaniem problemów wydajnościowych i infrastrukturalnych, analizą miejsc, w których system „utyka”, identyfikowaniem nadmiernego zużycia zasobów oraz proponowaniem praktycznych rozwiązań. Pracą przy instalacjach, upgrade’ach, skryptach migracyjnych oraz stopniowym przepisywaniu istniejących rozwiązań na nowsze technologie. Wspieraniem mniejszych decyzji projektowych i architektonicznych - nie jest to rola architektoniczna, ale doświadczenie w tym obszarze będzie dużym atutem. 🔍 CZEGO OD CIEBIE OCZEKUJEMY? Must have: Minimum 7–8 lat doświadczenia komercyjnego w tworzeniu i utrzymaniu systemów produkcyjnych, najlepiej w środowiskach wysoko transakcyjnych, rozproszonych lub przetwarzających duże wolumeny danych. Bardzo dobrej znajomości Java oraz doświadczenia z Spring Boot przy budowie backendowych usług produkcyjnych. Doświadczenia z systemami kolejkowymi i przetwarzaniem zdarzeń, szczególnie z Kafka oraz mile widzianą znajomością RabbitMQ . Praktycznej znajomości konteneryzacji i pracy ze środowiskami uruchomieniowymi opartymi o Docker oraz Kubernetes . Umiejętności pracy z systemami Unix/Linux z perspektywy użytkownika oraz swobodnego poruszania się po środowiskach serwerowych. Bardzo dobrej znajomości języka angielskiego na poziomie C1 – organizacja działa międzynarodowo, a codzienna komunikacja wymaga jasnego i praktycznego porozumiewania się. Nice to have: Doświadczenie z chmurą, szczególnie GCP (Google Cloud Platform) , lub innymi rozwiązaniami cloudowymi. Znajomość Terraform , Angular , Elasticsearch , Spark , SQL oraz narzędzi obserwowalności, takich jak Grafana . Doświadczenie w branży bankowej, fintech, forex, kurierskiej, logistycznej lub innej, w której występują systemy rozproszone, wysoka transakcyjność i potrzeba analizy problemów wydajnościowych. Background architektoniczny lub doświadczenie w podejmowaniu mniejszych decyzji projektowo-technicznych w zespole seniorskim. 🤝 DLACZEGO WARTO? Realny wpływ na rozwój platformy używanej przez globalne instytucje finansowe do wykrywania i zapobiegania przestępczości finansowej. Praca w doświadczonym, technicznym zespole, który stawia na ownership, dobrą komunikację i solidne decyzje inżynierskie. Możliwość pracy przy systemach o dużej skali, wysokiej transakcyjności i realnych wyzwaniach wydajnościowych. Kontakt z nowoczesnym stackiem technologicznym obejmującym Java , Spring Boot , Kafka , Docker , Kubernetes , rozwiązania cloudowe oraz narzędzia observability. Przejrzysty proces rekrutacyjny: 1-godzinna rozmowa techniczna online z developerem, a następnie spotkanie na miejscu poświęcone dopasowaniu do zespołu, rozmowie o doświadczeniu oraz otwartym tematom technicznym i architektonicznym. Dziękujemy za wszystkie zgłoszenia! Skontaktujemy się z wybranymi osobami. TQLO Sp. z o.o. – Agencja Zatrudnienia (nr KRAZ 33580)

🏢 Summary: Senior Java Developer role focused on building and maintaining backend components and integration services for a global trading platform, including financial data processing and repo trading solutions. The position involves working in an agile, DevOps-oriented environment with cross-regional teams and requires hybrid work from Kraków or Wrocław. 🗂️ Requirements: Hands-on experience with Java, Hands-on experience with C++, Proficiency in Unix/Linux environments, Scripting skills, Knowledge of source code control tools, Experience with build tools, Strong SQL skills, Database expertise, Experience with CI/CD practices, Experience integrating messaging systems, Experience with middleware solutions, Experience working in Agile methodologies 📃 Skills: Java, C++, Unix, Linux, SQL, CI/CD, DevOps, Git, Jenkins, Messaging, Middleware 🏢 Description: We are seeking a highly experienced Senior Java Developer with expertise in C++ to join our dynamic team. You will contribute to the development of backend components, integration solutions, and services powering a global trading platform. This role encompasses financial data processing, cash and collateral management, and repo trading activities, offering the chance to work on innovative projects in a fast-paced, agile environment. This role offers a hybrid model, with 3 days per week working from the client's office in Kraków or Wrocław, Poland. Responsibilities Design, develop, and maintain backend system components and services in adherence to coding standards Collaborate with cross-regional teams to support EMEA, AMER, and APAC operations Participate in requirements analysis, functional design, and release lifecycles Integrate APIs and financial data processing solutions seamlessly Ensure robust delivery and provide support for released components Drive innovation and share best practices in software engineering Contribute to enhancing DevOps and continuous integration/delivery frameworks Requirements Hands-on experience with Java and C++ Proficiency in Unix/Linux environments and scripting Knowledge of source code control and build tools Strong SQL skills and database expertise Familiarity with engineering and DevOps practices such as continuous integration and delivery Proven capability in integrating messaging and middleware solutions Solid background in agile methodologies Excellent communication and problem-solving abilities Nice to have Background in investment banking or financial services Familiarity with financial data processing and remediation Understanding of release management processes Knowledge of global trading regulations and standards 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.