Senior Java Developer

🏢 Summary: Senior/Expert IT Developer role focused on developing and modernising Java-based backend integration components for the IMSecurities Safekeeping and Corporate Actions platform. The position involves building microservices, supporting large-scale system migrations, troubleshooting production issues, and contributing to deployment and analysis activities in a Scrum environment. Hybrid B2B contract with 3 days per week onsite in Warsaw or Gdańsk. 🗂️ Requirements: 5+ years of Java backend development experience for Senior level, 10+ years of Java backend development experience for Expert level, Experience in large-scale enterprise environments, Proficiency in Spring Boot, Proficiency in Spring Integration, Experience with SQL and relational databases, Knowledge of Oracle databases, Experience with messaging and event-driven integration, Knowledge of REST services and microservices, Experience with integration patterns, Knowledge of Maven, Knowledge of Git, Experience with CI/CD pipelines, Experience with JUnit, Experience with Testcontainers, Ability to analyse requirements, system flows, data flows, logs, and production issues, Fluent English 📃 Skills: Java, Spring, SpringBoot, SpringIntegration, SQL, Oracle, IBMMQ, Kafka, REST, Microservices, Maven, Git, CI/CD, JUnit, Testcontainers, Scrum 🏢 Description: Work model: 3 days per week from office in Warsaw or Gdańsk Rate: 190 PLN/h net + VAT Employment type: B2B contract Overview The consultant will work as a Senior/Expert IT Developer in IMSecurities, developing and modernising backend integration components around the Safekeeping and Corporate Actions platform. The work includes designing, developing, testing, deploying and supporting Java-based microservices and integration components connecting IMSecurities with other systems. The application is undergoing intensive development due to a significant increase in scope and reach (migration of business flows & volumes over 2027-2029), which often requires rewriting and rearchitecting parts of the code base. The department is ramping up, particularly with developers, including this requisition. Main Responsibilities - Design, develop, test, deploy, and support Java-based microservices. - Modernise backend integration components around Safekeeping and Corporate Actions. - Conduct requirement analysis and prepare related documentation. - Work hands-on with development and step into analysis and deployment when needed. - Troubleshoot production issues and support deployment planning. - Participate in Scrum team activities and knowledge sharing protocols. - Contribute to the growth of employee developers through mentorship. Key Requirements - Strong Java backend development experience from large-scale enterprise environments (min. 5 years for Senior, 10 years for Expert). - Proficient in Spring Boot and Spring Integration. - Experience with SQL and relational databases, preferably Oracle. - Familiarity with messaging and event-driven integration, preferably IBM MQ and Kafka. - Expertise in REST services, microservices, and integration patterns. - Knowledge of Maven, Git, and CI/CD pipelines. - Automated testing experience with JUnit and Testcontainers. - Ability to analyse requirements, system and data flows, logs, and production issues. - Fluent in English. Nice to Have - Experience from banking or trading environments. - Cloud-ready application design. - Experience modernising integration custody, settlement, corporate actions, or another regulated domain. - Familiarity with containerisation and layers around vendor platforms. - Practical experience with test automation and AI-assisted development tools.

🏢 Summary: Senior Java Developer role focused on building and maintaining core banking systems using modern Java and event-driven microservices architecture. The position involves developing scalable services, evolving legacy systems, and contributing to a complex microservices ecosystem within a CI/CD environment. Remote work model with strong emphasis on high-quality, domain-driven design in the financial sector. 🗂️ Requirements: 7+ years of Java development experience, Experience in banking or financial services, Deep knowledge of Java 21/25, Strong knowledge of Spring Boot, Experience with MongoDB, Strong experience with Apache Kafka, Experience with event-driven architecture, Proficiency in REST APIs, Proficiency with Git, Proficiency with Maven, Experience with CI/CD tools, Experience with microservices architecture, Understanding of Domain-Driven Design (DDD), Ability to work with legacy systems, Communicative Polish, Legal right to work in the EU 📃 Skills: Java, Spring, SpringBoot, MongoDB, Kafka, REST, Git, Maven, Jenkins, OpenShift, JaCoCo, SonarQube, CQRS, DDD, Hexagonal, Microservices, CI/CD 🏢 Description: Empower scalable financial systems — drive innovation in banking technology! Warsaw-based opportunity with remote work model (up to 5 days remote per week). As a Senior Java Developer , you will be working for our client, a leader in the banking industry, dedicated to building and maintaining core domain systems that serve internal clients. Join us in creating robust, event-driven microservices that shape the future of banking infrastructure, fostering seamless digital experiences and technological excellence. Your main responsibilities: Develop and maintain core banking services using Java 21/25, Spring Boot 4.0, and MongoDB. Design and implement event-driven architectures utilizing Apache Kafka and Schema Registry. Collaborate on microservices ecosystem, ensuring high quality and scalability. Work with legacy code and contribute to system evolution within a complex environment. Ensure code quality through tools like JaCoCo and SonarQube, following best practices. Participate in CI/CD pipelines using OpenShift, Jenkins, and Maven. Apply Domain-Driven Design (DDD), CQRS, and Hexagonal architecture principles. Work independently within a mono-repo approach, managing multiple repositories and shared libraries. You're ideal for this role if you have: 7+ years of experience in Java development, ideally within banking or financial services. Deep knowledge of Java (21/25), Spring Boot, and MongoDB. Strong experience with Kafka and event-driven architecture. Proficiency with REST APIs, Git, Maven, and CI/CD tools. Ability to work with legacy systems and develop scalable solutions. Solid understanding of microservices architecture and domain modeling. It is a strong plus if you have: (optional) Certifications or experience in OpenShift, Jenkins, or related cloud technologies. Language Required for the role: Communicative Polish. 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 Java Developer role focused on developing and maintaining large-scale insurance systems and complex integrations in a long-term, stable project. The position involves designing integration architecture based on SOA and EDA, working with microservices, and influencing technical standards. Remote work with occasional onsite presence in Warsaw. 🗂️ Requirements: Minimum 5 years of Java development experience (8/11/17/21), At least 3 years of experience with Spring or Spring Boot, Experience designing and maintaining integrations using Oracle Service Bus (OSB), Knowledge of DDD, CQRS, Hexagonal Architecture, EDA, Experience with microservices and basic knowledge of Kubernetes, Knowledge of GIT, Experience with relational databases (Oracle or PostgreSQL), Experience writing automated tests (JUnit, Spock, Groovy, Testcontainers), Experience working in Agile (Scrum) environment 📃 Skills: Java, Spring, SpringBoot, OSB, DDD, CQRS, Hexagonal, EDA, Microservices, Kubernetes, Git, Oracle, PostgreSQL, JUnit, Spock, Groovy, Testcontainers, SOA 🏢 Description: Our Client is an international organization from the insurance sector , delivering large-scale and complex IT projects with high quality standards.The project focuses on the development and maintenance of key business and integration systems supporting insurance processes and inter-system communication. We are looking for an experienced Senior Java Developer who wants to work on a stable, long-term project and have a real impact on architecture and technical standards. 📍 WORK MODE: Remote – 1 day per month onsite in Warsaw 🧑‍💻 YOUR RESPONSIBILITIES Developing and maintaining software for insurance systems, with a strong focus on business needs, reliability, and code quality Designing and developing system integrations using Oracle Service Bus (OSB) Participating in the development of integration architecture and inter-system communication based on SOA and EDA (Event-Driven Architecture) Ensuring best software engineering practices: Clean Code, code reviews, automated testing Close collaboration with backend, frontend, integration, and architecture teams in an Agile (Scrum) environment Creating and maintaining technical and business documentation 🔍 WHAT WE EXPECT FROM YOU Must-have: Minimum 5 years of experience in Java development (8/11/17/21) At least 3 years of experience with Spring / Spring Boot Hands-on experience in designing and maintaining integrations using Oracle Service Bus (OSB) Knowledge of architectural concepts: DDD, CQRS, Hexagonal Architecture, EDA Experience with microservices and basic knowledge of Kubernetes (K8s) Knowledge of GIT and relational databases ( Oracle or PostgreSQL ) Experience in writing automated tests (JUnit, Spock, Groovy, Testcontainers) Teamwork skills and experience working in Agile (Scrum) Nice-to-have: Knowledge of messaging systems ( Kafka, RabbitMQ, ActiveMQ ) Experience with monitoring tools ( Dynatrace, Splunk ) Knowledge of NoSQL databases ( MongoDB, Infinispan ) Experience with Rancher Experience working with SOA architecture and ESB-class integration systems 🤝 WHY JOIN? Real influence on architecture and technical decisions Stable, long-term project in the insurance sector Mature work environment, clear processes, and a partner-based collaboration model Short and transparent recruitment process: 2 stages (technical interview + hiring manager) Thank you for all applications! We will contact selected candidates. TQLO Sp. z o.o. – Employment Agency, KRAZ No. 33580

🏢 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 Java Developer role in the banking industry focused on designing and modernising backend integration solutions for Safekeeping and Corporate Actions platforms. The position involves developing Java microservices, supporting production environments, and collaborating across Scrum teams in large-scale enterprise systems. The offer includes private medical care, sports card co-financing, and an employee referral program. 🗂️ Requirements: 5+ years of Java backend experience, Experience in large-scale enterprise environments, Spring Boot, Spring Integration, SQL, Relational databases, REST services, Microservices, Integration patterns, Maven, Git, CI/CD pipelines, JUnit, Testcontainers, Messaging systems, Event-driven integration, Ability to analyse requirements and production issues, Fluent English 📃 Skills: Java, Spring, SpringBoot, SpringIntegration, SQL, Oracle, IBMMQ, Kafka, REST, Microservices, Maven, Git, CI/CD, JUnit, Testcontainers, JIRA 🏢 Description: Senior Java Developer Industry: Banking Responsibilities: - Design backend integration solutions for Safekeeping and Corporate Actions platform - Develop Java-based microservices and integration components - Test, deploy and support backend services in production - Modernise and rearchitect existing codebase due to scope expansion - Analyse business and system flows and clarify requirements - Prepare and support test cases when needed - Document system dependencies and data flows - Support deployment planning and orchestration - Troubleshoot production issues and analyse logs and data flows - Participate in Scrum processes using JIRA - Contribute to knowledge sharing and development standards - Support growth and mentoring of other developers - Collaborate across development, analysis, QA and infrastructure teams Requirements: - Minimum 5 years of Java backend experience (Senior) or 10 years (Expert) - Strong experience in large-scale enterprise environments - Spring Boot and Spring Integration - SQL and relational databases (preferably Oracle) - Experience with messaging and event-driven integration (IBM MQ, Kafka preferred) - Experience with REST services, microservices and integration patterns - Maven, Git and CI/CD pipelines - Automated testing with JUnit and Testcontainers - Ability to analyse requirements, system flows, logs and production issues - Fluent English Nice to have: - Experience in banking or trading domain - Experience with cloud-ready application design - Experience in modernising integration in regulated domains (custody, settlement, corporate actions) - Experience with containerisation and integration with legacy systems or vendor platforms - Experience with test automation, static code analysis and AI-assisted development tools Offer: - Private medical care - Co-financing for the sports card - Constant support of dedicated consultant - Employee referral program

🏢 Summary: Senior Java Developer role focused on building and optimizing high-performance transactional and banking systems in a 100% remote environment. The position involves designing scalable backend solutions using modern Java and Spring technologies, integrating messaging systems, and ensuring system reliability through advanced monitoring and CI/CD practices. This opportunity targets experienced engineers ready to contribute to complex financial platforms in an agile setting. 🗂️ Requirements: Minimum 5 years of Java development experience, Strong experience with Java 21+, Strong experience with Spring Boot 3, Solid knowledge of PostgreSQL, Experience with CI/CD tools (GitLab, Jenkins), Experience with OpenShift deployments, Experience with RabbitMQ and Kafka, Experience with ELK stack and Dynatrace, Experience with JUnit 5, Mockito, RestAssured, Experience working in Agile (Scrum, Kanban), Good command of Polish, Communicative English proficiency, Legal right to work in the European Union 📃 Skills: Java, Spring, PostgreSQL, Redis, RabbitMQ, Kafka, ELK, Dynatrace, GitLab, Jenkins, OpenShift, JUnit, Mockito, RestAssured, SQL, R 🏢 Description: Unleash innovation in financial technology — shape the future of transactional systems with expertise and precision! 100% remote work. As a Senior Java Developer , you will be working for our client, a leading player in the financial services industry dedicated to delivering cutting-edge transactional and banking systems. You will contribute to the development of robust, scalable solutions that power high-stakes online financial operations, driving digital transformation and operational excellence. This role offers a unique chance to advance your career within an innovative environment that values technical mastery and strategic thinking. Your main responsibilities: Design, develop, and optimize complex backend systems using Java 21+ and Spring Boot 3, adhering to best practices and high-quality standards. Work with domain-driven design (DDD) to implement scalable and maintainable software solutions. Manage and optimize data solutions utilizing PostgreSQL, Redis, and integration tools like RabbitMQ and Kafka. Utilize tools such as ELK stack, Dynatrace, and CI/CD pipelines (GitLab, Jenkins, OpenShift) to ensure system performance and reliability. Conduct thorough testing and validation using JUnit 5, Mockito, and RestAssured to deliver resilient software releases. Collaborate with agile teams (Scrum, Kanban) for iterative development and continuous improvement. Contribute analytical insights and high-level problem-solving skills to support transaction systems in a fast-paced financial environment. You're ideal for this role if you have: At least 5 years of experience in Java development, with a strong background in Spring Boot 3 and Java 21+. Solid understanding of database technologies, particularly PostgreSQL. Practical experience with CI/CD tools such as GitLab, Jenkins, and deployment on OpenShift. Familiarity with message brokers like RabbitMQ and Kafka. Knowledge of monitoring and logging tools (ELK stack, Dynatrace). Experience with automated testing frameworks including JUnit 5, Mockito, and RestAssured. Strong analytical skills and experience working within agile methodologies (Scrum, Kanban). It is a strong plus if you have: Experience in the finance sector and knowledge of financial risk modeling. Certifications related to cloud, database management, or software development. Basic knowledge of R language and SQL testing. Language required for the role: Polish (good command), English (communicative proficiency). Eligibility to work in Europe: Only candidates with an existing legal right to work within the European Union will be considered for this role.

🏢 Summary: Senior Java Developer role focused on designing and delivering high-quality, scalable solutions for the securities industry within an international, agile environment. The position involves active participation in technical decision-making, cross-team collaboration, and maintaining robust enterprise-grade applications. Hybrid work model with up to four remote days per week. 🗂️ Requirements: Minimum 4 years of experience in Java development in enterprise environments, Strong knowledge of Java core technologies and frameworks, Experience working in cross-functional and international teams, Familiarity with Agile methodologies, Familiarity with DevOps practices, Fluent Polish and English, Legal right to work in the European Union 📃 Skills: Java, Agile, DevOps 🏢 Description: Unleash innovation in fintech — craft transformative solutions for the securities industry. Warszawa or Kraków-based opportunity with a hybrid work model (up to 4 remote days per week). As a Senior Java Developer working for our client, you will be a vital part of the TA IT team within the Securities Services cluster, focusing on delivering cutting-edge solutions for operational teams. You will be actively involved in technical discussions, decision-making processes, and collaborating with cross-location squads to ensure the robustness, quality, and sustainability of our applications. This role offers a unique chance to work in a dynamic, international environment, fostering growth and technical excellence. Your main responsibilities: Design, develop, and maintain high-quality Java applications aligned with business needs. Participate in technical discussions to drive innovative solutions and best practices. Collaborate with Business Analysts, Developers, and other stakeholders across locations to ensure project continuity. Contribute to code reviews, testing, and deploying scalable software as part of agile squads. Troubleshoot and resolve complex technical issues, providing quick and effective solutions. Document technical specifications and ensure adherence to compliance and security standards. Stay updated with the latest industry trends and incorporate new technologies into the development lifecycle. You're ideal for this role if you have: Minimum 4 years of experience in Java development within enterprise environments. Strong knowledge of Java core technologies and frameworks. Experience working with cross-functional and international teams. Excellent communication skills in Polish and English, with fluent command of both languages. Familiarity with Agile methodologies and DevOps practices. Ability to adapt quickly to changing project requirements and priorities. Strong problem-solving skills and attention to detail. It is a strong plus if you have: (optional) Experience working on financial or securities-related projects. Knowledge of additional programming languages or frameworks. Certifications related to Java development or agile methodologies. Language Required for the role: Polish: Fluent English: Fluent Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you At ITDS , you will work on innovative and impactful technology projects for international companies across multiple industries in Europe and beyond. We create an environment for ambitious, driven professionals who want to grow, deliver value, and build their careers in modern IT and digital transformation. Our offer includes: 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 Access to the Multisport program Access to learning platforms such as Pluralsight Flexible working hours and remote work options #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. # 8769

🏢 Summary: Senior Java Developer role focused on building and maintaining backend microservices in the Credit Data Sourcing domain within a banking environment. The position involves designing data flows, system integrations, and scalable business logic, as well as supporting production incidents. Work is performed in an Agile team with hybrid presence in Poland. 🗂️ Requirements: Strong experience with Java and backend development, Experience designing and maintaining microservices, Experience with data flows and data sourcing systems, Experience in integration-heavy environments, Ability to analyze end-to-end data flow across systems, Ability to assess impact on upstream and downstream systems, Experience working with distributed systems, Experience in incident analysis and troubleshooting, Understanding of financial or credit domain systems 📃 Skills: Java, Microservices, Dataflows, Integrations, Distributed, Banking, Credit, Agile, Scrum, Troubleshooting 🏢 Description: OFFER DETAILS: Industry: Banking Location: Warsaw / Gdańsk / Łódź Work model: Hybrid – 3 days per week in the office required Rate: up to 160 PLN/hour net + VAT Contract type: B2B Overview: The Senior Java Developer role focuses on the development and maintenance of backend services in the Credit Data Sourcing domain. This position requires strong involvement in data flows, integrations, and business logic, along with close collaboration with Business Analysts, Product Owners, and other stakeholders. The role also includes participating in production support and incident resolution. Main Responsibilities: Design, develop, and maintain Java-based microservices. Implement and optimize data flows and integrations between systems. Collaborate with analysts on user stories, acceptance criteria, and solution design. Translate business requirements into scalable technical solutions. Support incident analysis and troubleshooting including logs and root cause analysis. Contribute to refinement sessions and technical design discussions. Ensure high-quality code, testing, and performance. Key Requirements: Experience in data flows and data sourcing systems. Experience in integration-heavy environments. Ability to understand end-to-end data flow across systems. Ability to analyze impact of changes on upstream/downstream systems. Experience in the financial/credit domain is advantageous. Strong analytical and problem-solving skills. Good communication with both technical and business stakeholders. Ownership mindset and responsibility for delivery. Comfortable working in complex, distributed systems. Nice to Have: Experience with frontend frameworks like Angular or React. Experience in credit risk and banking systems. Experience with event-driven architectures. Performance tuning in data-heavy systems. Other Details: This position is based in Poland, specifically in Gdańsk, Warsaw, or Łódź. The role operates within an Agile/Scrum team environment, emphasizing close collaboration and regular alignment around releases. Ideal candidates will thrive in a dynamic, interdisciplinary setting.

🏢 Summary: Senior Java Developer role focused on designing, building, and operating scalable fintech backend systems using Java and Spring Boot in cloud environments. The position involves developing high-performance microservices and APIs for payment, trading, and settlement platforms, with end-to-end ownership from architecture to production support. The role requires close collaboration with international teams and ensuring reliability, consistency, and fault tolerance in distributed systems. 🗂️ Requirements: 3–5 years backend development experience, Strong experience with Java, Strong experience with Spring Boot, Experience building scalable backend services and APIs, Knowledge of SQL and NoSQL databases, Understanding of microservices architecture, Understanding of distributed systems, Experience with asynchronous processing, Experience across full SDLC, Experience with AWS or Azure, Professional English proficiency 📃 Skills: Java, SpringBoot, Microservices, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, REST, APIs, SDLC, DistributedSystems, AsynchronousProcessing 🏢 Description: Senior Java Developer (Java, Spring Boot, Microservices) Position Overview 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 . Responsibilities 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. Requirements 3–5 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production 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 . Previous exposure to banking, payments, trading, or financial transaction systems. 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.

🏢 Summary: Senior Java Developer role focused on designing, building, and operating scalable fintech backend systems handling high-volume transactions. The position involves developing Java/Spring Boot microservices, scalable APIs, and distributed architectures in cloud environments. You will collaborate with international teams to deliver reliable, production-grade financial platforms. 🗂️ Requirements: 3–5 years of backend development experience, Strong experience with Java and Spring Boot in production, Experience building scalable backend services and APIs, Strong knowledge of SQL and NoSQL databases, Understanding of microservices architecture and distributed systems, Experience with asynchronous processing, Experience across full SDLC, Experience with AWS or Azure cloud environments, Professional English communication skills 📃 Skills: Java, Spring, SpringBoot, Microservices, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, REST, APIs 🏢 Description: Senior Java Developer (Java, Spring Boot, Microservices) Position Overview 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 . Responsibilities 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. Requirements 3–5 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production 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 . Previous exposure to banking, payments, trading, or financial transaction systems. 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.