Senior Java Developer | Trading Platform

🏢 Summary: Senior Java Software Engineer role focused on building and enhancing Front Office trading systems for Credit and IR derivatives in a hybrid Krakow-based environment. The position involves developing high-availability Java microservices, supporting real-time risk management, and improving DevOps and trading infrastructure. Candidates will collaborate with engineering and IT teams to deliver scalable trading technology solutions. 🗂️ Requirements: 7+ years of Java back-end development experience, Experience with RESTful APIs and microservices, Experience in high-availability service architecture, Strong SQL skills, Knowledge of PostgreSQL or Sybase, Hands-on experience with AI tooling and models, Experience delivering Java-based services or modules, Fluent English, Legal right to work in the European Union 📃 Skills: Java, REST, Microservices, SQL, PostgreSQL, Sybase, DevOps, CI/CD, Agile, AI 🏢 Description: Unleash innovation in trading technology — shape the future of Credit and IR derivatives! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Java Software Engineer , you will be working for our client, a global leader in foreign exchange markets. The Commodities IT team develops cutting-edge Front Office applications to support commodities trading, leveraging agile methodologies and advanced market technology. This senior role is part of the Credit VS – Qilin team, focusing on creating and enhancing trading systems for Credit and IR derivatives, enabling real-time risk management and operational excellence. Your main responsibilities: Build high-end solutions using market-leading technology stacks across trading workflows Act as Application Specialist for front-to-back systems related to Credit derivatives and IR derivatives trading Propose and implement sustainable tooling infrastructure, including DevOps, release management, resiliency, and monitoring Contribute to the evolution of existing tech stacks and improvement of processes Engage in design review forums, representing application architecture and innovations Collaborate with IT management and engineering teams to enable effective trading workflows and risk controls You're ideal for this role if you have: 7+ years of experience in Java back-end development, with expertise in RESTful APIs and microservices Proven experience in high-availability service architecture Strong skills in SQL and practical knowledge of databases like PostgreSQL or Sybase Hands-on experience with AI tooling and models in day-to-day tasks Experience leading the delivery of Java-based services or modules Excellent communication skills in English, including meetings and presentations Strong analytical thinking and problem-solving capabilities A fast learner with curiosity and a passion for new technologies Ability to perform calmly under pressure A team-oriented mindset It is a strong plus if you have: Production support experience Knowledge of Agile development, CI/CD processes Domain expertise in banking or financial markets Language Required for the role: Fluent English Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Java Backend Engineer role focused on building and enhancing Front Office trading and risk management systems for FX and Commodities markets. The position involves developing low-latency, high-availability backend services and real-time risk capabilities within a global trading environment. The offer includes hybrid work in Krakow and the opportunity to work on high-impact financial systems. 🗂️ Requirements: 5+ years of Java backend development experience in financial services, Proficiency in HTTPS, RESTful API, microservices, and MQ, Understanding of high-availability service architecture, Experience with SQL and PostgreSQL or Sybase, including performance tuning, Experience delivering or leading Java-based services or modules, Fluent English communication skills, Legal right to work in the European Union 📃 Skills: Java, HTTPS, REST, Microservices, MQ, SQL, PostgreSQL, Sybase, CI/CD, Agile 🏢 Description: Unleash innovation at the forefront of trading technology — shape the future of risk management! Krakow-based opportunity with hybrid work model. As a Senior Java Backend Engineer – Trading and Risk Management , you will be working for our client, a leading financial institution specializing in foreign exchange and commodities trading. You’ll contribute to developing high-impact Front Office applications that support and expand institutional trading operations across global markets. Join us to drive technological excellence and elevate trading solutions in a dynamic, fast-paced environment. Your main responsibilities: Develop and support front-to-back trading exchanges, client portals, and end-to-end trade lifecycles. Build high-end solutions using market-leading technologies across the trading stack. Deliver cross-product Front Office systems for trading and risk management in FX and Commodities. Maintain and enhance electronic trading applications optimized for low latency and high throughput. Enable real-time risk management capabilities for FX and Commodities trading workflows. You're ideal for this role if you have: 5+ years of experience in Java back-end development in financial services. Proficiency with HTTPS, RESTful API, micro-services, and MQ. Solid understanding of high-availability service architecture. Experience with SQL and at least one main-stream database (PostgreSQL or Sybase), including basic performance tuning. Proven ability to own or lead the delivery of Java-based services or modules. Excellent communication skills in English, capable of discussing complex ideas efficiently. Strong analytical and problem-solving skills. Passionate about technology, with a curiosity to stay updated and deepen expertise. Ability to perform under pressure with calmness in urgent situations. A collaborative team player mindset. It is a strong plus if you have: (optional) Experience in production support. Knowledge of agile development, CI/CD practices. Language Required for the role: Fluent in English, with excellent communication skills. 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 Engineer role focused on building and rewriting a low‑latency FX & Commodities Risk platform for a global investment bank. The position involves developing high‑performance, distributed backend systems supporting real‑time risk calculations across trading desks. This is a backend‑heavy role centered on multithreading, event streaming, and scalable data processing in a financial environment. 🗂️ Requirements: Financial services experience (FX Risk or trading systems), Strong Core Java expertise, Experience with Spring or Spring Boot, Knowledge of multithreading and concurrency, Experience building low-latency systems, Experience with distributed systems, Hands-on experience with Kafka or similar messaging systems, Experience with Hazelcast or distributed caching solutions, Experience with modern data stores (e.g., ClickHouse), Ability to work with complex legacy systems, Backend development experience in high-performance environments 📃 Skills: Java, CoreJava, Spring, SpringBoot, Kafka, Hazelcast, ClickHouse, Multithreading, Concurrency, LowLatency, DistributedSystems, JVM, WPF, C#, Haskell 🏢 Description: ** CANDIDATES MUST HAVE FINANCIAL EXPERIENCE ** Java Engineer – FX & Commodities Risk Platform Global Investment Bank | Low‑Latency Systems | B2B | Remote | Rate: 2100PLN + | Must have Financial Experience A global investment bank is expanding its FX & Commodities Risk engineering team and is hiring a Senior Java Engineer in Poland to help build a next‑generation risk platform used by trading desks in London, Singapore, and New York. This is a rare opportunity to work on a brand‑new system rewrite while learning from a complex, high‑performance legacy platform that has powered global trading for years. What We’re Looking For Strong experience with Core Java and Spring Solid understanding of multithreading, concurrency, and low‑latency systems Experience with Kafka, Hazelcast, or similar distributed technologies Familiarity with modern data stores (ClickHouse is a plus) Ability to learn from and navigate complex legacy systems Proactive mindset — someone who can drive development forward Strong communication and collaboration skills FX Risk or broader trading‑systems experience is a strong plus About the Platform The FX & Commodities Risk Platform provides real‑time risk calculations and reporting across multiple asset classes. The current system includes: Frontend: WPF (C#) Backend: Java (Core Java, Spring) Quant Library: In‑house, with Haskell used for interaction A full rewrite is underway, moving the platform to a modern, scalable architecture. What You’ll Work On You’ll play a key role in building the new platform, which is moving towards: Spring Boot Kafka for event streaming Hazelcast for distributed caching and computing ClickHouse for high‑performance data storage and reporting Key Engineering Focus Areas High‑performance multithreading & concurrency Low‑latency backend development Distributed systems using Kafka and Hazelcast Data‑intensive workloads using ClickHouse Interacting with the quant library (light Haskell exposure) Learning from the legacy system’s memory‑optimised design (critical for JVM stability) This is a backend‑heavy role with deep engineering challenges.

🏢 Summary: Opportunity for an experienced Java Developer to build and optimize high-performance financial systems, including trading platforms, risk management tools, and real-time market data solutions. The role focuses on developing scalable, mission-critical applications using modern Java and enterprise technologies. You will contribute to robust, low-latency systems in a fast-paced capital markets environment. 🗂️ Requirements: 5+ years of Java development experience (Java 8+), Strong experience with Spring Framework, Experience with relational and NoSQL databases (Oracle, PostgreSQL, MongoDB), SQL optimisation and database performance tuning skills, Experience with Maven or Gradle, Proficiency with Git, Experience designing and implementing RESTful APIs, Experience with messaging systems (JMS, RabbitMQ, Kafka) 📃 Skills: Java, Spring, Oracle, PostgreSQL, MongoDB, SQL, Maven, Gradle, Git, REST, JMS, RabbitMQ, Kafka 🏢 Description: About the Role We're seeking an experienced Java Developer to contribute to innovative financial technology solutions that drive the global capital markets. You'll be part of a collaborative team developing mission-critical systems including high-performance trading platforms, sophisticated risk management tools, regulatory compliance frameworks, and real-time market data processing engines trusted by top-tier financial institutions worldwide. What You'll Do Design and develop robust, scalable financial applications using modern Java technologies Build and optimise high-throughput trading systems and market data processing solutions Collaborate with cross-functional teams to deliver risk management and compliance platforms Implement RESTful services and integrate messaging systems for real-time data flow Optimise database performance and ensure system reliability in fast-paced trading environments Required Qualifications 5+ years of hands-on Java development experience with modern versions (Java 8 and above) Strong expertise in Spring Framework and enterprise application development Proven experience with relational and NoSQL databases including Oracle, PostgreSQL, and MongoDB Demonstrated skills in SQL optimisation and database performance tuning Proficiency with build automation tools ( Maven, Gradle ) Experience with Git version control and collaborative development workflows Solid understanding of RESTful API design and implementation Knowledge of enterprise messaging systems ( JMS, RabbitMQ, Kafka ) Be happy to work in a hybrid model - 3 days per week in the office in Central Krakow

🏢 Summary: Senior Java Back-End Developer role focused on building and maintaining a high-availability FX Calculations platform for post-trading risk and PnL processing. The position involves end-to-end development of robust, regulatory-compliant systems supporting traders’ daily activities within a hybrid work model. You will design, optimize, and support scalable Java-based services in a global financial environment. 🗂️ Requirements: 5+ years of Java back-end development experience, Strong knowledge of HTTPS, RESTful APIs, microservices, and MQ, Experience with high-availability service architecture, Hands-on experience with SQL and PostgreSQL, Experience delivering Java-based services/modules, Fluent spoken and written English, Legal right to work in the European Union 📃 Skills: Java, HTTPS, REST, Microservices, MQ, SQL, PostgreSQL, GCP, NoSQL 🏢 Description: Unleash Innovation in Global Finance — Drive Cutting-Edge Post-Trading Risk Solutions Krakow-based opportunity with hybrid work model (up to 3 days remote/week) As a Senior Java Back-End Developer , you will be working for our client, a leader in the financial services industry, focusing on the development of a critical FX Calculations platform. This role involves building and maintaining high-availability systems that support traders' daily activities and ensure regulatory compliance — empowering the future of digital finance and risk management. Your main responsibilities: Develop, improve, and maintain the bank’s proprietary solution for post-trading risk and PnL calculations, ensuring system robustness and accuracy. Collaborate with cross-functional teams to perform end-to-end project delivery, including requirement analysis, coding, testing, and deployment. Design detailed technical specifications covering data models, interfaces, and performance tuning. Provide production support, incident management, and system ownership, including troubleshooting and performance enhancements. Participate in code reviews, solution design discussions, and team activities to promote continuous improvement and best practices. Support and contribute to problem-solving, performance tuning, and proof-of-concept initiatives. You're ideal for this role if you have: Over 5 years of experience in Java back-end development, with a solid understanding of HTTPS, RESTful APIs, microservices, and message queues (MQ). Strong knowledge of high-availability service architecture and reliable system design. Hands-on experience with SQL, particularly PostgreSQL, including database performance optimization. Proven track record of delivering Java-based services/modules and owning or leading technical projects. Excellent communication skills in English, with the ability to facilitate discussions and presentations, and proficiency in Mandarin is a plus. Analytical mindset, problem-solving skills, and passion for technology innovation. Ability to perform under pressure and work effectively as a team player. It is a strong plus if you have: Experience in high-volume data processing and compute. Knowledge of no-SQL databases or columnar storage solutions. Experience building services on cloud platforms, especially GCP. Front-end development skills or experience. Background in production support and agile development environments. Domain expertise in banking, trade lifecycle, and post-trade processing for FX or financial investment products. Language Required for the role: Fluent spoken and written English Eligibility to work on this 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: Hybrid Krakow-based Senior Java Back-End Developer role focused on building and enhancing a critical FX post-trading risk and PnL calculation platform within the financial sector. The position involves developing high-availability, Java-based microservices, ensuring system robustness, regulatory compliance, and production stability. The role covers full lifecycle delivery, performance optimization, and technical ownership of back-end services. 🗂️ Requirements: 5+ years of Java back-end development experience, Strong knowledge of HTTPS, Strong knowledge of RESTful APIs, Experience with microservices architecture, Experience with message queues (MQ), Knowledge of high-availability service architecture, Experience with SQL, Hands-on experience with PostgreSQL, Experience in database performance optimization, Proven experience delivering Java-based services or modules, Fluent spoken and written English, Legal right to work in the European Union 📃 Skills: Java, HTTPS, REST, Microservices, MQ, SQL, PostgreSQL, GCP, NoSQL 🏢 Description: Unleash Innovation in Global Finance — Drive Cutting-Edge Post-Trading Risk Solutions Krakow-based opportunity with hybrid work model (up to 3 days remote/week) As a Senior Java Back-End Developer , you will be working for our client, a leader in the financial services industry, focusing on the development of a critical FX Calculations platform. This role involves building and maintaining high-availability systems that support traders' daily activities and ensure regulatory compliance — empowering the future of digital finance and risk management. Your main responsibilities: Develop, improve, and maintain the bank’s proprietary solution for post-trading risk and PnL calculations, ensuring system robustness and accuracy. Collaborate with cross-functional teams to perform end-to-end project delivery, including requirement analysis, coding, testing, and deployment. Design detailed technical specifications covering data models, interfaces, and performance tuning. Provide production support, incident management, and system ownership, including troubleshooting and performance enhancements. Participate in code reviews, solution design discussions, and team activities to promote continuous improvement and best practices. Support and contribute to problem-solving, performance tuning, and proof-of-concept initiatives. You're ideal for this role if you have: Over 5 years of experience in Java back-end development, with a solid understanding of HTTPS, RESTful APIs, microservices, and message queues (MQ). Strong knowledge of high-availability service architecture and reliable system design. Hands-on experience with SQL, particularly PostgreSQL, including database performance optimization. Proven track record of delivering Java-based services/modules and owning or leading technical projects. Excellent communication skills in English, with the ability to facilitate discussions and presentations, and proficiency in Mandarin is a plus. Analytical mindset, problem-solving skills, and passion for technology innovation. Ability to perform under pressure and work effectively as a team player. It is a strong plus if you have: Experience in high-volume data processing and compute. Knowledge of no-SQL databases or columnar storage solutions. Experience building services on cloud platforms, especially GCP. Front-end development skills or experience. Background in production support and agile development environments. Domain expertise in banking, trade lifecycle, and post-trade processing for FX or financial investment products. Language Required for the role: Fluent spoken and written English Eligibility to work on this 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 Back-End Developer role focused on building and maintaining a high-availability FX post-trading risk and PnL calculation platform. The position involves designing, developing, and supporting robust, scalable back-end services that ensure regulatory compliance and operational reliability. The role includes end-to-end delivery, performance optimization, and production support in a financial environment. 🗂️ Requirements: 5+ years of Java back-end development experience, Strong knowledge of HTTPS and RESTful APIs, Experience with microservices architecture, Experience with message queues (MQ), Knowledge of high-availability and reliable system design, Hands-on experience with SQL and PostgreSQL, Experience delivering and owning Java-based services or modules, Fluent spoken and written English, Legal right to work in the European Union 📃 Skills: Java, HTTPS, REST, Microservices, MQ, SQL, PostgreSQL, GCP, NoSQL, Cloud 🏢 Description: Unleash Innovation in Global Finance — Drive Cutting-Edge Post-Trading Risk Solutions Krakow-based opportunity with hybrid work model (up to 3 days remote/week) As a Senior Java Back-End Developer , you will be working for our client, a leader in the financial services industry, focusing on the development of a critical FX Calculations platform. This role involves building and maintaining high-availability systems that support traders' daily activities and ensure regulatory compliance — empowering the future of digital finance and risk management. Your main responsibilities: Develop, improve, and maintain the bank’s proprietary solution for post-trading risk and PnL calculations, ensuring system robustness and accuracy. Collaborate with cross-functional teams to perform end-to-end project delivery, including requirement analysis, coding, testing, and deployment. Design detailed technical specifications covering data models, interfaces, and performance tuning. Provide production support, incident management, and system ownership, including troubleshooting and performance enhancements. Participate in code reviews, solution design discussions, and team activities to promote continuous improvement and best practices. Support and contribute to problem-solving, performance tuning, and proof-of-concept initiatives. You're ideal for this role if you have: Over 5 years of experience in Java back-end development, with a solid understanding of HTTPS, RESTful APIs, microservices, and message queues (MQ). Strong knowledge of high-availability service architecture and reliable system design. Hands-on experience with SQL, particularly PostgreSQL, including database performance optimization. Proven track record of delivering Java-based services/modules and owning or leading technical projects. Excellent communication skills in English, with the ability to facilitate discussions and presentations, and proficiency in Mandarin is a plus. Analytical mindset, problem-solving skills, and passion for technology innovation. Ability to perform under pressure and work effectively as a team player. It is a strong plus if you have: Experience in high-volume data processing and compute. Knowledge of no-SQL databases or columnar storage solutions. Experience building services on cloud platforms, especially GCP. Front-end development skills or experience. Background in production support and agile development environments. Domain expertise in banking, trade lifecycle, and post-trade processing for FX or financial investment products. Language Required for the role: Fluent spoken and written English Eligibility to work on this 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: Java Developer role focused on building and optimizing scalable, high-performance applications for Fixed Income Rates and Credit trading desks within a global markets technology team. The position involves Java development, low-latency and multi-threaded programming, cross-functional collaboration, and production support in an international environment with hybrid work from Krakow. 🗂️ Requirements: 3+ years of professional Java development experience, Experience with low-latency programming, Experience with multi-threaded programming, Strong problem-solving and analytical skills, Ability to translate business requirements into technical specifications, Strong communication skills, English level B2 or higher, Availability to work from Krakow office 3 days per week 📃 Skills: Java, Kafka, AVRO, Azure, AWS, GCP, Bloomberg, Tradeweb 🏢 Description: We are hiring a Java Developer to deliver high-performance applications for Fixed Income Rates and Credit trading desks in a global markets tech team. You will build scalable Java services, improve existing components, and collaborate across 8 cities in 6 countries. Please note that working from the office in Krakow 3 days per week is required. Responsibilities Design and develop scalable Java applications that solve complex business challenges Improve and refactor existing components to increase performance and maintainability Lead UAT activities and deliver demos for key stakeholders Translate business requirements into clear technical specifications Collaborate with global IT teams to ensure smooth integration Support production releases and provide ongoing maintenance Deliver modern solutions while preserving functionality across a sophisticated, multi-faceted platform Requirements Hands-on experience with Java development, including 3+ years of professional work Practical familiarity with low-latency techniques and multi-threaded programming approaches Excellent problem-solving and analytical abilities Strong communication skills, able to explain complex technical topics to non-technical stakeholders Demonstrated eagerness to learn and adapt to new technologies and market changes English proficiency at B2 (Upper-Intermediate) level or higher Nice to have Knowledge of financial markets, especially Rates and Credit bonds/derivatives, and trading platforms such as Bloomberg and Tradeweb Experience with messaging systems like Kafka and data serialization formats such as AVRO Understanding of cloud platforms including Azure, AWS, or GCP EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Opportunity for a Senior or Mid Java Developer to join a long-term transformation programme modernising a global Collateral & Margining platform within an investment banking environment. The role focuses on building and supporting microservices-based solutions using modern Java and cloud-native technologies in an Agile/DevOps setup. You will contribute across the full SDLC, from design and development to production support, on a mission-critical system used globally. 🗂️ Requirements: Strong experience with Java 17/21, Experience with Spring Boot and microservices architecture, Knowledge of PostgreSQL, Experience with DevSecOps pipelines, Experience working in Agile and/or DevOps environments, Strong TDD practice using JUnit and Cucumber, Experience delivering complex systems to production, Ability to design scalable technical solutions from functional requirements 📃 Skills: Java, Spring, SpringBoot, SpringCloud, PostgreSQL, Microservices, REST, MQ, Solace, Ansible, Angular, TypeScript, HTML5, JUnit, Cucumber, Redis, Hazelcast, Coherence, GCP, AWS, GitHubCopilot 🏢 Description: Senior Java Developer – Global Investment Banking Platform (Kraków) B2B | Hybrid – 6 days per month in the office | 1300-1500 PLN | 1500 – 1800 PLN A global investment bank is expanding its engineering hub in Kraków and is looking for an experienced Senior and Mid Level Java Developers to join a long‑term programme modernising a business‑critical Collateral & Margining platform used across global markets. This is a chance to join a mature engineering organisation driving a multi‑year transformation from monolithic systems to a modern, microservices‑based architecture. You’ll work on high‑impact technology used by thousands of institutional clients worldwide, while contributing to a brand‑new platform built with the latest open‑source tooling. About the Team & Platform The Collateral technology group delivers end‑to‑end solutions for a cross‑asset trading and risk environment. The team is currently: Supporting a large‑scale, business‑critical monolithic platform Building a new microservices‑based collateral platform using modern engineering practices Accelerating adoption of Agile, DevOps, AI‑assisted development, CI/CD, and cloud-native tooling Tech stack includes:Java 17/21, Spring Boot 3.5, Spring 6, Spring Cloud, Angular 17, REST APIs, Message Queues, Ansible, and modern open‑source infrastructure. Role Overview As a Java Developer, you will: Design, build, and maintain high‑quality Java microservices Contribute across the full SDLC, from design to production support Apply Agile and DevOps principles to improve delivery velocity Use TDD (JUnit), integration tests, regression tests, and Cucumber for E2E scenarios Collaborate closely with QA, product, and architecture teams Mentor junior engineers and support knowledge‑sharing across the team Support production systems: incident resolution, monitoring, and problem management Build automation and tooling to improve operational efficiency Essential Experience Strong experience with Java 17/21, Spring Boot, and microservices Knowledge of PostgreSQL and DevSecOps pipelines Experience working in Agile and/or DevOps environments Strong communication skills and ability to collaborate across global teams Proven experience delivering complex systems from concept to production Ability to translate functional requirements into scalable technical solutions Strong TDD discipline (JUnit, integration tests, Cucumber) Desirable Skills Experience with AI‑assisted development tools (e.g., GitHub Copilot) Spring Cloud components (Hystrix, Eureka, Zuul, Sleuth, Feign, Ribbon) Distributed caching/in‑memory data stores (Redis, Hazelcast, Coherence) REST APIs and messaging (MQ, Solace) Automated deployment tools (Ansible) TypeScript, Angular, HTML5 Cloud exposure (GCP/AWS) Why Join? Work on a mission‑critical global banking platform Contribute to a major multi‑year transformation Join a stable, established engineering organisation with modern practices Influence architecture, tooling, and engineering standards Long‑term project with strong investment and roadmap clarity

🏢 Summary: Senior Java Developer role focused on building and enhancing high-performance applications for Fixed Income Rates and Credit trading desks, with a hybrid work model in Krakow. The position involves designing scalable Java solutions, optimizing low-latency systems, and collaborating with global teams to deliver and maintain complex trading platforms. The offer includes career development programs, certifications, and a comprehensive benefits package. 🗂️ Requirements: 5+ years of professional Java development experience, Experience with low-latency programming, Experience with multi-threaded programming, Strong problem-solving and analytical skills, Ability to communicate technical concepts to non-technical stakeholders, English proficiency at B2 level or higher, Availability to work from the Krakow office 3 days per week 📃 Skills: Java, Multithreading, Low-latency, Kafka, AVRO, Azure, AWS, GCP, Bloomberg, Tradeweb 🏢 Description: We are looking for an enthusiastic Senior Java Developer to build innovative applications for Fixed Income Rates and Credit trading desks. As a member of our global Fixed Income Rates and Credit markets technology team—a dynamic, driven group operating across 8 cities in 6 countries—you will provide high-performance solutions while preserving existing functionality. Please be aware that this role requires working from the Krakow office 3 days per week. Responsibilities Design and build scalable Java applications to address complex business challenges Enhance and refactor existing components to boost performance and maintainability Lead UAT and demonstration sessions with key stakeholders Convert business requirements into technical specifications Work alongside global IT teams to achieve seamless integration Assist with production rollouts and deliver ongoing maintenance Build cutting-edge solutions while sustaining a sophisticated, multi-faceted platform Requirements 5+ years of professional experience developing in Java Familiarity with low-latency and multi-threaded programming methods Outstanding problem-solving and analytical abilities Strong communication skills, capable of clarifying complex technical concepts for non-technical stakeholders Eagerness to learn and adjust to new technologies and market shifts English skills at B2 level or above Nice to have Comprehension of financial markets, especially Rates and Credit bonds/derivatives along with trading platforms (e.g., Bloomberg, Tradeweb) Experience with messaging systems such as Kafka and data serialization formats (e.g., AVRO) Understanding of cloud platforms (Azure, AWS or GCP) We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment 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) 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