Java Developer

🏢 Summary: Senior Java Developer role focused on building and optimizing high-performance applications for Fixed Income Rates and Credit trading desks within a global financial technology team. The position involves developing scalable Java solutions, supporting production systems, and collaborating with international stakeholders and IT teams. Hybrid work from the Krakow office is required three days per week. 🗂️ Requirements: 3+ years of professional Java development experience, Knowledge of low-latency programming, Knowledge of multi-threaded programming, Strong problem-solving skills, Strong analytical skills, Ability to communicate technical concepts to non-technical stakeholders, Willingness to learn new technologies and adapt to market changes, English proficiency at B2 level or higher 📃 Skills: Java, Kafka, AVRO, Azure, AWS, GCP, Bloomberg, Tradeweb 🏢 Description: We are seeking a passionate Senior Java Developer to create innovative applications for Fixed Income Rates and Credit trading desks. You will deliver high-performance solutions while maintaining existing functionality as part of our global Fixed Income Rates and Credit markets technology team, a fast-paced, motivated group spread across 8 cities in 6 countries. Please note that working from the office in Krakow 3 days per week is required. Responsibilities - Architect and develop scalable Java applications for complex business challenges - Optimize and refactor existing components to improve performance and maintainability - Lead UAT and demonstration sessions with key stakeholders - Translation of business requirements into technical specifications - Collaboration with global IT teams to ensure seamless integration - Support production rollouts and provide ongoing maintenance - Development of cutting-edge solutions while maintaining a sophisticated, multi-faceted platform Requirements - 3+ years of professional Java development experience - Knowledge of low-latency and multi-threaded programming techniques - Excellent problem-solving and analytical skills - Strong communication skills, able to explain complex technical concepts to non-technical stakeholders - Willingness to learn and adapt to new technologies and market changes - English proficiency at B2 level or higher Nice to have - Understanding of financial markets, particularly Rates and Credit bonds/derivatives with trading platforms (e.g., Bloomberg, Tradeweb) - Familiarity with messaging systems like Kafka and data serialization formats (e.g., AVRO) - Knowledge of cloud platforms (Azure, AWS or GCP)

🏢 Summary: Lead Java Developer role focused on building and modernizing high-performance Java solutions for Fixed Income Rates and Credit trading platforms. The position involves developing scalable low-latency applications, supporting production systems, and collaborating with global IT and business stakeholders. Hybrid work from the Krakow office three days per week is required. 🗂️ 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 explain technical concepts to non-technical stakeholders, Ability to learn new technologies quickly, English proficiency at B2 level or higher 📃 Skills: Java, Kafka, AVRO, Azure, AWS, GCP, Bloomberg, Tradeweb 🏢 Description: We are building high-performance Java solutions for Fixed Income Rates and Credit trading desks within a global markets technology organization. As a Lead Java Developer, you will translate trading needs into scalable services, modernize existing components, and partner across regions to keep the platform reliable and fast. Please note that working from the office in Krakow 3 days per week is required. Responsibilities - Design and deliver scalable Java applications that address complex business challenges - Improve performance and maintainability by optimizing and refactoring existing components - Facilitate UAT and run demonstrations with key stakeholders - Convert business requirements into clear technical specifications - Coordinate with global IT teams to enable seamless integration - Support production releases and provide ongoing maintenance - Develop cutting-edge solutions while sustaining a sophisticated, multi-faceted platform Requirements - Proven track record with 5+ years of professional Java development experience - Hands-on experience with low-latency and multi-threaded programming techniques - Excellent problem-solving and analytical skills to tackle complex technical challenges - Strong communication skills, able to explain complex technical concepts to non-technical stakeholders - Willingness to learn quickly and adapt to new technologies and market changes - English proficiency at B2 (Upper-Intermediate) level or higher Nice to have - Understanding of financial markets, particularly Rates and Credit bonds/derivatives and trading platforms (e.g., Bloomberg, Tradeweb) - Familiarity with messaging systems like Kafka and data serialization formats (e.g., AVRO) - Knowledge of cloud platforms (Azure, AWS or GCP)

🏢 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

🏢 Summary: Senior Java Developer role focused on building and enhancing high-performance applications for Fixed Income Rates and Credit trading desks in a global technology team. The position involves designing scalable Java solutions, improving low-latency systems, collaborating with stakeholders and global IT teams, and supporting production rollouts. Hybrid work from the Krakow office is required 3 days per week. 🗂️ Requirements: 5+ years of professional Java development experience, Knowledge of low-latency programming, Knowledge of multi-threaded programming, Strong problem-solving skills, Strong analytical skills, Ability to communicate technical concepts to non-technical stakeholders, Ability to adapt to new technologies and market changes, English proficiency at B2 level or higher 📃 Skills: Java, 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)

🏢 Summary: Java Developer role focused on building and optimizing high-performance applications for Fixed Income Rates and Credit trading desks. The position involves developing scalable Java solutions, collaborating with global IT teams, and supporting trading platform integrations in a hybrid work environment. 🗂️ Requirements: 3+ years of professional Java development experience, Knowledge of low-latency programming, Knowledge of multi-threaded programming, Experience with asynchronous programming, Strong Java Core skills, Excellent problem-solving skills, Strong analytical skills, Strong communication skills, Ability to explain technical concepts to non-technical stakeholders, Willingness to learn new technologies, English proficiency at B2 level or higher 📃 Skills: Java, Multithreading, Asynchronous, Kafka, AVRO, Azure, AWS, GCP, Bloomberg, Tradeweb 🏢 Description: We are seeking a passionate Java Developer to create innovative applications for Fixed Income Rates and Credit trading desks. You'll deliver high-performance solutions while maintaining existing functionality and join the global Fixed Income Rates and Credit markets technology team. A 3-day-per-week presence in our office is required. Responsibilities - Architect and develop scalable Java applications for complex business challenges - Optimize and refactor existing components to improve performance and maintainability - Lead UAT and demonstration sessions with key stakeholders - Translate business requirements into technical specifications - Collaborate with global IT teams to ensure seamless integration - Support production rollouts and provide ongoing maintenance Requirements - 3+ years of professional Java development experience - Knowledge of low-latency and multi-threaded programming techniques - Skills in asynchronous programming, multithreading and Java Core - Excellent problem-solving and analytical skills - Strong communication skills, able to explain complex technical concepts to non-technical stakeholders - Willingness to learn and adapt to new technologies and market changes - English proficiency at B2 level or higher Nice to have - Understanding of financial markets, particularly Rates and Credit bonds/derivatives with trading platforms such as Bloomberg and Tradeweb - Familiarity with messaging systems like Apache Kafka and data serialization formats such as AVRO - Knowledge of cloud platforms such as Azure, AWS or GCP - Background in financial services, trade execution and trade lifecycle

🏢 Summary: Java Developer role focused on building and improving mission-critical financial systems using Java and the ION toolset in a fast-paced international environment. The position involves low-latency application development, stakeholder collaboration, production support, and integration with trading platforms and messaging systems. Hybrid work with 3 office days per week is expected. 🗂️ Requirements: 2+ years of software engineering experience, Professional Java development experience, Experience with low-latency programming, Experience with multi-threaded systems, Knowledge of object-oriented programming, Understanding of design patterns, Experience working in agile teams, Knowledge of Rates and Credit bonds and derivatives, Understanding of Bloomberg and TradeWeb platforms, Experience with Kafka, English proficiency at B2 level or higher 📃 Skills: Java, ION, Kafka, OOP, Agile, Bloomberg, TradeWeb, Python, Perl, PXE 🏢 Description: We are seeking a Java Developer to become a valued addition to our team. You will join a talented engineering community that delivers mission-critical solutions powering worldwide business operations and fostering innovation within the financial sector. This role offers a great chance to leverage your skills in a fast-paced setting, partnering with international peers and stakeholders on meaningful initiatives. 3 days per week in the office is expected. Responsibilities - Architect and implement solutions to tackle major business challenges through Java application development or by making use of the ION toolset - Improve and restructure existing components and solutions to boost performance, maintainability, and overall code quality - Drive UAT and demonstration sessions with key stakeholders, facilitating clear communication and achieving successful approvals - Extract critical information from business stakeholders and convert it into well-defined, actionable IT requirements - Work closely with other IT teams across the globe to provide cohesive, end-to-end solutions - Assist the production operations team during deployments and contribute to ongoing production support tasks Requirements - Minimum of 2 years of professional experience in software engineering roles - Strong practical background in Java for the creation of reliable server-side applications - Sound grasp of low-latency and multi-threaded programming for performance-critical systems - Deep familiarity with object-oriented programming concepts and design patterns - Exposure to functional programming is viewed as a significant advantage - Demonstrated experience operating within agile teams and applying agile practices - Strong comprehension of Rates and Credit bonds and derivatives, together with their underlying market behavior - Thorough understanding of the specific characteristics of trading venues like Bloomberg and TradeWeb - Practical experience using Kafka for messaging and event-driven communication - Outstanding verbal and written communication abilities in English (B2+ level or above) Nice to have - General awareness of Financial Market Instruments and how they are utilized in trading contexts - Advanced, expert-level proficiency with ION and substantial prior experience using the ION toolset - Previous involvement in bond pricing through PXE - Background in automated testing methods and continuous integration workflows - Working knowledge of scripting languages such as Python, Perl, or comparable alternatives

🏢 Summary: Senior Java Developer role focused on building and improving high-performance financial systems and trading solutions in a global environment. The position involves backend Java development, stakeholder collaboration, and integration with trading platforms and event-driven technologies. Hybrid work with 3 days per week in the office is expected. 🗂️ Requirements: 3+ years of commercial software development experience, Strong Java backend development experience, Knowledge of low-latency and multi-threaded systems, Understanding of object-oriented programming and design patterns, Experience working in agile teams, Knowledge of Rates and Credit bonds and derivatives, Understanding of Bloomberg and TradeWeb trading venues, Hands-on experience with Kafka, English proficiency at B2 level or higher 📃 Skills: Java, Kafka, ION, Bloomberg, TradeWeb, Python, Perl, PXE, OOP, Agile 🏢 Description: We are looking for a Senior Java Developer to join our team. You will become part of a skilled engineering group working on critical solutions that support our global business operations and drive innovation in the financial domain. This is an excellent opportunity to apply your expertise in a dynamic environment, working closely with international colleagues and stakeholders on impactful projects. 3 days per week in our office is expected. Responsibilities - Design and build solutions that address key business challenges, either by developing Java applications or leveraging the ION toolset - Refactor and enhance existing components and solutions to improve performance, maintainability, and overall quality - Lead UAT and demonstration sessions with key stakeholders, ensuring smooth communication and successful sign-off - Gather essential information from business stakeholders and translate it into clear, concise IT requirements - Collaborate effectively with other global IT teams to deliver integrated, end-to-end solutions - Support the production operations team during rollouts and provide assistance with production support activities Requirements - At least 3 years of relevant commercial experience in software development - Solid hands-on experience with Java for building robust backend applications - Good understanding of low-latency, multi-threaded code development for high-performance systems - Strong knowledge of object-oriented programming principles and design patterns, with exposure to functional programming considered a strong plus - Practical experience working within agile teams and following agile methodologies - Solid understanding of Rates and Credit bonds and derivatives, along with their market dynamics - Detailed knowledge of the nuances of trading venues such as Bloomberg and TradeWeb - Hands-on experience with Kafka for event streaming and messaging - Excellent oral and written communication skills in English (B2+ level or higher) Nice to have - Broader familiarity with Financial Market Instruments and their application in trading environments - Expert-level knowledge of ION and prior hands-on experience working with the ION toolset - Previous experience with bond pricing using PXE - Experience with automated testing practices and continuous integration pipelines - Proficiency in scripting languages such as Python, Perl, or similar

🏢 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: Lead Java Developer role focused on designing and delivering component-based services for a global fixed income trading platform, driving modernization, platform standardization, and high-quality software delivery. The position involves working with Java enterprise technologies, integrations, and supporting migration to a strategic platform in a global environment. You will own delivery outcomes and collaborate closely with business and IT stakeholders. 🗂️ Requirements: 7+ years of professional software development experience, Deep expertise in Core Java, Hands-on experience with SQL, Hands-on experience with Spring framework, Strong written and verbal English skills, Ability to collaborate with global teams 📃 Skills: Java, SQL, Spring, JMS, ORM, REST, WebServices, TCP/IP, Bash, Perl, Python, C++, Redis, Multithreading, Networking, Scrum, Kanban 🏢 Description: We are building a Lead Java Developer role to strengthen a global fixed income trading platform built on Java and enterprise standards. You will design and deliver component-based services using technologies like JMS, ORM, Spring, WebServices, REST, plus integrations across TCP/IP networking and scripting (bash, Perl, Python) and even C++. Apply now to help modernize the platform and drive high-quality delivery Responsibilities Design and implement software components that meet defined requirements Own delivery outcomes by ensuring software quality and agreed standards Partner with the customer to clarify and understand deliverables Support the business with platform rationalization and optimization efforts Drive reduction of technical debt and advance platform standardization Assist the business with migration to the strategic platform Collaborate with IT teams across global locations Requirements Proven 7+ years of professional experience in software development Deep expertise in Core Java Hands-on proficiency with SQL and the Spring framework Excellent communication and effective time management skills Collaborative team player mindset with a pragmatic approach to software delivery Strong English skills (written and verbal) Nice to have Experience with Java multithreading, networking, and web services Familiarity with JMS and Redis Ability to elicit and document requirements with strong focus on software quality Knowledge of the investment banking domain Understanding of Agile principles, including Scrum or Kanban 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

🏢 Summary: Hybrid Java Developer role focused on building and maintaining enterprise applications supporting critical business operations and next-generation management platforms. The position involves developing streaming applications, collaborating in Agile Scrum teams, applying BDD and CI/CD practices, and supporting global IT operations. Candidates will work with Java, Spring technologies, and Apache Kafka in a fast-paced international environment. 🗂️ Requirements: 2+ years of Java programming experience, Knowledge of Spring Framework, Knowledge of Spring Boot, Knowledge of Apache Kafka, Experience with Agile methodologies, Understanding of Scrum, Awareness of TDD, Awareness of BDD, Familiarity with CI/CD practices, Ability to refactor and improve legacy code, English proficiency at B2 level 📃 Skills: Java, Spring, SpringBoot, Kafka, Flink, Maven, Gradle, SQL, Unix, Scrum, CI/CD, BDD, TDD 🏢 Description: We are looking for a passionate Java Developer to join a global team that develops and maintains a suite of enterprise applications. The system supports critical business operations and serves as the foundation for a next-generation management platform. Team members work closely with operations teams and business analysts to provide global solutions for varied business requirements, with a strong focus on software craftsmanship, quality, and automation. This role offers a hybrid model, with 3 days per week working from the client's office in Krakow. Responsibilities - Develop new features and maintain the existing codebase - Build streaming applications with Apache Flink - Write unit, integration, and behavior tests - Cooperate within a successful scrum development team built on mutual respect - Collaborate to refine user requirements through behavior-driven development (BDD) - Partner with other global IT teams - Provide level 3 support, assisting the production operations team in rollout and support-related matters Requirements - 2+ years of experience in Java programming - Background in the Spring stack (Spring Framework, Spring Boot) - Knowledge of Apache Kafka - Showcase of clean coding and refactoring skills with great problem-solving ability - Hands-on experience with Agile methodologies, especially Scrum - Awareness of test- and behavior-driven development - Familiarity with CI/CD practices - Capability to improve older code bases, as well as apply modern best practices to new projects - Proactive mindset, comfortable working in dynamic environments with fast-paced deliveries and changing requirements - Strong written and verbal communication skills in English (B2 level), and the desire to work as part of a global team Nice to have - Expertise in Apache Flink - Proficiency in build tools (Apache Maven, Gradle) - Skills in SQL databases - Hands-on experience with Unix