Senior Java Developer/Tech Lead

🏢 Summary: Development of high-performance distributed trading systems in Java, focusing on scalability, latency optimization, and core platform components. The role involves system design, performance tuning, and close collaboration with trading and risk stakeholders in fast-paced financial environments. 🗂️ Requirements: 5+ years of experience developing financial systems in Java, Strong expertise in concurrency, Strong expertise in multi-threaded programming, Experience with distributed systems, Experience designing high-performance systems 📃 Skills: Java, Concurrency, Multithreading, DistributedSystems 🏢 Description: Senior Java Developer - financial systems We are looking for a Software Engineer to support the development of high-performance trading systems operating in distributed environments. The role involves contributing to system design, improving performance and scalability, and collaborating closely with both engineering and business teams. Responsibilities Design and build core components of distributed trading platforms Review code and architecture to ensure quality and performance Identify and resolve scalability, stability, and latency issues Work with trading, risk, and portfolio management stakeholders Requirements 5+ years of experience developing financial systems in Java Strong expertise in concurrency and multi-threaded programming Experience with distributed systems Strong communication skills and ability to work in fast-paced environments

🏢 Summary: Senior Tech Lead / Java Developer role focused on building and optimizing ultra-low latency, high-throughput trading systems within a global investment firm’s core trading infrastructure team. The position involves architecting and scaling distributed backend platforms, driving end-to-end technical initiatives, and leading engineering standards in a mission-critical environment. Ideal for an expert in concurrent Java systems who thrives on performance tuning and complex system design. 🗂️ Requirements: 10+ years commercial experience in Java backend development, Proven experience building ultra-low latency, high-throughput systems, Advanced knowledge of concurrency and multithreading, Practical experience with lock-free data structures, Deep understanding of distributed systems architecture, Experience leading large-scale, complex engineering projects, Hands-on experience with AI-assisted coding tools, Ability to work in high-stakes financial environments 📃 Skills: Java, Multithreading, Concurrency, DistributedSystems, LockFreeDataStructures, AI, Backend, PerformanceTuning 🏢 Description: Our client is a top-tier global investment firm . We are currently looking for an exceptional Tech Lead / Senior Developer to join their Core Trading Infrastructure group. This team is responsible for engineering the ultra-low latency platforms that drive the firm's global trading operations. You will be working on highly concurrent, distributed systems where processing large volumes of data within microseconds is an absolute necessity. We are searching for a hands-on technical expert who loves solving hard engineering puzzles, scaling systems, and taking full ownership of critical platforms from design to deployment. Tech Stack: Java (Expert) Multithreading / Concurrency (Expert) Distributed Systems (Advanced) AI Dev Tools (Regular) 🚀 What you will do: Architect & Develop: Build and maintain critical, highly robust trading algorithms and distributed backend components. End-to-End Delivery: Drive major technical initiatives from the initial whiteboard phase all the way to production rollout and maintenance. Technical Leadership: Act as a technical authority within the group. Guide architectural decisions, enforce high engineering standards, and conduct rigorous code reviews. Performance Tuning: Continuously profile and optimize systems to shave off microseconds, maximizing throughput and ensuring bulletproof stability. Cross-functional Collaboration: Work closely with research analysts, portfolio managers, and trading desks to translate complex business needs into scalable technical solutions. System Evolution: Proactively identify bottlenecks and areas for modernization within the existing infrastructure. 🎯 What we expect from you: 10+ years of commercial experience designing and building ultra-low latency, high-throughput backend systems in Java . Advanced knowledge of concurrency, multithreading , and practical implementation of lock-free data structures . Deep understanding of distributed systems architecture and how to scale platforms reliably. Proven history of leading large-scale, complex engineering projects. Strong mentoring skills with a passion for elevating the technical abilities of the engineers around you. Resilience and adaptability in a fast-paced, high-stakes financial environment. Hands-on experience with modern AI-assisted coding tools (for generation, planning, or testing). 💡 Why this opportunity? This is a chance to tackle some of the most demanding engineering challenges in the financial sector. You will be joining an elite group of technologists where your code directly impacts the bottom line, operating in an environment that heavily invests in modern tech and outstanding talent.

🏢 Summary: Senior Java Developer role focused on building and evolving a globally distributed trading platform for fixed income products. The position involves designing and implementing high-quality software components, supporting platform optimization and migration, and collaborating with international IT teams. It requires strong expertise in Core Java, Spring, and SQL within enterprise-level systems. 🗂️ Requirements: At least 5 years of experience in software development, Strong knowledge of Core Java, Proficiency in SQL, Proficiency in Spring framework, Strong written and verbal English, Ability to work collaboratively in a global team environment 📃 Skills: Java, SQL, Spring, JMS, ORM, REST, WebServices, TCP/IP, Bash, Perl, Python, C++, Redis, Multithreading, Networking, Scrum, Kanban 🏢 Description: We are seeking a Senior Java Developer to join a leader in the financial domain who has been successfully involved in trading financial (Fixed income) products for many years. As part of this, a globally distributed, component-based IT system has been built. It is written mainly in Java and incorporates many enterprise technologies/standards (e.g., JMS, ORM, Spring, WebServices, REST), but also integrates other technologies, like TCP/IP networking, bash scripting, Perl, Python or even C++. Responsibilities Design and implement software components according to requirements Take responsibility for ensuring the delivery and quality standards of software Spend time with the customer to determine and understand deliverables Support business in platform rationalization and optimization Continue removing technical debt and platform standardization Support business in migration to strategic platform Work with other IT teams across the globe Requirements At least 5 years of working experience in software development Strong knowledge of Core Java Proficiency in SQL and Spring framework Good communication and time management skills Team player mentality with a pragmatic approach to software development Strong written and verbal English Nice to have Skills in multithreading, networking and web services in Java Familiarity with JMS and Redis Capability to acquire and capture requirements with attention to software quality Understanding of investment banking domain Understanding of Agile principles (experience in 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: 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 Software Developer role focused on developing and maintaining a high-performance electronic trading platform, with responsibility for backend Core Java components and Level 3 production support. The position involves implementing new features, writing automated tests, and collaborating closely with trading teams to enhance platform design and performance. 🗂️ Requirements: 10+ years of Core Java development experience, Experience with trading platforms or real-time systems, Experience writing automated functional and performance tests using Cucumber, Ability to provide Level 3 production support on rotational schedule, Degree in Computer Science or Java certification 📃 Skills: Java, Spring, Cucumber, Solace, Oracle, REST, ION, ADO 🏢 Description: About the Role: We are looking for a Senior Software Developer to join a growing team focused on enhancing and maintaining a high -performance electronic trading platform. You will work on backend components, implement new features, and provide Level 3 production support on a rotational basis. The role offers direct collaboration with trading teams and opportunities to influence platform design and improvements. Responsibilities: Analyze, design, develop, and document Core Java server-side components Write automated functional and performance tests using Cucumber Provide L3 production support in a rotational schedule (mostly aligned with London business hours) Collaborate with a global team and trading stakeholders Must Have: 10+ years of experience with Core Java development Experience working on trading platforms or similar real-time systems Java certification preferred or a degree in Computer Science Strong communication skills and ability to work with business stakeholders Experience writing automated functional and performance tests with Cucumber Nice to Have: Knowledge of ION MarketView Java API Understanding of Fixed Income trading (Dealer-to-Client eTrading of Bonds) Experience with Spring Boot Familiarity with ADO pipelines for build and deployment Experience with REST APIs Technology Stack: Backend: Core Java, Spring Boot Messaging: Solace Database: Oracle

🏢 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: Senior Java Developer role focused on developing, maintaining, and modernizing employee-facing platforms in a complex enterprise environment within the financial sector. The position involves working with both modern and legacy technologies, operational support, troubleshooting, and ensuring platform stability for approximately 9,000 daily users. 🗂️ Requirements: 5+ years of Java development experience, Experience in complex enterprise environments, Ability to work with modern and legacy solutions, Collaborative mindset, Pragmatic approach to problem solving 📃 Skills: Java, WebSphere, Tomcat, JBoss 🏢 Description: On behalf of a client in the financial sector, we are looking for a Senior Java Developer. The consultant will join the team responsible for developing and maintaining employee-facing platforms. The team comprises software developers, a Product Owner, an IT architect, and a manager, collectively supporting approximately 9,000 employees. The application landscape includes modern and legacy technologies, ensuring a robust platform used daily. Main Responsibilities: Contribute to the development, maintenance, and operation of the team’s solutions Learn and understand the domain, architecture, and surrounding integrations Participate in operational activities, including monitoring, patching, and ensuring high availability Support troubleshooting, analysis, and technical improvements Help simplify and modernize existing solutions Contribute to knowledge sharing and long-term continuity Help ensure a stable and reliable platform used daily by approximately 9,000 employees Key Requirements: Strong Java development competencies (5+ years of experience) Experience in complex enterprise environments Ability to navigate both modern and legacy solutions. Pragmatic and collaborative mindset Nice to Have: Experience with enterprise application platforms such as WebSphere, Tomcat, JBoss, or similar technologies is considered an advantage, as large parts of the application landscape rely on WebSphere-based solutions.

🏢 Summary: Senior Java Developer role focused on building and enhancing high‑performance, low‑latency front‑office trading systems for Commodities and FX markets. The position involves developing real‑time, front‑to‑back trading platforms covering pricing, execution, and risk management. Work includes delivering reliable, high‑throughput Java services within a global trading environment. 🗂️ Requirements: 5+ years of Java back-end development experience, Strong knowledge of HTTPS and REST APIs, Experience with microservices architecture, Experience with MQ systems, Proficiency in SQL, Experience with Postgres or Sybase, Understanding of high-availability architectures, Experience building low-latency, high-throughput systems, Experience delivering Java-based services 📃 Skills: Java, REST, HTTPS, Microservices, MQ, SQL, Postgres, Sybase, CI/CD, Agile, FX, Commodities 🏢 Description: Senior Java Developer– Commodities Trading B2B | Hybrid | Kraków | 2 days per week | Global Investment Bank We are supporting a global financial institution in hiring an experienced Senior Java Engineer for its Commodities technology team. The role focuses on building and improving front‑office trading systems used across global markets, with an emphasis on performance, reliability, and real‑time processing. Role Overview Develop and support front‑to‑back trading systems, including exchanges, client portals, and trade lifecycle components Build high‑performance Java services used across Commodities and FX trading Enhance and maintain low‑latency, high‑throughput electronic trading applications Deliver cross‑product front‑office platforms for pricing, execution, and risk management Contribute to real‑time risk capabilities across global trading workflows Required Experience 5+ years’ experience in Java back‑end development Strong knowledge of HTTPS, REST APIs, microservices, and MQ Proficiency in SQL and experience with Postgres or Sybase Understanding of high‑availability service architecture Experience owning or leading the delivery of Java‑based services Strong communication skills and ability to work with global teams Analytical approach, fast learner, and proactive in keeping technical skills current Ability to remain calm and effective in time‑sensitive situations Preferred Experience Exposure to production support Experience with Agile, CI/CD environments Domain knowledge in trade lifecycle, post‑trade, or FX/Commodities

🏢 Summary: Senior Java Tech Lead role focused on leading backend development, defining technical architecture, mentoring engineers, and delivering scalable microservices solutions in an Agile environment. The position combines hands-on Java development with technical leadership, code quality oversight, and collaboration with stakeholders. Experience with Spring, Oracle SQL, distributed systems, and backend security is required. 🗂️ Requirements: Experience leading technical teams, Strong Java 11-25 expertise, Advanced knowledge of memory management, Advanced knowledge of concurrency, JDBC experience, Experience with Spring Boot, Experience with JPA, Experience with Hibernate, RDBMS knowledge, Oracle SQL development, Query optimization skills, Microservices architecture knowledge, Asynchronous messaging experience, REST API development, OpenAPI knowledge, API-First approach experience, Git proficiency, Maven proficiency, Backend security knowledge, Unit testing experience, Integration testing experience, Fluent English 📃 Skills: Java, JDBC, Spring, SpringBoot, JPA, Hibernate, Oracle, SQL, Microservices, REST, OpenAPI, Swagger, Git, Maven, Kubernetes, Ansible, OpenSearch, Jenkins, SonarQube 🏢 Description: Java Tech Lead We are looking for a seasoned Java Developer with natural leadership qualities. In this role, you won't just write clean, scalable code—you will champion the technical direction, unblock your engineering team, and act as a bridge between technical execution and business vision. Key Responsibilities Technical Leadership: Spearhead architectural and solutioning discussions with stakeholders to map out the best technical paths. Team Empowerment: Actively remove bottlenecks within the delivery pipeline and mentor team members to help elevate their technical skills. Quality Assurance: Guard technical standards, ensuring all deliverables align with security benchmarks, code quality metrics, and engineering best practices. Backend Development: Drive hands-on development across multiple applications, tackling both brand-new greenfield projects and the evolution of existing systems. Collaboration & Process: Drive proactive technical analysis, conduct thorough code reviews, and actively participate in Scrum ceremonies. Requirements Leadership & Soft Skills: Exceptional communication and coordination skills. Proven ability to identify the technical critical path and take decisive steps to ensure successful delivery. A strong sense of ownership, multitasking abilities, and a highly proactive, self-sufficient mindset. Technical Expertise: Strong command of Java (from version 11 up to 25) and advanced concepts, including memory management, concurrency, and JDBC. Extensive experience with the Spring ecosystem (Spring Boot 2 to 4) and JPA/Hibernate . Solid RDBMS experience, with a specific focus on Oracle SQL development and query optimization . Deep understanding of microservices architecture , asynchronous messaging systems, and web communication ( REST, OpenAPI/Swagger, and API-First approach ). Everyday proficiency with Git and Maven . Sound knowledge of backend security practices and a commitment to writing clean, high-coverage unit and integration tests. Fluency in English (both written and spoken). Nice to Have Hands-on experience with cloud-native and infrastructure tools like Kubernetes , Ansible , or OpenSearch . Familiarity with build and deployment automation ( CI/CD via Jenkins, SonarQube ). Experience implementing automated testing frameworks. Past involvement in high-level technical architecture and design. Experience working within geographically distributed, international teams.

🏢 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 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.