Java Engineer Jobs

Who We Are At OKX, we believe that the future will be reshaped by Crypto, ultimately contributing to every individual's freedom. OKX began as a crypto exchange giving millions of people At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. Responsibilities Payment System Development: Design, develop, and optimize OKX Pay's payment backend systems; build highly available, high-concurrency, scalable payment infrastructure. Scan-to-Pay Capabilities: Contribute to core QR/scan-to-pay functionality across the critical path — payment code generation, scan recognition, order creation, payment confirmation, state transitions, timeout handling, risk-control validation, and exception compensation. Transaction Processing & Fund Flows: Design and implement secure, stable transaction processing systems covering orders, payments, clearing and settlement, reconciliation, refunds, and callback notifications. Crypto & Stablecoin Payments: Build crypto and stablecoin payment capabilities — on-chain transfers, transaction confirmation, address management, asset crediting, and payment-status synchronization — and integrate them with traditional payment experiences

OUR MISSION At Redwood, we empower our customers with lights-out automation for their mission-critical business processes. ABOUT US Redwood Software is the leader in full stack automation fabric solutions for mission-critical business processes. With the first SaaS-based composable automation platform specifically built for ERP, we believe in the transformative power of automation. Our unparalleled solutions empower you to orchestrate, manage and monitor your workflows across any application, service or server — in the cloud or on premises — with confidence and control. Redwood’s global team of automation experts and customer success engineers provide solutions and world-class support designed to give you the freedom and time to imagine and define your future. Get out of the weeds and see the forest, with Redwood Software. CORE VALUES One Team. One Redwood Make Your Own Weather Obsess over Customer Success Work the Problem Be Curious Own the Outcome Respect Each Other YOUR IMPACT We are looking for a Senior Software Engineer to join our engineering team and help drive the design, development, and enhancement of our platform. You will build high-quality, scalable, and secure software that powers enterprise data exchange for more than 1,000 customers worldwide. Architect and develop enterprise-grade services using Java 11+, Spring Boot, Spring Data, Hibernate Design and optimize highly available, high-throughput systems for file transfer and data processing Build and maintain RESTful APIs and integration endpoints for enterprise customers Implement security best practices across authentication, authorization, and encryption Contribute to React-based front-end development for admin and monitoring interfaces Leverage Docker and Kubernetes to build and deploy cloud-native services Partner with Product Management to translate requirements into scalable technical designs Lead code reviews, drive continuous improve

OUR MISSION At Redwood, we empower our customers with lights-out automation for their mission-critical business processes. ABOUT US Redwood Software is the leader in full stack automation fabric solutions for mission-critical business processes. With the first SaaS-based composable automation platform specifically built for ERP, we believe in the transformative power of automation. Our unparalleled solutions empower you to orchestrate, manage and monitor your workflows across any application, service or server — in the cloud or on premises — with confidence and control. Redwood’s global team of automation experts and customer success engineers provide solutions and world-class support designed to give you the freedom and time to imagine and define your future. Get out of the weeds and see the forest, with Redwood Software. CORE VALUES One Team. One Redwood Make Your Own Weather Obsess over Customer Success Work the Problem Be Curious Own the Outcome Respect Each Other YOUR IMPACT We are looking for a Software Engineer to join our engineering team and help drive the design, development, and enhancement of our platform. You will build high-quality, scalable, and secure software that powers enterprise data exchange for more than 1,000 customers worldwide. As a Software Engineer on the team, you will help build secure, reliable, and scalable enterprise software that enables our customers to automate their most critical data exchange workflows. Develop backend services and microservices using Java/Spring Boot Solid understanding of object-oriented programming (OOP), design patterns, and software architecture principles. Implement and consume RESTful APIs to integrate with customer systems Enhance monitoring, logging, and observability of the platform Ensure security and compliance across file transfer workflows Write clean, maintainable, and well-tested code Work closely with senior engineers and gain exposure to architectural decision-ma

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Java Software Engineer Our engineers are reshaping the payments landscape. We’re looking for more talented problem solvers to help us address a unique set of challenges. As an engineer at Adyen, you will be responsible for the full development cycle from software design to testing and ensuring everything works as expected in production. You will work with one of the biggest PostgreSQL databases out there, focusing on maintaining the platform's performance and reliability. We are looking for Java Engineers and Senior Java Engineers for a number of teams within our payments solution. Payments solution: As a Java Software Engineer within payments solution, you will build and improve integrations at a global scale for in-store and online payments. We make sure that our merchants and partners have a seamless integration with the Adyen platform. We are responsible for: Building the best and most efficient payment engine globally Building connections to all relevant payment methods and card schemes (Visa,Mastercard, Amex, etc) worldwide. Removing the complexity for our businesses to integrate them separately. Create a high-available, highly-scalable payment processing platform and connect to hundreds of external APIs. Given our global scale, automating all core processes to match funds to the penny, is a continuous challenge. D

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Staff Java Engineer - Merchant Fraud Prevention As a Staff Software Engineer in the Merchant Fraud Prevention group, you will serve as the core architect and strategic engineering partner for our fraud detection and mitigation ecosystems. You will define the long-term technical vision across 2–3 engineering teams, ensuring our Platforms can detect and prevent evolving fraud vectors at scale. Beyond technical leadership, you will be a key force multiplier, acting as a strategic advisor to engineering leadership, bridging the gap between business strategy and execution, and actively mentoring and growing our senior Individual Contributors (ICs). What you'll do Technical Strategic & Architecture: Own the multi-year technical north star vision for the group, together with the technical leads of each team in the group. Design and evolve high-throughput, low-latency distributed systems capable of processing real-time merchant transactions, integrating complex machine learning models, and handling massive big data pipelines. Leadership Partnership: Partner closely with the Director of Engineering to assess organizational health, surface systemic engineering bottlenecks, and align long-term technical investments with Merchant protection goals. Product Strategy: Shape the strategic roadmap alongside the Director of Engineer

Everpure (NYSE: P) has evolved from storage pioneer to data platform, closing fiscal 2026 with $3.7 billion in revenue, its first billion-dollar quarter, and accelerating growth into FY27. Our strategic agenda spans the companies defining the next era of technology - hyperscalers, AI labs, the AI hardware supply chain, data platform providers, and the broader AI ecosystem. This type of work—work that changes the world—is what the tech industry was founded on. So, if you're ready to seize the endless opportunities and leave your mark, come join us. THE ROLE 1touch.io is a technology company focused on automated, real-time discovery, mapping, and tracking of sensitive personal data. Its AI-powered platform helps enterprises improve data privacy, security, and governance across complex on-premises and cloud environments. Together, 1touch.io and Everpure transform enterprise data from passive storage into an intelligent, context-aware, and governed foundation - making it AI-ready at the source so organizations can securely understand, trust, and activate their data at scale. As a Mainframe Software Engineer, you will help design, develop, and modernize core data discovery and scanning capabilities across enterprise systems. You will focus on a Java-based mainframe agent running on IBM z/OS, enabling scalable access to critical mainframe data sources while supporting the modernization of legacy implementations. Working within a broader Java engineering team, you will contribute to cross-platform solutions, share mainframe expertise, and help evolve modern platform capabilities and architecture. WHAT YOU'LL DO Design, develop, and maintain a Java-based agent running on IBM z/OS systems. Build capabilities to scan and interact with mainframe technologies, including VSAM, QSAM, IMS, DB2, flat files, and system-level resources. Design, implement, and support scalable software solutions from development through production operations. Build and maintain scalable microservices

At Snowflake, we are powering the era of the agentic enterprise. To usher in this new era, we seek AI-native thinkers across every function who are energized by the opportunity to reinvent how they work. You don’t just use tools; you possess an innate curiosity, treating AI as a high-trust collaborator that is core to how you solve problems and accelerate your impact. We look for low-ego individuals who thrive in dynamic and fast-moving environments and move with an experimental mindset — who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results. At Snowflake, your role isn't just to execute a function, but to help redefine the future of how work gets done. Build the Future of Data. Join the Snowflake Team. We are actively hiring software engineers from Europe and around the world for our European Engineering Center. Our office is located at Potsdamer Platz, in the heart of Berlin. It’s easily accessible by train, subway, bus, or bicycle – with numerous restaurants, cafes, and shops within walking distance. The official language for this office is English. This is a fantastic opportunity to join a team of skilled engineers, building and maintaining the future of the Java infrastructure that powers the data cloud. As part of this team, you will work on the core Java libraries and JVM infrastructure that support our scalable, high-performance platform, impacting millions of users globally. AS A SOFTWARE ENGINEER ON THE JAVA PLATFORM TEAM, YOU WILL: Contribute to building the next-generation systems that make using Java safe, efficient, and secure Help provide a consistent, high-performance platform that Snowflake engineers can use to deliver high-quality solutions to production. Identify performance and availability issues, implement effective solutions, and instrument key components as needed. Collaborate with global teams to solve real-world, large-scale challenges in data infrastructure. Continuously improve the reliability a

Reolink , a leader in intelligent visual technology for homes and businesses, was founded in 2009 by a group of engineers with a strong commitment to and passion for smarter security solutions. Our products are now trusted by millions of users across more than 110 countries and regions worldwide. Building on this trust, we continue expanding our presence and bringing our innovations to more markets around the globe. Reolink remains committed to delivering advanced, reliable, and user‑centric solutions that empower people to protect what matters most. Position: Software Engineer | Java Developer 5 Work Days Per Week Office Near Tai Seng MRT, Singapore Medical Benefits Provided Entitled to Yearly Bonus & Performance Bonus Job Requirements Bachelor's or Master's Degree in Computer Science, Software Engineering, or a related technical discipline Minimum 1 year experience of software development experience (Java Programming) is preferable for this post Strong understanding of computer science fundamentals (operating systems, network principles, data structures, and algorithms) Programming Languages: Spring Core, Spring Boot, Spring Security Cloud Platforms: AWS and Azure Frameworks: Common open-source frameworks and tools such as Kafka, RocketMQ, Dubbo, Zookeeper, and Redis. Deep knowledge of MySQL, including schema design, SQL optimization, and database scaling strategies. Job Responsibilities ( Software Developer / Java Backend Engineer) Design & Development Take ownership of the design, development, refactoring, and performance optimization of core system components, delivering high-quality and maintainable code. Technical Innovation & Problem-Solving Research, design, and implement innovative solutions to address complex business and technical problems, particularly in high-concurrency scenarios. System Architecture Contribute to system architecture decisions, focusing on scalability, high availability, and fault tolerance. Full-Lifecycle Part

Senior Backend Engineer – Java Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Power the platforms behind modern finance. Shape cloud-native solutions with Java at their core. The Role We’re seeking a Senior Backend Engineer ( Java ) to join our Technology & Engineering team. You’ll bring expertise in building robust, scalable, cloud-native applications using Java , Spring Boot , and AWS . Working on high-impact platforms for Tier 1 financial institutions, you’ll help shape backend architecture, champion engineering best practices, and contribute to the evolution of modern banking technology. You'll also embrace AI-enabled ways of working, using approved AI and automation tools where appropriate to improve engineering productivity, accelerate delivery, and enhance software quality while applying sound engineering judgement and responsible AI practices. What You’ll Do Design and build cloud-native, microservices -based applications using Java (11+) and Spring Boot . Deliver enterprise-ready solutions on AWS , applying modern engineering practices and AI-enabled development approaches where appropriate to improve delivery efficiency and code quality. Build, maintain, and optimise CI/CD pipelines to support secure, scalable, and reliable software deployments. Develop comprehensive automated tests and promote quality-driven engineering practices across the software development lifecycle. Collaborate with agile teams to solve complex technical challenges, contribute to architecture decisions, and encourage the responsible use of approved AI tools and automation to enhance collaboration and delivery. What We’re Looking For Strong expertise in Java (11, 17, 21+) and Spring Boot , with experience building enterprise-grade backend applications. Deep knowledge of public cloud platforms, preferably AWS , alongside cloud-native, microservices , and event-driven architectures. Proven experience with CI/CD pipelines, SQL and NoS

Senior Backend Engineer – Java Location: Glasgow (Hybrid) | Practice Area : Technology & Engineering | Type: Permanent Power the platforms behind modern finance. Shape cloud-native solutions with Java at their core. The Role We’re seeking a Senior Backend Engineer (Java) to join our Technology & Engineering team. You’ll bring expertise in building robust, scalable, cloud-native applications using Java, Spring Boot, and AWS. Working on high-impact platforms for Tier 1 financial institutions, you’ll lead backend design, champion agile best practices, and contribute to the evolution of modern banking technology. This role will sit in our Scotland office, with a need to potentially work in either Edinburgh or Glasgow depending on client expectations. What You’ll Do Design and build microservices-based applications using Java 11+ and Spring Boot Deliver enterprise-ready cloud solutions, with a focus on AWS infrastructure and services Build and manage robust CI/CD pipelines and ensure secure, scalable deployments Write comprehensive tests and implement quality-driven development across the stack Collaborate in agile teams and contribute to design decisions, troubleshooting, and continuous improvement What We’re Looking For Expert-level Java development (Java 11, 17, 21+), Spring Boot proficiency Deep knowledge of public cloud environments, preferably AWS Experience designing cloud-native, microservices, and event-driven architectures Strong grasp of CI/CD pipelines, SQL/NoSQL databases, Kafka, and Java Streaming Familiarity with infrastructure-as-code (e.g., CloudFormation), distributed systems, and secure design practices Bonus Points For Experience using GitLab for CI/CD pipelines and Cucumber for BDD test automation AWS Certified Solutions Architect (Associate or Professional) Knowledge of CQRS patterns and performance testing strategies Passion for exploring emerging cloud technologies and frameworks Experience delivering customer-facing or business-critical a

Senior Backend Engineer – Java Location: Edinburgh (Hybrid) | Practice Area : Technology & Engineering | Type: Permanent Power the platforms behind modern finance. Shape cloud-native solutions with Java at their core. The Role We’re seeking a Senior Backend Engineer (Java) to join our Technology & Engineering team. You’ll bring expertise in building robust, scalable, cloud-native applications using Java, Spring Boot, and AWS. Working on high-impact platforms for Tier 1 financial institutions, you’ll lead backend design, champion agile best practices, and contribute to the evolution of modern banking technology. This role will sit in our Scotland office, with a need to potentially work in either Edinburgh or Glasgow depending on client expectations. What You’ll Do Design and build microservices-based applications using Java 11+ and Spring Boot Deliver enterprise-ready cloud solutions, with a focus on AWS infrastructure and services Build and manage robust CI/CD pipelines and ensure secure, scalable deployments Write comprehensive tests and implement quality-driven development across the stack Collaborate in agile teams and contribute to design decisions, troubleshooting, and continuous improvement What We’re Looking For Expert-level Java development (Java 11, 17, 21+), Spring Boot proficiency Deep knowledge of public cloud environments, preferably AWS Experience designing cloud-native, microservices, and event-driven architectures Strong grasp of CI/CD pipelines, SQL/NoSQL databases, Kafka, and Java Streaming Familiarity with infrastructure-as-code (e.g., CloudFormation), distributed systems, and secure design practices Bonus Points For Experience using GitLab for CI/CD pipelines and Cucumber for BDD test automation AWS Certified Solutions Architect (Associate or Professional) Knowledge of CQRS patterns and performance testing strategies Passion for exploring emerging cloud technologies and frameworks Experience delivering customer-facing or business-critical

Principal Backend Engineer – Java Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Build scalable backend solutions that help shape the future of financial services. The Role Capco is growing our Engineering team, and we’re looking for experienced Principal Backend Engineers with strong Java skills and a passion for delivering innovative solutions in financial services. As a Principal Backend Engineer at Capco, you’ll contribute to high-impact, client-facing projects and work with cloud-native technologies across different domains within Financial Services & Energy. You’ll collaborate with talented engineers, contribute to architecture and engineering decisions, and have access to industry-leading learning and development opportunities. You’ll also use approved AI tools, automation and AI-enabled engineering workflows where appropriate to improve development speed, quality and productivity, while applying human judgement, responsible AI guardrails and appropriate review. What You’ll Do Build and deliver scalable backend services using Java 11, 17+, designing APIs and microservices for enterprise systems. Work across cloud platforms, particularly AWS, applying cloud-native deployment techniques and contributing to architecture and solution design. Develop robust automated test coverage across unit, component, integration, end-to-end and performance testing. Collaborate with clients, product managers and engineers in agile teams to design, deliver and troubleshoot large-scale distributed systems. Use approved AI tools, automation and AI-enabled workflows to support engineering activities such as development, testing, troubleshooting and documentation, with appropriate human review and responsible AI controls. What We’re Looking For Expertise in Java 11, 17+ and Spring Boot, with experience designing and delivering large-scale enterprise backend systems. Experience with cloud-native and distributed architectures, including m

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. As a Senior Java Developer in Payments You'll have the opportunity to: Work in a platform which process tens of millions payments per day Be involved in solutions to provide payments solution to the world's leading companies such as: Facebook, Uber, Spotify, Dafiti, 99Taxis, Rappi and many more Integrate to mostly used payment methods in the world, ex.: Visa and Mastercard, but not limiting to those What you’ll do: Design, implement, test and monitor new features Identify and improve parts of the platform to make it more robust and scalable Collaborate across teams and time zones to make things happen, review code and be open to feedback Communicating with stakeholders and merchants and monitoring the impact of new features Who you are: High skilled with Java. Familiar with complex and high performance platform. Able to coach and train other developers. Someone with these skills: eye for detail, taking ownership, flexible and a team player. Able to communicate in English and Portuguese (Both fluent). This role is based out of our Sao Jose dos Campos office (3 days in person). Our Diversity, Equity and Inclusion commitments Our unique approach is a product of our diverse perspectives. This diversity of backgrounds and cultures is essential in helping us maintain our momentum. Our business and technical challenges are unique, an

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Lead Software Engineer - Java Backend Overview Be part of the Operations & Technology Fraud Products team developing new capabilities for MasterCard's Decision Management Platform, which serves as the core for multiple business solutions to combat fraud and validate cardholder identity. Our patented Java-based platform processes billions of transactions per month in tens of milliseconds using a multi-tiered, message-oriented approach for high performance and availability. • Would you like to develop industry leading solutions for fighting fraud? • Are you motivated by speeding business solutions to market? • Do you want to innovate, using cutting edge technologies on challenging business problems? Required Skills / Qualifications : • Overall career experience of 8-12 years into Software Engineering in Java • Demonstrates strong ownership and the ability to learn and adapt quickly. Proven ability to lead through influence by aligning others, driving decisions, and unblocking delivery. • Solid understanding of service and platform level system design (e.g. distributed systems, event driven architectures), advanced design patterns (e.g. dependency injection, lazy loading) and experience with open frameworks (e.g. Spring Boot). • Strong software engineering fundamentals with hands

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. Position Description We are seeking an experienced Senior Software Engineer to join the Advanced Integration Builder team within Okta. This team builds and maintains the backend services, provisioning frameworks, authentication connectors, and next-generation Entitlement Management engines that let Okta customers secure, integrate, and govern access to thousands of third-party enterprise applications — from modern cloud platforms (Microsoft Office 365, Workday, Salesforce, AWS, ServiceNow) and AI agentic systems to legacy on-prem systems. As a Senior Engineer, you will own the technical design and implementation of integration components end-to-end: REST/SOAP API clients, OAuth2/SAML authentication flows, user and group provisioning/sync jobs, and the retry and rate-limiting logic required to operate reliably against dozens of idiosyncratic third-party vendor APIs at scale. This is a backend-intensive role — the large majority of your time will be spent in Java/Spring Boot services — but you'll also need decent frontend experience in React and JSP to build and extend the screens that surface integration configuration to customers Job Duties and Responsibilities - Feature Execution: Drive technical design and implementation of integration features — new app connectors, provisioning/sync capabilities, authentication flows — primarily in backend Java services, extending into React/JSP configuration screens. - Build and maintain REST/SOAP API clients, OAuth2/SA