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Ready to take your career global? Make your mark at one of the biggest names in payments. We are seeking an experienced Senior ML Software Engineer to join our ML team, with a strong focus on payment optimization. You will be the primary software engineering expert for a product area, working as part of a cross-functional agile team and owning the successful launches and ongoing operations of high-profile products in production. This is a senior software engineering / MLOps role focused on building and operating production services and platform capabilities, not a model research role. Data science experience is valuable but secondary to production engineering and operational ownership. Your focus will be on driving new feature delivery, maintaining operational excellence, and collaborating on enhancements to our shared ML platform. In addition to technical expertise, this job requires strong collaboration skills. You will work closely with cross-functional collaborators—including ML research engineers, product managers, and platform engineers—to deliver scalable, reliable, and low-latency ML solutions. What you’ll own Software and Service Delivery: Design, implement, and deploy software features, backend services, and APIs that operationalize ML models in production (with a focus on backend, API, and service work, rather than model research). Technical Ownership and Stewardship: Full technical ownership of existing and new production ML services in your area, ensuring alignment of technical investments with business goals and engineering best practices. End-to-end stewardship of service reliability and performance (SLO-driven). Contribute to the ML platform: Evolve shared platform tooling and standards to improve developer velocity, reliability, and repeatable delivery across teams. Operational Excellence: Maintain and improve automated CI/CD pipelines, testing frameworks, and monitoring/logging; own pre-release testing, rollouts, and release coordination. Participate in on-call rotations and lead incident response, root cause analysis, and remediation for your product area. Leadership: Provide technical guidance to engineers and data scientists, mentor teammates, and drive continuous improvement and knowledge sharing.   What you’ll bring 5+ years as an software engineer, MLOps Engineer, or similar, with hands-on production experience operating backend services or ML-backed APIs Proven expertise deploying ML models as production services, API design, and service integration Strong Python skills and service/backend engineering experience (ideally in FastAPI/OpenAPI, Flask, Go, or Java) Production experience with containerization and orchestration (ideally Kubernetes – EKS/OpenShift), Docker, and IaC (ideally Terraform or Terraform Cloud) Ownership of CI/CD pipelines, monitoring/alerting, and on-call/incident response Experience monitoring, troubleshooting, optimizing production ML systems (latency, throughput, availability) Excellent communication and cross-functional collaboration skills Demonstrated ability to work independently, navigate ambiguity, resolve blockers, and deliver results with a strong sense of urgency   It’s a bonus if you have Experience with MLFlow / model versioning, SageMaker Pipelines, or Databricks Familiarity with real-time, high-volume data products and low-latency data stores (e.g. DynamoDB) Automated testing and validation frameworks for models and services Experience in regulated industries (e.g. PCI, HIPAA, SOC2), large companies, or mature engineering teams Optional familiarity with LLM tooling / RAG   Why Join Us? Impact: Own high-profile ML-backed services that power customer-facing products driving measurable business outcomes Autonomy: Take end-to-end technical ownership of your product area, with the responsibility and freedom to drive robust technical solutions, shape best practices, and deliver results in a fast-paced, supportive environment. Collaboration: Join a cross-functional, high-performing team where your expertise is valued and grow with industry experts across engineering and product.   About the team Our inclusive and global teams win together every day. We’re proud to have the best minds in the industry, whom you can learn from as you grow your career. The people, the energy, and the connections are unmatched. Come and be part of an ever-evolving company and get dynamic opportunities that transcend borders.   What makes a Globalpayer? Globalpayers think like a client, act like an owner, and win as one team. We’re curious and innovative – always finding better ways to deliver impact. We empower each other to make decisions, and our passion drives excellence in everything we set out to do.   Does this sound like you? Then you sound like a Globalpayer. Apply now to take your career global.

Ready to take your career global? Make your mark at one of the biggest names in payments. We’re looking for Software Engineer - Java to join our ever-evolving WPG team and help shape the future of global commerce. Whilst web development skills are crucial, a background payments and fintech would be extremely beneficial. What you’ll own You will be working on one of the largest-by-volume global payment platforms in the world, focussing intensively on robustness, security, and capacity that can process over 800 transactions every second and exceeding 10 million successful payments every day. Design and develop solutions in Java, SQL, and PLSQL to ecommerce payments gateway as part of a team, in line with: The needs of a high-capacity mission-critical 24/7 service with 5 nines uptime Product specifications and drivers of business value Worldpay architectural and software engineering principles Department standards and practices e.g. code quality, agile ways of working, technical debt control Closely partner with the software and quality assurance engineers in the team through code reviews, knowledge sharing and mentoring Active collaboration with engineers in UK and US Active contribution to retrospectives, resolution of technical debt, and improvements to team and department working practices Periodic availability outside normal office hours for release support and deployment Working collaboratively along the whole SDLC – with colleagues in the team, solution designers, release team, support and the business to refine, release and run the software solutions What you’ll bring You will have the ability to build secure, clean and testable Java-based distributed applications in a Linux development environment You will have a firm grasp of relational database concepts (e.g. Oracle), appreciation of architecture and knowledge of industry design patterns You will have a dynamic can-do attitude, with the ability to work collaboratively within a team to drive continuous improvement and being able to prioritise under pressure You will take pride in your work and encourage others to do the same Experience with large code bases and version control systems Experience with Linux as a development and production environment Skills in the following areas are considered essential:  Java HTML CSS JavaScript REST APIs Spring Boot JBoss J2EE, JSP, Servlets, etc. Gradle or Maven Databases (Oracle) DDL and SQL Basic Networking Git & GitHub Linux (bash, ksh, ssh, etc.) Experience in the following areas would be nice to have: C/C++ Payment technologies (APACS, IFSF, Google Pay etc.) Exposure to Angular, AlpineJS, Bootstrap Database tools: Toad, DBeaver, SQL Developer IDEs: VS Code, Eclipse, etc. Typescript TLS, PKI – certs etc.  Keyfactor, Sectigo. Apache config Containers (Docker, Podman, etc) Testing tools: Selenium, JUnit Data formats: XML, JSON, YAML AWS, Azure, Cloud etc. Login Authentication (SSO, MFA) CI/CD Pipelines Security scans, Snyk, Checkmarx, etc. It’s a bonus if you have knowledge of the following: A keen interest in innovation, using techniques like BDD, best-of-breed software engineering practices and tools, with an ability to communicate clearly their advantages with your peers, stakeholders and end users A keen interest in AI and ability to use any AI tool in your day-to-day job Some familiarity with agile frameworks and methodologies (Scrum, Kanban, SAFe), and knowledge of their various advantages and pitfalls Any experience of working in a global online business/knowledge of cryptography and secure inter-application communication principles/high availability, high capacity, mission-critical systems, etc. About the team You will join one of our cross-functional teams containing developers, testers, scrum master, product owners and analysts. Each team has its own territory and backlog which it owns from kick-off to post-live. The teams follow agile practices which may be Scrum, Kanban or SAFe, adapted according to need. We integrate and deliver continuously, and so keep the feedback loop between product, development, test and end-users tight and responsive. We target fast feature development on our best-of-breed global payments platform. What makes a Globalpayer? Globalpayers think like a client, act like an owner and win as one team. We’re curious and innovative – always finding better ways to deliver impact. We empower each other to make decisions, and it’s our passion that drives excellence in everything we set out to do. Does this sound like you? Then you sound like a Globalpayer. Apply now to take your career global.