Junior Software Engineer jobs in United Kingdom

Founded by experienced entrepreneurs and engineers in 2016, Pismo is a technology company that provides a comprehensive processing platform for banking, card issuing and financial market infrastructure and helps customers innovate and build the next generation of banking and payment solutions. Pismo joined Visa in 2024.

Leveraging Visa’s solutions, our core platform, and an expanding suite of capabilities, Pismo addresses the technological challenges that large banks, marketplaces, and fintech companies face in migrating from legacy systems to more advanced technology in the market. Pismo’s cloud‑based platform empowers firms to build and launch financial products rapidly, scaling as they grow to have a broader audience while keeping high security and availability standards.

Pismo’s 500+ employees are located in more than 10 countries around the world.

We’re looking for a curious and motivated Associate Backend Engineer to join our Operations UI team—an integral part of our Control‑Center platform. This team builds and maintains the tools that enable our customers to serve their own through day‑to‑day operations like viewing transactions, adjusting account balances, and managing cards. You’ll be supported by experienced engineers while gaining hands‑on experience in a global, cloud‑first fintech company that’s landing major clients and making a real impact.

• Write and maintain GraphQL endpoints that connect our UI to internal APIs, enabling key operational features.
• Collaborate with senior engineers and cross‑functional teams to design, build, and test backend services.
• Participate in pair programming, bug fixing, and design discussions to improve service reliability and performance.
• Learn and apply best practices in microservices architecture, cloud‑native development, and secure coding.
• Contribute to a platform used by global customers, with opportunities to explore new technologies and patterns.
• Grow your skills in a supportive environment with mentorship and exposure to large‑scale systems.

• Demonstrates foundational technical knowledge to understand backend requirements and service design.
• Applies standard development practices using Golang, GraphQL, REST, and AWS to build scalable services.
• Collaborates with team members to implement features, resolve bugs, and improve system performance.
• Participates in code reviews and testing to ensure quality and maintainability.
• Documents technical decisions and asks clarifying questions to ensure alignment with team goals.
• Engages in continuous learning and contributes to a culture of engineering excellence.

This is a hybrid position in London. A remote position does not require job duties be performed within proximity of a Visa office location. Remote positions may be required to be present at a Visa office with scheduled notice.

• Bachelor’s degree, OR 3+ years of relevant work experience
• Basic understanding of backend development principles and RESTful API design
• Exposure to or interest in working with Golang, GraphQL, and AWS
• Willingness to learn and apply debugging tools to resolve issues.
• Strong communication and collaboration skills. comfortable working in a team environment.

• Bachelor’s degree, OR 3+ years of relevant work experience
• Basic understanding of backend development principles and RESTful API design.
• Exposure to or interest in working with Golang, GraphQL, and AWS.
• Ability to write clean, maintainable code and apply secure coding practices.
• Willingness to learn and apply debugging tools to resolve issues.
• Bachelor’s degree in Computer Science, Software Engineering, or a related field.
• Ability to write clean, maintainable code and apply secure coding practices.
• Demonstrated interest in software development through coursework, projects, or internships.
• Ability to ask clarifying questions and document requirements for assigned components.
• Eagerness to participate in reviews and learn from feedback.
• Familiarity with microservices architecture and cloud‑native development.
• Experience with Git, CI/CD pipelines, or containerization tools like Docker.
• Exposure to telemetry or monitoring tools.
• Passion for learning and staying current with backend technologies.
• Strong communication and collaboration skills, comfortable working in a team environment.
• Demonstrated interest in software development through coursework, projects, or internships.
• Ability to ask clarifying questions and document requirements for assigned components.
• Eagerness to participate in code reviews and learn from feedback.

• Energy and Experience: A growth mindset and enthusiasm for backend development in cloud environments.
• Challenge the Status Quo: Willingness to ask questions, explore new ideas, and improve existing systems.
• Language Expertise: Exposure to or interest in Golang, GraphQL, and RESTful APIs.
• Builder: Ability to write clean, maintainable code and contribute to scalable backend services.
• Learner: Eager to learn microservices, AWS, and modern development practices.
• Partnership: Strong collaboration skills and openness to feedback in a team‑oriented environment.

Visa is an EEO Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.