Senior Software Engineer

This London based role sits at the core of Verifone's payments and checkout platform, where backend engineering directly impacts secure, high volume transactions used globally. You'll design and operate scalable, production critical systems that must perform reliably under real world load, evolving payment methods, and strict security requirements.

Job Description

We are seeking aLondon based Senior Software Engineer (Node.js / TypeScript)to build and operate backend services supporting payment, checkout, and transactional workflows. You will collaborate closely with Product, Frontend, Platform, and Infrastructure teams to deliver secure, scalable APIs in high throughput environments.

Required Skills and Experience Programming Languages

• TypeScript(version 3.x or higher)
• Node.js(version 16 or higher)
• Backend frameworks such asHapi.js, or alternatives includingExpress,Fastify, orNestJS
• Authentication and authorization usingJWTandOAuth2
• Repository and modular design patterns
• Experience building maintainable, testable backend systems

APIs & Data

• Design and operation ofRESTful APIs
• API versioning and request validation
• Advanced filtering usingRSQLor equivalent
• Experience withMongoDB(modeling, indexing, performance tuning)
• Experience withRedisfor caching or messaging
• Database migrations and schema evolution
• Hands on experience withAWSservices such as EC2, S3, Secrets Manager, and CloudWatch
• DockerandDocker Compose
• Strong discipline withCI/CD pipelinesandGit workflows

Testing & Quality

• Automated testing usingJestorMocha/Chai/Sinon
• End to end testing withCypress(optional)
• Strong focus on code quality, reliability, and maintainability

Preferred Skills and Experience Payments & Security

• Experience integrating payment providers such asStripe,PayPal, orKlarna
• Knowledge of authorization, capture, and refund flows
• Experience with3D Secure
• Awareness ofPCI DSSrequirements and security best practices
• Understanding of checkout and transactional domain flows

Production Engineering

• Performance optimization and debugging in production systems
• Exposure to monitoring orAPM tools(e.g., AppDynamics or similar)
• Experience operating high availability or fault tolerant systems
• Familiarity with fraud related considerations

Frontend & Platform Exposure

• Experience working alongside frontend frameworks such asAngularorReact
• Familiarity withRxJSand state management (NgRx or Redux)
• Server side rendering withPug templates
• HTML/CSS withSASSorPostCSS

Additional Bonuses

• Fintech, payments, or e commerce domain experience
• Messaging systems such asKafka,RabbitMQ, orRedis Pub/Sub
• Puppeteerfor PDF or receipt generation

Our Commitment

Verifone is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Verifone is also committed to compliance with all fair employment practices regarding citizenship and immigration status.

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