Senior Software Engineer London, England, United Kingdom

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 a London‑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 as Hapi.js, or alternatives including Express, Fastify, or NestJS
• Authentication and authorization using JWT and OAuth2
• Repository and modular design patterns
• Experience building maintainable, testable backend systems

APIs & Data

• Design and operation of RESTful APIs
• API versioning and request validation
• Advanced filtering using RSQL or equivalent
• Experience with MongoDB (modeling, indexing, performance tuning)
• Experience with Redis for caching or messaging
• Database migrations and schema evolution
• Hands‑on experience with AWS services such as EC2, S3, Secrets Manager, and CloudWatch
• Docker and Docker Compose
• Strong discipline with CI/CD pipelines and Git workflows

Testing & Quality

• Automated testing using Jest or Mocha/Chai/Sinon
• End‑to‑end testing with Cypress (optional)
• Strong focus on code quality, reliability, and maintainability

Preferred Skills and Experience

Payments & Security

• Experience integrating payment providers such as Stripe, PayPal, or Klarna
• Knowledge of authorization, capture, and refund flows
• Experience with 3D Secure
• Awareness of PCI‑DSS requirements and security best practices
• Understanding of checkout and transactional domain flows

Production Engineering

• Performance optimization and debugging in production systems
• Exposure to monitoring or APM 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 as Angular or React
• Familiarity with RxJS and state management (NgRx or Redux)
• Server‑side rendering with Pug templates
• HTML/CSS with SASS or PostCSS

Additional Bonuses

• Fintech, payments, or e‑commerce domain experience
• Messaging systems such as Kafka, RabbitMQ, or Redis Pub/Sub
• Puppeteer for 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.

Global Demographic Sets (Non US)

You are invited to voluntarily self‑identify the following personal data points. Verifone is an equal opportunity employer that is committed to diversity and inclusion. We are dedicated to providing unbiased and fair work opportunities to employees irrespective of their race, age, gender, religion, or ethnicity. As such, voluntarily providing this information helps the company generate the most accurate EEO data to ensure we are upholding these goals. Even if you wish to keep this data private, you have the opportunity to participate in our efforts by selecting our “Do not wish to answer” option in the fields below.

Submission of this information is voluntary and refusal to provide it will not subject you to any adverse treatment. The information is kept confidential and is only used in accordance with provisions of applicable laws, executive orders and regulations, including those that require information to be summarized and reported to the federal government for civil rights enforcement. When reported, data will not identify any specific individual.

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