Senior Software Engineer
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Senior Software Engineer
London, England, United Kingdom
What’s Exciting About the Role
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 & Libraries
- Backend frameworks such as Hapi.js
Architecture & Design
- Strong grounding in Clean Architecture and Domain‑Driven Design (DDD)
- Dependency Injection (e.g., InversifyJS)
- 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
Cloud & Infrastructure
- Hands‑on experience with AWS services such as EC2, S3, Secrets Manager, and CloudWatch
- Docker and Docker Compose
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
- Iframe‑based widget embedding
Additional Bonuses
- Fintech, payments, or e‑commerce domain experience
- Messaging systems such as Kafka, RabbitMQ, or Redis Pub/Sub
- Internationalization (i18n) systems
- 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.