Full-Stack Engineer - Payments Platform + AI Tools (Hybrid)

Pentasia; Greater London; Hybrid; GBP 65,000 - 80,000; Full time

Job summary

Pentasia is seeking a Full-Stack Software Engineer in Central London on a hybrid basis. You will develop and enhance web, mobile and payments platforms, review code for production readiness, and help drive secure, scalable software with AI-assisted tooling.

The role reports to the CEO with daily direction from the Lead Engineer. You will ship features across UI and data layers, implement automated tests, and collaborate on API integrations while maintaining strong security practices.

Qualifications

• 4+ years’ experience delivering web applications in a live production environment.

Responsibilities

• Ship features end to end from UI through data layer for customer-facing and internal platforms.
• Participate in dual-approval releases: peer review of Lead Engineer's code and vice versa.
• Build automated tests and maintain technical docs.
• Develop and support integrations via APIs and webhooks.
• Cover Lead Engineer's responsibilities during leave or absence.
• Work with AI-assisted development tools and validate outputs.
• Adhere to PCI DSS secure development standards.

Skills

TypeScript

React/Next.js

Node.js

SQL

PostgreSQL

Tools

Git & CI/CD

Job description

Pentasia is seeking a Full-Stack Software Engineer in Central London on a hybrid basis. You will develop and enhance web, mobile and payments platforms, review code for production readiness, and help drive secure, scalable software with AI-assisted tooling.

The role reports to the CEO with daily direction from the Lead Engineer. You will ship features across UI and data layers, implement automated tests, and collaborate on API integrations while maintaining strong security practices.