Apexx

Senior Backend Software Engineer

Bengaluru, Remote. Posted a month ago

The role

This person will build and run core payment orchestration platform components including payment flows, routing, and connectors. They will also manage platform reliability, on-call rotations, and CI/CD processes.

What you will do

  • Own core payment flows end to end from design doc to production
  • Evolve routing and recovery logic
  • Build and maintain connectors to acquirers, APMs and BNPL providers
  • Design for correctness under failure
  • Protect cardholder data within tokenisation and vault services
  • Join the on-call rotation
  • Define and track SLOs and service dashboards
  • Write runbooks, lead incidents and blameless RCAs
  • Improve GitLab CI/CD and AWS estate
  • Write technical design docs, give code reviews, mentor engineers and help modernise the stack

Required qualifications

  • Significant experience building and running production backend services in Java and Spring Boot, or a comparable JVM or backend stack
  • Strong grasp of distributed-systems failure modes
  • Solid PostgreSQL skills
  • Practical use of Redis or similar caches
  • Hands-on AWS experience
  • Comfort with CI/CD, containers and infrastructure-as-code
  • Experience owning services in production including on-call, debugging, leading incidents and writing RCAs
  • Clear written communication
  • Productive and critical use of AI coding tools

Nice to have

  • Payments experience: card acquiring, 3DS2/SCA, network tokens, APMs/BNPL, settlement and reconciliation, or payment orchestration
  • Working knowledge of PCI DSS, HSMs and key management, or OAuth2/mTLS for partner integrations
  • Observability tooling, SLO-based alerting, or analytics stacks such as Snowflake or QuickSight
  • Experience in a Scale-up or Fintech working with UK or global teams

Benefits

  • Competitive compensation
  • Generous time off: annual leave, public holidays and wellbeing-focused time away from work
  • Work From Anywhere: up to 90 days a year from eligible locations
  • Comprehensive health insurance for you and your loved ones
  • Personal accident insurance
  • Enhanced family leave: enhanced parental and family-friendly leave policies
  • Learning & growth opportunities

Before you apply

  • Hiring process involves a talent screen, conversation with hiring manager, hands-on technical session and a system design session
  • Candidates can use AI tools in technical rounds
  • Every candidate receives a written feed-forward from the panel

About the company

APEXX is an independent, enterprise payment orchestration platform. It helps enterprise businesses simplify payments through a single, scalable integration.