Live Payments

• At least 5 years of proven experience in full-stack development. Advanced proficiency in JavaScript/TypeScript (ES6+), Node.js, React.js, Next.js, NestJS, or Golang. 
• Strong expertise in designing and integrating RESTful APIs and socket protocols, with sound backend architecture and applied security practices (authentication, authorisation, input validation, secrets handling). 
• Solid experience with relational databases (PostgreSQL, MySQL, SQL Server) and transactional data modelling, plus working experience with NoSQL databases such as MongoDB or DynamoDB.
• Practical understanding of timeouts, retries, circuit breakers, and idempotency; deep understanding of concurrency, asynchronous programming, and multithreading. 
• Hands-on experience building and running services on AWS (Lambda and similar), GCP, or Azure, provisioned through Infrastructure-as-Code (Terraform, CloudFormation, or equivalent).
• Proven hands-on use of agentic AI coding tools (Claude Code, Cursor Agent, GitHub Copilot, or equivalent), not limited to chat-based AI use; able to design prompts, workflows, and context strategies that get reliable output from coding agents. 
• Excellent communication with a strong command of English; demonstrated problem-solving, self-motivation, and effectiveness both independently and in a team.  

Desirable skills:

• Experience with payment gateways, fintech, or financial systems; knowledge of AS2805, ISO 8583, ISO 20022, or equivalent message formats; knowledge of PCI DSS or payment security standards. Not required; we will train the right engineer on the domain.
• Strong understanding of Service-Oriented Architecture (SOA) and microservices.
• Handling peak traffic, failover, and disaster recovery; rate limiting, throttling, and traffic shaping; performance profiling and optimisation.