Senior Full-Stack Engineer: AI-Driven, API-First Platform

IFS; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

IFS in London is seeking a seasoned software engineer to lead the design and rollout of scalable APIs and AI-enabled features across front-end and back-end. You will steer architectural decisions, uphold reliability, and drive DevOps practices within a lean shared service model.

The role demands strong full-stack capabilities (React and Go or similar) and a proven track record of delivering secure, observable production software.

Responsibilities

• Lead the design, architecture, and implementation of scalable APIs, services, and accessibility-first user interfaces
• Deliver AI-native features across front-end and back-end for carbon accounting, ESG data collection, and sustainability planning capabilities
• Drive the evolution of the platform into modular, event-driven, API-first components
• Provide technical direction and make sound engineering trade-offs around scalability, maintainability, performance, and product impact
• Own reliability and operational excellence, including telemetry, SLOs, error budgets, on-call rotations, incident response, and continuous service improvement
• Champion DevOps practices, including CI/CD, deployment automation, monitoring, and application-level operations
• Collaborate with Platform Engineers as part of a lean DevOps shared service model, while taking responsibility for application-level DevOps within the team
• Mentor engineers, promote engineering best practices, and help raise the technical bar across the team
• Champion code quality, documentation, automated testing, performance, security, and maintainability
• Take full ownership of the quality of deliverables, including test automation, continuous improvement, and production readiness
• Partner closely with Product Management, Design, AI, Platform Engineering, and other engineering teams on product discovery, technical trade-offs, and delivery
• Bring a product- and customer-led mindset to solving customer pain points with elegant, scalable engineering solutions
• Identify technical risks, performance bottlenecks, and opportunities to improve the platform architecture and engineering ways of working
• Strong experience in full stack software engineering, with proven capability across both front-end and back-end development, Solid experience with modern front-end technologies, particularly React or similar frameworks, Strong back-end engineering experience, ideally including GoLang or comparable general-purpose programming languages, Experience designing and building scalable APIs, services, and cloud-native applications, Strong understanding of DevOps practices, including CI/CD, deployment, monitoring, automation, and incident response, Experience delivering secure, observable, high-quality production software, Strong focus on code quality, automated testing, documentation, performance, and maintainability, Ability to lead technical design discussions and influence architectural decisions, Effective collaboration and communication skills across Product, Design, Platform, and Engineering teams, Ownership mindset, with accountability for outcomes from design through to production

Job description

IFS in London is seeking a seasoned software engineer to lead the design and rollout of scalable APIs and AI-enabled features across front-end and back-end. You will steer architectural decisions, uphold reliability, and drive DevOps practices within a lean shared service model.

The role demands strong full-stack capabilities (React and Go or similar) and a proven track record of delivering secure, observable production software.