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Senior Backend Software Engineer

F5Consultants — United Kingdom · Posted ~22 hours ago

Senior Full-time Hybrid £120000 + share options + benefits

Skills

Node.js TypeScript AWS Kubernetes REST APIs Distributed systems Event-driven architecture CI/CD React Terraform EventBridge SQS

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Summary ✨ AI‑Generated

A senior backend engineering opportunity within a high-growth payments technology environment. You will shape cloud-native, distributed infrastructure at scale, building event-driven services, public APIs, automated delivery pipelines, and systems designed for high reliability and performance.

Highlights

High compensation with share options and benefits, flexible office policy, and the opportunity to shape scalable cloud-native infrastructure in a high-growth fintech environment.

Description

Senior Backend Software Engineer - FinTech £120,000 + Share Options & Benefits Flexible office policy | South London Tech Stack: Node.js · TypeScript · AWS · Kubernetes · REST APIs I'm partnering with a high-growth UK payments fintech that's fundamentally rethinking how merchants and consumers pay for goods and services. This isn't a company doing incremental work, they're building genuinely disruptive infrastructure at scale, and they're now bringing on multiple Senior Engineers to help define the next chapter of growth. The Engineering Environment A modern, cloud-native platform engineered for serious scale: Node.js, TypeScriptReact (frontend)AWS cloud infrastructureKubernetesTerraform (Infrastructure as Code) Architecture Highlights Event-driven, distributed systems (EventBridge, SQS)Public-facing REST APIsFully automated CI/CD pipelinesData science and ML-driven personalisationScalable B2B payments infrastructure The Role As a Senior Software Engineer, you'll be working be shaping architecture, not just implementing it: Lead the design and evolution of B2B APIs and payments infrastructureContribute to architectural decisions across distributed systemsPartner with Product and UX during discovery and solution designOwn features end-to-end, from concept through to productionMentor engineers and raise the bar on engineering standardsChampion best practices across testing, CI/CD, and security What They're Looking For 8+ years in software engineering, with at least 2 years in financial services (payments, banking, or wealth) or a high-volume transaction environment (eCommerce, gaming, betting, or streaming)Strong backend engineering experience with Node.js and TypeScriptA track record of building and maintaining public REST APIsSolid AWS experience (Terraform a plus; Kubernetes a strong bonus)Comfort working within distributed, event-driven architecturesA delivery-focused mindset as you take ownership and see things throughAt ease in fast-moving, scale-up environments where ambiguity is the norm