Senior Full Stack Engineer

Our client is a forward thinking, ambitious infrastructure and managed services provider in London. We are looking for a Senior Full Stack Engineer to own end-to-end delivery of critical features, and lead the team to new heights. Salary £70k to £80k plus excellent benefits Role type Permanent Location London Our client is an infrastructure communications technology company providing end-to-end fibre solutions and now Cloud solutions, Wi-Fi, Firewalls/Security, SD WAN, Managed LAN and UC services for businesses and wholesale/carrier/channel organisations across London. What you will do: We are looking for a Senior Full Stack Engineer to own end-to-end delivery of critical features, drive architectural excellence, and establish best practices. You’ll work hands-on across React, Node.js, and Python services, own our CI/CD and DevOps processes, integrate with network-centric systems, and mentor the wider engineering team as we grow. Key responsibilities: Architect, build & implement scalable features in our React frontend and Node.js / Python backend (FastAPI, Celery) Design integrations with network devices, IPAM, monitoring platforms, Wi-Fi authentication systems, CRMs and partnered PropTech tools Continually hone and perfect our homegrown DevOps and CI/CD processes by further developing GitHub Actions pipelines, Terraform definitions and observability integrations. Ensure quality & reliability: establish testing best practices (unit, integration, end-to-end), conduct code reviews and demand high quality standards Shape and refine our cloud-native platform to optimise performance, security and scalability Mentor & lead intermediate developers, imparting knowledge and fostering a culture of clean code, peer review and shared ownership. Collaborate cross-functionally with product, operations and customer success to translate requirements into robust technical solutions. A good fit candidate will have: 5+ years hands-on as a full stack engineer in a SaaS environment Expert in React (hooks, state management, performance) Strong backend skills in Node.js (Express) and Python (FastAPI, Celery) Deep familiarity with Microsoft Azure (App Services, Functions, networking) Proven experience working with network-focused systems (SNMP, IPAM, CLI automation) Solid understanding of Auth0 (or similar OAuth/OIDC) and secure authentication flows. Skilled with GitHub and GitHub Actions for automated CI/CD. Experience with infrastructure as code (ARM templates, Terraform, Bicep). Comfortable writing and maintaining tests (unit, integration, e2e). Excellent communication, problem-solving skills and ability to thrive in a fast-paced startup. Background in network engineering or close collaboration with network operations teams. Experience building platform integrations and/or asynchronous automation systems. Open-source contributions in related domains. You’ve worked at an early-stage startup before and understand what “hands-on” really means. #J-18808-Ljbffr