Principal Full Stack Engineer & Architecture Lead

Engineering, Product teams, and Data teams, to drive scalability, resilience, performance, and engineering excellence while remaining hands-on with development.This role would suit someone who enjoys solving complex technical challenges, mentoring engineers, and building modern distributed systems within a fast-moving product-led environment. Key ResponsibilitiesArchitecture & Technical LeadershipLead platform architecture and technical design decisionsDefine scalable, secure, and maintainable engineering standardsProvide technical leadership across frontend, backend, APIs, infrastructure, and integrationsDrive platform scalability, resilience, observability, and performancePartner with leadership teams to align technical strategy with business goalsAct as the senior technical authority for complex engineering decisionsHands-On EngineeringContribute directly to backend and frontend production codeBuild scalable applications using Node.js, TypeScript, React, and Next.jsDesign and develop

AWS serverless and event-driven systemsDevelop and optimise PostgreSQL databases and queriesSupport engineering teams with the delivery of complex technical initiativesCloud, DevOps & InfrastructureDesign and maintain CI/CD pipelines and deployment automationBuild Infrastructure as Code using Terraform or AWS CDKImprove engineering workflows, release processes, and platform reliabilityImplement best practices across monitoring, logging, security, testing, and resilienceEnsure systems remain secure, scalable, and compliant with GDPR and healthcare regulationsEngineering LeadershipMentor and support engineers across the organisationConduct code reviews and promote engineering best practicesHelp establish coding standards, testing frameworks, and operational excellenceFoster a collaborative, high-performing engineering cultureTechnology StackCloud & Infrastructure AWS (Lambda, API Gateway, EventBridge, SQS, Step Functions, S3, CloudWatch, RDS)Backend Node.js, TypeScriptFrontend React, Next.js, Tailwind CSSData & Architecture PostgreSQL, Serverless, Event-Driven MicroservicesDevOps & Observability Terraform / AWS CDK, CI/CD, Monitoring & Logging About YouWe are looking for a technically strong and commercially minded engineering leader with:10+ years of software engineering experienceProven experience operating at Principal Engineer, Staff Engineer, or Architecture Lead levelStrong AWS cloud and serverless architecture expertiseExcellent full-stack development experience across Node.js, TypeScript, React/Next.js, and PostgreSQLExperience leading technical direction across engineering teamsStrong understanding of distributed systems and event-driven architectureExperience designing scalable, secure, production-grade systemsA hands-on mindset with a passion for building high-quality technologyDesirable ExperienceLife Science or regulated industry experienceGDPR and data security knowledgeAI/ML integrations or personalisation systemsSaaS or startup experienceWhat's On Offer£80,000 - £90,000 salaryHybrid working (office 2-3 days per week)30 days holiday including bank holidaysPension contributionBirthday day offModern equipment providedTeam events and collaborative cultureOpportunity to shape a fast-scaling healthcare platform with genuine social impact

Principal Full Stack Engineer & Architecture LeadLondon (Hybrid)£80,000 - £90,000 + BenefitsCommand Recruitment is proud to be partnering with an ambitious and rapidly growing healthcare company that is transforming access to specialist healthcare services across the UK.This is a fantastic opportunity for an experienced Principal Engineer or Technical Architecture Lead to play a key role in shaping a modern, cloud-native healthcare platform that is making a genuine impact on people's lives.Our client is building one of the UK's most innovative healthcare service platforms and is seeking a hands-on technical leader who can combine strategic architecture with strong full-stack engineering expertise. The OpportunityAs Principal Full Stack Engineer & Architecture Lead, you will take ownership of platform architecture, engineering standards, cloud infrastructure, and technical delivery across the business.You'll work closely with senior leadership, including the CTO, Director of