Principal Full Stack Engineer & Architecture Lead

Principal Full Stack Engineer & Architecture Lead

London (Hybrid)

£80,000 - £90,000 + Benefits

Command 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 Opportunity

As 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 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 Responsibilities

Architecture & Technical Leadership

Lead platform architecture and technical design decisions
Define scalable, secure, and maintainable engineering standards
Provide technical leadership across frontend, backend, APIs, infrastructure, and integrations
Drive platform scalability, resilience, observability, and performance
Partner with leadership teams to align technical strategy with business goals
Act as the senior technical authority for complex engineering decisionsHands-On Engineering

Contribute directly to backend and frontend production code
Build scalable applications using Node.js, TypeScript, React, and Next.js
Design and develop AWS serverless and event-driven systems
Develop and optimise PostgreSQL databases and queries
Support engineering teams with the delivery of complex technical initiativesCloud, DevOps & Infrastructure

Design and maintain CI/CD pipelines and deployment automation
Build Infrastructure as Code using Terraform or AWS CDK
Improve engineering workflows, release processes, and platform reliability
Implement best practices across monitoring, logging, security, testing, and resilience
Ensure systems remain secure, scalable, and compliant with GDPR and healthcare regulationsEngineering Leadership

Mentor and support engineers across the organisation
Conduct code reviews and promote engineering best practices
Help establish coding standards, testing frameworks, and operational excellence
Foster a collaborative, high-performing engineering culture

Technology Stack

Cloud & Infrastructure
AWS (Lambda, API Gateway, EventBridge, SQS, Step Functions, S3, CloudWatch, RDS)

Backend
Node.js, TypeScript

Frontend
React, Next.js, Tailwind CSS

Data & Architecture
PostgreSQL, Serverless, Event-Driven Microservices

DevOps & Observability
Terraform / AWS CDK, CI/CD, Monitoring & Logging

About You

We are looking for a technically strong and commercially minded engineering leader with:

10+ years of software engineering experience
Proven experience operating at Principal Engineer, Staff Engineer, or Architecture Lead level
Strong AWS cloud and serverless architecture expertise
Excellent full-stack development experience across Node.js, TypeScript, React/Next.js, and PostgreSQL
Experience leading technical direction across engineering teams
Strong understanding of distributed systems and event-driven architecture
Experience designing scalable, secure, production-grade systems
A hands-on mindset with a passion for building high-quality technologyDesirable Experience

Life Science or regulated industry experience
GDPR and data security knowledge
AI/ML integrations or personalisation systems
SaaS or startup experienceWhat's On Offer

£80,000 - £90,000 salary
Hybrid working (office 2-3 days per week)
30 days holiday including bank holidays
Pension contribution
Birthday day off
Modern equipment provided
Team events and collaborative culture
Opportunity to shape a fast-scaling healthcare platform with genuine social impact
Only candidates based in UK and eligible to work in UK are allowed