Principal Engineer (Architecture & Platform)

As our Principal Engineer, you will provide technical leadership across the organisation, shaping architecture, engineering standards, and platform strategy while remaining actively involved in the design and development of our products. You will work closely with the Director of Engineering, Product, and engineering teams to ensure we continue to build scalable, secure, and maintainable solutions that support our growth.

This role is expected to remain hands-on, with approximately 40-60% of your time spent contributing directly to architecture, technical design, prototyping, and production code.

What You’ll Be Doing:

Technical Leadership & Architecture

• Lead architecture and technical design across the platform.
• Define scalable, secure, and maintainable engineering patterns, standards, and best practices.
• Provide architectural leadership across frontend, backend, APIs, infrastructure, data, and third-party integrations.
• Act as the senior technical authority for complex engineering decisions and architectural challenges.
• Influence technical direction across multiple engineering teams, ensuring consistency, quality, and alignment with platform strategy.
• Partner closely with the Director of Engineering to align technical strategy with product delivery and business objectives.
• Drive long-term platform scalability, resilience, performance, and operational excellence. Evaluate emerging technologies and identify opportunities for innovation and continuous improvement.
• Help shape and maintain the organisation’s technical roadmap.

Hands-On Engineering

• Contribute directly to production code across backend and frontend services.
• Design and develop scalable services using Node.js and TypeScript.
• Build modern frontend applications using React and Next.js.
• Develop and operate cloud-native AWS serverless solutions.
• Design, optimise, and maintain PostgreSQL data models and queries.
• Support engineering teams in breaking down and delivering complex technical initiatives.
• Lead by example through high-quality software design, coding standards, and engineering practices.

Engineering Excellence & Mentorship

• Mentor senior engineers and technical leads, helping raise technical capability across the organisation.
• Drive engineering excellence through coaching, design reviews, technical leadership, and knowledge sharing.
• Champion modern software engineering practices including CI/CD, observability, automated testing, infrastructure as code, and cloud-native architectures.
• Support the adoption of AI-assisted development practices where they provide meaningful value.
• Foster a culture of continuous learning, technical curiosity, and pragmatic decision-making.
• Encourage collaboration across engineering, product, and operational teams to deliver high quality outcomes., You’ll have the opportunity to influence the future direction of a platform that makes a meaningful difference to people’s lives. You’ll work alongside talented engineers, product specialists, and healthcare professionals while helping shape both the technology and engineering culture of a growing organisation.

Do you have experience in TypeScript?, * Significant experience building and scaling modern SaaS platforms.

• Strong expertise in Node.js, TypeScript, React, and modern web architectures.
• Deep understanding of software architecture, distributed systems, API design, and cloud native development.
• Experience designing and operating solutions on AWS.
• Strong knowledge of PostgreSQL and data modelling.
• Proven ability to influence technical direction across multiple teams.
• Excellent communication skills with the ability to explain complex technical concepts to both technical and non-technical audiences.
• A passion for mentoring engineers and helping teams succeed.

• Competitive salary
• Work hybrid in our Canary Wharf office 2-3 days per week
• 25 days holiday plus UK public holidays
• Team get-togethers
• A paid day off on your birthday
• Office equipment when you join plus £500 stipend to set up your home office
• Pension contribution
• Be part of one of the UK’s most ambitious HealthTech start-ups

Join Us at The Centre for ADHD Research and Excellence: Shaping the Future of Accessible Healthcare

At CARE ADHD, we’re revolutionising private healthcare by making ADHD assessments and treatment more affordable and accessible to those who need it. Our client-centred approach, combined with lean methodology and a focus on continuous improvement, drives our commitment to excellence. We embrace an innovative mindset, encouraging rapid learning and adaptation through our ‘fail fast’ ethos. With ambitious plans to become the largest ADHD service provider outside the NHS within the next five years, we are committed to pushing boundaries and fostering innovation.

Why Work With Us?

This is an opportunity to play a key technical leadership role in building a platform designed to improve the lives of people managing ADHD., At CARE ADHD, we’re revolutionising private healthcare by making ADHD assessments and treatment more affordable and accessible to those who need it. Our client-centred approach, combined with lean methodology and a focus on continuous improvement, drives our commitment to excellence. We embrace an innovative mindset, encouraging rapid learning and adaptation through our ‘fail fast’ ethos. With ambitious plans to become the largest ADHD service provider outside the NHS within the next five years, we are committed to pushing boundaries and fostering innovation.