Lead Full-Stack Software Engineer

Want to take full ownership of tech strategy, build out the team, execute an ambitious product strategy, and enjoy a 4-day working week? Read on...

Lead Full-Stack Software Engineer

• Unrivalled technical autonomy and ownership
• £85,000-£125,000 base salary
• Significant EMI share options totalling up to 3% equity
• 4-day work week (Monday–Thursday) as standard
• 6 weeks annual leave plus UK bank holidays
• Contributory company pension scheme
• Hybrid working with 1-2 days per week in London

The opportunity

We are looking for an ambitious, product-minded Lead Full-Stack Engineer to take true end-to-end ownership of our technical ecosystem. In this role, you won’t be an isolated ticket-taker working on fractional sub-features.

Over the next two years, we are executing an ambitious product strategy. This is centred on both enhancing our existing, commercially successful psychometric assessment platform and designing, building, and launching three enterprise-grade products from the ground up.

Working directly with the founder as our core technical anchor, you will be an integral part of the business, translating this roadmap into production reality. Alongside this, you will ensure our existing platform remains robust, partner directly with enterprise clients, and help scale and nurture the engineering team.

About Neurosight

We stand at the intersection of neuroscience, psychometric testing, and business psychology. We are redefining what is possible in talent assessment through radical innovations in online behavioural and cognitive evaluation, partnering with enterprise employers to deliver transformative, data-driven hiring outcomes.

Following three years of deep R&D, we launched commercially in 2022 and are now the UK's fastest growing provider of psychometric assessments by a significant margin - our enterprise client roster speaks for itself. Our software is the engine driving this momentum, and as our client roster expands, we are seeking senior engineering talent to elevate our technical foundations and accelerate delivery.

Our journey and technical focus

Having completed a major architectural transformation over the last two years, our focus now centres on four core pillars:

1. Enterprise-grade robustness and scale. Architecting our platform for the rigorous demands of enterprise scale. You will ensure our platform delivers high availability, strict multi-tenant data isolation, and zero-compromise security and compliance to maintain absolute trust with our corporate partners.
2. Seamless enterprise integrations. Designing robust APIs, webhooks, and connector services that allow corporate clients to integrate our platform effortlessly into their existing HRIS, ATS, and identity systems.
3. Internal tooling and workflow automation. Building and optimising sophisticated internal dashboards, analytics tools, and automated pipelines that empower our non-technical teams to operate at maximum leverage.
4. Shaping and executing our ambitious product strategy: Building three new enterprise-grade products over the next few years, including growing the Engineering team to

The role and what you’ll own

• Full-stack execution and architecture: Lead feature delivery and technical decisions across our React frontend, NestJS backend, and Azure infrastructure.
• Engineering standards. Raise the bar for code quality, automated test coverage, system documentation, and maintainable architecture across the codebase.
• Team growth: Take responsibility for growing the engineering team, including determining the resource required to deliver against the product strategy, and nurturing talent to deliver against that roadmap.
• Product Strategy : Acting as the technical product engineering lead, operating with the CEO and COO to build out and execute an ambitious, multi-year product strategy and the launch of ambitious new enterprise-grade products.
• Enterprise integrations and client discovery: Join technical discovery and solution-architecture calls with enterprise clients. You’ll translate complex client requirements into robust APIs, webhooks, and connector services that integrate smoothly with their existing HRIS, ATS, and identity systems.
• Internal tooling and workflow automation: Spot operational friction across the business and proactively build the internal dashboards, analytics tools, and automated pipelines that allow our non-technical teams to operate at maximum leverage.

Teck Stack

• Application: TypeScript (React frontend, NestJS / Node.js backend)
• Data & Storage: PostgreSQL, Redis, Azure Table Storage
• Infrastructure & Cloud: Azure, Terraform, Docker, CircleCI

A note on our stack: Don’t worry if you don’t match every single tool listed above. We care far more about strong technical fundamentals, first-principles problem solving, and a deep understanding of how to architect reliable, enterprise-grade software than an exact keyword match.

What you’ll bring

• Deep full-stack proficiency. Strong, production-proven experience across modern TypeScript ecosystems (React and NestJS/Node.js), relational database design (PostgreSQL), and cloud infrastructure. You have shipped and maintained systems handling real-world enterprise scale.
• Product sense and autonomy. You think like a product owner, evaluating business impact, usability, and technical ROI before writing code. You thrive in fast-paced start-up environments where problems can be ambiguous, and you don’t wait for a rigid spec to take action.
• Client-facing presence and communication. The ability to communicate technical concepts with clarity, whether discussing data security and APIs with an enterprise client’s IT team or explaining architectural trade-offs to internal business teammates.
• AI-accelerated engineering. You actively incorporate modern AI coding agents and CLI workflows (such as Claude Code) into your day-to-day development to accelerate delivery, test coverage, and refactoring.

Nice to have

• Experience designing integrations with enterprise platforms
• Hands-on infrastructure-as-code experience with Terraform and Azure cloud services
• Familiarity with data security and compliance standards
• Experience in an early-stage B2B SaaS start-up
• Experience growing teams and mentoring other engineers

The wide salary band reflect our open-mindedness to different experience levels - you may be an ambitious Senior Engineer looking for a step-up, or an existing Lead Engineer looking for a fresh challenge.

This is a rare opportunity to join a fast-growing, financially stable start-up with highly ambitious product plans and make a real difference.