Senior Full Stack Engineer (Frontend)

🔒 Confidential Employer
Posted 6 May 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Software Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

JavaScript TypeScript React Python PostgreSQL AWS GCP Unit Testing

FULL DESCRIPTION

Senior Full Stack Engineer (Frontend)

Company: [Employer hidden — sign up to reveal] | Location: London NW1, UK | Schedule: Full time | Job Type: Permanent | Industry: Engineering

About Join Social Care

Born out of the UK's fastest-growing tech-enabled talent acquisition platform dedicated to the health and social care sector, we operate a suite of proprietary AI agents that interviews, compliance checks and proactively supports frontline workers in their critical roles. Our products are used by industry leaders in health and social care, and recruitment teams in other critical sectors suffering from inefficient volume recruitment. We are the best-in-class agentic AI provider for large frontline workforce, and the UK market leader in the health and social care sector. Our vision is to create digital humans to hire and run large frontline workforce, starting from health and social care. Joining us, you are contributing to making this vision a reality.

The Role

As a [Employer hidden — sign up to reveal] Senior Full Stack Engineer, you’ll help build and improve our AI agents. You’ll play a key role in developing scalable, user-focused AI solutions to turbo charge volume hiring in critical sectors. This is an individual contributor role, working directly with the CEO. This is an exciting opportunity to make a huge impact on solving the recruitment challenge for critical sectors with true agentic AI. You'll work with a supportive, experienced and entrepreneurial team on AI products that truly transform industries.

Responsibilities

  • Develop scalable, reusable, and high-performance backend features and APIs
  • Own the AI agent (from prompting, to QA, to bespoke implementation (integration, customization))
  • Build reliable systems and quick prototypes, leveraging low-code solutions and AI coding (Vercel, Supabase, Claude Code)
  • Write robust unit and integration tests
  • Improve the codebase’s architecture, reliability, and testability
  • Contribute to system design and technical discussions
  • Collaborate with product manager and other engineers
  • Support partner / client-side technical discussions when needed

What We’re Looking For

You are entrepreneurial, laser-focused on problem solving, and passionate about agentic AI. You are a strong communicator who is able to express their thoughts and ideas during meetings but also open to other points of view.

Hard Requirements

  • 5 - 8 years of experience in software engineering
  • Experience working as Founding Engineer, or early hires of successful startup / scaleups is a plus
  • Willing to be on-site in our London offices (Holborn, Camden) 3 days a week
  • Strong proficiency in JavaScript and TypeScript, React.js and Python
  • Experience building reliable systems and quick prototypes, leveraging low-code solutions and AI coding (Vercel, Supabase, Claude Code)
  • Experience building production-grade front and backend systems & APIs
  • Solid understanding of relational (MySQL, PostgreSQL) databases
  • Comfortable working across the full stack
  • Supporting your code by writing unit tests and integration tests
  • Experience with cloud platforms (AWS and GCP)
  • Familiarity with Infrastructure as Code (e.g. Terraform) is a plus
  • Working in agile environments

What We Offer

  • Flexible working arrangements (incl. 3 days onsite in office)
  • 25 days holiday + your birthday off on top of bank holidays
  • Competitive salary with share options from a fast-growing AI startup
  • Training and development for your role and future career development

Contact: [Employer hidden — sign up to reveal]

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