Fullstack Software Engineer - FinTech/HealthTech - TWE42522 | London, UK

twentyAI; London; On-site; GBP 55,000 - 75,000; Full time

Job summary

A well-funded startup in London is seeking a Fullstack Software Engineer to develop a financial intelligence platform for the healthcare sector. This role involves end-to-end delivery of projects, building scalable systems, and collaborating closely with product and technical teams. The ideal candidate will have strong skills in Node.js, TypeScript, and cloud-native tools, along with experience in fast-paced environments. Competitive salary and opportunities for growth are offered.

Qualifications

• Strong background in backend or fullstack software engineering.
• Experience with frameworks such as Next.js and Prisma is desirable.
• Familiarity with data workflows, automation, or AI-driven systems is a plus.

Responsibilities

• Own end-to-end delivery of technical projects, from scoping and design to implementation.
• Build reliable, scalable systems including third-party integrations and payment workflows.
• Balance speed of delivery with long-term scalability and maintainability.

Skills

Node.js

TypeScript

PostgreSQL

Serverless architecture

Clean code principles

Tools

AWS

Vercel

Supabase

Next.js

Prisma

Job description

Fullstack Software Engineer - FinTech/HealthTech - TWE42522

Fullstack Software Engineer - FinTech/HealthTech - TWE42522

twentyAI London, United Kingdom Apply now Posted 3 days ago Permanent $75k - $100k

Fullstack Software Engineer - FinTech/HealthTech - TWE42522

twentyAI London, United Kingdom Apply now

Fullstack Software Engineer - FinTech/HealthTech

Permanent | Competitive Salary + Equity | Seed-Stage Startup | AI, FinTech, Healthcare

We are currently representing a well-funded, early-stage startup that is redefining financial visibility in the healthcare sector. Backed by reputable investors and founded by experienced operators, the company is building the financial intelligence platform for an industry in urgent need of change.

They are looking to hire a Software Engineer to join their small but highly capable team in central London. This role involves working closely with the CTO to develop and scale high-impact systems and features.

This is an opportunity to shape both the product and technical architecture from the ground up and contribute to a business solving a complex and meaningful problem.

Key Responsibilities

• Own end-to-end delivery of technical projects, from scoping and design to implementation and deployment

• Build reliable, scalable systems including third-party integrations, payment workflows, and internal tooling

• Contribute to backend-heavy infrastructure in a serverless environment

• Work closely with product and commercial teams to ensure business alignment

• Apply clean code principles and help improve development practices and standards

• Balance speed of delivery with long-term scalability and maintainability

Ideal Candidate

• Strong background in backend or fullstack software engineering

• Proficient in Node.js, TypeScript, and PostgreSQL (or similar relational databases)

• Experience with frameworks such as Next.js and Prisma is desirable

• Comfortable working with modern cloud-native tools such as Vercel, Supabase, and AWS (KMS, Secrets Manager)

• Experience working in a fast-paced startup or small team environment

• Familiarity with data workflows, automation, or AI-driven systems is a plus

• Excellent communication skills and a collaborative mindset

twentyAI provides augmented intelligence enabled talent solutions across the UK, Europe and United States.People and technology are central to our ...

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