.NET Developer

Avanti
Ec1A1Bb, EC1A 1BB, United Kingdom
Last month
£45,000 – £50,000 pa

Salary

£45,000 – £50,000 pa

Job Type
Permanent
Work Pattern
Full-time
Work Location
Hybrid
Seniority
Mid
Education
Degree
Posted
23 Apr 2026 (Last month)

Avanti is working with an exciting early-stage 5-person FinTech startup based in London that is about to launch its first product in the embedded finance space.

Their platform helps businesses unlock working capital through intelligent, AI-driven invoice financing solutions, integrated directly into existing financial workflows.

With their launch just around the corner, they are now looking for a Mid-Level FullStack Developer to join their growing team.

THE ROLE

This is not a typical developer role. You’ll be working across both technology and business operations, giving you a unique opportunity to understand how a fintech company is built from the ground up. Around 70-80% of your time will be focused on development, with the other 20-30% focused on working closely with the COO to understand the operational side of the business.

You’ll be responsible for:

  • Building and maintaining fullstack applications
  • Developing APIs and working with databases
  • Contributing to frontend and backend development
  • Supporting AI-driven features and data workflows
  • Debugging, testing, and improving system performance
  • Working closely with the business to help automate operational processes

TECH STACK

  • .NET (backend)
  • React (frontend)
  • MySQL
  • AWS
  • Python (AI and data models)

Experience Required

  • 3+ years of experience in software development
  • Strong .NET experience
  • Some front-end (React ideally) – however Angular/Vue is fine
  • Good understanding of software engineering fundamentals
  • Interested in working in a startup / Have startup experience
  • AWS exposure (similar cloud is fine)
  • Interested in AI

Desirable:

  • Previously worked in a start-up
  • Python experience (Data / AI)

Why Join?

  • Join a startup at launch stage
  • Work on AI-driven fintech products
  • Gain exposure beyond coding into real business operations
  • Fast-track your development with hands-on experience
  • High visibility and real impact from day one

Salary is up to £50,000 and you will be required on-site 4 days per week in Central London.

If interested then click Apply Now!!

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