NET Developer
CV-LibraryEC2, Barbican, Greater LondonpermanentPosted: 23 April 2026
Apply NowAvanti 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
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