Fullstack Developer .NET/JS

Lorien; City Of London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading technology staffing firm in the City of London seeks a senior full‑stack developer for a 12-month contract. The role involves integrating AI tools into real-time applications for credit sales and trading. Candidates should have strong expertise in .NET, Typescript, and React, along with over 8 years in software development, preferably in an investment banking setting. This position requires excellent communication skills and a proactive attitude.

Qualifications

• At least 8 years software development experience in an investment bank environment.
• Expert in .NET development including .NET core.
• At least 2 years recent experience using Typescript, React and CSS.

Responsibilities

• Develop client and server-side components integrating AI LLM tools.
• Work collaboratively across teams to identify requirements.
• Participate in an agile based software development environment.

Skills

Software development experience

.NET development

Typescript

React

SQL database experience

Agile methodologies

Good communication skills

Problem-solving

Attention to detail

Education

Academic background in engineering, sciences or economics

Tools

Jira

Job description

12 MONTH CONTRACT – INSIDE IR35 – INVESTMENT BANK

Job Description

We are looking for a senior full‑stack developer to work transversally between teams to integrate AI LLM tools into a successful and well‑respected suite of real‑time secondary market applications used by credit sales, trading and management globally.

We are looking for a candidate with expert knowledge of .NET and JS Typescript/React, database/SQL experience, and with a track record of delivery on large scale real‑time distributed systems.

Knowledge of the Fixed Income business would be beneficial but not required.

Key Responsibilities

• Develop client and server‑side components that integrate emerging AI LLM tools into front office applications
• Work collaboratively across teams to identify requirements and deliver high quality solutions which bring together the respective strengths of each platform
• Participate in an agile based software development as part of a global development team

Required Skills

• At least 8 years software development experience in an investment bank environment or equivalent
• Expert in .NET development, including .NET core and server‑side development
• At least 2 years recent experience using Typescript, React and CSS with track record of delivery
• Exposure to Rx and Redux/state management frameworks
• Real‑time high throughput application development
• Strong understanding of relational databases and SQL
• Comfortable working in an Agile environment and experience working with Jira
• Good communication, both orally and in writing. Comfortable interacting with front office users
• Excellent knowledge of programming best practices, design patterns
• Good analytical skills; able to understand, formalise and explain complex problems
• Confident numeracy and solid academic background in engineering, sciences or economics
• Proactive – constantly seeking to improve and enhance the current environment
• Self‑Starter – comfortable working alone and as part of transversal teams
• Resilience and tenacity – able to work through problems and issues
• Attention to detail – ensuring a consistent look and feel for front end designs
• Well organised and delivery focused

Carbon60, Lorien & SRG – The Impellam Group STEM Portfolio are acting as an Employment Business in relation to this vacancy.