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Senior Full Stack Engineer - Javascript - React - Vue - Angular - AI

Company:
InterCity Partners Ltd
Location:
Belfast, United Kingdom
Posted:
November 18, 2025
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Description:

Senior Full Stack Engineer - JavaScript - React or Vue or Angular - C# .NET - AI - LLM - GenAI - ML

As a Senior Full Stack Engineer, you'll join a small, high-impact team building AI-powered features for their products. You will be building systems that automate end-to-end workflows from document processing through to statutory filing to make a real impact on tens of thousands of our customers.

Working in a self-contained squad with the autonomy to make commercial and technical decisions without being weighed down by bureaucracy, you'll be responsible for architecting and building production-grade AI solutions that solve real problems for our users. As a senior member of the team, you'll set technical direction, mentor others, and drive quality across the full stack.

AI Integration & Development

Collaborate closely with the AI platform team to design and deliver compelling AI-first features and products

Integrate AI capabilities seamlessly into existing products, ensuring smooth user experiences

Build responsive, intuitive UI components that make complex AI functionality accessible to end users

Optimize AI service performance, cost, and reliability in production environments

Technical Leadership & Delivery

Architect and implement scalable, production-ready AI-powered applications from front-end to back-end

Design and build performant, secure back-end services that integrate with our AI platform

Create user-friendly front-end interfaces for AI features using modern JavaScript frameworks or C# and Blazor

Lead technical decision-making within your squad, balancing innovation with pragmatic delivery

Drive best practices in code quality, testing, security, and observability

Quality & Continuous Improvement

Write clean, maintainable, well-tested code with comprehensive documentation

Configure and maintain CI/CD pipelines with automated testing and deployment

Skills

Full stack software engineering experience building production applications for the web.

Proven production experience building software powered by LLMs/GenAI/ML models - not demos or prototypes, but real systems serving users

Strong full-stack capability with expertise in: Modern JavaScript frameworks (React, Vue, Angular, etc.) or Blazor for front-end development

C# .NET for back-end services

RESTful API design and implementation

HTML5, CSS3, and responsive design principles

Cloud platform experience with Azure, AWS, or GCP

Production systems mindset including observability, testing, security, and reliability

Agile delivery experience in fast-paced, iterative environments

Strong collaboration and communication skills working effectively with technical and product stakeholders

Architectural thinking - ability to design scalable systems and make strategic technical decisions

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