Senior Full Stack Engineer - Javascript (React, Vue, Angular) - AI (LLLM, GenAI, ML) C# .NET

Royal Leamington Spa; Royal Leamington Spa; On-site; GBP 50,000 - 70,000; Full time

Job summary

A technology company in Royal Leamington Spa is looking for a Senior Full Stack Engineer to join a high-impact team focused on building AI-powered features. The ideal candidate will have strong full-stack capabilities, experience with modern JavaScript frameworks, and be responsible for leading the development of scalable applications. This role is perfect for someone looking to make a significant impact in a collaborative environment.

Qualifications

• Experience building production applications for the web.
• Background in software powered by LLMs/GenAI/ML models.
• Strong capability in modern JavaScript frameworks or Blazor for front-end.

Responsibilities

• Build AI-powered features for products.
• Collaborate with the AI platform team.
• Architect and implement scalable applications.
• Drive best practices in code quality.

Skills

Full stack software engineering experience

Experience with LLMs/GenAI/ML

Modern JavaScript frameworks (React, Vue, Angular)

C# .NET

RESTful API design

HTML5, CSS3

Cloud platform experience (Azure, AWS, GCP)

Agile delivery experience

Collaboration and communication skills

Architectural thinking

Job 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