Senior Software Engineer - React

As a Senior Software Engineer - React at Xantura, you will play a critical role in developing our self-service analytics and data visualisation capabilities, significantly enhancing user experience across our advanced analytics platform, OneView. You'll help build innovative, scalable applications using React and Next.js, integrating seamlessly with OneView via REST APIs. You will be responsible for designing performant, server-rendered and statically optimised applications using Next.js, ensuring fast load times and scalable frontend architecture suitable for Azure-hosted, multi-tenant cloud environments. This role requires you to be a proactive self-starter who takes ownership of delivery, quality, and outcomes, operating within a structured engineering environment that values consistency, transparency, and continuous improvement. You will collaborate closely with our Product, Platform, Data Science, and Business Consulting teams to build intuitive, impactful user interfaces that empower public sector clients to harness data-driven insights effectively., Frontend Development & Technical Delivery

• Design, develop, and deploy responsive, interactive applications using React and Next.js
• Build server-side rendered (SSR), statically generated (SSG), and hybrid applications using Next.js
• Integrate applications with OneView's REST APIs and backend services
• Ensure application performance, scalability, and maintainability in an Azure cloud environment
• Optimise applications for speed, accessibility, and reliability in production

Collaboration & Agile Delivery

• Work within an Azure DevOps-driven delivery model, including backlog management, sprint planning, and tracking
• Collaborate with cross-functional teams in an agile framework
• Contribute to sprint ceremonies and deliver against agreed priorities
• Communicate effectively with stakeholders

Quality Assurance & Maintenance

• Follow and promote strong engineering discipline, including clear acceptance criteria and peer review
• Contribute to and maintain CI/CD pipelines using Azure DevOps
• Ensure code quality through structured peer reviews and adherence to agreed standards
• Write clean, well-structured, reusable code with appropriate documentation
• Conduct thorough testing and debugging
• Take ownership of delivery through to production
• Identify and resolve performance bottlenecks

• 5+ years of experience building frontend applications
• Strong proficiency in React and Next.js
• Understanding of SSR, SSG, and modern rendering strategies
• Strong JavaScript/TypeScript, HTML, and CSS skills
• Experience with Azure cloud environments
• Experience with Azure DevOps
• Experience with scalable SaaS applications
• Experience with REST APIs
• Understanding of performance optimization
• Experience working in agile teams
• Testing experience (Jest, RTL, Cypress)
• Understanding of CI/CD
• Awareness of security best practices
• Structured and disciplined approach to delivery

Bonus points if you have:

• Experience with Azure App Services or Static Web Apps
• Familiarity with Azure AD / Entra ID
• Experience with advanced Next.js features
• Backend knowledge (Node.js, Python, SQL Server)
• Public sector experience
• Accessibility (WCAG 2.1)

Location - This is a hybrid role based in our office in London (Borough). You would be expected to be able to work from the office at least 1-2 days per week.

About Xantura At Xantura, we're on a mission to reduce societal inequality by helping local authorities use data more effectively. Our AI-driven platform empowers frontline workers with the insights they need to prevent complex issues like homelessness or children being taken into care - before they happen. We make this possible by connecting siloed datasets, applying advanced machine learning to enrich the data, and using predictive analytics to identify those most at risk. Our platform then distills this into clear, actionable insights that help frontline staff intervene early and make a real difference., It's an exciting time to join Xantura. We're scaling quickly, bringing on new clients, strengthening our platform, and expanding into new areas. While we're a technology company at heart, our true focus is on improving lives - and we're looking for people who share that vision.