Senior Software Engineer - React in London

Senior Software Engineer - React in London

London Full-Time 63000 - 77000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Develop innovative applications using React and Next.js for data visualisation.
  • Company: Join Xantura, a mission-driven tech company tackling society's big challenges.
  • Benefits: Enjoy competitive salary, flexible hours, remote work, and extensive health benefits.
  • Other info: Hybrid role with excellent career growth and training opportunities.
  • Why this job: Make a real impact by enhancing user experience on our advanced analytics platform.
  • Qualifications: 5+ years in frontend development with strong React and Next.js skills.

The predicted salary is between 63000 - 77000 £ per year.

Senior Software Engineer - React

Department

Platform Delivery

Employment Type

Permanent - Full Time

Location

  • London
  • Description

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, One View.

You’ll help build innovative, scalable applications using React and Next. js, integrating seamlessly with One View 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.

Key Responsibilities

  • 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 One View’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 Dev Ops-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 Dev Ops
  • 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

Skills, Knowledge & Expertise

We’d love to hear from you if you have

  • 5+ years of experience building frontend applications
  • Strong proficiency in React and Next. js
  • Understanding of SSR, SSG, and modern rendering strategies
  • Strong Java Script/Type Script, HTML, and CSS skills
  • Experience with Azure cloud environments
  • Experience with Azure Dev Ops
  • Experience with scalable Saa S 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.

  • Job Benefits
  • Competitive salary reviewed annually
  • Work for a passionate, mission-driven company solving society’s big problems
  • Work flexible hours around life commitments with a focus on delivering company value rather than hours worked
  • Ability to work remotely (excluding face-to-face Team Meetings and client meetings)
  • Training and development opportunities
  • 25 days annual leave (plus bank holidays)
  • Company pension
  • Private medical insurance
  • Generous enhanced parental leave policies
  • Cycle to work scheme
  • Flu Vaccinations
  • Eye Test and contribution towards Glasses for VDU use
  • Employee Assistance Programme
  • Mental health and wellbeing support
  • Remote GP access
  • Counselling/therapy
  • Physiotherapy
  • Medical second opinions
  • #J-18808-Ljbffr

Senior Software Engineer - React in London employer: Xantura

Xantura is an exceptional employer, offering a dynamic work environment in London where innovation meets public sector impact. As a Director of Platform, you will not only lead the strategic evolution of the OneView platform but also enjoy a flexible work culture that prioritises employee well-being and professional growth. With competitive salaries, comprehensive benefits, and a mission-driven focus on solving societal challenges, Xantura provides a rewarding opportunity for those looking to make a meaningful difference.

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Contact Details:

Xantura Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Software Engineer - React in London

Join Local Tech Meetups

Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Xantura or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!

Contribute to Open Source Projects

Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Xantura.

Tap into Online Developer Communities

Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Xantura.

Explore Job Boards Specifically for Tech Roles

Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Xantura that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!

We think you need these skills to ace Senior Software Engineer - React in London

React
Next.js
JavaScript
TypeScript
HTML
CSS
Azure Cloud Environments

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Xantura.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Xantura and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

How to prepare for a job interview at Xantura

Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Xantura uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.