Senior Frontend Developer

InfoSum is the world’s leading data collaboration platform, providing solutions to the world’s largest enterprises to allow collaboration across data sources and deliver richer customer experiences that prioritize consumer privacy. Our vision is to unlock data’s limitless potential, by enabling the world’s data to be connected but never shared. As a people-first organization, we can offer you the personal and professional flexibility needed to get the job done, grow with us, and help challenge the status quo. If you want to work with a business that encourages collaboration, and champions the idea that the sum is greater than its parts, then we want to hear from you.

Requirements

You will have a proven track record working on scalable web applications. You should have experience with designing, developing and maintaining web applications using the latest web technologies. Taking a very UX focused approach to building applications, our frontend practice ensures that InfoSum can deliver it’s desired experience to the user using more informed design decisions.

You’ve delivered numerous projects at scale, and are the person people turn to to help solve the most complex challenges. You enjoy mentoring others, and excel in both technical skills and strategic thinking. This role requires deep expertise in user management systems and hosting complex micro-frontend environments.

We are looking for people with a focus on delivering solutions for our customers, a genuine passion for problem solving, coding, and who enjoy being challenged. eligible to work in the UK without sponsorship, with either weekly or monthly visits to the Basingstoke office, depending on location.

The Ideal Candidate would have:

• 8+ years of experience in  JavaScript/TypeScript development, with a focus on React
• Acted as a technical authority on Frontend, leading discussions, and setting standards across the team.
• Developed and implemented user authentication, authorization flows, and other user management features.
• Collaborate with cross-functional teams (backend, UX/UI designers, product managers) to deliver new features and improvements.
• Debug, troubleshoot, and solve complex issues to ensure application performance, scalability, and security.
• Lead code reviews, mentored junior developers, and contributed to continuous process improvements.

An exceptional candidate would also have experience of:

• Experience in auth and security on the frontend (e.g., OAuth, SSO, CSRF, SRI hashing etc)
• Vite / React Testing Library / Cypress
• XState
• GraphQL
• Docker / Kubernetes / AWS
• Express.js / NEST.js
• Build Processes (Webpack/ Vite)
• Microservices experience would be advantageous

Benefits

As well as working as part of an amazing, engaging and collaborative team, we offer our staff a wide range of benefits to motivate them to be the best they can be! Here’s an overview of everything we offer right now!

You will receive:

• A competitive salary based on your experience and ability to perform in role
• 25 days annual leave (excluding bank holidays)
• 8% pension contribution
• Private health care via AXA
• Fantastic corporate discounts and mental wellbeing support via Perkbox, including a top of line EAP.
• Salary sacrifice schemes as well as the opportunity to receive share options.

We have fantastic offices in Basingstoke and London complete with a fully stocked fridge / snacks and catered lunches 2 times a week.

We also reward our teams with monthly socials, half day Fridays during the summer months of July and August, 3 extra days off during the Christmas holidays and a culture built on recognition, collaboration and success.