Senior Full-Stack Engineer (multiple openings)

Location: Remote Reports to: Engineering Manager Department: Engineering Interview process: Application deadline: 27th September 2026Initial HR intro call: 5th - 14th October First stage interview w/ Engineering Manager & Pillar Lead: 19th - 30th OctoberPanel Interview & Technical Assessment: 2nd - 5th November (potential extension to 12th Nov) THE ROLES We are hiring three Senior Full-Stack Engineers to join our cross-functional team pillars (which include Commercial Optimization, Product Innovation, and Tech Scale). Please note that specific pillar placement is not guaranteed and may vary from time to time based on business needs. We are advertising broadly for full-stack developers, but are actively seeking candidates with distinct front-end or back-end specialisms to fulfill three specific profiles: Balanced Full-Stack Developer. Comfortable splitting impact 50/50 across C#/.NET and modern TypeScript / ReactBack-end focused Senior Developer. Deep C#/.NET and Azure SQL expertise with front-end awarenessFront-end focused Senior Developer. Strong Modern React/TypeScript specialization to lead UI architecture and frontend modernization while collaborating with backend systems. Migrating legacy patterns through TypeScript into component-driven React During the application review, we will evaluate your individual background against all three specialist tracks to find the best fit for your technical strengths. Key Responsibilities Technical depth and delivery. Deliver high-quality features across the full stack (or front-end/back-end focus areas). Make independent technical decisions, consider architectural knock-on effects, and write clean, thoroughly tested codeMigration and modernization. Help steer key initiatives—whether migrating C# services to .NET 8, optimizing Azure SQL performance, or converting legacy UI modules into scalable React componentsTechnical debt and architecture. Identify and raise technical debt, author technical proposals on complex tickets, and champion quality standardsPR reviews and mentorship. Provide constructive code reviews, pair with mid-level engineers, unblock colleagues proactively, and guide standard methodologiesCollaboration and strategic AI. Work closely with PMs, Designers, and Marketing to shape what gets built, not just how. Strategically utilize and critically evaluate AI tools to accelerate delivery without compromising quality Requirements REQUIRED Experience. Minimum 5 years of progressive, professional software development experienceTechnical core:Strong proficiency in C# and the .NET ecosystem, ORStrong proficiency in React, TypeScript, HTML, and CSS (with web accessibility/WCAG experience for FE-focused candidates) Broad comfort working across the full stack and adapting to where team focus is required Data and cloud. Experience with relational databases (SQL Server / Azure SQL preferred)Engineering standards. Proven experience conducting thorough PR reviews, mentoring mid-level engineers, and working within Agile/SDLC frameworks Education. Bachelor's or Master's degree in Computer Science, Engineering, or equivalent practical experience Remote setup. Candidates must have an existing and suitable remote workstation setup NICE-TO-HAVES Experience with React component library design systems or component-driven migration Hands-on experience with Azure Ecosystem (App Services, Azure SQL, Azure DevOps) Experience with Entity Framework Core or backend performance optimization Familiarity with OpenTelemetry, front-end performance monitoring, or testing frameworks (Jest, React Testing Library, Playwright) Prior experience in the EdTech sector Benefits 30 days' holiday per year (inclusive of UK bank holidays)100% remote working Social events and annual meet ups About Wordwall Wordwall empowers educators to create interactive, customisable teaching materials in minutes - turning static lessons into dynamic, student-centred learning experiences. With just a few simple inputs, teachers can generate a variety of gamified activities, from quizzes and flashcards to arcade-style challenges, making learning more engaging and effective. We're flipping the script on traditional educational publishing by putting powerful creation tools directly into teachers' hands. Our platform fuels a bottom-up content ecosystem - scalable, shareable, and deeply attuned to real classroom needs - powered by a global community of educators. With millions of active users, strong organic traction, and a product that's beloved by teachers worldwide, Wordwall is entering an exciting new chapter. We're focused on building upon an already great product and increasing our impact and reach in key markets like the U.S. and Europe, deepening engagement with our paid user base, and driving innovation through emerging technologies such as AI. We're a lean, mission-driven, remote team building for long-term impact - and we're looking for sharp, strategic technical thinkers to help us scale both our product and our purpose.