Senior Software Engineer

The Opportunity Join Attest at a pivotal moment: we're transforming how the world's leading brands discover and act on consumer insights. As a Senior Software Engineer on the Measure squad, you'll help grow and evolve Attest Measure, our quantitative survey platform that gives brands robust, at-scale consumer research — from survey design and fielding through to dynamic analysis and storytelling. Measure's remit spans the full research journey, including how Compass, our AI co-pilot, supports survey creation and analysis within Measure. Attest powers insights for brands like Netflix, Unilever, Nestle, and Reddit, connecting them to 150+ million consumers across 59 countries. As a Senior Software Engineer on the Measure squad, you'll work on complex challenges spanning frontend engineering, backend services, and data visualisation, shaping how leading brands make faster and more confident decisions. This isn't just about shipping features. You'll shape technical direction within your squad, contribute scalable patterns across the stack, and mentor engineers while working cross-functionally with Product, Design, and Data Science. This is a full stack role with a leaning towards frontend. Our frontend stack includes VueJS, TypeScript, and OpenAPI; our backend stack is primarily Java (Spring Boot) and Python, with some legacy Go. We're constantly evolving how we build and deliver software, and we're increasingly looking for engineers who work in an AI-native way. What this means to us is using AI coding assistants and agentic workflows as part of their everyday development practice. We're looking for an engineer with strong product instincts who enjoys collaborative problem-solving and values delivering meaningful impact over perfection. If you're motivated by building thoughtful user experiences and improving systems over time, we'd love to hear from you. Salary We are able to offer between £85,000-£95,000 depending on experience, with equity options and comprehensive benefits. In-person and Remote Working Balance We work in a flexible hybrid model. Most squads collaborate in person around two days per week, with flexibility around which days work best. This helps us balance meaningful face-to-face collaboration with time for focused engineering work. What You'll Be Doing As a Senior Software Engineer, You Will Lead high-impact technical initiatives: Own the design and delivery of complex features across the Measure product, from survey creation and fielding to insights visualisation, spanning frontend and backend.Shape products from discovery to delivery: Partner closely with Product and Design during discovery, translating evolving requirements into pragmatic technical solutions that solve real user problems.Extend the Measure experience end-to-end: Create robust, scalable systems using VueJS and TypeScript on the frontend, and Java (Spring Boot) or Python services on the backend, that handle streaming responses, dynamic visualisations, and complex state management.Integrate seamlessly: Use OpenAPI contracts to build reliable integrations across survey-building, audience, and insights services — including where Compass (https://www.askattest.com/compass) powers AI-assisted survey creation and analysis — handling real-time data streams and failure states robustly.Balance speed with sustainability: Ship quickly while maintaining high code quality, performance, and testability. Proactively reduce technical debt and improve system health.Elevate the entire team: Provide thoughtful code reviews, mentor other engineers through pairing, and contribute to shared patterns and standards across the Engineering organisation.Drive measurable outcomes: Focus on user outcomes, not just output, using data to inform iteration and improvement.Work AI-natively: Use AI coding assistants and agentic tools as a core part of your day-to-day workflow to build faster without sacrificing quality. You'll have autonomy in technical decisions, support for growth, and the opportunity to influence how users interact with AI-powered survey creation and insights across the Measure product. What You'll Bring We're Looking For Someone Who Has strong commercial experience with VueJS (or equivalent) and TypeScript, and is comfortable working across backend services in Java (Spring Boot) and/or Python, building complex applications that scale.Can lead technical delivery of large features or epics end-to-end across the stack, with cross-functional squad collaboration.Works AI-natively, including using AI coding assistants and agentic tools as part of their everyday development practice.Demonstrates strong architectural thinking across component design, service design, state management, performance, and scalability.Is comfortable with ambiguity. You don’t wait for perfect briefs, when requirements are unclear, you’ll get to the bottom of them and propose the approach you think is right.Balances pragmatism with engineering quality.Brings a product mindset, focusing on user outcomes and business impact over technical elegance.Has a growth mindset, actively seeks feedback, challenges assumptions, and continuously improves both systems and ways of working.Has thrived in cross-functional product squads, balancing engineering, product, and design perspectives.Communicates effectively with technical and non-technical stakeholders, making complex decisions accessible and building alignment. Nice To Have Experience building conversational UIs or real-time streaming interfaces.Experience building with LLM-powered applications or AI product features. We value diverse experiences and perspectives, especially in this age of non-linear careers. We encourage you to apply even if you don't fit all the criteria above, especially if you're energised by embracing the future and building impactful AI-driven user experiences! Our benefits Work from anywhere up to 20 days a year25 days holiday per year plus additional festive days£240 yearly L&D budget, plus access to a larger budget for qualifications and coursesPrivate Medical Insurance1 day per quarter to do charity or community workEnhanced parental leave (18 weeks paid leave for Primary carer)Up to 12 weeks paid leave for premature births and neonatal carePaid leave for IVF and fertility treatment and pregnancy lossShare options and an additional bonus scheme We want to give everyone the opportunity to showcase their best selves during the interview process and beyond. Do let us know if there are any adjustments you'd like to make to ensure it's more inclusive – we're learning too, so we're more than happy to adapt and accommodate where possible. Unfortunately we cannot offer visa sponsorship at this time.