Senior Frontend Software Engineer

Senior Frontend Software Engineer - AI Squad Join to apply for the Senior Frontend Software Engineer - AI Squad role at Spendesk Help transform Spendesk into an AI‑first spend management platform. As part of our new AI/Data squad, you’ll ship magical user experiences powered by LLMs — from smart supplier recommendations to autonomous workflows that reduce manual work for customers. You’ll work end‑to‑end with ML engineers, PMs, and designers, using AWS Bedrock to integrate best‑in‑class models and bring AI features to life in elegant, performant interfaces. This is a greenfield opportunity with real product impact and latitude to shape both UX and architecture. Pitch — Why this role matters Help transform Spendesk into an AI‑first spend management platform. As part of our new AI/Data squad, you’ll ship magical user experiences powered by LLMs — from smart supplier recommendations to autonomous workflows that reduce manual work for customers. You’ll work end‑to‑end with ML engineers, PMs, and designers, using AWS Bedrock to integrate best‑in‑class models and bring AI features to life in elegant, performant interfaces. This is a greenfield opportunity with real product impact and latitude to shape both UX and architecture. Role Overview We are looking for a talented Frontend Software Engineer to join our AI/Data squad and help shape the future of spend management with AI. As a Frontend Software Engineer, you will take ownership of both functional and technical topics. You will have the opportunity to work across the entire feature lifecycle, including specification, technical design, development, testing, documentation, and maintenance. Our stack TypeScript Node.js for backend and banking applications React on the frontend PostgreSQL for data storage; Redis, SQS, and Kafka for jobs and queues Terraform to define our infrastructure Kubernetes, Lambdas, and Step Functions to run our applications AWS as our cloud provider (including AWS Bedrock for LLM access) GitHub Actions for CI Key Responsibilities Develop and maintain AI systems and features, with a focus on intuitive, high‑quality user experiences. Lead the design and development of performant, accessible, and user‑friendly interfaces (React/TypeScript), including data‑rich flows and AI‑assisted UIs. Collaborate closely with ML Engineers to integrate models (via AWS Bedrock), define guardrails, and design human‑in‑the‑loop interactions and feedback capture. Write clean, maintainable, and well‑tested code; contribute to our design system and frontend architecture. Instrument features with analytics, tracing, and evaluations to measure quality (latency, accuracy, UX outcomes) and drive iteration. Contribute to the technical vision and drive the implementation of complex projects; propose and ship POCs, run experiments/A‑B tests, and iterate quickly. Improve engineering processes, tools, and systems to enhance productivity and scalability. Mentor and inspire fellow engineers; share best practices in performance, accessibility, and testing. How we work (AI/Data squad) AI‑first, product‑led: we prototype fast, test with real users, and iterate based on signal. “You build it, you run it”: squads own deployment, monitoring, and continuous improvements. Collaboration by default: work hand‑in‑hand with PM, Design, ML Engineering, and (when needed) Sales/CS to understand problems and validate outcomes. Pragmatic engineering: we value clear trade‑offs, delivering impact over perfection. What we’re looking for Fluency in written and spoken English (our business language) 2+ years of experience in software development (5+ years for Senior Engineer positions) Strong AI mindset Proven track record of delivering high‑quality, scalable AI products Ability to translate business and product concepts into technical solutions Enthusiasm for working in a fast‑paced environment, with a focus on continuous growth and craft mastery Strong customer‑centric mindset Alignment with Spendesk’s core values of empowering businesses to achieve more Nice‑to‑haves (not required) Experience building AI‑assisted UIs (prompting patterns, human‑in‑the‑loop design, guardrails) Familiarity with AWS Bedrock or other LLM platforms; understanding of LLM evaluation and observability Strong frontend performance and accessibility expertise; profiling real‑world React apps Experience with experimentation frameworks (A/B tests, feature flags) and analytics Working knowledge of Node.js services to collaborate effectively across the stack Example projects you might work on Accounting Assistant: Helps accountants collect receipts and context from end users Budget Forecaster: Predicts budget needs based on historical data and business plans Spend Data Agent: Provides budget owners with insights on budget performance and trends Location and ways of working We value regular in‑person collaboration. We’re primarily hiring in Paris or London (flexible hybrid). Outstanding remote candidates may be considered; this is not a remote‑first role. Hiring process HR Screening call Discussion with a Hiring Manager (Head of Engineering) Technical interview: live coding (and/or technical design depending on seniority) Final interview with leadership As we are an international team, please submit your application and CV in English. About Spendesk Spendesk is the AI‑powered spend management and procurement platform that transforms company spending. By simplifying procurement,