Senior Frontend Software Engineer - AI Squad

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

Python for building ML models and APIS (FastAPI) to serve predictive models

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

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, payment cards, expense management, invoice processing, and accounting automation, Spendesk sets the new standard for spending at work. Its single, intelligent solution makes efficient spending easy for employees and gives finance leaders the full visibility and control they need across all company spend, even in multi-entity structures. Trusted by thousands of companies, Spendesk supports over 200,000 users across brands such as SoundCloud, Gousto, SumUp, and Bloom \& Wild. With offices in the United Kingdom, France, Spain and Germany, Spendesk also puts community at the heart of its mission. For more information: www.spendesk.com/press About our people \& culture

We believe that people do their best work when they’re given the freedom to thrive and grow. That’s why liberation is at the core of everything we do. We empower Spendeskers to take ownership of their work, to navigate ambiguity, and seize every opportunity. Spendeskers come from all over the world (35+ countries and counting!) but we have plenty in common: we're bold, ever-curious, committed to kindness, and tackle every challenge with a positive mindset. About our benefits

Our culture is built on trust, empowerment, and growth — with benefits to match!

Flexible on-site and remote policy

Lunch 60% funded by Spendesk (Swile Card)

Alan Premium health insurance

A Gymlib pass to let off steam after a productive day at work

Access to Moka.care for emotional and mental health wellbeing

Latest Apple equipment

Great office snacks to fuel your day

A positive team to work with daily!

Diversity \& Inclusion

At Spendesk, we're committed to fostering an environment where all differences are encouraged, supported and celebrated. We're building our culture for everyone, with everyone. Our goal is to attract and build a diverse, equal and inclusive team, where everyone feels welcome and we truly embrace and encourage people from all backgrounds to apply. What success looks like in your first 90 days

You’ve shipped your first AI‑assisted UI in production and instrumented it with meaningful metrics.

You’ve partnered with ML Engineers to refine prompts/guardrails and improved UX based on real usage data.

You’ve contributed to our design system or frontend architecture with a performance or accessibility improvement.

You’ve helped scope and deliver a POC or experiment that informed the roadmap.