---
title: 'AI Engineer at Light'
canonical: 'https://feeny.ai/job/ai-engineer-light-london-bjyrydtfr9gq'
type: 'job'
last_seen: '2026-09-09'
---

# AI Engineer at Light

- **Company:** Light
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-10
- **Last confirmed live:** 2026-09-09
- **Apply:** https://jobs.ashbyhq.com/light-inc/d856711a-2a65-4d09-a2e7-d0b4719152c5/application

**Skills:** Kotlin, React, LLMs, AWS, Terraform, AI tooling, Fintech experience, Accounting concepts, Agents

> Light is seeking a Mid-level AI Engineer to build production-ready AI features across the full stack using Kotlin and React. The role involves developing LLM-based products, shipping early and often, and modernizing financial operations for global companies.

## Job description

Retire the ERP.

Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers - automated accounting, real-time reporting, and financial flows that move at the speed of the business.

We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don’t just use Light - they enjoy it.

We’re an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you’re excited to modernise how the world runs money - one workflow at a time - you’re in the right place.

Backed by world-class investors and advised by industry titans, we’re building category-defining products with the freedom to ship ambitiously and own outcomes. Come help us make Light the global default for next-gen finance.

This AI Engineer role

We're looking for builders who can take a customer problem from idea to production, wherever in the stack it lives. At Light, AI writes code and the bottleneck has shifted from writing to thinking, so we want engineers who work end-to-end and ship things that matter.

We are primarily hiring at senior-level for this role.

Your qualifications:

7-10 years of experience ideally, plus...

- You build things. Not prototypes, not demos. Working software in production, doing something real for real users. This is the non-negotiable.
- You're genuinely AI-native. You've changed the way you work because of AI tooling, not just added it to your workflow. You have an instinct for where it helps, where it misleads, and how to use it without losing ownership of the outcome.
- You've built with LLMs. You have hands-on experience building products or features on top of large language models. Agents are a bonus, but working knowledge of how LLMs behave in production is a must.
- You're comfortable across the stack. You don't need to be a specialist in everything, but you can't have a lane you refuse to leave. Our stack is Kotlin and React. If you're strong in one and curious about the rest, that works. If you need someone else to handle the other side of the feature, it doesn't.
- You care about the product. You think about the person on the other end. You notice when something feels clunky, even if it technically works. You have opinions about what good software feels like and you act on them.
- You ship early and often. Small batches. Learn. Go again. You're not precious about your work. You'd rather put something real in front of a customer than spend another week perfecting it in isolation.

Bonus points:

- Experience in fintech or systems where data integrity is non-negotiable
- Familiarity with accounting concepts: debits, credits, reconciliation
- Background in high-growth startups where everything was still being figured out

Our Tech Stack:

We build on AWS, with a Kotlin backend, a React frontend, and infrastructure managed in Terraform. It's a real production system that global finance teams depend on every day. You don't need to have used every piece of it. You do need to be comfortable in this kind of environment: real scale, real customers, real stakes.

The good stuff

In addition to being part of a great team and working in a really fun and innovative environment, we offer:

💸 A competitive salary + potential stock options 🏝 25 days of annual leave + public holidays in the country where you are based. 🥳 Regular socials and company off-sites 🚀 A huge opportunity for career growth as you'll help shape a market-defining product.

The famous last words

Working at Light means you're embarking on an exciting journey to reshape the future of multinational financial operations. Our cheat-code is that we've built something like this before - and are now doing it again, only better. Our goal is to make global finance effortless and empower companies to make informed decisions.

Join the rocket ship while it's taking off 🚀

## About Light

## Company Overview
- **One-liner**: Light provides an AI-native, multi-entity financial platform (ERP) that automates global accounting, AR, AP, expenses, and financial reporting for multinational technology companies.
- **Entity Type**: Private (Series A)
- **Headquarters**: Copenhagen, Denmark
- **Founded**: 2022
- **Founders**: Jonathan Sanders (CEO) and Filip Kozjak (CTO)

## Core Business
- **Primary industry/industries**: Financial Software / Enterprise Resource Planning (ERP) / Fintech
- **Target customers**: B2B, specifically multinational technology companies and businesses with complex multi-entity accounting needs.
- **Mission or purpose statement**: To build the Smart Financial Platform, redefining ERP by shipping fast, joyful features built for finance and revolutionizing the world’s largest and oldest software category. [light.inc](https://light.inc/careers)

## Products & Services
- **Light Platform (AI-Native Financial Platform)**: A unified SaaS platform that combines General Ledger, Accounts Receivable, Accounts Payable, expenses, bookkeeping, and financial reporting. It is built on a best-in-class in-memory HTAP database for instant reporting and is designed to scale to billions of transactions. Key features include immutable record keeping, AI-powered accounting (e.g., a "finance companion" for snapping receipts and answering policy questions), automated workflows, and multi-entity consolidation. [light.inc](https://light.inc/?ref_type=organic)

## Market Standing
- **Valuation/Market Cap**: Not publicly available.
- **Key Metric**: **Total Funding: $43 Million**. This includes a $13M Seed round (led by Atomico, June 2024) and a $30M Series A (led by Balderton Capital, October 2025). [linkedin.com](https://www.linkedin.com/company/uselightinc)
- **Notable Investors/Partners**: Atomico (Seed lead), Balderton Capital (Series A lead). The team is also crafted by engineers and designers from world-class companies like Spotify, X, AWS, Klarna, Google, and Shopify. [light.inc](https://light.inc/careers)
- **Growth Signals**: The company is in a "high-velocity go-to-market phase" with rapid customer onboarding. Headcount has grown **+175% year-over-year** (from ~22 to 61+ employees). The company is actively shipping features faster than ever and fielding many RFPs. [light.inc](https://light.inc/careers), [linkedin.com](https://www.linkedin.com/company/uselightinc)

## Competitive Advantages
- **AI-Native Architecture**: Unlike legacy ERP systems (e.g., NetSuite), Light is built from the ground up as an AI-first platform, enabling features like automated workflows, smart predictions, and a conversational finance assistant.
- **Performance at Scale**: Built on an in-memory HTAP (Hybrid Transactional/Analytical Processing) database, Light boasts sub-500ms response times for any transaction or report, even at billions of transactions, whereas competitors can take up to 100 seconds. [light.inc](https://light.inc/?ref_type=organic)
- **Immutable Ledger**: Uses an immutable ledger for perfect audit trails, a critical feature for compliance that traditional, editable databases lack. [light.inc](https://light.inc/?ref_type=organic)
- **Multi-Entity Focus**: Purpose-built to solve the extreme complexity of multinational accounting, eliminating the need for a "finance frankenstack" of multiple disconnected systems. [light.inc](https://light.inc/?ref_type=organic)

## Strategic Focus
- **Go-to-Market Velocity**: The company is aggressively scaling its sales, onboarding, and customer experience teams to capture market demand.
- **Product Velocity**: Shipping new features and improvements at a rapid pace, focusing on making the platform more intuitive and powerful.
- **Global Expansion**: With offices in London, Copenhagen, and New York, and a remote team across Europe and the Americas, Light is building a global presence to serve international customers. [light.inc](https://light.inc/careers)
- **Talent Acquisition**: Actively hiring across engineering, sales, implementation, and AI strategy to fuel its growth phase.

## Why Work Here
- **Culture**: The company values speed, simplicity, clarity, and joy. They emphasize a "joyful user experience" for both customers and employees.
- **Work Environment**: Offers a hybrid/office model with physical offices in London, Copenhagen, and New York. Employees typically work from physical offices. [builtin.com](https://builtin.com/company/light-lightinc)
- **Perks & Benefits**: Includes healthcare benefits (dental, health, vision), life insurance, 401(K) (US), generous parental leave, company equity, and free snacks/drinks. They also have quarterly team events ("Starsite") in iconic European cities. [builtin.com](https://builtin.com/company/light-lightinc), [light.inc](https://light.inc/careers)
- **Impact**: Opportunity to work on a "world-class" product redefining a massive, legacy software category (ERP) with a highly skilled team from top tech companies. The engineering culture is described as "crafting the AI-native financial platform" with a focus on speed and quality. [light.inc](https://light.inc/careers)

## Sources
1. [light.inc](https://light.inc/careers)
2. [builtin.com](https://builtin.com/company/light-lightinc)
3. [light.inc](https://light.inc/?ref_type=organic)
4. [linkedin.com](https://www.linkedin.com/company/uselightinc)
5. [builtinnyc.com](https://www.builtinnyc.com/company/light-lightinc)

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- [Country Executive](https://feeny.ai/job/country-executive-light-munich-e840b7gvk2m7) — Munich, Germany
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