AI Systems - Senior Software Engineer
Job description
Software Engineer on Ledgy's AI Systems team, building the AI foundations and product experiences behind the Ledgy Agent, its tools and skills, the MCP server, and shared platform capabilities for embedding AI safely.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Hybrid
- Languages
- English
What you'll do
- Design and build the system behind the in-app Ledgy Agent, including the tools, skills, context, and orchestration behind it and how it decides to handle each request
- Shape the Ledgy MCP server alongside the in-app agent so a capability built once works in both places, deciding what to expose and how to keep it safe
- Design and build the system used to measure the agent's quality and learn from how customers use it: evaluations, tracing, and feedback from real conversations
- Design foundations that let AI features be built once and reused everywhere, and let other teams add AI to their domains without compromising correctness
- Design how the agent and MCP run as usage grows: backend infrastructure, cost, and latency, and how to keep them reliable and observable
- Own real parts of the work and have a say in where the team invests
- Spend time with customers to see how administrators actually use the agent and use that to decide what to build next
- Mentor other engineers and help teams across Ledgy add AI to what they build
What we're looking for
- 5+ years of experience working as a Software Engineer, with strong TypeScript/Node fundamentals across back end and front end
- Built and shipped agentic or LLM-based software to production, such as an agent, an assistant, or a chat product, and been the one running it
- Debugged failures in real conversations and kept cost and latency in check as usage and models changed
- Designed the agent itself: tools and skills, context and prompt engineering, state, streaming, and the agent loop
- Know at least one agent framework or runtime well and can say where it works and where it doesn't
- Improve these systems with evidence: evals, regression sets, tracing, and feedback from real usage
- Keep up with what the foundation labs and the wider community are learning about building agents
- Take part in deciding what to build: read the data, talk to customers, and push for what matters most
Nice to have
- Hands-on experience building with LLMs
Your team
AI Systems
Develops Ledgy's AI foundations and product experiences, from AI agents and AI-assisted workflows to the platform capabilities that help other teams embed AI safely in their domains. The team works in a new and evolving product area, balancing rapid iteration with reliable execution, evaluation tooling, and responsible automation.
Benefits
- Flexible working hours
- 25 days of vacation
- Up to 40 days of remote work from outside your home country
- Generous yearly learning & development budget
- Competitive salary + benefits + equity
- Hybrid work model of 2 days in the office per week for candidates based in London
How to get hired
- 1Getting to know you (45 min): meet with someone from the people team
- 2Live Coding (60 min): an equity domain problem solved collaboratively using your preferred language and IDE; no AI allowed
- 3System Design (60 min): design an architecture for a problem from the Ledgy domain using a visual tool of your choice
- 4Behavioural (45 min): behavioural style questions using the STAR method, with a PM and EM
- 5Culture Interview: a 30-minute chat with one of the founders and your hiring manager about Ledgy's mission and values
- 6Offer
Apply
About Ledgy
Make Europe a powerhouse of entrepreneurship
Ledgy builds a modern, tech-driven equity management and financial reporting platform for private and public companies. Founded in Switzerland in 2017, it operates globally from offices in Zurich and London.
Mission
Make Europe a powerhouse of entrepreneurship by building a modern, tech-driven equity management and financial reporting platform for private and public companies.
Key facts
- 2017
- Switzerland
- Equity management and financial reporting software
- In 2026, we aim to be the leading provider for European IPOs and reporting for share-based payments
- New Enterprise Associates led our $22m Series B round in 2022
- Philip Chopin joined Sequoia's Luciana Lixandru on our board
- Operates globally from offices in Zurich and London
- International team from 26 different countries speaking 25 different languages
Partners & customers
What they value
- Humble
- Transparent
- Ambitious
- Impactful