Senior Fullstack C# / .NET Engineer

About Leadature

Leadature is a B2B event-technology platform that has operated since 2008, with Fortune 500 clients and a 17-year track record. We run on-site intelligence for live events: badge scanning, lead capture and retrieval, session and booth tracking, badge printing, RFID, AI enrichment, and post-event reporting. We serve both sides of an event – the organizer running the show and the exhibitors on the floor.

We are a small, senior, fully distributed team. Decisions are fast, and we work dynamically.

Why this role exists

Our platform works, and it delivers for enterprise clients and SMBs, and has done for years. Over time, it inherited a lot of per-client customisations; product direction is currently split across several owners, which means we build reactively and our roadmap is decided by whichever event is next.

We are deciding now how much of it to modernise and how much to rebuild. Whoever takes this role will be one of a small number of people who genuinely understand how the product works – and central to what we build next.

If you like inheriting a real system with real clients on it, and turning manual work into product, this is that job. If you want greenfield only, it isn't.

What you will do

Support our clients

Be the technical voice in client conversations, alongside customer success and sales

Own client technical issues end to end — troubleshooting, data exports, configuration questions — with a client waiting

Run and improve the enrichment delivery for client events

Support live events. Events do not respect office hours, and during a show you will be reachable and responsive

Travel to a small number of client events a year to see the product in the environment it runs in

Build and customise

Ship the customisations enterprise clients ask for, hands-on

Stand up client registration and event pages quickly – we are comfortable with AI-assisted development where it gets a working thing in front of a client faster

Look for the places where AI removes manual work altogether — our enrichment pipeline, badge data cleanup, and reporting are all still done by hand and should not be

Improve the enrichment pipeline, which we currently run largely by hand

Make the knowledge transferable

Document how the platform works – campaign structures, data models, integrations, exports

Replace tribal knowledge with automation, tooling and sane technical governance

Get us to a point where we can add engineers without a two-month ramp

Support clients directly

Be the technical voice in client conversations, alongside our customer success and sales team

Support live events. Events do not respect office hours, and during a show you will be reachable and responsive

Occasionally travel to client events to see the product in the environment it runs in

Your first 90 days

This is real work waiting, not an onboarding exercise.

Document the campaign architecture – how primary, lookup and vertical campaigns interconnect

Produce a field dictionary for our event data exports, so anyone can pull a clean file

Take ownership of our platform integrations and move them onto proper service accounts

Come back with a prioritised product roadmap and tell us what you would change first

What we are looking for

Must have

Strong .NET / C# engineering, and no fear of a legacy codebase. Our platform is an older ASP.NET application – you should be able to read it, ship into it, and say honestly what is load-bearing and what should be replaced

Fluent in a modern stack too, because that is where we are heading: current .NET (8 or later) with ASP.NET Core, Entity Framework Core, SQL Server or PostgreSQL, React with TypeScript, and containerised deploys with CI/CD. You don't need every one of these, but you should have built and shipped on a current stack recently – not only maintained an old one

Excellent written English, and comfort being in front of enterprise clients

Willingness to be available during live events, including outside normal hours

Genuine AI proficiency, not curiosity. You use coding assistants and agentic tools daily and have opinions about which ones earn their place. You have used LLMs on real data work

Self-direction. Nobody here will manage your calendar

Nice to have

Event technology, ticketing, registration, or conference-tech background. This is a genuine advantage, and we will weight it heavily

Experience with badge and registration APIs generally

Data work: reporting, enrichment, moving messy data between systems

Having built something with an LLM in the product itself, not just in your own workflow

Working setup

Fully remote. We work across US and European hours

Contract engagement to start, with scope for it to grow as the platform does

A few events a year might involve travel, fully covered

How we hire

Short screening call

Technical conversation with one of our senior engineers

Test task / a working session on a real problem from our backlog

Final conversation with our CEO