I build pricing and risk engines at BNP Paribas, and products of my own.

In C# and Java, on CPU and GPU. I’ve won the bank’s digitisation competition and a Take Ownership award.

See my work ↓Say hello

Elias in a white tuxedo, smiling — Based in London

Work

History, then marketing, then code. Each move was towards the work I liked most.

Staff · 01Valid · present

BNP ParibasSoftware engineerJul 2025 – nowOnlyC# engineer on the team

I was nominated as an AI Champion, and the workflow I built is now used by several teams across the department.
With that workflow I integrated a pricer in a couple of days, a job that takes an experienced engineer about two weeks.

The BNP Paribas story →

Staff · 02Returned

JoveenFull stack software engineerAug 2024 – Jun 2025−40%page loadThe Joveen story →

Staff · 03Returned

OptegraMarketing executiveSep 2021 – Aug 202488%Core Web Vitals pass rateThe Optegra story →

Before 2021 · History at uni · Because I loved it, and I still do.

Staff passSelf-issued

Where I’m headed

I want to be really good at this. Here’s what that means to me, and how far I’ve got.

Judgement
Knowing what’s worth building.
So far · OptegraAt Optegra, split tests and dashboards guided what the engineers built next.
The Optegra story →
Depth
Knowing why it works, not just that it does.
So far · BNP ParibasSix months from zero C# to production code, in a pricing engine of around 70 projects.
The BNP Paribas story →
Range
The whole way, from idea to running in production.
So far · ThresholdThreshold, from 57 user stories to a live site.
The Threshold case study →

Issued by: Elias Bennett

Things I make

06 things I’ve built · 03 I’m proudest of

I build everyday software, and make complicated things feel simple.

I take ideas all the way through: deciding what’s worth making, designing it, building it across the stack, and finding out whether it actually works.

Everything I’ve built (06) →

How I work

Three habits, and where I picked them up.

Start from a real problem.
Threshold started because my friends had no clear idea what renting would cost by area. Flowtime started because Pomodoro kept cutting me off mid-flow.
Write it down first.
Before I build, I write down the problem, who it’s for, and what’s out of scope. Threshold had 57 user stories before any code.
Measure whether it works.
I learned this in marketing, running split tests and conversion dashboards. At BNP Paribas I co-built a dashboard from users’ requirements that cut a 30–40 minute data load to under 5.