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Elias Bennett

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.

See my work ↓Say hello
Elias in a white tuxedo, smiling
Software engineer

Work

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

  1. Threshold

    A clearer view of what moving could cost.

    Product · Data visualisation · 2026

    Threshold landing page introducing the real cost of moving out

  2. Argus Risk

    Every number shows where it came from and how old it is.

    Event-driven systems · 2026

    Argus Risk dashboard showing portfolio value, profit and loss, exposure, and system status

  3. Flowtime

    Breaks that match how long you actually focused.

    Offline-first interaction · 2026

    Flowtime focus timer showing 00:00:00 and a Start Focus Session button
  1. Home SecretaryA household coordination prototype, built for my software engineering coursework.Prototype · 2026
  2. Risk Event TrackerA tested C# Web API for managing risk events.Systems · API · 2025
  3. Ask Professor PastHistory you can talk to. Version 1; I’m rebuilding it.AI product · 2025

All work (06) →

How I work

Three habits, and where I picked them up.

  1. 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.

  2. 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.

  3. 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.

People in their 20s and 30s make the decision to move out … without a clear, honest view of what it will actually cost.
Threshold’s PRD, 16 April 2026

Where I’ve been

History, then marketing, then code.

  1. Before 2021

    History at uni

    • Because I loved it, and I still do.

  2. Sep 2021 – Aug 2024

    Marketing Executive

    Optegra Eye Healthcare & Kensington Medical

    • The best part was working with the engineers who built our website.
    • The click: a friend loved his work so much that even a hectic week sounded exciting. I wanted that from mine. Early 2024
    • Started coding in my spare time, just to see. Early 2024

  3. Aug 2024 – Jun 2025

    Full Stack Software Engineer

    Joveen

    • Built and improved an e-commerce site across React, Java/Spring Boot and MySQL: refactoring components, lazy-loading assets and optimising database queries.
    • Implemented API endpoints, validation and tests, and fixed mobile layout and functionality issues with cross-browser testing.

  4. Jul 2025 – now

    Software Engineer

    BNP Paribas CIB

    • High-performance computing for pricing and risk systems. I build and ship C# equity and commodity market-data loaders, combining and validating data for pricing and risk simulations.
    • I integrate pricing code with quantitative developers and enable the same NUnit tests to run across CPU and GPU environments. As the team’s sole C# engineer, I own implementation and delivery.
    • Won the Early Careers digitisation competition. Nov 2025
    • Take Ownership award. Q1 2026
    • Nominated as an AI Champion in the risk division. Spring 2026

Off the clock

What my own time looks like this week.

Elias mid-run on a rainy street in central London
Out on a run, central London.

My training week

  1. Monday: Full-body gym
  2. Tuesday: Zone 2 run
  3. Wednesday: Full-body gym
  4. Thursday: Interval run
  5. Friday: Full-body gym
  6. Saturday: Zone 2, rower or bike
  7. Sunday: Assault bike intervals

Zone 2 means slow on purpose.

Poster for Kiss Kiss Bang Bang (2005)

Admit one

Last watched

Kiss Kiss Bang Bang 2005

Watched 9 October, rated 3.5 out of 5

Letterboxd

Odd but true, from this week in history

12 October

2 more oddities this week
Voskhod 1 capsule on display, 2016
Image: Andrew Gray · CC BY-SA 3.0

The Soviet Union launches the Voskhod 1 into Earth orbit as the first spacecraft with a multi-person crew, and the first flight without pressure suits.

12 October 1964

Read on Wikipedia

Now making

Rebuilding Professor Past from scratch.

v1 is on GitHub if you want to meet the professor.

Code

GitHub, the past year

1,497 contributions in the past year

Use the arrow keys to move between days.

Say hello ↗

Got an idea, a project, or just want to talk about building things? Email’s the best way to reach me.