Say hello

Elias · Software engineer · London

How I work

I like taking an idea all the way through: deciding what’s worth making, shaping the design, building across the stack, and continuing to improve it after it ships. I work with others along the way.

Elias standing aboard a boat, with water and a rocky coastline behind him
Out on the water

Here’s what I’ve been up to: a few things I’ve built, some I’m working on, and a few I enjoy.

Selected work

01 / Featured work

A few things I’ve been building.

Threshold landing page showing rental affordability choices for London, Basel, and Zurich01

Product engineering · Data visualisation · 2026

Threshold

A rental calculator for London, Basel, and Zurich. It brings salary, moving costs, and local assumptions together so you can work out what a move might take.

  • Shareable URL state
  • Typed city configuration
  • Accessible visual reasoning
Built with
React 19 · TypeScript · Vite · React Router · React Map GL · MapLibre GL JS · URLSearchParams · Vitest
Read case study Open project View code
Argus Risk interface showing event-driven risk positions02

Event-driven systems

Argus Risk

A local simulator for a multi-currency risk platform. Follow simulated prices and trades through the system and into portfolio calculations.

Built with
.NET 8 · Kafka / Redpanda · PostgreSQL / Marten · SignalR · Next.js
Read case study View code
Flowtime focus timer interface03

Offline-first interaction

Flowtime

A focus timer that keeps accurate time when its browser tab is in the background. It saves your history on your device and asks what you want to do if you close the tab mid-session.

Built with
Next.js · TypeScript · localStorage · Service Worker · Vitest
Read case study Open project View code
View all work

02 / Outside work

Some of what I’m into lately.

Recent building

Live · past yearI’ve made 1054 contributions in the past year.
28 Sept 2025 – 27 Sept 2026Past 365 days
Sun
Mon
Tue
Wed
Thu
Fri
Sat

Scroll across the year. Focus a day and use the arrow keys to explore it.

· No contributions
LessMore
GitHubUpdated 27 Sept

Around here

London skyline from the Thames, with St Paul’s Cathedral and the City beyond
London · home base

Training

Typical weekMy weekly training plan
MonFull body
TueZone 2 run
WedFull body
ThuInterval run
FriFull body
SatZone 2 rowing machine
SunInterval assault bike
My weekly plan

Fantasy football

Live
Weekly matchupWeek 3
My team77.4points
Opponent46.0points
0–2 this season
SleeperUpdated 27 Sept

Books, films, music and history

A few things I’m into outside work.

GoodreadsCurrently readingDark Age001

Dark Age

The #1 New York Times bestselling author of Morning Star returns to the Red Rising universe with the thrilling sequel to Iron Gold. For a decade Darrow led a revolution against the corrupt color-coded Society. Now,…Updated 27 SeptView on Goodreads
LetterboxdMost recently watchedThe Invite002

The Invite

2026 · 4.0 out of 5Updated 27 SeptView on Letterboxd

Music · Spotify

My playlist

What I’m listening to

I add songs as I find them.Open playlist in Spotify

History

This week in history

Week of 21 September 2026
  1. On this day1897
    New York Sun 1834 LR
    Image: Defunct publishersCommonsPublic domain

    In response to a letter written by eight-year-old Virginia O'Hanlon, The New York Sun published an editorial by Francis Pharcellus Church stating, "Yes, Virginia, there is a Santa Claus".

    Read the record
  2. On this day1933
    Wrestling Sikeston, MO 1938 1
    Image: Russell LeeCommonsPublic domain

    Salvador Lutteroth establishes Mexican professional wrestling.

    Read the record
  3. On this day2003
    Artwork Galileo Io Jupiter
    Image: NASACommonsPublic domain

    The Galileo spacecraft is terminated by sending it into Jupiter's atmosphere.

    Read the record
View this week’s Wikimedia events

03 / Experiments

Things I’m trying out.

A few side projects and small experiments with how software feels to use.

01Warm illustrated portrait of the eccentric Professor Past

History experiment

Ask Professor Past

A first public version of Professor Past, an eccentric character for exploring questions about history.View source
02Aerial view of a football stadium and marked fieldFootball · Data · Prediction

Fantasy football models

I’m working on matchup views, rankings, and draft tools for my Sleeper league. I’m still deciding whether a prediction model belongs here.Read experiment note

The live matchup is on the homepage. Here, I try out ideas for the tools around it.

03Flowtime focus timer interface showing an idle sessionInteraction · Craft · Notes

Interface studies

Small tests of controls, motion, and the details that make a product easier to use.Read experiment note

Some ideas work better than others; I keep the notes either way.

04 / About

A bit about me.

I’m in London, where I work on high-performance pricing and risk systems. Outside work, I take my own product ideas from the first sketch through design and code, then keep improving them after they ship.

I want to make products that solve a recurring problem well enough to become part of someone’s day. I care about making them beautiful, easy to understand, and a pleasure to use.

Start a conversation
Elias Bennett smiling in a white dinner jacket
Off duty, approximately

Career path

My career so far.

I started in marketing and data, then moved into software. I still like figuring out what a product needs and helping to build it.
  1. 01

    Marketing Executive

    Optegra Eye Healthcare & Kensington Medical

    I worked with engineers to improve website performance. Core Web Vitals and split tests helped us decide what to fix first.

  2. 02

    Full Stack Software Engineer

    Joveen

    I moved from tracking site performance to changing the code, improving an ecommerce product built with React, MySQL, and Java/Spring Boot.

  3. 03

    Present

    Software Engineer working on pricing and risk systems

    BNP Paribas CIB

    High-Performance Computing

    I work on software that brings market data into pricing and risk calculations.

05 / Contact

Let’s talk.

Email me eliasthebennett@gmail.com