Louis-Nicolas Longheval
Mobile & web engineer
Updated 7 August 2026
I build iOS apps and web apps, looking for the sweetness in every detail. What I am best at is the motion: a transition that lands where your thumb expects it, haptics timed to the frame, a list that tells you it has reached the end. Small things, and most of the difference between an app that works and one you enjoy opening.
Most of my time goes to Tandem, where a client and a developer follow the same project in one place. The rest goes to Yam's, a score sheet for the dice game.
I spent four months at Nightborn for my end-of-studies internship, on two client apps. Both already worked when I arrived, so my job was what comes after: the animations, the haptics, the launch screen, and the slow work of turning a functional app into one that feels good in the hand.
Based in Belgium. Get in touch.
Work
2026
Tandem
App & WebClients and developers follow the same project here. Briefs, feedback and delivery in one thread instead of scattered across email.
Expo · Next.js · Convex · Clerk
Yam's
AppYou roll real dice, the app keeps the sheet: players, bonuses, totals. Four languages, a home screen widget, and an App Clip so a guest can join without installing anything.
Expo
Diagnostic 4P
ClientA questionnaire for My#1Job. Students answer it and find out how ready they are for the job market, and what they are missing.
Next.js
2025
Logbook
App & WebA daily journal for students on placement. You write an entry, your supervisor sees the progress without having to ask for it. Started as a web app, now has an iOS companion.
Next.js · Supabase · Expo
Fridge
AppTracks what is in your kitchen and when it expires, then tells you what you can cook tonight. Shared with the household so nobody buys the same thing twice.
SwiftUI
2024
KYC Monitors
WebA management platform for a sports club and its instructors: contracts, schedules, equipment and announcements, with a separate side for the administrators.
Next.js · Firebase
Good Friends
AppSplit expenses with friends. Scan the receipt, the app reads the amounts off it, groups the transaction and hands everyone the IBAN to settle up.
SwiftUI · Firebase · AWS Textract
At Nightborn
Two client apps, during my end-of-studies internship.
Press Shop & More
AgencyA Belgian retail chain's product: mobile app, backend, back office. I worked on the app. Launch screen, animations, haptics, gestures.
Expo · Next.js
WedSVP
AgencySame job again, on the mobile side. Most of my time went to the animations and to making the app feel native rather than like a page in a shell.
Expo