Charan Singh · Principal product designer
I design health and fitness products, and make the AI inside them trustworthy.
Ten years of product design, with Recovry and StepSetGo first below. I build and ship AI systems myself, and I train as a runner: 1500m Punjab state champion, 2023 and 2024. Watch the training
12 case studies, 2017–2026 · health and fitness work first
- Measured
- You can check it: a live link, a public artifact.
- Remembered
- True as far as I know, no longer checkable.
- Unknown
- I cannot say. Usually under NDA.
- 01AI healthcare, mobile and web
Recovry
2024 · Design lead, 8-month build
An AI post-op platform built to cut opioid dependency. I owned model choice, guardrails, FDA-compliant design and the clinical AI UX, end to end.
The adjustment
Prescription management and pain-based dosing decisions stayed out of the AI entirely, too subjective and too risky for a regulated product, so the assistant stayed advisory with a clinician always in the loop.
Evidence: Remembered
Read the case study - 02Fitness rewards app, iOS
StepSetGo
2022 · Contract product designer
A homepage redesign for StepSetGo's walk-to-earn app: cutting through information overload so a busy user could see her fitness progress and reward coins at a glance, then track it without hunting.
The adjustment
Designed for iOS only and dropped wearable sync entirely, because the persona was an iPhone user who could not connect a wearable, and testing the new flow fast mattered more than covering every device.
Evidence: Measured
Read the case study - 03Brand strategy and identity
Airveda
2022 · Research-led brand language
A research-led brand language for an air-quality company: archetype, voice, type and an accessible colour system.
The adjustment
Colour couldn't be chosen for brand feel alone. The same palette has to carry air-quality readings legibly, so accessibility set the constraints first and the identity worked inside them, rather than picking brand colours and checking contrast afterwards.
Evidence: Remembered
Read the case study - 04AI career platform, web
Careerflow
2024 - now · Design consultant, ongoing
An AI-native career platform: a resume builder, job tracker, mock interviews and a salary negotiation agent, unified across four apps under one design system.
The adjustment
A clean-slate design system wasn't realistic across four live apps with hundreds of existing Ant Design modals between them. Consolidated component by component instead of rewriting, trading a fully bespoke system for one every app could actually adopt.
Evidence: Remembered
Iten, Kenya First long run of the season
First long run back, after a 2023 injury layoff.
2025-06-07 · 20.02 km
- 05Creator platform, web
Lume
2025 · Product design & frontend build
A profile and collaboration platform that turns a creator's scattered proof into one page brands can act on.
The adjustment
Didn't touch the backend, that stayed the client's. Used Claude to build the frontend myself instead of handing it to an engineer, and did the design in Figma solo.
Evidence: Remembered
- 06Case management platform, web
ABMDI
2020-2021 · Solo product designer
An in-house platform for the American Board of Medicolegal Death Investigators: one place to store, manage and share death investigation cases across the US, built from a mood board up through a full design system.
The adjustment
Funding for the platform dried up roughly a year after launch and it never got the reach it deserved. I do not have full visibility into what happened after that, whether it has been picked back up or shelved for good.
Evidence: Unknown
- 07Meeting recording & collaboration, web
tl;dv
2021 · Co-lead product designer
A meeting-highlights workspace for tl;dv: turning long recordings into shareable snippets, built alongside a design language the team could scale on.
The adjustment
With only two of us, consistency could not depend on memory, so we spent time on the shared design language instead of more screens. Two of the eight screens I was given never made it into the case study.
Evidence: Measured
- 08Pet adoption & commerce, mobile
Petfinder
2020 · Product designer
An iOS and Android app matching people across the US with their next dog to adopt, then helping them care for it from day one.
The adjustment
The in-app store never got its own commerce-optimised treatment. Letting shopping pull the app toward standard retail patterns would have split it in two, so the store and support stayed inside the adoption-first visual language and gave up conversion conventions to stay one product.
Evidence: Measured
The track, Iten, Kenya Confusing GPS...so stopped using in between
2025-06-06 · 2.62 km
Before 2020
The rest of the board predates COVID. Different tools, different screens, smaller teams, and the screenshots show every year of it.
Kept for the decisions, not the pixels.
- 09Data science platform, web
Domino
2019 · Contract-to-hire product designer
Domino automates DevOps for data science. I redesigned how their teams track experiments, map project investment and manage every package and file in one place.
Evidence: Measured
- 10Telecom analytics platform (NDA)
Radar
2018 · Lead, data and design
A telecom analytics platform that turned cluttered server data into decisions people could act on.
Evidence: Unknown
- 11E-commerce, web and mobile
Icustommadeit
2017 · Lead product designer
On-demand custom commerce for the Indian market, designed end to end across web and mobile.
Evidence: Remembered
Before 2017
There is work before 2017 that has no case study here. Agency years, early product work, things I shipped and no longer hold the files for. I am not going to reconstruct them from memory to make this page longer.
An empty row is more honest than a reconstructed one.
- —Before the watch was running
Pay10
2017 · Founding team, growth marketing & business strategy
A flat-₹10, 90-minute hyperlocal delivery network for one Delhi neighbourhood, built and run by a three-person founding team two years before Blinkit existed.
Evidence: Remembered
AI-native, in practice
Designs AI products and builds with AI systems.
Model choice, guardrails and evals, not prompts pasted into a slide.
Designing the product
- Picks the model, then tunes itEvaluated ChatGPT against Google Bard for an FDA-track post-op assistant, then chose and tuned ChatGPT for concise patient guidance. A build-versus-tune call driven by the use case.Recovry · remembered
- Draws the line the model may not crossKept prescription management and pain-based dosing out of the AI entirely, too subjective and too risky for a regulated product. The assistant advises; a clinician always decides.Recovry · remembered
- Ships an agentic layer, not a chatbotDesigned the agentic layer that surfaces network issues and automates root-cause analysis, taking mean diagnosis from about two days to under fifteen minutes.Linkeye, under NDA · remembered
- Treats AI as the interfaceAn agent that negotiates a salary, a coach that is always present, an assistant that starts from a prompt instead of a blank template, made to feel like one product rather than five AI experiments stapled together.Careerflow · remembered
Building the thing
- Builds the pipeline himselfTelegram voice note to Whisper to Claude extraction to a deterministic check against the product catalogue, with the parsed order echoed back so reps self-correct.Riznar · measured
- Gates the model with tests and evals107 assertions run on every push to the billing path, and a 45-message eval of the real prompt scores any prompt change before it ships, because a model that is right most of the time is wrong on somebody's invoice.Riznar · measured
- Designs it, then builds itDesigned in Figma and built the production frontend solo with Claude instead of handing it to an engineer. The backend stayed the client's.Lume · measured
- This site is the methodFive design versions of this page, each built and then judged by a fresh model that saw only a screenshot, with the capture harness and the terrain bake committed next to the code.This repo, scripts/ · measured
Same output. Rising cost.
Ten years of work looks steady from outside and gets more expensive inside. The senior move is knowing what to give up to protect the rest, which is why every project above names what got cut rather than only what shipped.
Where a claim is no longer checkable, it says so. Half of any ten-year portfolio is unverifiable, and pretending otherwise is the quiet lie most of them tell.