Kvants
Quant investing — web app and mobile
Fintech
Fintech product design and development, built to be trusted.
Investing, trading, lending and payments — web and mobile products where the numbers have to be right and the user has to feel safe. Designed and built by the person you talk to.
01Who it’s for
Built with the people who answer for the launch.
Founders
You’re taking a financial product to market and the date is set. You need one senior who designs it and ships it, end to end.
Product leads
Activation stalls between sign-up and the first deposit. You need the flow redesigned without stopping the roadmap.
Technical leads
You need a stack your team will know, access kept tight, and tests on every change — not a codebase to rescue later.
02What gets in the way
Where products like this lose people.
- 01
Hedge-fund maths, retail nerves.
Strategies built by professionals, money put in by everyday investors. Each number has to answer one question, in words they already use.
- 02
A failed payment is a lost customer.
A declined card, an expired session, a rejected transaction: every failure needs a way back, or the user doesn’t come back.
- 03
Big numbers, a wary audience.
High yields and easy loans invite suspicion. The offer and its proof have to stand on the same screen.
03What we build
What we build in fintech.
Investing & trading
Strategies, portfolios and performance for people who aren’t traders — through their exchange account or on-chain.
- Strategy market
- Portfolio
- Exchange accounts over API
- Performance
In the workKvants
Lending & staking
Loans against crypto and real assets, staking and yield — with the terms and the checks told apart before anyone applies.
- Loans & collateral
- Staking & yield
- KYC paths
In the workGTT
Fractional investing
Shares of real assets bought from a dashboard: what you own, what it earns, and every transaction in one place.
- Buy flow
- Transactions
- Activity
- Account security
In the workPropichain · DeRent
Plans, payments & checkout
Subscriptions and checkouts that answer the worries first: what’s charged, when, and how to pay — by card or with a token.
- Plans & tiers
- Card or token
- Checkout
- Email templates
In the workKvantsMerch Karma
05How it runs
One person on every call, checks on every change.
The same six stages on every project — and the tools this kind of product is built with.
01
Brief
02
Launch forecast
03
Design
04
Build
05
Checks
06
Launch
- Web products
- Next.js · React · TypeScript · Tailwind CSS
- Mobile
- React Native · Expo — iOS and Android from one codebase
- Back end & data
- Node.js · TypeScript · PostgreSQL
- Web3 front end
- wagmi · viem · WalletConnect
- Quality
- Playwright · Vitest · Lighthouse CI · axe · Slither
06The work
Products like yours, shipped.
Work by our founder, before Sublom
Propichain · DeRent
Tokenized real estate — landing and dashboard
GTT
Web3 lending and staking — presale landing
Next step
Let’s build it.
Tell us what you’re launching and when. You’ll talk to the person who builds it.
Replies within 1 business day