Ilya Mois

Senior Software Engineer · Remote or on-site in Tbilisi, Georgia (GMT+4)

job.offers@mois.pro · github.com/mois-ilya · linkedin.com/in/moisilya · Russian (native), English (professional)

Summary

I take an area whole and make it dependable for the people on the other side of it: at Tonkeeper that was the TonAPI developer console and the TypeScript SDK, mine alone for 21 months, plus the API schema and documentation developers built against; this year it is Diwy Split, a Telegram Mini App taken from idea to production.

Where a system can hold a guarantee, I would rather it did than rely on anyone’s attention — mine, a colleague’s or a model’s. So things that must agree are generated from one source instead of kept in step by hand, the states a thing can be in are catalogued instead of remembered, and what would otherwise be judged by eye is compared against a reference or scored. The same habit now goes into tooling for AI agents: skills that hand them freshness-checked documentation, and LLM pipelines that are measured and cost-capped.

Experience

Diwy Split — side project, shipped

Mar 2026 – Present · diwy.me · Telegram Mini App, live in beta · solo; no company or funding behind it

Photograph a restaurant receipt in a group chat; anyone in the chat taps what they ate, in their own language, and sees their share — nothing to install, no sign-up, no names to type.
LLM recognition in a single linear pass: each stage names its model and fallbacks behind a gateway, spend is capped per user and per day, and a receipt whose arithmetic fails goes to the user for review rather than to another model.
Built a benchmark before settling on that design: every test receipt has hand-checked ground truth, and each pipeline variant is scored against it. A second model with an arbiter caught nothing the single pass missed, so it was dropped.
Every request, including the WebSocket, carries Telegram’s signed init data, and a bill is visible only to the people in it. CI runs unit tests and screen snapshots across four device profiles on every change.

Tonkeeper — Software Engineer, Developer Platform & DX

Jun 2024 – Mar 2026 · Remote · TON Apps, the 23-person team behind Tonkeeper, a wallet with 12M+ MAU. Most of this work is public and linked below.

Developer console — sole developer for 21 months. Moved billing from TON to USDT without forcing existing users through a cutover, and replaced the MobX state layer with React Query to stop duplicate events and server requests.
Console product work — shipped webhook management and pricing, API tiers, billing history, the analytics query builder and airdrop tooling.
TypeScript SDK, ~16k weekly downloads — sole maintainer from mid-2024. Rebuilt its packages and generator to preserve int64 values as bigint, handle OpenAPI serialization edge cases, and emit one client for browsers and Node with a single runtime dependency.
API schema and integration docs — changed the parts generated clients exposed as ambiguous: integer and date formats, response types and operation grouping. Wrote guides on transaction tracking, data signing and hash normalization.
Wallet — shipped non-liquid staking flows, SSE-backed swap work and TON Connect fixes across web, desktop and extension; made third-party API failures recoverable instead of letting them crash the app.

Quintegro — Frontend Developer

Jul 2023 – May 2024 · Remote

Led development of the booking-change module for a reservation platform connecting hosts and guests.
Defined frontend–backend API contracts, generated TypeScript types from them and set up CI.

Minacu — Full Stack Engineer

Apr 2023 – Jul 2023 · Part-time, Remote

Built streaming speech-to-text over gRPC, text analysis through the OpenAI API and a Telegram integration through tdlib — Python and NestJS on the backend, Next.js on the frontend.

Upper Echelon Products — JavaScript Developer, then Technical Team Lead

Apr 2021 – Mar 2023 · Remote

Promoted to lead; took 3–5 engineers and 1–2 QA through about 11 releases and mentored five junior developers.
Built an Amazon Seller Central ingestion pipeline and moved the backend from a VPS to AWS with CI/CD. Standardised the frontend architecture and moved API documentation to Swagger.

Apptech — Software Engineer

Jul 2020 – Nov 2020 · Part-time, St Petersburg

Built push notifications and real-time messaging on Firebase for the second version of a messenger app.

GET Information Technology — Software Engineer

Mar 2018 – Feb 2020 · St Petersburg

Built Backbone/Marionette and ExtJS interfaces and the ColdFusion services that supplied their data.
Introduced ESLint and Babel, including tooling that tracked their rollout across the codebase.

Selected Open Source

TON Connect specification — clarified two places where compliant implementations could sign different messages for the same request: the address format in a sign-data response and appDomain encoding. Both changes are in the protocol specification.
Data signing — implemented SignData in @tonconnect/sdk, covering text, binary and TON cell payloads, and published a readable TypeScript reference implementation.
Wallet capabilities — added requiredFeatures and preferredFeatures to the SDK, so apps can declare what they need and incompatible wallets are filtered before connection.

Skills

Languages & frontend — TypeScript, JavaScript, Python; Go (reading and small fixes); React, Next.js, React Native
Backend & APIs — Node.js, Fastify, NestJS, PostgreSQL, OpenAPI, REST, gRPC, webhooks, event sourcing
Cloud & testing — Cloudflare Workers, Durable Objects, AWS, Docker, CI/CD; Vitest, fast-check, Testcontainers
Domains — developer platforms and SDKs · payments and billing · Telegram Mini Apps and bots · blockchain