Danila Igoshin — Senior Frontend Engineer · React & TypeScript Contractor

№ 01 — Selected engagements

Four engagements, nothing collapsed.

2020 — 2026
every claim in the open ↓

№ 01

An AI-assisted research platform for scientists

CurrentMorizo Digital · Feb 2026 — · React 19 + Monaco

nowcurrent engagement

\section{Results} We observe that \begin{equation} \int_{-\infty}^{\infty} e^{-x^2}\,dx = \sqrt{\pi} \end{equation}

Fig. 01 — LaTeX/Typst authoringset in type · client work

Situation: A research platform where scientists write and compile papers in the browser, with AI in the loop — the authoring experience is the product.
What I do: Monaco-based LaTeX/Typst authoring — autocomplete, shortcuts, auxiliary TeX files, save flows; compiled-PDF preview with source-to-error mapping; AI-chat UX with per-message model selection, reasoning blocks and token-usage labels; admin tooling and EN/RU localization.
Stack: React 19 · TypeScript · Vite · Zustand · Monaco · PDF.js · Yjs

Current — ask me about it

№ 02

A real-time support widget any product can embed

PrivateSmartway · Aug 2025 — Jan 2026 · Preact + WebSocket

+70%chat render · 1k+ msgs

Smartway support chat widget — admin panel with conversation list and ticket details — **Fig. 02 — Support widget + admin**Preact · WS

Situation: A corporate travel platform needed live support chat embedded in its product — plus the admin panel that routes tickets across flights, hotels, rail and transfers.
What I did: Owned the widget end to end: embeddable architecture with a public integration API, HMAC auth migrated without breaking existing integrations, WebSocket messaging, drag-and-drop uploads for 15+ file formats, ticket-routing redesign.
Result: Virtualized rendering made 1,000-message threads render 70% faster — long support histories scroll like native.
Stack: Preact · TypeScript · Vite · Redux Toolkit · WebSocket · OpenAPI codegen

Under NDA — I'll walk through it on a call

№ 03

A founder needed a product, not a team

Solo FESmart Online Institute · Feb — Aug 2025 · Next.js + BFF

5moempty repo → live MVP

Smart Online Institute — course marketplace with featured class and catalogue — **Fig. 03 — EdTech marketplace**Read the brief →

Situation: An EdTech startup with no frontend, a legacy service with no API, and an MVP that had to be live within months.
What I did: Sole frontend engineer, end to end: course marketplace, booking and scheduling with auto-generated video-call links, instructor admin with progress charts, secure media viewer over AWS S3, a BFF layer in Next.js, CI/CD and Docker deploys — and legacy-data migration automated with Playwright scraping.
Result: Empty repository to live MVP in five months — one engineer, the whole frontend.
Stack: Next.js · Tailwind · shadcn/ui · React Query · Zod · Strapi · Playwright

Read the engagement brief

№ 04

Kept a corporate travel platform fast while the team grew

Tech-leadSmartway · 2021 — 2024 · React + TS migration

10×faster builds · Vite

Smartway corporate travel platform — booking search, trip calendar and approval widgets — **Fig. 04 — Corporate travel platform**Read the case →

Situation: Three years on Smartway's web platform — flights, trains, taxis, transfers, hotels, approvals — as the codebase and the team both grew.
What I did: Led the full TypeScript migration (including a custom UI library) within a year; replaced Webpack with Vite; restructured the booking cart's state and rendering; built the analytics module; ran tech talks and mentored three developers as tech-lead.
Result: Builds 10× faster, booking cart +300%, a fully typed codebase new hires can navigate — and the team stopped waiting on tooling.
Stack: React · Redux · MobX · React Query · Next.js · TypeScript · Vite

Read the case study

Earlier — 2020Germo-S: a complete B2B industrial store — storefront, search, cart, order management, custom CMS — built and shipped alone on Nuxt, Express and MongoDB.

№ 02 — Terms of engagement

Two ways to hire me.

contract-first · EMEA
how it starts, below

By contract

A

Performance rescue 2 – 6 weeks · fixed scope

Your product is slow and everyone's used to it. Profiling, Core Web Vitals, render and build performance — you get a before/after report your team can verify. A good first engagement.

A migration that doesn't stop the roadmap scoped per codebase

JS → TypeScript, Webpack → Vite, legacy → Next.js. Done alongside feature work — the team keeps shipping while the ground moves.

MVP build-out 3 – 6 months · solo

A product surface or a full MVP owned end to end, zero to live. One engineer, no coordination tax — see the EdTech brief for the record.

Embedded senior 3 – 6 months

Your team, your process, my ownership — architecture, complex features, AI-enabled product UX, mentoring along the way.

Remote·full EU overlap (UTC+3)·EN/RU·B2B invoicing

Contract inquiry

Full-time

B

A senior seat on a complex product remote · relocation

Performance, frontend platform or product engineering on a genuinely complex React product — dashboards, editors, AI-enabled workflows. EMEA, remote or relocation.

What you get on day one

Six years of production scar tissue: a full TypeScript migration shipped without stopping the roadmap, performance budgets that held, three developers mentored — and documentation written before anyone asks.

The long game·quality & ownership·EMEA

Senior frontend role

The first thirty days, itemized.

as run on rescue & embedded engagements

Days 1 – 5 A findings memo: where the product is slow, in user-seconds and developer-hours.

Days 6 – 15 One measured fix shipped to production — before/after traces included.

Days 16 – 30 A written plan your team can execute — with or without me.

If we stop there, you keep the memo, the fix and the plan.

№ 03 — The record

Verify everything.

no claims without receipts

On the record

“Danila is the kind of engineer who doesn't just write features but genuinely cares about performance and architecture. He delivered measurable optimizations, like a 300% improvement in shopping cart performance and a 10x build speed boost after migrating to Vite. … He mentored developers, hosted internal tech talks, and consistently raised the bar for the whole engineering team. I'd recommend him without hesitation.” Kirill Ispolnov — Engineering manager · worked together at Smartway via LinkedIn

Recommendations are public on LinkedIn, names attached. For a contract, I'll connect you with a reference directly.

Verify the work

Public — the Smartway case study Public — the EdTech engagement brief GitHub Résumé — PDF

Verify the craft

This page is the demo — no framework, no build step, no analytics. ~65 KB of hand-set HTML and CSS plus a 3 KB script, fonts self-hosted, instant on a phone. View the source ↗

№ 04 — A note

From the author.

Penza, RU · RU & EN

I'm Danila — a senior frontend engineer from Penza, six years of production frontend, most of it React, TypeScript and Next.js. I started alone — an entire B2B store shipped solo — and grew into product teams, where my work became performance, architecture, migrations and developer experience. I'm the person who cares about build times and performance budgets, and who writes the docs nobody else wants to. AI tools are instruments here, not authors; the product judgment is mine.

If you're hiring full-time: I'm looking for a team that values quality and ownership, on a product complex enough to be interesting — remote, or relocation within EMEA. If you need a contractor: the terms are above, and it starts with a two-line email. Either way, I reply within a day.

The authorPenza, RU

Now

Available for new workNowContract or full-time — remote with full EU overlap, or relocation.
Morizo Digital — current roleFeb 2026 —AI-assisted research platform: Monaco-based LaTeX/Typst authoring, AI-chat UX.
Wrapped at SmartwayJan 2026Shipped the v1 support widget to production; wrote internal LLM-practice guidelines.
EdTech MVP deliveredAug 2025Five months, empty repo to live MVP — sole frontend engineer.

Stack

React·TypeScript·Next.js·React Native
Redux Toolkit·Zustand·MobX·React Query
Vite·Tailwind·Monaco·Storybook
Playwright·WebSocket·Docker·FSD

Danila Igoshin.

Four engagements, nothing collapsed.

An AI-assisted research platform for scientists

A real-time support widget any product can embed

A founder needed a product, not a team

Kept a corporate travel platform fast while the team grew

Two ways to hire me.

By contract

Performance rescue 2 – 6 weeks · fixed scope

A migration that doesn't stop the roadmap scoped per codebase

MVP build-out 3 – 6 months · solo

Embedded senior 3 – 6 months

Full-time

A senior seat on a complex product remote · relocation

What you get on day one

The first thirty days, itemized.

Verify everything.

On the record

Verify the work

Verify the craft

From the author.

Something slow, stuck or unbuilt?