Yaroslav — Full-stack web developer

● Full-stack web developer / Yaroslav

I build websites and web services that work for the business. From idea to production — one person, the whole chain.

Co-founder & CEO of Comersi

Shipping commercial code since 18

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01 / Who I am

I build websitesthat make money.

My name is Yaroslav. I'm a full-stack web developer: I plan, design, code, launch and maintain — on my own.

Every project in this portfolio was built by me alone, from scratch. All of them run in production and earn money for their owners — that is the main metric I judge my work by.

I love problems where product meets engineering: when the job is not just to code a mockup, but to figure out how the site will sell — and carry it all the way to the first payment.

years old — that's when I took my first paid project

02 / Path

From the first gigto my own product.

01 — Start
Self-employed
First commercial projects at 18. Working directly with clients: brief, estimate, design, code, deploy, support — all by myself. That's where I learned to speak the language of business results.
01
02 — Growth
In-house
Product development in a team: processes, code review, scheduled releases, responsibility for other people's money. Freelancer speed, plus an engineer's discipline.
02
03 — Now
Co-founder & CEO, Comersi
Came up with a marketplace for buying and selling businesses with company due diligence by tax ID, and wrote all of it myself: the architecture, every feature, every edge case. I lead the product, the code and the growth.
03
04 — Next
Your project
I take on projects where results matter: a product launch, a store, a service or a website that has to pay for itself. Direct contact, no middlemen.
04

03 / Approach

How Iwork.

01
Business problem first
Before opening the editor I figure out how the project will earn: who the customer is, what they buy and what stops them from buying.
02
One head, the whole chain
Design, frontend, backend, database and server in one pair of hands. Nothing gets lost between contractors, decisions are fast.
03
Production, not a mockup
SEO, speed, analytics, payments, admin panel, backups — everything a site needs to survive in the real world is built in from day one.
04
I stay after launch
Launch is the beginning. I support, grow and scale the projects I build, and I'm honest about what's worth changing and what isn't.
05
AI is a tool, not an autopilot
I hand a model what's easy to verify: boilerplate, tests, drafts. Architecture, security and anything that touches money I decide myself. I read AI-written code like a stranger's pull request: models are confidently wrong and miss edge cases. Client data never goes to cloud models.

04 / Services

What Ido.

01Landing pages
Landing pages
One-pagers for ads and product launches: a strong first screen, a clear offer, fast loading, analytics and lead forms.
- Conversion
- Motion
- A/B-ready
01
02Corporate websites
Corporate websites
A company website people trust: services or product catalog, case studies, documents and an admin panel to update content yourself.
- CMS
- SEO
- Multilingual
02
03Online stores
Online stores
Catalog, filters, cart, customer account, payments via SBP, invoice or card acquiring, integrations with accounting and delivery.
- Catalog
- Payments
- Accounts
03
04Marketplaces & web services
Marketplaces & web services
Complex products with roles, subscriptions, chats, external APIs and payment logic. Architecture that survives growth.
- Architecture
- Roles
- Subscriptions
04
05Integrations
Integrations
Payment systems, CRM, 1C, government registries, email, messengers, external APIs — I wire the website into business processes.
- API
- Payments
- Automation
05
06Support & growth
Support & growth
I take over existing projects: updates, speed-ups, fixes, new features and regular backups.
- SLA
- Performance
- Refactoring
06
07Design, 3D & video
Design, 3D & video
Interfaces in Figma, 3D in Blender and Three.js, promo video editing in Premiere Pro, presentation layouts in InDesign.
- UI
- 3D
- Motion
07

05 / Stack

Engineered forproduction.

01Next.js · React · TypeScript · JavaScript
Frontend
Server rendering, App Router, strict typing and interfaces that stay smooth even on budget phones.
02NestJS · PHP · Payload CMS
Backend
APIs, business logic, roles and permissions, admin panels that let clients manage content themselves.
03PostgreSQL · MongoDB · phpMyAdmin
Data
Schemas designed to survive growth: indexes, migrations, reports and careful handling of money.
04Tailwind · CSS · PostCSS
Styling
Design systems, pixel-perfect responsive layouts and motion that looks expensive without hurting performance.
05Docker · CI/CD
Infrastructure
Containers, automated builds and deploys to your own servers — no lock-in to a single platform.
06Three.js · Blender · Premiere Pro
3D & motion
WebGL scenes, shaders, 3D models and promo videos — the things that make a website memorable. Like this one.
07Figma · InDesign
Design
Prototypes, interfaces and print. Design and code in one pair of hands means nothing is lost in handoff.
08Claude Code · Local LLMs · Code review
AI
A working tool, not a replacement for an engineer. I spot where a model is wrong or shallow, fix its code and decide what it can be trusted with. I can run models on my own servers.

06 / Achievements

What'sdone.

3+
years of commercial development — from self-employment to my own company
100%
of the portfolio built solo, from scratch — and running in production
CEO
co-founder of Comersi: came up with the product and wrote all the code of a business marketplace with tax-ID due diligence
3
projects delivered to clients — all running in production
AI
ran Comersi's own neural networks on its own server — user data never leaves for the cloud
∞
curiosity for hard problems: from shaders to tax reports over an API

∞