Andrey Markin
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Mark Life Ltd

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  2. Services
  3. AI & Full-Stack Development
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Mark Life Ltd

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AI & Full-Stack Development

From idea to production — fast, and built to last.

I design and ship AI products and full-stack apps end to end. You get working software in days, not months — without trading away reliability.

Book a free callExplore services
React
Next.js
TypeScript
Node.js
Go
Python
OpenAI
Anthropic
PostgreSQL
Supabase
Drizzle
Stripe
Expo
Telegram
Slack
Vercel

15K

monthly active users (Pickart)

30K+

leads generated (Outrizz)

€1M+

transactions handled

40+

apps shipped

2 weeks

to an MVP

Trusted by

PickartOutrizzDashlyHelping to LeaveOzma.io

What I build

One person, the whole stack — from the AI layer down to the database and deploy.

AI Applications

Agents, RAG, chat, and voice features that do real work, not just demos.

Key Features:

  • Autonomous agents & tool calling
  • RAG over your own data
  • Chat & voice interfaces
Start Your AI Applications

Full-Stack Web & Mobile

Production web apps and cross-platform mobile from a single codebase.

Key Features:

  • Next.js web apps
  • React Native + Expo mobile
  • Shared end-to-end TypeScript
Start Your Full-Stack Web & Mobile

Marketplaces & SaaS

Multi-sided marketplaces and SaaS platforms with auth, roles, and billing baked in.

Key Features:

  • Multi-tenant & role-based access
  • Complex relational data models
  • Dashboards & analytics
Start Your Marketplaces & SaaS

E-commerce & Payments

Stores and checkout flows wired to Stripe, multi-currency, and webhook-driven order logic.

Key Features:

  • Stripe payments & webhooks
  • Multi-currency pricing
  • Inventory & order management
Start Your E-commerce & Payments

Bots & Automation

Telegram, Slack, and Discord bots plus workflows that take the busywork off your plate.

Key Features:

  • Telegram / Slack / Discord bots
  • Workflow & approval automation
  • Scheduled jobs & alerts
Start Your Bots & Automation

Data Pipelines & Integrations

APIs, ETL, and vector databases that move and reshape data between your systems.

Key Features:

  • REST & API integrations
  • ETL & data sync
  • Vector DBs for AI search
Start Your Data Pipelines & Integrations

Fast doesn't mean fragile

I move quickly because the foundations are solid — typed, tested, and built to keep running once I hand it over.

Effect-TS backend

Pickart's production backend runs on Effect — errors are typed values, not surprises, with dependency injection layered in for clean, testable code.

End-to-end TypeScript

One type system from database to UI, with Zod validation across the stack, so a change in the schema surfaces everywhere it matters before it ships.

Tested & automated

Playwright end-to-end tests and CI/CD quality gates run before anything reaches production.

Resilient AI

Multi-provider LLM failover and redundancy keep AI features up even when one provider goes down — proven on Outrizz.

Hexagonal architecture

Core business logic stays decoupled from infrastructure (as in Recruit AI), so swapping a provider or database doesn't mean a rewrite.

Proof, not promises

PickArt: Art-Hospitality Marketplace Platform
PickArt: Art-Hospitality Marketplace Platform

PickArt: Art-Hospitality Marketplace Platform

A marketplace platform that transforms hospitality properties into curated art galleries, enabling artwork discovery, purchase, and ownership transfer through QR code technology and comprehensive digital infrastructure.

Next.jsTypeScriptSupabaseStripeReact PDFNext-intlDrizzleTanStack Query
View Project
Outrizz AI: Event Engagement Platform
Outrizz AI: Event Engagement Platform

Outrizz AI: Event Engagement Platform

A comprehensive AI-powered platform that transforms offline events into pipeline-generating machines through two integrated solutions: intelligent pre-event lead sourcing and qualification, plus real-time event engagement and conversion optimization.

Next.jsReact NativeAItRPCTurbo MonorepoDrizzleSupabaseWorkOS
View Project
Recruit AI: Intelligent Recruitment Matching
Recruit AI: Intelligent Recruitment Matching

Recruit AI: Intelligent Recruitment Matching

Two-sided marketplace matching platform with a retrieve-and-rerank pipeline: ANN vector search with pre-filtered hard constraints, followed by multi-factor re-ranking. Built on Effect.ts hexagonal architecture with compile-time dependency guarantees.

Next.jsEffect.tsQdrantVector SearchRetrieve & RerankVercel AI SDKDrizzlePostgreSQLTurborepo
View Project
Intelligent Aggregator Platform
Intelligent Aggregator Platform

Intelligent Aggregator Platform

A high-performance, SEO-optimized aggregator platform built with Next.js, featuring AI-powered search and intelligent data exploration capabilities.

Next.jsTypeScriptSupabaseOpenAITailwind CSSZodDrizzle
View Project
AI Form Assistant
AI Form Assistant

AI Form Assistant

AI intermediary that fills forms through conversation. Speak or type naturally, AI handles the fields with intelligent parsing, validation, and multi-field updates.

Next.jsAI SDKGoogle GeminiOpenAIReact Hook FormZodshadcn/ui
View Project
Telegram Claude: Remote Claude Code via Telegram
Telegram Claude: Remote Claude Code via Telegram

Telegram Claude: Remote Claude Code via Telegram

A Telegram bot that runs Claude Code CLI on your VPS and streams responses back to chat. Supports project switching, session continuity, voice messages, plan mode, and message queuing.

TypeScriptBunTelegram BotClaude CodeAIgrammyGroq
View Project

What clients say

"Wow! Thank you guys, that was super quick!"

TZ

Timofey Zhitenev

Co-founder at Pickart

"Thank you so much for being with us, it's a pleasure to work with you."

OK

Olga Kulishova

CEO at Outrizz

"I've sent a brief to edit our site and gave access to the repo. The updated site was already published to prod in a few hours!"

KM

Kirill Markin

CEO at Ozma.io

I ship — every day

3,852

Contributions

494

PRs

53

Week Streak

1

Day Streak

NovDecJanFebMarAprMay
Mon
Wed
Fri
Less
More

Questions, answered

Development Process

Fast, transparent, and low-risk — you see working software in days, not months.

1.

Idea & Planning

You share your idea, and we provide you with tech stack, deployment strategy, and project timeline. We'll work together to define the scope, features, and technical requirements to ensure we're aligned on the vision and goals for your project.

2.

Proof of Concept | 3-5 days

Within just a few days, we create a working proof of concept to test the core ideas and functionalities. This rapid prototype helps validate technical feasibility and gives you something tangible to evaluate before committing to full development.

3.

First Iteration of MVP | 2 weeks

We quickly develop the first version of the MVP, allowing the business to validate their idea in a real-world environment. This focused approach delivers core functionality that can be tested with real users to gather valuable feedback early in the process.

4.

Validation and Improvements

After validation, we make improvements, add robust features, conduct testing, and provide deployment support. Based on user feedback and performance data, we refine the product, enhance the user experience, and ensure everything is production-ready.

Pricing

Flexible options to meet your project needs and budget

Default
For standard projects with flexible timelines
$55/h
  • Full-stack development
  • AI integration
  • We set the deadline
  • Regular updates
Get Started
Priority
For time-sensitive projects with specific deadlines
$75/h
  • Expedited development
  • Advanced AI solutions
  • You set the deadline
  • Daily progress updates
Get Started
Project
Pay per deliverable, tailored specifically to your business goals
Custom
  • Fixed pricing per milestone
  • Clearly defined deliverables
  • Transparent timelines
  • Flexible revisions and support
Get Started
AI Coding Consulting
Expert guidance for AI transformation initiatives
$110/h
  • Team training & workshops
  • AI development strategy
  • Codebase optimization
  • Productivity enhancement
Get Started

Have an idea? Let's get it into production.

Tell me what you're building and I'll show you the fastest reliable path to ship it. The first call is free — no pitch, just a plan.

Book a free call