01 / DeveloperContractor for agencies & businesses
I’m Dmitrii Troshchenkov, an independent full-stack and AI developer. I build web apps, AI features and automation for agencies, companies and founders. Before software, I spent over ten years inside industrial operations, so every project starts with how the work gets done today.
Contract, hourly or per project
02 / For agencies
Part-time or full-time on one of your client projects, for weeks or months.
LLM integrations, agents and document processing in Python or TypeScript, with LangChain, LangGraph and RAG.
Review, stabilise and modernise a client’s old system, then hand it back documented.
I work in your repositories, task tracker and channels. Your clients stay your clients.
03 / Services
Put language models to work inside your existing software, safely and measurably.
Software shaped around how your team actually works, built from UI to hosting.
Remove repetitive work between systems, with numbers to prove the saving.
Keep the system your business depends on running, then move it to modern technology without stopping work.
04 / Work
Case 01B2B services
An AI system reads invoices and receipts from PDFs, photos and scans, turns them into structured data and imports it into accounting systems, saving 1–2 hours a day.
TypeScript · Node.js · OpenAI SDK · Gemini SDK · PostgreSQL · Hetzner
Result
1–2 hours a day saved per specialist
Read case
Case 02Hospitality
An internal management system for menus, reservations, staff scheduling and analytics, with a visual menu editor that non-technical staff use on their own.
React · TypeScript · Node.js · Express · PostgreSQL · AWS
Result
100+ hours saved per month
Read case
Case 03Civil construction
Automated waste accounting and regulatory reports for engineering teams on construction sites, replacing hours of daily spreadsheet work.
TypeScript · Next.js · Node.js · PostgreSQL · Python · FastAPI · Pydantic · LangGraph · RAG · Hetzner
Result
≈ $3,000 / month per engineer
Read case
Case 04B2B services
An AI agent connected to Gmail reads every incoming email, decides what it is about and carries out the set action, such as a reply, forward, label or folder.
TypeScript · Node.js · Gmail API · OpenAI / Anthropic / Gemini · Hetzner
Result
~70% of emails handled automatically
Read case
05 / Approach
I start with the people, the data and the place where the work gets stuck. The technology is chosen after that.
Before building, I estimate the saving with a formula you can recalculate yourself. After launch, I measure the real result.
Planning, design, development, hosting and support come from one person, so nothing gets lost in hand-offs.
Code, servers and documentation live in your accounts. You can change AI providers, or developers, without starting over.
06 / Notes
2 min read
A simple formula for the time and money a business automation will save, with a worked example and the checks that keep the estimate realistic.
#automation #planning
2 min read
How to add AI to the software a company already runs without a rewrite, from choosing the first use case to keeping costs and errors under control.
#ai #integration
Next step
Describe the task in a few lines and attach any files, whether you need help inside your team or a whole project built. If it’s easier to talk, book a 30-minute call.