ClubGate
A bot that grants and renews access to a private Telegram community, sends expiry reminders and handles refunds.
Independent developer
DimaSoftware Engineer & Full-stack Developer
RENZZY
Engineering digital solutions.
I build Telegram bots, web services and business software. I automate repetitive work and turn ideas into tools people can use.
BOTS / WEB SERVICES / AUTOMATION01Selected work
Selected projects.
From a Telegram bot to a warehouse app. Each case shows the problem, the workflow and what the demo verified.
PayMatch
Reconciles orders, payments and refunds from CSV and Excel, explains discrepancies and records reviewer decisions.
PortalPilot
A browser robot transfers CSV orders to a supplier portal and verifies whether submissions succeeded after a browser failure.
StockDesk
An offline Windows app for a small warehouse, with receipts and issues, barcode lookup, stock history and labels.
FlowWatch
A service that runs key browser workflows and verifies that a lead or order was actually saved on the server.
02What I do
From an idea to a working system.
The solution follows the problem. First comes understanding, then structure, implementation and verification.
01Full-stack Development
I build workspaces where teams can upload data, review results and resolve exceptions in one place.
Possible deliverables
- Responsive interfaces
- Web applications and client portals
- Interface and API integration
02Backend & API
I connect services and business rules. A bot can grant access after payment, and a server can reconcile orders and refunds and explain discrepancies.
Possible deliverables
- REST API design
- External service integrations
- Data and business logic modeling
03Automation
I automate browser work such as submitting orders from a spreadsheet or checking a form on a schedule. Each run records its outcome and flags cases that need attention.
Possible deliverables
- Data processing workflows
- Tool connections through APIs and webhooks
- Workflow automation
04AI Integration
I integrate OCR and models into specific workflows. For example, a tool can extract data from a photo and let someone review it before saving.
Possible deliverables
- AI API integration
- Tools for working with text and knowledge
- AI features within an existing product
05Custom Software
I build software for specific workstations. A warehouse app, for example, can track stock and movements, print labels and work offline.
Possible deliverables
- Internal tools
- Prototypes for testing an idea
- Purpose-built applications
03Skills
Technology in practice.
Open any card to see the kinds of problems I solve with that technology.
Primary languagePython
- I build complete bots and web services in Python, including APIs, databases, background jobs and tests.
- I process CSV, Excel, PDFs and images, and build tools for imports, reconciliation and reporting.
- I automate browser workflows, process whole batches of orders and verify what happened when a site fails to respond.
Backend development
aiogram / Telegram Bot API
- I build Telegram bots with aiogram, including menus, guided conversations and separate user and admin permissions.
- I can build a club bot with Telegram Stars payments, access renewals, invitations and reminders.
- I handle files and media, persist state between runs and prevent duplicate events from granting access twice.
FastAPI
- I design REST APIs with typed requests, input validation and useful error responses.
- I connect databases, authentication and roles, and build APIs for internal tools and service integrations.
- I move long jobs into the background so users can upload files, track progress and download the result.
Go
- Worked on APIs, accounts and access control in Forte Vision.
- Integrated a PostgreSQL queue for background video processing.
Node.js
- Schedule checks and separate scheduling from execution.
- Process check results and send incident notifications.
Data & automation
PostgreSQL
- I design tables, relationships and migrations for orders, payments, refunds and audit history.
- I use transactions and database constraints to stop repeated events from creating duplicate records.
- I build database-backed queues that survive restarts and prevent an old worker from overwriting results after a job is reassigned.
SQLite
- I build local databases for offline apps, including catalogues, stock counts and movement history.
- I record stock movements in a single transaction so stock counts and history stay consistent if a write fails.
- I add barcode lookup and backups, and verify that the data can be restored from a backup.
Playwright
- Automate form filling and batch order processing.
- Reproduce lost responses and verify the outcome against portal records.
Docker
- I build Docker images for APIs and workers and start the app with its database using one Compose command.
- I isolate demo and test environments and configure variables, persistent data and service startup order.
- I verify clean builds, migrations and restarts. I ran PortalPilot’s container setup from a freshly extracted archive.
Web interfaces
TypeScript
- I use TypeScript for both interfaces and server logic, including dashboards, APIs and background checks.
- I model API data and UI states with types so data mistakes are caught earlier.
- In FlowWatch I built scheduled checks, run history and incidents that close after recovery.
JavaScript
- I build interactive forms and dashboards in plain JavaScript, handling input, confirmations and errors.
- I show progress for long-running work and refresh the results. PayMatch uses this for reconciliation and imports.
- I build menus, toggles and animations that work with keyboard input and on phones.
React
- Build reusable components for navigation, cards and pages.
- Verify interactive components with keyboard input and mobile layouts.
Next.js
- Generate static routes and metadata from structured content.
- Link localized pages and preserve the current destination when switching languages.
Tailwind CSS
- Define shared color and typography tokens.
- Build responsive layouts and check contrast and focus.
Windows applications
Media & documents
FFmpeg
- Process videos in background jobs and extract preview frames.
- Choose output formats and processing settings for the available source.
OCR
- Extract text from photos and screenshots with local RapidOCR.
- Let users confirm and correct extracted data before saving it.
Model experiments
PyTorch
- Ran local model training and inference.
- Evaluated predictions on recordings held out from training.
Transformers
- Loaded a multimodal Qwen model and its saved weights.
- Verified an experimental path from video input to API output.
LoRA
- Fine-tuned and saved adapters with PEFT.
- Compared the adapter with the base model and checked for overfitting on held-out data.
04About me
Welcome to Renzzy
RENZZY
I love projects that cut out manual work. I can build all sorts of interesting, useful things for you. Just get in touch!
I always pay attention to the little things when I build something. As I like to say, “It’s a small thing, but it feels good.” And I’m Python’s biggest ambassador ;)
In my spare time
05The next step
Something in mind? Let’s make it work.
Tell me what you want to build or improve. A useful solution starts with a conversation.