From idea to a finished project
Turnkey custom development of information systems - from architecture to operations and support. Fast and reliable: one person accountable for the result, on the foundation of an in-house open-source platform proven in real projects since 2017.
How it works
From architecture to production and maintenance. One person accountable for the result.
Understand the task
I dig into your business processes and goal. Not "code to spec" - I understand what must work and why.
Design the architecture
For the business goal, timeline and budget. A minimally sufficient solution instead of fashionable over-engineering.
Ship to production
On a ready foundation: auth, REST, workflow, files already exist. The budget goes to your logic, not infrastructure.
Maintain it
Operation, evolution, hand-off. The system lives for years - not "delivered and forgotten".
Delivered Projects
Projects built on an in-house codebase for individual customer requirements. Each project is an active system you can open and verify.
ChargeMeCar
European deployment of the EV charging platform: Stripe payments including ad-hoc QR payment under the AFIR regulation, OCPI roaming readiness. A brand on the Apostol CSMS platform.
CopyFrog
AI platform for marketing and e-commerce: generating ad copy, images and video for products and services, orchestration of several AI providers, subscriptions and card payments.
OCPP CSS
A retail service for charging station owners: self-service station connection in ~15 minutes, drivers' money goes straight to the owner's account with an automatic tax receipt. A brand on the Apostol CSMS platform.
Ship Safety ERP
Safety management system for shipping companies. SOLAS and ISM Code compliance, certified for use by a national software registry.
Apostol ARB
An aggregator of arbitrage opportunities on crypto futures: real-time quotes from Binance, Bybit, OKX, MEXC and Bitget, automated pair discovery, trader signals and Telegram control.
DEBT-Master
Utility debt-collection automation for property management companies and other housing-sector organisations: pre-trial work, court orders and claims, enforcement proceedings, statutory penalty calculation, data import and court document generation.
Campus CORS
Real-time GNSS correction delivery over the NTRIP protocol: a base-station network provides centimetre-level positioning accuracy - precision agriculture, geodesy.
Talking To AI
Telegram chatbot for AI conversations (ChatGPT). Implemented entirely in PL/pgSQL - from business logic and payments to the OpenAI API integration.
BitDeals
A P2P deal platform with buyer funds protected by 2-of-3 bitcoin multisig escrow: deal data is PGP-signed, server nodes synchronize over HTTP and Bitmessage. Built entirely in Python and React - the stack is chosen for the task, not the other way around.
Apostol CRM
A ready-made open-source CRM assembly - the template every new project starts from: authentication, REST API, roles and workflows are already built and running. Fork it and build your own CRM instead of the infrastructure.
And it runs for years
Have a similar task?
A free 30-minute call: we go through your task and I send a written estimate of timeline and budget.
Fast and reliable
Development moves fast and the result holds up in production for years. Here's why:
A ready foundation - A-POST-OL
The open-source A-POST-OL platform covers many months of infrastructure out of the box: authentication, REST API, workflow, files, queues, audit log, localization. The project budget goes to your business logic, not to reinventing the wheel.
One person - a team's output
Own platforms as the foundation plus AI tools in development, review and documentation deliver output comparable to a team - with one point of accountability and direct contact with the architect.
Production reliability
24/7 operation, zero-downtime deployment, dev/stage/prod separation, migration control. Engineering discipline from the banking domain, where the cost of a mistake is money.
An in-house open-source platform
Projects are built on A-POST-OL and db-platform - my own open-source platforms carrying production load since 2017. Authentication, REST API, workflow, files, queues and reports are already built and battle-tested - the project budget goes into your business logic, not infrastructure.
Architecture, reliability, benchmarks and internals - on a dedicated page for those who want the details.
More about the platform →Your project - your code
Contractor independence is built into the architecture.
Open foundation
The A-POST-OL and db-platform frameworks are open-source (MIT), in production since 2017. No closed "black box".
You own the sources
Project code stays with the client. Business logic is written in PL/pgSQL - a SQL dialect of PostgreSQL, readable by any developer who works with databases.
Hand-off ready
The project can be maintained and evolved by any PostgreSQL developer - no lock-in to one person.
Terms & Pricing
Two ways to work
Turnkey
I take the whole project - from architecture to production and maintenance. One point of accountability.
$100/hour
$800/day · $4,000/week · $16,000/month
Inside your team
I join your team on a project basis or reinforce the backend. I work within your processes.
$60/hour
$480/day · $2,400/week · $9,600/month
Minimum engagement - one week per month; you decide the rest.
Project cost
To gauge the total cost of a project:
| A compact MVP or an integration on the ready foundation | 1-1.5 months | $16,000-24,000 |
| A production system with several user roles and payments | 3-5 months | $48,000-80,000 |
| A multi-tenant SaaS at the Apostol CSMS scale | 6+ months | $96,000+ |
Exact figures - after a short call to scope the task. Engagement can stay partial: a smaller budget means fewer hours a week, not no contractor at all.
About the developer
Alen Prepodobny - a sole proprietor since 2021. 25+ years in IT, 10+ of them as a technical director; I grew up in banking IT, where the cost of a mistake is measured in money and regulation. I take a project, dig into the client's business processes, and carry it from idea to production - then maintain it. A-POST-OL and db-platform are my own tools, grown out of real projects: EV charging, maritime safety, fintech, geodesy.
Custom development
- •Frog IT SARL (France) - for clients in the EU
- •IE Prepodobny Alen Alekseevich - for clients in Russia
Get in touch
Describe your task - I'll respond within a day
What happens next
- 1I respond within a day - personally, not a bot or an account manager.
- 2We hop on a 30-minute call - free, no obligations, just to scope the task.
- 3I send a written estimate of timeline and budget - then it's your call.