Portfolio

Products we have built: the challenge, the solution and the result.

Platform

Technologies

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Team engagements

Projects where I worked as part of a client’s team. Client names are left out.

Accounting automation for small business

Aug – Oct 2025

RoleFull-stack developer

An accounting platform for Ukrainian sole proprietors.

FastAPI
PostgreSQL
Redis
Next.js
Docker

Solution

I owned the notification microservice and its front end: one template system for email, SMS and Telegram, delivery logs with full content, read status, per-channel delivery settings (moved from primary/backup to multi-select), a Telegram bot; service-to-service authentication with a token client cached in memory and Redis and a move to JWT-only without stopping other services; integration with the government tax-data service — tax-ID lookup, digital-signature expiry checks and tax-payment analytics with risk scoring; a notifications page and bell in the web app; tests and deployment guides.