Denis Yurchak

Built and scaled Yadaphone to 4500+ paying customers and $15k MRR alone in 6 months. I code and write about life on X.

Things I've Built

A collection of projects I've built and launched, from SaaS platforms to AI-powered tools.

Yadaphone

Live

Solo founder of a service that allows individuals and teams to make and receive cheap international calls directly from the browser. Grew to 10,000 paying customers and secured dozens of enterprise clients. Featured on Product Hunt and recognized in VoIP industry media publications.

VoIPTypeScriptSaaSNextJSSupabase

PhotoshootPro

Live

Single-handedly built a platform for business photo generation using NextJS, Supabase and TypeScript. Leveraged Flux AI model for image processing. Achieved remarkable time-to-market by going from initial concept to first paying customers within one month.

NextJSTypeScriptSupabaseAIFlux

Lingobrew

Live

Designed and built a B2C platform for language learning. Scaled from 0 to 1000 monthly active users. The platform handles aggregation from 50 RSS news feeds in 10 different languages with translations, audio generation and AI-powered content sorting.

NextJSTypeScriptSupabaseAIUpstash

AI Photo Telegram Bot

Live

Created a Telegram bot (@gen_photo_ai_bot) for AI-powered photo generation. Built using Node.js and the Telegram Bot API, integrated with state-of-the-art AI image generation models to provide users with an accessible way to create AI-generated photos directly in Telegram.

NodeJSTypeScriptTelegram APIAI

Professional Experience

A journey through my career building scalable systems and helping technical teams.

Consultant Software Engineer

Self-employed

May 2024-Present

Helped 5 VC-backed scale-ups on various greenfield projects
Integrated 6sense API and developed user-facing dashboards for web analytics
Built backend systems using Go and NodeJS
Developed frontend applications with React, NextJS, and TypeScript
Implemented data analytics using BigQuery and AWS
Utilized Kafka for message broker functionality

GoNodeJSTypeScriptReactNextJSAWSBigQueryKafka

Senior Software Engineer

Brevo

Jun 2022-May 2024

Led development of a phone-related product serving 100,000+ customers
Designed and launched a company-wide service for phone number procurement
Implemented hexagonal architecture and DDD principles
Deployed using Github Actions, Kubernetes and ArgoCD
Mentored team members in Go development practices

GoKubernetesArgoCDGithub ActionsDDD

Senior Software Engineer

Collab Clique

Sep 2021-Jun 2022

Developed an efficient system for communication and decision-making regarding new features
Individually developed a web platform for coaching digital creators
Created a web frontend using React and TypeScript
Built the backend with Go
Implemented an internal credit-based payment system
Enabled user chat functionality using WebSockets
Integrated video call capabilities using WebRTC