Олександр

Oleksandr Shtefan
Krakow, Poland · Telegram: @xobandech

· [open contact info](look above in the "contact info" section) · LinkedIn · GitHub

SUMMARY

Full-stack engineer (JavaScript/TypeScript, Go, PHP) with 3+ years in ad-tech at MGID, building
high-load platforms, API integrations, and custom media-buying solutions that make traffic
arbitrage and campaign management easier. Strong CS fundamentals and a passion for
data-driven development. Primary used technologies – Nest.js, Golang, JS/TS

CORE SKILLS

• Languages: JavaScript · TypeScript · Golang · Python · PHP

• Frameworks & Libraries: React · Next.js · Redux · Nest.js · GraphQL· Laravel

• Databases: MongoDB · SQL

• DevOps & Tooling: Git · Docker · Tailwind CSS · Sass · Figma · WordPress

EXPERIENCE

MGID — Team Lead / Software Engineer | Jan 2023 – Jan 2026, Krakow

• Led a team of 3 engineers while contributing hands-on to development

• Designed and shipped API integrations, App structures, Database schemas, etc.

• Created custom tracking tool with a lot of integrations (Trackers, Traffic Sources,
Monetization Platforms)

• Worked on various internal and external projects

Freelance — Full-stack Developer | Jun 2022 – Dec 2022

• Delivered web apps for few small clients using React, Next.js, etc.

Local Internet Provider — Computer Systems Engineer | Jan 2021 – Jun 2021

• Maintained network infrastructure and gained hands-on experience in the
telecommunications sphere

EDUCATION

B.Sc. Intelligent Systems · Technical University of Košice · 2022 – 2025
CERTIFICATIONS

• Elements of AI (University of Helsinki)

• Complete React Developer 2023 (Udemy)

OTHER

Willing to relocate - Yes (Remote possible too)