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Denis Stetskov

Tech Lead & Full-Stack Engineer (Node.js, React, MySQL, AWS). 10+ yrs building scalable systems, mentoring teams & exploring AI, SaaS, and blockchain projects. Based in Kyiv, Ukraine.

Kyiv, Ukraine Joined on Mar 22, 2023 https://techtrenches.substack.com/

Work

Ninetwothree, Tech Leadership

Full-stack generalist with depth in Node.js, React, TypeScript, MySQL/Prisma, AWS. Experienced in building scalable SaaS, blockchain, and AI-driven apps. Strong in DevOps, testing & architecture.

QuillAI side-project, turning docs into secure AI assistants with zero infra. Exploring prompt pipelines, SaaS patterns & collaboration features in free time.

Consulting and collaborations on full-stack architectures, scaling engineering teams, and integrating AI/LLM features into production systems.

8 posts published

1 comment written

10 tags followed

Oct 14

The Systems That Survive: Four Years of War and the Math of Crisis Leadership

#management #leadership #productivity #career

8 min read

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Cover image for Supervising an AI Engineer: Lessons from 212 Sessions

Oct 7

Supervising an AI Engineer: Lessons from 212 Sessions

#webdev #programming #ai #tutorial

5 min read

Cover image for The 90-Day Trial That Predicts Who Thrives (And Who Fails)

Oct 6

The 90-Day Trial That Predicts Who Thrives (And Who Fails)

#leadership #career #management #productivity

7 min read

Cover image for What a Year-Long Hiring Overhaul Taught Us About Retention (Hint: It’s Not Money)

Oct 3

What a Year-Long Hiring Overhaul Taught Us About Retention (Hint: It’s Not Money)

#discuss #career #management #hiring

7 min read

Cover image for How 4 Simple Signals in 1:1s Expose Burnout Before It Explodes

Oct 2

How 4 Simple Signals in 1:1s Expose Burnout Before It Explodes

#productivity #leadership #career #management

4 min read

Cover image for Why Dashboards Lie And the Feedback System That Finally Gave Us the Truth

Oct 1

Why Dashboards Lie And the Feedback System That Finally Gave Us the Truth

#productivity #career #management #webdev

2 min read

Cover image for The Brutal Reality of AI in Engineering: Lessons from Q3 2025

Sep 30

The Brutal Reality of AI in Engineering: Lessons from Q3 2025

#programming #ai #development #software

10 min read

Cover image for The Great Software Quality Collapse: How We Normalized Catastrophe

Sep 29

The Great Software Quality Collapse: How We Normalized Catastrophe

#ai #software #engineering #development

6 min read

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