GLEB ROSEV

I build AI agent teams at YAGNI. At Sully.ai, I fixed a bug in clinic calls: the voice agent greeted people while the phone was still ringing, so they heard 15 seconds of silence when they picked up. How we eliminated 15 seconds of silence →

FOUNDING ENGINEER @ YAGNI.APP // PRODUCTION AI AGENTS
8+ YRS
Production Systems
-80%
Feedback Analysis Time (Kingpin)
15s → 0s
Dead Air at Pickup (Sully.ai)
5–12
Engineers Led

Hiring for AI agents or platform? Tell me the problem — I reply within 24h.

Now: Founding Engineer at YAGNI, building AI agent teams (PM, Builder, Reviewer) that take work from proposal to merged PR under human-approved plans. Before: healthcare voice AI at Sully.ai. 8+ years in engineering.

Gleb Rosev (also spelled Rossev) is a Founding Engineer at YAGNI (yagni.app) in Tbilisi, building production AI agent teams; previously Staff Harness Engineer at Sully.ai; 8+ years in engineering.

LinkedIn
in/rossev ↗
GitHub
Grumbash ↗
English · C1, Russian · native Tbilisi, Georgia · Remote · UTC+4
How I work: I build with AI agents every day — I plan, delegate to agents, review their output with a second "judge" agent, and keep the human decision where it matters.
How agents built this site REPLAY · PR #11

Replay of a real agent run on this site · PR #11
Try your own scenario
YAGNI case study →
02 · AGENT CORE
02 · AGENT CORE Named AI Agent Team (PM, Builder, Reviewer, Judge) under Human Plan
Experience · 2018 — now

8+ years in production

Find experience by technology
Toolbox · for skimmers and screeners

Every keyword in one place, for recruiters who skim and the ATS and LLMs that parse. Click a skill to see where I used it. The same list lives in /llms.txt.

AI AGENTS & VOICE SYSTEMS
ARCHITECTURE & CLOUD
RELIABILITY & OPS
FULL-STACK & MOBILE
LEADERSHIP
  1. Founding Engineer, AI Agents

    Nov 2026 — Present
    Tbilisi, Georgia · Remote

    Early-stage US startup building named AI agent teams that take engineering work from proposal to merged GitHub pull request under human-approved plans.

    28 PRs Merged in the first week: 98% of the code by agents, 97% of the planning by me
    • Tenant isolation: tenant-scoped query guards and sandboxed code execution.
    • Connector backfills made self-healing: stuck-cursor recovery, progress tracking and hard caps for long syncs of large workspaces.
    • Code-review agent reliability: fixed ticket-key collisions between YAGNI and external trackers that sent the reviewer to the wrong issue.
    • Agent benchmarks: realistic engineering task suites that show whether a prompt, model or harness change makes agents better or worse.
    • Risk radar: flags stalled customer runs before the customer reports them.
    • Self-improving loop (experimental): a meta-agent reads failed runs, isolates the cause and drafts a fix for the team to review.
    • Monorepo build chain reduced to one command for fresh checkouts, worktrees and CI.
    • Technical point of contact for pilot customers: demos, debugging live runs, turning feedback into engineering work.
    Stack TypeScriptNode.jsPostgreSQLClaude / OpenAIGitHubAgent EvalsSandboxed Runners
    ARCHITECTURE BREAKDOWN
  2. Staff Harness Engineer, AI Voice Systems

    Sep 2025 — Oct 2026
    Dubai, UAE

    AI receptionist platform for healthcare: voice and text agents for scheduling, care coordination and clinic operations. Sully.ai serves 400+ healthcare organizations.

    15s → 0s Dead Air at Pickup
    400+ Healthcare Orgs (Sully)
    • Led core engineering for the MENA launch: UAE infrastructure, Azure Blob Storage support, regional configuration and production readiness.
    • Removed ~15 s of dead air at pickup on outbound calls: the agent was greeting the caller while the line was still ringing.
    • Made agent dispatch reliable on LiveKit: retry-and-verify, no more duplicate agents in one call, no more silent calls.
    • Designed UAE audio-residency guardrails so TTS and STT fallbacks stay within approved regional providers instead of silently routing elsewhere.
    • Built patient-data validation for outbound campaigns: local phone formats, customer-specific schemas, clinic rules.
    • Built high-volume stress testing with headless LiveKit participants, Loki and Mimir validation, and runtime health checks; found and fixed the memory cascade behind burst failures.
    Stack LiveKitTwilioSpeechmaticsOpenAI / Claude / GeminiTypeScriptNode.jsGrafana / Loki / Mimir
    ARCHITECTURE BREAKDOWN
  3. Engineering Manager / Senior Full-Stack

    Sep 2024 — Sep 2025
    Dubai, UAE

    AI-powered multi-tenant B2B SaaS platform for wholesale.

    -80% Feedback analysis time
    12 ENG Team Led
    • Led a cross-functional team of up to 12 people while staying active in architecture and code.
    • Delivered multi-tenant catalog/order workflows with ERP/CRM syncs and feature-flagged trunk-based releases.
    • Built an LLM feedback pipeline converting Sales/CS input into product insights (-80% analysis time).
    Stack TypeScriptNestJSReact / Next.jsPostgreSQLRedisOpenAI / RAGGrafana / Loki
    ARCHITECTURE BREAKDOWN
  4. Lead React Native Developer

    Feb 2023 — Sep 2024
    London, UK

    Product engineering across fintech, crypto, AI & healthcare.

    • Led a 5-person team across web and mobile product delivery in a shared monorepo.
    • Integrated native cryptographic modules into a flagship application with 100,000+ downloads.
    • Hardened CI/CD build pipelines and production runtime stability.
    Stack React NativeTypeScriptNative Crypto ModulesMonorepoCI/CD
  5. Frontend Team Lead · RN Manager · Full-Stack

    Jan 2018 — Feb 2023
    New York & New Jersey, US

    Sports tournament platform, full-stack cloud architectures & technical mentorship.

    100K+ Crypto App Users
    220ms TTFB (1.7s TTI)
    $10M+ Funding Raised
    • Owned frontend architecture and hiring for a 5-engineer team at BattlePro; doubled velocity (25 → 55 SP) and hit 220ms TTFB / 1.7s TTI.
    • Architected a full-stack virtual networking platform at ITechArt that subsequently attracted $10M+ in investment.
    • Delivered 150+ advanced React/JS lectures at TeachMeSkills; curriculum adopted by 1,500+ students/year.
    Stack ReactNext.jsNode.jsTypeScriptAWS
    ARCHITECTURE BREAKDOWN
Beyond the CV

Self-healing GR monogram

GR monogram grown by a neural cellular automaton. Press Enter or Space to take a bite out of it and watch it heal.

An 8,320-parameter neural cellular automaton, trained from scratch, running in your browser. Every pixel runs the same tiny network and only sees its neighbours. Damage it: drag across the letters (or Tab + Enter).

Same idea I apply to production: systems that notice damage and repair themselves →

How it works: each cell holds 16 numbers, reads its 3×3 neighbourhood through Sobel filters and updates through one 128-unit hidden layer. Trained to grow from a single cell and to heal after cuts and bites, after Mordvintsev et al., Distill 2020 ↗

Writing

Field notes on AI, systems & leadership

FOLLOW ON LINKEDIN ↗
AI SYSTEMS 5-MIN FULL POST

Apple put its engineers on an AI budget. Here's what one pull request costs us.

READ BRIEF
AI SYSTEMS 7-MIN FULL POST

I trained a model on its own mistakes. Overnight, it solved none of the new tasks.

READ BRIEF
AI SYSTEMS 2-MIN FULL POST

A Personal Site Built by Agents, Judged Before Every Merge

READ BRIEF
AI SYSTEMS 8-MIN FULL POST

I benchmarked 8 models on our own code reviews. The first bug was ours.

READ BRIEF
DELIVERY 1-MIN FULL POST

A QA Engineer Walks Into a Bar and Burns It Down

READ BRIEF
AI SYSTEMS 3-MIN FULL POST

My Prompt for Picking Up a Colleague's Epic Was Mostly About Everything Except the Task

READ BRIEF
COPIED TO CLIPBOARD