Hi, I'm Yabibal

Fullstack Engineer specializing in AI security, self-healing automation, and production-grade multi-tenant systems.

About

React and Next.js on the front, Node.js and Python (FastAPI) on the back — I own the full stack and ship features that stay shipped.

LangGraph agents, RAG pipelines with hallucination detection, and human-in-the-loop validation so your AI system is as reliable in month six as it was on launch day.

Certified n8n Ambassador. I build multi-agent automation that runs 24/7 — not demo workflows, but production systems with retries, observability, and owned databases.

Multi-tenant design, per-tenant cache tagging, Row-Level Security, and CI/CD that makes deployments boring — in the best way.

Work Experience

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Senior Full-stack Developer · LohnPulse

2026 — Present · Remote

  • Production SaaS managing complex payroll workflows and tax advisor data with strict RBAC and Row-Level Security.
  • Implemented Next.js 15 Partial Pre-rendering: static shell served from the edge in <50ms with user-specific data streamed via React Server Components.
  • Dynamic per-tenant cache tagging for granular CDN purges, JWT verification, and tenant context injection at the middleware edge layer.
  • Maintained 194+ Playwright tests (E2E, API, UI) ensuring zero-regression production deployments.

Education

Addis Ababa University
B.Sc. Information Science
2015 - 2019

Studied at Ethiopia’s flagship university, with coursework spanning algorithms, software engineering, databases, and systems design through an information science lens. Built a strong foundation in problem-solving, research, and building reliable software, skills I still lean on when designing fullstack systems, AI workflows, and production automation today.

Achievements

n8n2026
n8n Ambassador

Recognized as an official n8n Ambassador for contributions to workflow automation and production-grade n8n implementations.

Projects

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Pest Leads Pro

Pest Leads Pro

Case study

Multi-agent automation platform powering a pest-control lead generation SaaS. Core design: an n8n Router Agent that scores inbound leads, routes them to matched vendors, and manages credits autonomously — no human dispatch required. A separate Digital PR agent monitors incident spikes, generates AI press pages, and fires Hunter.io outreach to earn backlinks at scale. Four background agents (Gardener SEO, Performance Manager, Auditor, Reporter) run on schedule and write results back to PostgreSQL. The frontend surfaces embed APIs, geo/FAQ widgets, and an A/B-configurable AI chat widget built on top of the same data layer.

Aegis Agent

Aegis Agent

Case study

Autonomous portfolio concierge backend: agentic RAG over Supabase pgvector, intent routing, confidence-gated answers, Google Calendar and Meet booking, and human-in-the-loop handoff for sensitive leads. FastAPI service with LangGraph-style orchestration, session memory, and lead logging. Powers the live chat agent on this portfolio.

PythonFastAPILangGraphRAGSupabasepgvectorGeminiGoogle Calendar
Dual-Agent Architecture AI

Dual-Agent Architecture AI

Case study

Production-ready dual-agent system where a Planner agent decomposes user goals into structured subtasks and a Worker agent executes them with isolated context. Implements structured handoff protocols, error recovery, and observable step-by-step output so failures surface at the right layer. Deployed as an interactive Next.js demo; the patterns map directly to production LLM workflows.

Eset Coffee

Eset Coffee

Case study

Full marketing and e-commerce web presence for Eset Coffee, an Ethiopian specialty coffee brand. Covers product storytelling, origin traceability pages, and ordering touchpoints — built with Next.js and TypeScript for fast load times and strong SEO.

Hobbies

Away from shipping code: football, competitive practice on LeetCode & Codeforces, and reading that keeps me grounded.

The Subtle Art of Not Giving a F*ck cover

The idea isn’t to care about nothing; it’s to care on purpose. I try to reserve my focus for work and relationships that actually deserve it, and to say a polite ‘not now’ to noise, vanity metrics, and drama. Same insight as the loud title, just how I’d explain it at the dinner table.

I follow and play football when I can; it's the reset button after long debugging sessions.

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Contact

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