Yevoo Justice Selasi

TenetXAI — AI Security & Governance

• Identified a critical blind spot in the policy engine: NoSQL and cloud-native databases (ClickHouse, Aerospike, Neo4j) had no detection coverage for destructive operations, unlike traditional relational databases.
• Built new detection logic and Cedar policies covering destructive operations across ClickHouse, Aerospike, and Neo4j, closing the parity gap with existing relational-database protections.
• Extended detection to OS-level database service termination, closing 10 of 12 identified gaps with end-to-end verification and logging.

AI-Assisted Portfolio Manager — Bill & Melinda Gates Foundation

• Built a Claude Skills system that reads each grantee's project phase and auto-sends a tailored monthly update request with the correct template attached.
• Built a scheduled Claude routine to detect exactly what changed in a grantee's reply, routing edits to the PO for review before tracker updates.
• Integrated Power Automate to handle the email round-trip end-to-end and sync everything to OneDrive automatically.

QA Automation System

• Built a scraper generating a structured UI action contract, feeding an AI-driven pipeline into test plans, YAML test cases, and Playwright specs.
• Triggered the full pipeline automatically on every deploy and wired it into CI/CD as a gate via Allure reporting.
• Built an automated failure-triage system classifying test failures and routing them to the right fix.
• Built a mock-LLM service — a Dockerized fake OpenAI-compatible API replaying deterministic scripted flows — solving flaky agent-workflow testing.

Agent Framework — AI Agent Orchestration Platform (LangGraph)

• Implemented cross-node shared context (context_write/context_read) enabling reliable data handoff through multi-step workflows.
• Architected a Cedar policy-based governance layer with tenant-scoped access control and a policy builder UI.
• Built agent memory management via sliding-window summarization with tool-pair repair.
• Diagnosed and fixed a critical shared-context bug where LangChain MCP tool outputs weren't reaching downstream agent nodes.

PUCAR & Chat SDK — LangGraph Agent Reliability & SDK Architecture

• Diagnosed and resolved critical disconnects between LangGraph agents and the UI Action MCP server, restoring production reliability.
• Migrated a React-based chat application into a framework-agnostic Vanilla JS SDK for seamless third-party embedding.
• Developed a dynamic UI Actions SDK parsing backend-driven action instructions.
• Integrated Bhashini STT/TTS with Google Speech API fallback for resilient multilingual audio support.

Open Agent Platform (OAP)

• Built end-to-end MCP server onboarding workflows (create, configure, approve, duplicate, organize, download).
• Implemented multi-collection drag-and-drop organization using dnd-kit.
• Developed a Swagger (1.0–3.0) to OpenAPI 3.1 auto-conversion pipeline.

Bihar Krishi — Full-Stack AI Chat System (Frontend & LangGraph Agent)

• Migrated Bhashini STT/TTS processing to the frontend, reducing audio latency by ~50% and expanding support to 18 languages for 20M+ farmers.
• Redesigned LangGraph routing with structured normalization and fallback parsing, cutting audio/routing errors by ~90%.
• Packaged the chat experience as a framework-agnostic embeddable widget integrated across multiple third-party government platforms (Pucar, Dristi).

• Co-founded and led development of a React Native (Expo Router) shopping app with real-time buyer-vendor chat (Supabase), media-rich messaging (Cloudinary), and infinite video scrolling.
• Designed and maintained a scalable 100+ endpoint RESTful API (Express.js, MongoDB) powering all mobile/admin functionality.
• Built a URL-shortener and SSR-powered deep-link system (Next.js), plus a subscription-based push notification system.
• Built a multi-vendor order system with split orders, real-time status updates, and delivery-fee calculation via the Google Distance Matrix API.

• Built the entire platform end-to-end — student, coach, and employer portals — while serving as Software Engineering Instructor for 2 cohorts.
• Developed a dynamic student dashboard with progress visualization (Highcharts), plus real-time chat/video (VideoSDK.live).
• Created Talent Passport (Gemini AI-generated résumés) and CareerPilot, visualizing student strengths as a React Flow diagram.
• Built a Job Tracker System using Python/Selenium to scrape and match job listings to students.

• Built a rental platform (Next.js, React, PostgreSQL) for farmers to discover and rent equipment by proximity.
• Built a USSD server on AWS EC2 (*920150#) for order placement/callbacks, extending access to non-smartphone users.
• Integrated real-time chat (Supabase) connecting farmers directly with equipment owners.
• Owned backend, database, and infrastructure end-to-end — deployed via cPanel with rsync.

• Built and maintained RESTful APIs using Node.js and Express.js for course registration, authentication, and user management.
• Designed and optimized PostgreSQL schemas for managing users, course data, and transactions.