Software Engineer | Web Systems, Backend Architecture & AI Agents
Nigeria · Open to Freelance, Contract & Remote Engineering Roles
Software engineer focused on the layers of a system users only notice when they fail: authorization boundaries, input validation, predictable fallback paths, and durable state persistence.
My work spans production web applications with row-level database security, autonomous CLI agents with sandboxed tool execution, and rootless Android system utilities. Whether shipping a commercial storefront or a low-overhead mobile tool, I prioritize explicit architecture, modular separation, and verifiable behavior over quick prototypes.
| Language | Role & Production Usage |
|---|---|
| TypeScript / JavaScript | Primary stack for full-stack web apps, React Native mobile apps, Node.js runtimes, and CLI tool-calling agents |
| Kotlin | Native Android engineering with Jetpack Compose, system overlays, and Shizuku IPC integrations |
| Python | Automation pipelines, local voice/AI tooling, CLI utilities, and security scripting |
| SQL | Relational schema design, PostgreSQL Row-Level Security (RLS) policies, and embedded SQLite persistence |
| Bash / Shell | Linux environment administration, build automation, and GitHub Actions CI/CD workflows |
| Domain | Technologies & Patterns |
|---|---|
| Frontend & Web | Next.js, React, Astro, Tailwind CSS, HTML5 / CSS3 |
| Backend & Data | Node.js, PostgreSQL, Supabase (Auth & RLS), SQLite, Cloudinary CDN |
| AI & Agent Systems | Function/Tool Calling, Multi-Provider Routing & Quota Fallback, Approval Gates, Sandboxed Execution |
| Mobile & Systems | Jetpack Compose, React Native, Expo, Android (Shizuku IPC) |
| CI/CD & Tooling | Git, GitHub Actions, Vercel, Netlify, Linux |
1. Synsorempire — Production E-Commerce & Admin Platform
Live: synsorempire.vercel.app · Stack:
TypeScriptNext.jsReactTailwind CSSSupabaseCloudinaryVercel
Live online storefront built for a commercial fashion brand with a private inventory management dashboard and WhatsApp checkout workflow.
- Access Control: Enforced database-level isolation using Supabase Authentication and PostgreSQL Row-Level Security (RLS).
- Media Pipeline: Automated responsive image resizing and delivery via Cloudinary CDN.
- Release Hygiene: Configured GitHub Actions CI pipelines to enforce type-checking on every push.
2. JOEBOT — Sandboxed Terminal AI Agent
Source: github.com/JoeBuildsThings/joebot · Stack:
JavaScriptNode.jsMulti-LLM Routing
CLI engineering agent engineered around structured tool execution rather than a plain chat wrapper.
- Tool Runtime: Reads files, searches codebases, queries the live web, and executes shell commands.
- Execution Guardrails: Enforces human-in-the-loop approval prompts before file mutations or shell runs, blocks destructive command patterns, and sandboxes filesystem scope.
- Resilience: Routes requests across multiple AI providers with automatic failover on quota exhaustion, backed by persistent local memory.
3. GameDeck — Rootless Android Performance HUD & Optimizer
Source: github.com/JoeBuildsThings/gamedeck · Stack:
KotlinJetpack ComposeShizukuAndroid 10–14
In-game performance telemetry overlay and runtime profile manager requiring zero root access.
- Telemetry Overlay: Renders a live floating HUD tracking FPS, frame times, CPU load, RAM usage, and battery thermals.
- Safe Privilege Escalation: Uses Shizuku IPC for system-level tuning with one-tap reversible profiles and a hard-coded blocklist protecting core system packages.
4. Mono Tracker — Offline-First Habit & Routine Engine
Source: github.com/JoeBuildsThings/mono-tracker · Stack:
TypeScriptReact NativeExpoSQLite
Minimalist mobile habit tracker engineered for instant local reads/writes and deterministic streak calculation using embedded SQLite storage.
5. UNIOSUN CGPA Calculator — 5.0 Scale Academic Engine
Source: github.com/JoeBuildsThings/cgpa-calculator · Stack:
JavaScriptLocalStorage
Multi-semester GPA/CGPA computation utility built specifically for Osun State University's 5.0 grading system with persistent client-side state.
Other Public Repositories:
- Frost Music Player — Native Android audio player built in Kotlin
- Vibeo — Hybrid social feed and real-time messaging application
- Portfolio — Personal developer site built with Astro and Tailwind CSS (Live)
- JOEBOT v2: Refactoring the terminal UI, expanding tool integrations, and tightening sandbox boundaries.
- Local Inference: Benchmarking and running local language models via Ollama on constrained hardware.
- Security Engineering: Studying defensive security fundamentals toward ISC2 CC and CompTIA Security+.
- Client Engineering: Available for freelance backend, full-stack web, and AI workflow automation builds.
Send over project scope, technical requirements, and timeline:
