Onimisea is Ahmed Tijani's personal engineering brand for secure, scalable, accessible, high-performance software systems and AI-native products. I help remote teams, founders, and businesses turn product ambiguity into maintained production systems.
I own full delivery: schema design, backend APIs, frontend systems, AI integration, production deployment, and ongoing security hardening.
I design and build complete systems from data schema through deployed UI. You get a production-ready product engineered to scale — not a prototype or a patched stack of vendor tools.
RAG pipelines, vector search with pgvector and HNSW, LLM orchestration, agentic workflows, and async ingestion via Celery. AI that solves real problems in production.
Secure, scalable Python/Django REST APIs for fintech, SaaS, and platform products. Payments, authentication, RBAC, KYC validation, audit trails, and async processing built production-ready from day one.
React and Next.js TypeScript systems built for real users under real load. Financial dashboards, transaction workflows, complex data tables, responsive component systems, and accessibility-first design.
I wire security into every layer: HttpOnly cookie auth, device fingerprinting, login-attempt monitoring, XSS/CSRF prevention, input validation, KYC integration, and full security event audit trails.
CTO-level technical leadership available as a contractor. I review architecture decisions, define engineering standards, unblock teams, and translate business goals into systems that ship and scale.
Every engagement is backed by shipped code, real users, and business impact you can trace directly to engineering decisions.
Designed and built the entire Accessivo fintech platform as the sole engineer — from database schema through deployed UI. The platform went from zero to 6,700+ onboarded users processing over ₦35M in transaction volume within weeks of launch.
Architected secure frontend systems across Business, Talent, and Admin products. Built scalable dashboards for high-volume financial data with payout, reconciliation, and transaction workflows.
Shipped weekly features on a Django and React platform for agent workflow management. Integrated AI sentiment analysis, automated reporting pipelines, and role-specific dashboards for Admin, Customer, and Agent users.
Built order management, inventory, and procurement REST APIs with JWT authentication, multi-tier RBAC, order tracking, and a full supply-chain frontend using Next.js and TailwindCSS.
Built payment processing and blockchain transaction APIs with webhook systems for async blockchain events, middleware audit logging, and real-time merchant analytics and transaction dashboards.
Built the backend and frontend for an integrated e-learning, jobs, and community platform serving African professionals — covering course delivery, quiz systems, certification workflows, a job board, and community forums.
Beyond client work, I'm the founder building the Onimisea product ecosystem. Onimisea Group is the future holding company for these products.
Fashion business management platform for Nigerian bridal, asoebi, menswear, and bespoke brands. Replaces measurement books and scattered WhatsApp follow-ups with digital client profiles, a measurement vault, consultations, order tracking, invoices, transactions, payment reminders, messaging, and a branded customer portal, with AI-assisted operations planned next.
AI-powered learning platform and AI copilot for mastering any subject. Five-level explanation depth, RAG pipelines over academic content, credit-based billing, integrated assessment workflows, and async ingestion built around production-grade learning systems.
Civilian safety and emergency response product for live/real-time geolocation tracking, offline and last-known location continuity when registered devices are unavailable, emergency alerts to law enforcement agencies, and rescue-team coordination workflows.
AI-infused algorithmic trading operating system. Strategy versioning, signal generation, risk decision engine, walk-forward backtesting, and a self-improving AI engine that evaluates, hypothesises, and iterates on trading strategies autonomously in production.
The delivery model is structured around product clarity, architectural judgment, secure execution, and long-term operational ownership.
I don't just know these tools theoretically; every item below has shipped in a production system under real load with real users.
Companies do not need another generic developer profile. They need someone who understands business constraints, technical debt, security boundaries, delivery pressure, and how to turn product ambiguity into a maintainable system.
I'm Ahmed Tijani, the engineer behind the Onimisea personal brand. I've spent 7+ years building production systems across fintech, e-learning, supply-chain, Web3, and SaaS platforms.
I don't separate "technical" from "business." Every architecture decision, every API contract, every deployment choice is made in service of a measurable outcome. At Accessivo, I was the sole engineer who took a fintech product from zero to 6,700+ users processing ₦35M+ in transactions. That's what full ownership means.
Currently building Onimisera, an AI-native learning platform for Nigerian university students, while actively available for remote engineering and consulting roles globally.
Remote engagement