Hello there,Welcome to my world
Bernard Tay
Full-Stack Engineer. AI-Native Builder.
I design and ship complete product stacks — React/Next.js frontends, Node.js/Python backends, and AI layers built for production. RAG pipelines, LLM agents, third-party integrations. 4+ years. 1,000+ active users. Systems that work.
Trusted By
Systems in production for growing companies
About
What I Do
Full-Stack Product Engineering
End-to-end product development — from database schema and API design to React/Next.js interfaces. I own the full stack.
AI Integration & GenAI Features
RAG pipelines, LLM agents, workflow automation, and AI-powered product features using LangChain, Claude API, and Gemini — shipped to production users.
API Design & Third-Party Integrations
REST and event-driven APIs, authentication systems, and complex data synchronisation with third-party platforms including ATS systems, CMS platforms, and payment providers.
Frontend Architecture & UX
Performant, accessible React/Next.js applications with SSR/ISR, App Router, component libraries, and a strong eye for user experience and interface quality.
Background
I started as a computer science student and have spent the last four years building systems for fintech, edtech, and SaaS companies. My work has evolved from simple web applications to architecting backend systems that handle high-volume customer operations.
I focus on creating scalable solutions that connect technology decisions to business outcomes. My approach centers on correctness, clear component boundaries, and systems designed for real-world usage and failure.
Outside of client work, I contribute to open-source projects, mentor developers, and build tools to address problems in my community.
Technical Stack
AI / GenAI
Backend
Infrastructure
Web & Mobile Delivery
Selected Systems
Backend-first platforms I've designed and built — with web and mobile interfaces consuming these APIs.
An AI-powered learning platform that converts academic content into personalized practice, feedback, and progress tracking for students.
Core System
- AI-driven content transformation & evaluation workflows
- Progress tracking, scoring logic & adaptive learning rules
- Secure user management and usage-based feature limits
Interfaces
- Web app for students and educators
- Admin tools for content and usage monitoring
Outcome: Helped students study more efficiently by turning static course material into interactive, guided learning experiences.
View case studyPanda Logistics
A peer-to-peer logistics backend that matches travelers with delivery requests while enforcing trust, availability, and pricing constraints.
Core System
- Real-time booking and matching engine
- Availability, routing, and conflict resolution logic
- Verification, role-based access, and dispute handling
Interfaces
- Mobile app for senders and travelers
- Admin dashboard for oversight and resolution
Outcome: Reduced failed handoffs and improved delivery reliability by structuring trust and coordination into the system.
View case studyGIGA — Labour Force Management
A workforce management platform that allows businesses to instantly deploy, track, and pay short-term workers for operational tasks.
Core System
- Shift scheduling, task assignment, and payout logic
- Worker reliability scoring and incentive systems
- Business-facing controls for demand and workforce quality
Interfaces
- Business dashboard for shift creation and tracking
- Worker mobile app for availability and task execution
Outcome: Enabled businesses to scale short-term labor efficiently without operational chaos or payment delays.
View case studyOpHunter
An AI-powered opportunity marketplace that connects students with personalised scholarships, grants, and programmes using a RAG pipeline over curated opportunity data.
Core System
- RAG pipeline with LangChain and Supabase Vector store
- Personalised search and recommendation engine
- Secure user management and opportunity ingestion workflows
Interfaces
- Web app for students to discover and apply for opportunities
- Admin dashboard for opportunity curation and analytics
Outcome: 60% improvement in platform performance and a personalised search experience that surfaces relevant opportunities for each student.
View case studyClientOrbit
A full-stack freelance management SaaS with project tracking, invoicing, and client portal features for independent professionals.
Core System
- Project lifecycle management and milestone tracking
- Invoice generation, payment status tracking, and billing logic
- Client portal with role-based access and shared project views
Interfaces
- Freelancer dashboard for projects and invoices
- Client-facing portal for progress visibility and approvals
Outcome: 50+ active users with 95% client satisfaction. Reduced invoicing overhead for freelancers by centralising client communications.
View case studyLive AI Demo
See AI Integration In Action
Ask anything about my work, stack, or experience — powered by Claude
What I Build For Founders
Fixed-scope projects with clear deliverables. You know exactly what you're getting before we start.
MVP Build
Go from idea to working product
A deployed, functional prototype built around your core user flow. Enough to validate, demo to investors, or onboard your first users — without scope creep.
Best for: Founders validating an idea or preparing a demo
- Auth system (email, OAuth, or magic link)
- Core database schema & REST API
- Single primary user flow — end to end
- Web interface (Next.js / React)
- Deployed to production (Vercel / Railway / DO)
Full-Stack Product Build
A complete, shippable product
End-to-end product engineering — backend systems, web or mobile interface, third-party integrations, and an admin panel. You ship something real to real users.
Best for: Startups building their first production product
- Full backend: database, API, auth, role management
- Web dashboard or mobile app
- Payments (Stripe / Paystack / Flutterwave)
- Third-party integrations (email, SMS, file storage)
- Admin panel for operations and oversight
- Deployment, CI/CD, and environment setup
Marketplace & Platform
Multi-sided platforms with real business logic
Complex, multi-role platforms — marketplaces, SaaS products, workforce tools. Systems with matching logic, subscription billing, real-time features, and the operational infrastructure to run them.
Best for: Founders building a marketplace or SaaS product
- Multi-role system (buyers, sellers, workers, admins)
- Matching, booking, or assignment engine
- Subscription billing & payment splits
- Real-time features (WebSockets / live updates)
- Trust & reputation systems
- Operational dashboard & analytics
- Deployment, monitoring & scale planning
AI Feature Integration
Add intelligence to your product
LLM-powered features integrated into new or existing products. RAG pipelines for intelligent search, AI agents for workflow automation, or conversational interfaces — shipped to real users.
Best for: Products that need intelligent search, automation, or a chat interface
- RAG pipeline (LangChain + vector database)
- LLM integration (Claude API / GPT-4o)
- Prompt engineering & evaluation
- AI-powered search or recommendation layer
- Workflow automation with LLM decisions
- Caching & cost optimisation strategy
Technical Advisory & Consulting
Architecture reviews, system audits, and technical strategy sessions. For employment enquiries (contract or full-time), email directly.
$80/hour
Min. 1-hour session
Not sure which fits? Start with a free 30-minute scoping call — I'll tell you exactly what your project needs. Get in touch
Work With Me
What I Offer
I work with teams and founders who need complete product stacks designed, built, or scaled. This includes:
- Full-stack product engineering — frontend, backend, and AI layers
- Third-party API integrations, ATS/CMS platforms, and payment systems
- Applied AI features — RAG pipelines, LLM agents, and workflow automation
- Technical advisory and architecture reviews for engineering teams
Engagements focus on outcomes and trust, not task lists or hourly tracking.
Next Project Window
Accepting full-stack and AI engineering projects for Q3 2026. Open to contract, part-time, or full-time remote roles.