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Hello there,Welcome to my world

Bernard Tay

Bernard Tay

Backend & Applied AI Software Engineer building reliable systems for real products

I design reliable backend systems and integrate AI to power real web and mobile products — from workflows and automations to AI-driven features.

I work with startups and businesses in logistics, fintech, education, and marketplaces to build production-ready software. My focus is on backend systems — authentication, payments, workflows, scalability, and security — with the ability to deliver complete products through clean web and mobile interfaces.

I care less about hype and more about systems that work.

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Trusted By

Systems in production for growing companies

Atmostech Solutions
Ebus Holdings
Thoughtful
Ophunter
Panda Logistics
FleetTracker
EduHub
PayFlow
MediSync
DataCore
Atmostech Solutions
Ebus Holdings
Thoughtful
Ophunter
Panda Logistics
FleetTracker
EduHub
PayFlow
MediSync
DataCore

About

What I Do

Backend Systems & Architecture

Designing scalable backend systems, data models, and service boundaries that support long-term product growth.

APIs, Auth & Core Infrastructure

Building secure APIs, authentication flows, role-based access, and core infrastructure that products depend on.

Applied AI & Intelligent Workflows

Integrating AI into backend systems to automate decisions, process data, and power intelligent product features.

Product & Platform Delivery

Shipping complete systems by connecting backend services to web and mobile applications with clarity and intent.

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

Backend

Node.jsPythonPostgreSQLMongoDBGraphQL

Infrastructure

AWSDockerKubernetesGitLinux

Web & Mobile Delivery

ReactNext.jsTypeScriptTailwind CSSReact NativeFlutterSwiftKotlinFirebase

Selected Systems

Backend-first systems I've designed and built — with web and mobile interfaces consuming these APIs.

PrepMaster.ai

An AI-powered learning platform that converts academic content into personalized practice, feedback, and progress tracking for students.

Core System Responsibilities

  • AI-driven content transformation & evaluation workflows
  • Progress tracking, scoring logic & adaptive learning rules
  • Secure user management and usage-based feature limits

Interfaces Consuming the System

  • Web app for students and educators
  • Admin tools for content and usage monitoring

Backend Stack

TypeScriptNext.js APIPostgreSQLAI APIs

Outcome: Helped students study more efficiently by turning static course material into interactive, guided learning experiences.

LiveCodeDemo

Panda Logistics

A peer-to-peer logistics backend that matches travelers with delivery requests while enforcing trust, availability, and pricing constraints.

Core System Responsibilities

  • Real-time booking and matching engine
  • Availability, routing, and conflict resolution logic
  • Verification, role-based access, and dispute handling

Interfaces Consuming the System

  • Mobile app for senders and travelers
  • Admin dashboard for oversight and resolution

Backend Stack

Node.jsTypeScriptPostgreSQLWebSockets

Outcome: Reduced failed handoffs and improved delivery reliability by structuring trust and coordination into the system.

LiveCodeDemo

GIGA — Labour Force Management

A workforce management platform that allows businesses to instantly deploy, track, and pay short-term workers for operational tasks.

Core System Responsibilities

  • Shift scheduling, task assignment, and payout logic
  • Worker reliability scoring and incentive systems
  • Business-facing controls for demand and workforce quality

Interfaces Consuming the System

  • Business dashboard for shift creation and tracking
  • Worker mobile app for availability and task execution

Backend Stack

TypeScriptFastAPIPostgreSQLReact Native

Outcome: Enabled businesses to scale short-term labor efficiently without operational chaos or payment delays.

LiveCodeDemo

How I Help Teams Build Reliable Products

I focus on backend systems first — and deliver web and mobile interfaces where they matter.

Core Offering
Backend Systems Engineering

Design and implementation of reliable backend systems that power real products — from data models to core business logic.

From $800 • 3–6 weeks
  • Domain & data model design
  • API & service architecture
  • Authentication & permissions
  • Business rules & workflows
  • Performance & reliability planning
  • Security-first implementation
Product Delivery (Web & Mobile)

Web and mobile applications built to consume and validate backend systems — focused on usability, not vanity UI.

From $600 • 2–4 weeks
  • Web dashboards & admin panels
  • Mobile apps consuming backend APIs
  • Offline & sync-aware interfaces
  • Role-based UI flows
  • Performance-conscious frontend architecture
SaaS & Platform Architecture

End-to-end architecture for multi-tenant platforms, internal tools, and revenue-generating systems.

From $3,500 • 6–12 weeks
  • Multi-tenant system design
  • Subscription & billing logic
  • Scalable auth & access control
  • Operational dashboards
  • Deployment & environment strategy
Technical Consulting & System Reviews

Senior-level guidance to help teams and founders make better architectural and technical decisions.

$30/hour • Flexible
  • Architecture & system audits
  • Backend & API reviews
  • Scalability & risk assessment
  • Technical roadmap planning
  • Founder & team mentoring
Not sure what you need yet? Most clients start with a system review before committing to build.

What Clients Say About My Systems

I focus on building backend-first systems with web & mobile delivery. Here's what clients highlight about working with me.

"Bernard architected a fintech backend that processes thousands of secure transactions daily. His system design ensured scalability, compliance, and reliability from day one."

SC
Sarah Chen
CEO, TechFlow Solutions
Fintech Startup

"Bernard delivered a robust multi-tenant system powering our EdTech platform. His backend and API strategy enabled real-time student tracking at massive scale."

MR
Marcus Rodriguez
CTO, EduVision
EdTech Platform

"He built the entire backend architecture and integrated web & mobile clients, allowing us to scale our SaaS platform 300% within a year."

EW
Emily Watson
Founder, CloudSync Pro
SaaS Company

"Bernard designed the backend analytics engine that powers our dashboards, giving actionable insights to 10,000+ daily users."

DK
David Kim
Product Manager, RetailHub
E-commerce

"Bernard implemented a HIPAA-compliant backend for our health platform, ensuring secure mobile access for caregivers and patients."

LT
Lisa Thompson
Director, HealthTech Innovations
Healthcare

"Bernard engineered a high-frequency trading backend capable of processing millions of transactions securely, with full audit and monitoring capabilities."

JW
James Wilson
VP Engineering, CryptoTrade
Cryptocurrency
50+
Systems Delivered
8
Industries Served
120+
APIs Built
8+
Years Backend Experience

Work With Me

What I Offer

I work with teams and founders who need backend systems designed, built, or audited. This includes:

  • Backend system design and architecture review
  • End-to-end backend implementation
  • Ongoing technical advisory for backend decisions

Engagements focus on outcomes and trust, not task lists or hourly tracking.

Next Project Window

Accepting backend and full-stack projects for Q2 2026. Let's architect scalable systems together.

Currently accepting projects

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