Available for Systems Architecture & Fractional CTO Roles

Principal Systems
Architect & High-Concurrency
Backend Engineer

13+ years building scalable multi-tenant SaaS platforms from the ground up — specializing in high-concurrency API ingestion pipelines, AWS cloud infrastructure, database optimization, and cross-functional technical leadership across fintech, e-commerce, and enterprise CRM domains.

13+
Years Experience
15+
Engineers Led
8yr
CTO Engagement
4+
SaaS Platforms Built

// proof of work

Architectural Case Studies

Real systems designed, built, and shipped under production load — from greenfield SaaS platforms to live financial exchange infrastructure.

Multi-Tenant SaaS CRM & ERP Platform
Node.jsRuntime
MicroservicesArchitecture
15-engTeam Led
AWS EC2/S3Infrastructure

Designed and built a complete multi-tenant SaaS CRM and ERP system from the ground up at Pronto Digitals — serving as sole technical decision-maker across the entire product lifecycle. Integrated AI-driven workflow automation modules, REST APIs, and GitLab CI/CD pipelines for high availability and minimal downtime.

Node.jsReact.jsMicroservicesAWS EC2S3CloudFrontDockerGitLab CI/CDAI Automation
📈
PSX Live Trading Platform
Real-timeData Feeds
HFTLoad

Sole developer responsible for building and upgrading a live trading platform integrated directly with the Pakistan Stock Exchange. Handled real-time data feeds, transaction processing, and platform stability under high-frequency trading loads using CodeIgniter backend.

PHPCodeIgniterWebSocketsMySQLReal-time APIs
🗂️
Internal Project Management CRM
10+Engineers
AgileSprints

Designed and built a custom Jira-like project management system to streamline task tracking, sprint management, and team collaboration across engineering and QA. Replaced a third-party tool dependency entirely with an internally-owned platform.

PHPMySQLReactREST APIAgile/Scrum
☁️
AWS Cloud Infrastructure & API Data Pipelines

Owned full AWS infrastructure architecture across multiple projects — EC2 compute clusters, S3 data stores, CloudFront CDN — containerized with Docker and deployed through CI/CD pipelines. Built custom RESTful APIs synchronizing data pipelines for inventory management and cross-border e-commerce at Boon Trading Netherlands.

Infrastructure Stack
AWS EC2S3CloudFrontDockerNginxGitLab CI/CDLinux
Data Layer
MySQLPostgreSQLRedisRESTful APIs

// zentiq labs & open source

Open Source & Product Suite

Packages, platforms, and tools built for the developer community — production-grade, performance-first.

laravel-fast-pdf
Zentiq Labs · Packagist
PHP

High-performance PDF generation library for Laravel applications. Designed for speed and minimal memory overhead, enabling server-side document generation at scale without sacrificing reliability.

Laravel Package
Composer
MIT License
Zento AI
Zentiq Labs · SaaS Product
SaaS

AI-powered workflow automation platform for business teams. Integrates AI-driven modules into core productivity features, delivering data-driven insights and automating repetitive operational tasks.

AI / LLM Integration
REST API
OmniDesk Platform
Zentiq Labs · Enterprise
Enterprise

Multi-tenant customer engagement and support platform. Architected for high availability with microservices patterns, Redis caching layers, and real-time WebSocket communication channels.

Multi-tenant
WebSockets
Redis
ZentiqSign Engine
Zentiq Labs · Document Layer
SaaS

Digital document signing engine with cryptographic verification, audit trails, and compliance features. Integrates with existing SaaS platforms via RESTful API and supports offline SQLite fallback for field operations.

Cryptographic Signing
SQLite Fallback
API-first
PrestaShop Custom Modules
Boon Trading · E-Commerce
PHP

Architected and deployed custom PrestaShop modules and core overrides for Boon Trading Netherlands — handling cross-border inventory pipelines, AWS API integrations, and performance-tuned storefronts at scale.

PrestaShop Core
AWS Sync
B2B E-Commerce
Shopify / WP Integrations
Nart Solutions · Plugins
Integration

Custom WordPress plugins, Shopify solutions, and integrated payment gateway connectors (UPS, FedEx, Ecwid) alongside VoIP/CRM tool integrations built for enterprise client platforms.

WordPress
Shopify
Payment APIs

// track record

Engineering Career Timeline

13+ years of progressive technical leadership — from hands-on full-stack engineering through platform architecture and executive CTO roles.

Lead PHP & PrestaShop Developer Boon Trading Netherlands B.V. Apr 2025 – Aug 2026 · Remote
  • Managed and updated core PHP and PrestaShop source code across all company e-commerce properties, ensuring high availability and secure transactions.
  • Architected and deployed custom modules, platform capabilities, and backend features to support international business growth.
  • Built and maintained custom RESTful APIs connected to AWS cloud services for synchronized data pipelines and inventory management.
  • Collaborated with overseas directors and stakeholders to execute technical deliverables and resolve complex production issues.
Head of Department / CTO Pronto Digitals Apr 2022 – May 2026 · Karachi
  • Designed and built a multi-tenant SaaS CRM and ERP platform from the ground up using Node.js, React.js, and microservices — sole technical decision-maker across the entire product lifecycle.
  • Recruited, structured, and led a 15-person cross-functional team of engineers, UI/UX designers, and QA specialists running Agile sprints and code reviews.
  • Integrated AI-driven automation modules and REST APIs into core platform features, improving workflow efficiency and delivering data-driven client insights.
  • Owned full AWS infrastructure (EC2, S3, CloudFront), containerized via Docker and deployed through GitLab CI/CD pipelines for minimal downtime.
Chief Technology Officer (Consulting) Skills Tech Inc Feb 2017 – Feb 2025 · Karachi
  • Directed technical vision and platform strategy for complex e-commerce, web, and custom application projects across an 8-year consulting engagement.
  • Architected and built the company's entire technical infrastructure from the ground up — cloud hosting, CI/CD pipelines, database design, and API systems.
  • Recruited and mentored a developer team, establishing engineering best practices across database optimization, API design, and cloud infrastructure.
  • Acted as primary liaison between business stakeholders and technical execution, aligning technology initiatives with revenue and growth objectives.
Head of Department Nart Solutions Feb 2020 – Mar 2022 · Karachi
  • Directed technical strategy, AWS infrastructure implementations, and software development lifecycles for client enterprise platforms.
  • Developed custom WordPress plugins, Shopify solutions, and integrated payment gateways (UPS, FedEx, Ecwid) alongside VoIP/CRM tools.
  • Oversaw departmental budgeting, staff recruitment, technical training, and SLA performance management.
Team Lead Quad Tech Pvt Ltd Jan 2019 – Jan 2020 · Karachi
  • Hands-on development of SaaS-based platforms alongside day-to-day team leadership of 10+ software engineers.
  • Designed and built an internal project management CRM — a custom Jira-like system — to streamline task tracking, sprint management, and team collaboration.
  • Supervised Agile sprint cycles, conducted code reviews, and ensured on-time delivery of technical projects.
Webmaster / PHP Backend Developer The Financial Square Feb 2017 – Dec 2019 · Karachi
  • Sole developer responsible for building and upgrading a live trading platform integrated directly with the Pakistan Stock Exchange, handling real-time data feeds and transaction processing.
  • Architected and maintained custom backend systems using CodeIgniter, ensuring stability and performance under high-frequency trading loads.
  • Independently managed the entire development lifecycle — requirements gathering, system design, deployment, and ongoing maintenance.
Web Developer – PHP WebEmax Jun 2015 – Jan 2017 · Karachi
  • Designed and developed custom websites and web applications across multiple industries, delivering pixel-perfect front-ends with robust PHP backends.
  • Built custom PHP CMS platforms and managed ongoing WordPress and Joomla portals.
Web Developer / Team Lead F-Tech Solutions Oct 2013 – Jun 2015 · Karachi
  • Designed and developed full-cycle websites and web applications — from UI design through backend development and deployment.
  • Supervised and mentored junior engineers, conducting code reviews and ensuring delivery quality across client projects.

// technical capabilities

Technology Stack Matrix

A categorized view of the tools, languages, and platforms used across 13+ years of production engineering.

Backend & Systems
Node.js PHP 8 Laravel Symfony CodeIgniter Express.js RESTful APIs WebSockets Microservices GraphQL
Frontend Architecture
React.js TypeScript JavaScript ES6+ Tailwind CSS AngularJS HTML5 CSS3 Next.js
Database & Caching
MySQL PostgreSQL Redis SQL Server SQLite Database Optimization Query Tuning Schema Design
DevOps & Cloud
AWS EC2 AWS S3 CloudFront Docker Nginx Linux Sysadmin CI/CD Pipelines GitLab CI GitHub Actions Git
E-Commerce, CMS & Platforms
PrestaShop Custom Modules & Overrides Shopify WordPress Joomla WooCommerce Payment Gateways UPS API FedEx API

// initiate contact

Let's Build Something

Ready to architect your next system?

Available for systems architecture consulting, fractional CTO engagements, and senior backend engineering roles. Response within 24 hours.

Phone
+92 331 308 8018
GitHub
github.com/ctousman
LinkedIn
linkedin.com/in/ctousman
✓ Message queued — will respond within 24 hours.