Ruby on Rails Developer in Pakistan

Available now, Senior Rails / Full-Stack roles · Remote in any timezones or hybrid / onsite in Pakistan

Zia Ur Rehman

Full-Stack Ruby on Rails Engineer + React engineer. I ship multi-tenant SaaS, real-time integrations, and AI pipelines end-to-end, production-grade, not prototypes.

4+ years across Communications, RealEstate, HealthCare, E-commerce, Travel SaaS, and Saudi software escrow. Remote with US, UAE, and KSA teams. Strong in performance work, ActionCable / Turbo real-time, and complex integrations (HL7, Experian, RingCentral, AMS360, EPIC, Shopify). Pair daily with Claude / Codex to ship faster without cutting corners.

Independently shipped three AI-native production builds: Escrow.sa (KSA software escrow on Rails 8), AgencyPortal (multi-tenant travel SaaS, 12 supplier portals via scripted Selenium), and Yushas Collection (Rails 8 storefront).

Hire Me Resume Email WhatsApp

4+

Years senior full‑stack

77%

Memory cut on legacy PDF system

12

Supplier portals unified behind one layer

~50%

Manual effort cut via AI call pipeline

Currently Working On

AgencyPortal

Multi-tenant Umrah travel SaaS, scripted Selenium logins against 12 supplier portals, booking flows, per-agency analytics. Live at hasnaintravel.com.

Yushas Collection

Greenfield Rails 8 storefront for a Pakistani unstitched-fabric brand, catalog, theming, full order lifecycle (bank transfer + COD), admin-managed homepage blocks. Live at yushascollection.com.

Achievements

Senior Software Engineer | Lahore, Pakistan – Hybrid

Devsinc, Full-Stack Engineer staffed across US and global client engagements

June 2022 – Present

Show 2 achievements

Full-Stack Engineer (via Devsinc) | California – Remote

Ecolink – Communication Platform for Insurance Agencies

Feb 2025 – Apr 2026

Show 6 achievements

Forged an AI call pipeline that converts audio into transcripts and summaries via an internal AI microservice with live ActionCable updates, reducing manual effort by ~50%.
Productionized Inteveo IQ, an AI-driven Priority Task Board that turns each transcribed call into prioritized actionable items (Growth / Maintenance / Relationship) with sentiment scoring and AI insights, boosting agent follow-up efficiency by ~90%.
Composed multi-tenant real-time call, SMS, and chat workflows using ActionCable, WebSockets, and Turbo Streams for insurance agencies.
Integrated RingCentral, AMS360, and Applied EPIC into a unified communication and compliance platform.
Rolled out a Slack reporting bot (PDF/CSV) that automated bi-weekly usage reports and cut manual reporting effort by ~80%.
Delivered a RingCentral Call Analytics Reporting Module with scheduled SendGrid email delivery, downloadable PDF reports, saved schedule views, and an aggregation service for daily/bi-weekly call metrics.

Software Engineer (via Devsinc) | Wilmington – Remote

SaaS LTV Growth – E-commerce Revenue Optimization

Nov 2024 – Feb 2025

Show 4 achievements

Migrated key REST endpoints to Shopify GraphQL and added GitHub Actions CI/CD, reducing server load by ~36% and speeding releases.
Optimized Redis-backed background jobs to eliminate N+1 queries, improving overall resource utilization by ~43%.
Improved storefront performance by reducing LCP by ~72% via Redis caching and backend query tuning, and built subscription workflows that stabilized recurring revenue.
Owned product customization workflows (engraving, swatches, image uploads), improving customer engagement by ~37% and boosting merchant revenue.

Full-Stack Engineer (via Devsinc) | Texas – Remote

Intellirent – Real Estate & Rental Marketing

Jan 2023 – Dec 2024

Show 7 achievements

Revamped a 10-year legacy PDF system in Rails, reducing memory allocations by 77% and execution time by 63% (Scout APM).
Integrated Experian-based fraud and identity checks, reducing manual verification time by roughly 90%.
Redesigned the React + GraphQL front-end, cutting API load by ~40% and improving responsiveness by ~55%, while DRY refactors delivered ~33% performance gains and lower server costs.
Engineered containerized microservices with AWS Lambda and Docker, cutting infrastructure costs by ~27% while enhancing scalability and deployment speed.
Restructured relational schemas with ActiveRecord, resolving memory issues (~23% improvement) while ensuring ACID compliance.
Enhanced frontend performance by ~15% via asset bundling and font caching.
Accelerated debugging by ~50% using structured logging and real-time monitoring tools such as Papertrail and Airbrake.

Software Engineer (via Devsinc) | Singapore – Remote

Biomark – Healthcare Connectivity Platform

June 2022 – Jan 2023

Show 6 achievements

Developed HIPAA-aware data pipelines using HL7 APIs for secure data exchange between labs, doctors, and patients.
Drafted modular microservice-style components and automated onboarding flows, boosting developer efficiency by ~30%.
Helped establish a scalable Rails API architecture with clear separation of concerns and security in mind.
Orchestrated secure backend workflows for patient-doctor-lab coordination, improving reliability and real-time data availability across systems.
Optimized background processing and operational workflows with Sidekiq and CI/CD practices to improve release consistency.
Collaborated with cross-functional teams to ship compliant healthcare features while maintaining delivery velocity.

AI-Native Projects

Independent, AI-assisted builds shipped end-to-end, architecture, code, deploy. Pairing daily with Claude / Codex to ship production systems faster without cutting corners.

Full-Stack Engineer | Riyadh – Remote

Escrow.sa, Software Escrow Platform for the Saudi Market

Visit live

Show 8 highlights

Architected a tri-party software escrow platform on Rails 8 + Hotwire with bilingual Arabic/English UI and full RTL support.
Bootstrapped a Rails 8 platform that securely holds vendor source code and releases it to beneficiaries only when legally defined release conditions are approved.
Engineered an encrypted Forgejo Vault for source-code deposits with SHA-256 integrity checks and a senior-engineer manual review workflow.
Implemented a senior-engineer manual verification workflow where each deposit is downloaded, set up, run, reviewed, and approved before being marked as verified.
Designed a multi-stage release-approval pipeline (moderator → lawyer → super admin) using AASM state machines and PaperTrail audit trails.
Crafted multi-portal access for platform staff, vendors, and beneficiaries with role-based authorization using action_policy.
Added per-agreement encrypted environment variables so moderators can securely access the secrets needed to verify deposited software.
Provisioned the platform inside the KSA data-residency zone with KMS-backed per-agreement encryption and append-only audit logs on a separate database.

Founder · Lead Engineer | Self-directed

AgencyPortal, Multi-Tenant SaaS for Umrah Travel Agencies

Visit live

Show 7 highlights

Launched a branded agency platform that unifies live inventory and bookings from 12 supplier portals into one customer-facing interface.
Pioneered a multi-tenant Rails 8 SaaS end-to-end with custom-domain → subdomain → apex tenant resolution and Pundit RBAC across super_admin / admin / agent roles.
Implemented per-agency landing pages, custom domains, markup pricing, hold timers, auto-cancel flows, and booking lifecycle management.
Authored a portal-integration layer with scripted logins and data fetchers against 12 supplier portals (cookie sessions, JWT SPAs, TOTP-secured Selenium flows) behind common Fetcher / Booker / SessionManager services.
Mapped a booking state machine with audience-aware hold timers and a double-entry ledger that stacks per-agent and per-portal markups on confirm.
Streamed Hetzner + Cloudflare metrics into the admin dashboard with threshold-based alerts so CPU, egress, and R2 limits surface before customers notice.
Deployed to Hetzner Cloud with Caddy (on-demand TLS for tenant domains), Cloudflare R2 storage, and nightly encrypted PostgreSQL backups.

Founder · Lead Engineer | Self-directed

Yushas Collection, Rails 8 Storefront for Pakistani Unstitched Fabric

Visit live

Show 6 highlights

Stood up a greenfield Rails 8.1 storefront end-to-end on PostgreSQL 18 multi-DB (primary / cache / queue / cable) with Hotwire (Turbo + Stimulus) and Tailwind v4, zero Node toolchain via importmap-rails.
Modeled the full catalog domain, Category, Collection, Product, ProductVariant, ProductPhoto, with admin-side photo↔color binding and nested-form Stimulus controllers for variant management.
Shipped a complete order lifecycle for the local market: bank transfer + cash-on-delivery (no payment gateway), confirm → ship → mark_delivered → cancel state transitions.
Themed the storefront via SiteSetting (colors, fonts, contact, shipping) plus data-driven homepage blocks (Banner, HomepageSection) so the brand can re-skin without code changes.
Added rich-text editing on every body field via ActionText, PDP lightbox with full photo navigation + mobile swipe, and a storefront perf pass (fragment cache, Thruster + Puma tuning, font trim).
Wired Solid Queue / Solid Cache / Solid Cable on PostgreSQL, zero Redis dependency, and deployed live on yushascollection.com via Kamal with Caddy TLS.

Services

Practical engineering help, from greenfield builds to surgical fixes on systems already in production.

Custom Web Development

Take your idea from a blank page to a live, working product, design, build, and deploy handled end to end so you can focus on your customers, not the plumbing.

From first sketch to live website
Built for your business, not a template
Handed over running, with you in control

Performance Improvement

Your site or app feels slow? I find what is actually causing it and make it faster, with clear before-and-after numbers so you can see the difference.

Faster page loads for your users
Lower hosting bills and crashes
Honest before-and-after results

Bug Fixes & Incident Triage

Something broken in production? I jump in, find the real cause, ship a clean fix, and leave behind a safety net so the same bug does not come back.

Quick response when things break
Real fix, not a patch on top of a patch
Safeguards so it does not return

Refactoring & Code Quality

Codebase getting scary to touch? I clean up the messy parts that slow your team down, so adding new features stops feeling risky.

Safer, easier-to-change code
Faster delivery for your team
Fewer surprises in production

API & Third-Party Integrations

Need your product to talk to payments, messaging, or partner systems? I wire it up so the data flows reliably and you do not lose anything in between.

Payments, messaging, partner systems
Reliable, retries on failure
Clear logs when something goes wrong

Migration & Modernization

Old app holding you back? I move it onto modern foundations without downtime, keeping all your data and customers right where they should be.

No downtime, no lost data
Lower running costs after move
Easier to maintain going forward

Code Review & Technical Audit

Inherited a project or vetting a team? I review the code and give you a clear, written report, what is solid, what is risky, and what to fix first.

Honest second opinion on your code
Risks ranked by what matters most
Plain-language report you can act on

AI-Native Feature Work

Want to add real AI features to your product? I build them so they are useful, safe, and predictable, not a science experiment that surprises your users.

AI features that actually help users
Costs kept under control
Safe, predictable behavior

Projects

Yushas Collection

E-Commerce · Pakistani Unstitched Fabric

Greenfield Rails 8 storefront for a Pakistani unstitched-fabric brand. Full catalog with collections, products, variants, and color-bound photos. Complete order lifecycle for the local market (bank transfer + cash-on-delivery), admin-themable storefront (colors, fonts, homepage blocks), product detail lightbox with mobile swipe, and a rich-text admin for every page. Live in production at yushascollection.com.

Ruby on Rails 8.1
Ruby 3.3
PostgreSQL 18
Hotwire (Turbo/Stimulus)
Tailwind v4
ActionText
+9

Escrow.sa

Software Escrow & Compliance (KSA)

Tri-party software escrow platform for the Saudi market, holds vendor source code in an encrypted vault, verifies each deposit via senior-engineer review, and releases code to beneficiaries only when legally defined conditions are met. Bilingual Arabic/English with full RTL and Saudi data residency.

Ruby on Rails 8
Hotwire
Turbo
Stimulus
Tailwind CSS
PostgreSQL
+13

AgencyPortal (AI Umrah Portal)

Travel SaaS · Multi-Tenant

A self-serve booking platform for Umrah travel agencies. Pulls live availability and prices from 12 different supplier systems into a single dashboard, lets each agency set its own pricing and branded landing page, manages bookings with automatic hold and cancellation timers, and surfaces system health alerts so issues are caught before customers notice. Live in production.

Ruby on Rails 8.1
Ruby 3.3
PostgreSQL (JSONB)
Hotwire (Turbo/Stimulus)
Tailwind v4
SolidQueue
+14

EcoLink

Insurance Communications

Cloud communications platform for insurance agencies that connects RingCentral with AMS360 and EPIC to unify calls, SMS, voicemail, and compliance logging.

Ruby on Rails
JavaScript
Slim
Turbo
ActionCable
PostgreSQL
+11

Intellirent

Real Estate & Rental Marketing

Paperless rental marketing and tenant screening platform used by residential leasing teams to collect applications, documents, and Experian-backed reports in one place.

Ruby
Rails
React
AWS (S3, EventBridge, Lambda)
JavaScript
Jira
+10

Mindrift (Tendem Data Collection)

AI Data Operations

Contributed to Tendem data collection by running web scraping/parsing workflows with Apify and delivering clean, structured datasets for AI tasks.

Apify
Web Scraping
Data Parsing
Data Validation
AI Data Collection
Quality Assurance

Revelo (Behavioral Data Annotation)

AI Model Quality

Worked on Behavioral Data - Architecture & Strategy Annotation, evaluating strategy-level responses with structured rubrics to improve consistency and quality.

LLM Evaluation
Behavioral Data Annotation
Quality Rubrics
Prompt Quality
AI Training

PC - Product Customization

SaaS & E-Commerce

Shopify app that lets merchants offer deep product customization (engraving, swatches, image uploads, pricing rules) with interactive visuals, boosting AOV and personalization.

Rails
PostgreSQL
Ruby
React
Shopify
Remix
+11

Biomark

HealthCare

Healthcare connectivity platform that keeps patients, doctors, and labs in sync through secure, HL7-powered data pipelines and dashboards.

Rails
Ruby
Docker
PostMan
Ngrok
Jenkins
+4

Local Serv

AI Automation

AI-powered service marketplace built with Databutton that lets customers book local services (car wash, home renovation, etc.) via conversational AI flows.

Prompt Engineering
Generative AI
Databutton
OpenAI GPT
API Integrations
Rapid Prototyping
+3

Testimonials

What my colleagues and peers say about working with me.

I had the pleasure of working with Zia and can confidently say he is one of the most reliable and supportive engineers on a team. He is the kind of person who n…

Salman Saeed

Ruby on Rails · Hotwire · Django · React · AWS (Co‑founder cto.sa)

I’ve had the chance to work with Zia, and it’s been an absolute pleasure. He is smart, reliable, and just genuinely great to work with. Whether it’s solving tou…

Rabbiya Noor

Software Engineer | ROR | React

I managed Zia Ur Rehman and worked closely with him on real production features. He’s a reliable full-stack developer who consistently delivers solid work using…

Azan Arif

Mob / Web / Application Development · AWS

Zia was a QA's dream at Intellirent. His clean Ruby on Rails code simplified test automation, while his robust RESTful APIs reduced edge cases by 40%. By modern…

Abdul Wahab

Programme Officer · QA / UAT / Business Analysis

I highly recommend Zia ur Rehman as an excellent developer and a true team player. He consistently delivers high-quality work, approaches problems with a strong…

Muhammad Ali Raza

Software Engineer · Full Stack (Nuxt/Next/Node/Nest)

Zia Ur Rehman was an amazing colleague, and person! He is very motivated and hard working and inspires the team. Zia has consistently overachieved his targets. …

Ali Raza Khan

SSE - Full Stack | Node.js | AWS

Skills

Honest tiers, not a logo soup. Tap any skill to see where it's been used.

Daily — primary stack on live products Production — shipped in at least one project Fluent — working knowledge, not currently in production

Languages

Ruby

Used in: Escrow.sa, AgencyPortal, EcoLink, Intellirent, PC - Product Customization, Biomark

Frameworks & Libraries

Databases

Cloud & DevOps

Tools & APIs

Work Experience

Devsinc

Senior Software Engineer

June 2022 – Present

EcoLink

Full-Stack Engineer (via Devsinc)

Feb 2025 – Apr 2026

SaaS LTV Growth Fund

Software Engineer (via Devsinc)

Nov 2024 – Feb 2025

Intellirent

Full-Stack Engineer (via Devsinc)

Jan 2023 – Dec 2024

Biomark

Software Engineer (via Devsinc)

June 2022 – Jan 2023

Let's Build Together

Tell me what you're trying to build or fix in a few lines. Reply within one business day. If it's a fit, next step is a free 20-minute call to scope the work, no pressure either way.

Quick to reply.

I read every message myself. Expect a thoughtful response within one business day.

Based in Pakistan (PKT, UTC+5)

Comfortable overlap with any timezones