Custom Ruby on Rails development for growing businesses.
41Stack is a Pakistan-based Rails development agency. We build custom SaaS products, FBR/PRAL integrations, and business automation for clients in the UK, US, and UAE — full-stack team, fast turnaround, competitive offshore rates.
Rails · API development · FBR/PRAL integration · SaaS MVPs
What we build
We're a Ruby on Rails shop. We take on custom builds, SaaS products, and integration work for businesses that need software that actually fits.
Why teams hire us
A small, senior Rails team that ships. Here's what working with us actually gets you.
Deep Rails expertise
Rails is our main stack, not a side skill. We ship production Rails — including our own live SaaS products.
Competitive offshore rates
Pakistan-based, so you get senior full-stack work at a fraction of UK/US agency rates — without cutting quality.
Timezone overlap & English
Several hours of daily overlap with UK and EU working hours, and fluent English — so it feels like an in-house team.
We ship small and fast
A short cycle from scope to a first useful version. You use it, we adjust. No quarter-long black boxes.
SaaS products we've built with Rails
We don't just take client work — we ship and run our own Rails SaaS products. Here's proof we can build and operate software, not just demo it.
Fbrly
Our FBR digital invoicing SaaS for sales-tax-registered businesses in Pakistan.
Create an invoice, submit it to FBR via IRIS and PRAL, and get back a verified IRN and QR on the PDF. Covers all 28 tax scenarios (SN001–SN028), with sandbox-to-production rollout, public invoice links, stock, and purchase orders built in.
Postory
Our point-of-sale and inventory SaaS for retail shops.
Ring up sales, track stock, manage products and categories, and see daily sales reports. Built for multi-branch retail with centralized reporting. Runs entirely in the browser.
How a project usually goes
A plain, written-down process. You always know what's shipping next, when, and what it costs.
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01
Discovery
A 30-minute call on what you actually need. We tell you honestly if we're the right fit.
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02
Planning
A short written scope: what we'll ship, the timeline, and a clear price. No surprises later.
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03
Design
Data model, screens, and the API surface — agreed before we write production code.
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04
Development
We ship a small, real first version in weeks, not quarters. You use it. We adjust.
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05
Testing
A test suite around the critical paths, plus staging review with your team before launch.
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06
Launch
Deployment, monitoring, and a clean cutover — on our hosting or yours.
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07
Support
We can run it, keep it up, and fix bugs — or hand it over clean. Your call.
Questions
Got a different question? Email us.
What does it cost to hire a Ruby on Rails developer through 41Stack?
Because we're based in Pakistan, you get senior full-stack Rails work at a fraction of typical UK or US agency rates, without a drop in quality. Pricing depends on scope — we quote each project after a short scoping call, and we offer both hourly and fixed-price arrangements. Tell us what you're building and we'll give you a clear number.
Why outsource Rails development to Pakistan?
You get senior engineers at competitive offshore rates, several hours of daily overlap with UK and EU working hours, and fluent English communication. We run our own live Rails SaaS products, so you're hiring a team that ships and operates real software — not just a body shop.
Do you work hourly or fixed-price?
Both. For well-scoped projects we usually fix a price and timeline up front. For ongoing work, open-ended builds, or retainers, hourly tends to fit better. We'll recommend whichever is fairer for your situation during the scoping call.
What's your Ruby on Rails experience?
Rails is our primary stack. We've built and run our own SaaS products on it — Fbrly (FBR digital invoicing with full IRIS/PRAL integration) and Postory (retail POS and inventory) — plus client integrations across Amazon SP-API, eBay, Shopify, and PRAL/FBR. We work across the full stack: data modeling, backend, APIs, frontend, and deployment.
Can you integrate FBR / PRAL digital invoicing into our existing system?
Yes. We built our own FBR digital invoicing product, so we know IRIS, PRAL, IRN, QR codes, and all 28 tax scenarios (SN001–SN028) end to end. We can integrate that submission flow into your existing ERP or billing system, or build compliance from scratch under SRO 709(I)/2025.
How do we get started?
Book a call or send us a short brief from the Contact page. We'll spend 30 minutes understanding what you need, tell you honestly whether we're a good fit, and follow up with a written scope, timeline, and price.
Have a Rails project in mind?
Tell us what you're building. We'll tell you honestly whether we're the right team, and follow up with a clear scope, timeline, and price.