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41Stack
Services

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.

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01

Ruby on Rails Development

Full-stack Ruby on Rails development — from a fresh app to a feature on an existing codebase.

We design the data model, build the backend, and ship a clean, fast UI on top. Rails for the server, Hotwire or a JS frontend where it helps, PostgreSQL underneath. You get a maintainable codebase, not a pile of plugins.

Discuss your project

Deliverables

  • Production-ready Rails application or feature
  • Data model and architecture documentation
  • Test suite and deployment pipeline

Technologies

Ruby on RailsPostgreSQLHotwire / TurboTailwind CSS

Estimated timeline

2–8 weeks per milestone

02

Custom SaaS Product Development

We take a SaaS idea from scope to a shipped MVP your first users can pay for.

Auth, billing, multi-tenancy, background jobs, and a dashboard people can actually use. We ship a small, real version in weeks, you put it in front of users, and we iterate from what they say — not a 12-month roadmap.

Discuss your project

Deliverables

  • Shipped MVP your first users can pay for
  • Auth, billing, and multi-tenant foundation
  • Admin dashboard and background jobs

Technologies

Ruby on RailsPostgreSQLStripe / billing APIsHotwire / Turbo

Estimated timeline

6–12 weeks to first release

03

FBR / PRAL Integration & Compliance

Real-time FBR digital invoicing through IRIS and PRAL — integrated into your existing system.

We built Fbrly, our own FBR digital invoicing product, so we know IRIS, PRAL, IRN, QR, and all 28 tax scenarios (SN001–SN028) end to end. We can integrate the same submission flow into your app, or stand up compliance from scratch under SRO 709(I)/2025.

Discuss your project

Deliverables

  • Real-time FBR submission wired into your system
  • IRN and QR on every uploaded invoice
  • All 28 tax scenarios validated, sandbox to production

Technologies

PRAL / IRIS APIsRuby on RailsPostgreSQLPDF generation

Estimated timeline

3–6 weeks including sandbox sign-off

04

API Development & Third-Party Integrations

REST APIs, webhooks, and integrations with the platforms your business already runs on.

We design and document clean REST APIs and wire your app into the services that matter — payments, shipping, marketplaces, and government APIs. We've shipped Amazon SP-API, eBay, Shopify, and PRAL/FBR integrations in production.

Discuss your project

Deliverables

  • Documented REST API or working integration
  • Webhook handling and retry-safe background jobs
  • Monitoring and error reporting in place

Technologies

REST / JSON APIsAmazon SP-APIeBay & Shopify APIsWebhooks

Estimated timeline

2–6 weeks per integration

05

Legacy Rails Modernization

Upgrade, stabilize, and de-risk an aging Rails app without a rewrite.

Old Rails version, no tests, slow pages, and the person who wrote it is gone — we've seen it. We bring the framework current, add a test safety net, fix the worst performance, and leave you a codebase a new developer can pick up.

Discuss your project

Deliverables

  • Current Rails version and patched dependencies
  • Test safety net around critical paths
  • Performance fixes and a handover-ready codebase

Technologies

Ruby on Rails upgradesRSpec / MinitestPostgreSQLCI pipelines

Estimated timeline

4–10 weeks depending on app size

How we work

How a project usually goes

A plain, written-down process. You always know what's shipping next, when, and what it costs.

  1. 01

    Discovery

    A 30-minute call on what you actually need. We tell you honestly if we're the right fit.

  2. 02

    Planning

    A short written scope: what we'll ship, the timeline, and a clear price. No surprises later.

  3. 03

    Design

    Data model, screens, and the API surface — agreed before we write production code.

  4. 04

    Development

    We ship a small, real first version in weeks, not quarters. You use it. We adjust.

  5. 05

    Testing

    A test suite around the critical paths, plus staging review with your team before launch.

  6. 06

    Launch

    Deployment, monitoring, and a clean cutover — on our hosting or yours.

  7. 07

    Support

    We can run it, keep it up, and fix bugs — or hand it over clean. Your call.

Stack

What we build on

Boring on purpose. Mostly Ruby on Rails and PostgreSQL, with Flutter for mobile.

Backend

  • Ruby on Rails
  • REST APIs
  • PostgreSQL
  • Background jobs

Frontend

  • Hotwire / Turbo
  • JavaScript
  • Tailwind CSS
  • Flutter

Cloud & Ops

  • AWS
  • Docker
  • Kamal
  • Nginx

Integrations

  • Amazon SP-API
  • eBay
  • Shopify
  • PRAL / FBR

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.

Book a call Email us