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Full-stack development

Updated September 2026

Full-stack development your team can Own After Launch.

Full-stack development your team can Own After Launch.

Full-stack development your team can Own After Launch.

Full-stack development your team can Own After Launch.

Rango is an AI-native full-stack development partner for B2B SaaS, fintech and infrastructure teams.

Rango is an AI-native full-stack development partner for B2B SaaS, fintech and infrastructure teams.

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Claude

Ask Claude

Rango builds full-stack products for B2B SaaS, fintech and infrastructure teams. Database, APIs, auth, integrations and UI ship from One Accountable Team, not a chain of handoffs. Designers and engineers sit in the same in-house team, and we work in your repo and your CI, in the stack you already run.

Rango builds full-stack products for B2B SaaS, fintech and infrastructure teams. Database, APIs, auth, integrations and UI ship from One Accountable Team, not a chain of handoffs. Designers and engineers sit in the same in-house team, and we work in your repo and your CI, in the stack you already run.

Rango builds full-stack products for B2B SaaS, fintech and infrastructure teams. Database, APIs, auth, integrations and UI ship from One Accountable Team, not a chain of handoffs. Designers and engineers sit in the same in-house team, and we work in your repo and your CI, in the stack you already run.

Every feature ships with Tests And Monitoring and Docs Your Team Keeps, so your engineers never have to guess

Every feature ships with Tests And Monitoring and Docs Your Team Keeps, so your engineers never have to guess

Every feature ships with Tests And Monitoring and Docs Your Team Keeps, so your engineers never have to guess

how the code behaves in production.

how the code behaves in production.

how the code behaves in production.

Anish Manglani
Md Shahanab Uddin
Amit Pathania
Faizan Mahida
Shreyash Chhatbar
Divyesh Vasani
Sagar Ludhiyani

Choose between

New product or new feature. Same Team Throughout.

New product or new feature. Same Team Throughout.

Add to a live product

We read the codebase first, follow its conventions and ship new features, integrations and fixes through your pull requests, without a rewrite or a code freeze.

Diagram of a new feature module passing through code review before it merges into a product that is already running

Build a new product

A written spec and data model come first, then auth, the core workflow, billing and an admin view, designed and built by one team in your repo.

Diagram of a new product built in order: a written spec, then a data model, then screens with auth, billing and admin views

Take over a codebase

Inherited code or a stretched team? We audit it, fix what is risky and keep shipping as your fractional engineering team until you hire.

Diagram of an inherited codebase being audited and sorted into stable reviewed work while the pipeline keeps running

Full-stack development services

Everything a feature needs, From Schema To Screen.

Everything a feature needs, From Schema To Screen.

Everything a feature needs, From Schema To Screen.

01

MVPs and new products

A working product in front of real users, not a deck for investors. Claude drafts the scaffolding, tests and boilerplate while our engineers own the data model, the architecture and every merge. You get auth, the core workflow, billing and an admin view running in your own repo.

02

Features on a live product

We read your codebase first, follow its conventions and ship behind flags through your pull request flow. Agents draft the repetitive parts and a senior engineer reviews every change before it merges. New work lands without a rewrite, a code freeze or a second team to coordinate.

03

Rescue for AI-written code

The demo works, but nobody trusts the codebase underneath. We audit what is structural, what is cosmetic and what is about to break, then refactor in place while the product stays live. What works stays, the rest is replaced, and tests go in as we go.

04

APIs, data and integrations

Typed APIs, schemas with migrations, webhooks and background jobs, plus the CRM, billing and data tools your product depends on. AI drafts client code and fixtures from the vendor docs, engineers decide the contracts and the failure behavior. Calls fail loudly and retry safely instead of disappearing.

05

Auth, roles and audit trails

SSO, role-based access, tenant isolation and audit logs designed in from the first table, not bolted on before a security review. We model the permissions with you before any screen is built. Enterprise questionnaires stop turning into rework.

06

AI features in production

Chat, search, summaries and agents built on the model APIs you choose, with retrieval, evals, cost limits and fallbacks. We design what people see when the model is slow, unsure or wrong. The feature holds up on real customer data instead of a demo script.

MVPs and new products

A working product in front of real users, not a deck for investors. Claude drafts the scaffolding, tests and boilerplate while our engineers own the data model, the architecture and every merge. You get auth, the core workflow, billing and an admin view running in your own repo.

Features on a live product

We read your codebase first, follow its conventions and ship behind flags through your pull request flow. Agents draft the repetitive parts and a senior engineer reviews every change before it merges. New work lands without a rewrite, a code freeze or a second team to coordinate.

Rescue for AI-written code

The demo works, but nobody trusts the codebase underneath. We audit what is structural, what is cosmetic and what is about to break, then refactor in place while the product stays live. What works stays, the rest is replaced, and tests go in as we go.

APIs, data and integrations

Typed APIs, schemas with migrations, webhooks and background jobs, plus the CRM, billing and data tools your product depends on. AI drafts client code and fixtures from the vendor docs, engineers decide the contracts and the failure behavior. Calls fail loudly and retry safely instead of disappearing.

Auth, roles and audit trails

SSO, role-based access, tenant isolation and audit logs designed in from the first table, not bolted on before a security review. We model the permissions with you before any screen is built. Enterprise questionnaires stop turning into rework.

AI features in production

Chat, search, summaries and agents built on the model APIs you choose, with retrieval, evals, cost limits and fallbacks. We design what people see when the model is slow, unsure or wrong. The feature holds up on real customer data instead of a demo script.

AI drafts the first pass. Engineers Own Every Merge.

AI drafts the first pass. Engineers Own Every Merge.

AI drafts the first pass. Engineers Own Every Merge.

Illustration of a designer working on a laptop in a dark office at night

Guardrails, not autopilot

Agents draft inside your repo’s conventions, types and tests, and a senior engineer reviews every pull request before it merges. Benchmarks score agents on well-specified issues, not on your architecture.

Illustration of a designer working on a laptop in a dark office at night

Guardrails, not autopilot

Agents draft inside your repo’s conventions, types and tests, and a senior engineer reviews every pull request before it merges. Benchmarks score agents on well-specified issues, not on your architecture.

Illustration of a designer working on a laptop in a dark office at night

Guardrails, not autopilot

Agents draft inside your repo’s conventions, types and tests, and a senior engineer reviews every pull request before it merges. Benchmarks score agents on well-specified issues, not on your architecture.

US hours, US contracts

The engineers on your product work an agreed overlap with your US day. Contracts are in USD, IP is assigned to you from the first commit, and MSAs and NDAs follow the terms US companies expect.

US hours, US contracts

The engineers on your product work an agreed overlap with your US day. Contracts are in USD, IP is assigned to you from the first commit, and MSAs and NDAs follow the terms US companies expect.

US hours, US contracts

The engineers on your product work an agreed overlap with your US day. Contracts are in USD, IP is assigned to you from the first commit, and MSAs and NDAs follow the terms US companies expect.

Your engineers, in your Slack

Your engineers, in your Slack

Your engineers, in your Slack

The engineers building your product join your Slack or Teams, so a question about an edge case is answered in minutes instead of at the next standup.

The engineers building your product join your Slack or Teams, so a question about an edge case is answered in minutes instead of at the next standup.

The Rango team in Rango t-shirts
Illustration of a phone screen built from page layout blocks

Previews you can click

Every pull request gets a preview deploy, so you test the real feature on the real data paths before it reaches production.

Illustration of a phone screen built from page layout blocks

Previews you can click

Every pull request gets a preview deploy, so you test the real feature on the real data paths before it reaches production.

Illustration of a phone screen built from page layout blocks

Previews you can click

Every pull request gets a preview deploy, so you test the real feature on the real data paths before it reaches production.

Illustration of a laptop on a desk at night showing a chat interface

Your repo, your branch, your CI

We work in your GitHub and run in your pipelines, so nothing has to be moved or rebuilt when we step back.

Illustration of a laptop on a desk at night showing a chat interface

Your repo, your branch, your CI

We work in your GitHub and run in your pipelines, so nothing has to be moved or rebuilt when we step back.

Illustration of a laptop on a desk at night showing a chat interface

Your repo, your branch, your CI

We work in your GitHub and run in your pipelines, so nothing has to be moved or rebuilt when we step back.

Choosing a full-stack development partner

Rango

Freelance developer

Traditional agency

Choosing a full-stack development partner

Rango

Freelance developer

Traditional agency

What It Costs

What It Costs

Scope and price fixed before we start.

Scope and price fixed before we start.

Cheap hourly, until the rework.

Cheap hourly, until the rework.

A retainer before anything ships.

A retainer before anything ships.

How It Ships

How It Ships

Weekly releases from the first sprint.

Weekly releases from the first sprint.

Fast alone, stalls on the hard parts.

Fast alone, stalls on the hard parts.

Months, through a fixed plan.

Months, through a fixed plan.

Who Builds It

Who Builds It

Designers and engineers in one team.

Designers and engineers in one team.

One person, with no designer.

One person, with no designer.

A bench you meet after signing.

A bench you meet after signing.

A Change To The Data Model

A Change To The Data Model

One migration, tested and reviewed.

One migration, tested and reviewed.

Depends on when they are free.

Depends on when they are free.

A change request and a quote.

A change request and a quote.

After Handoff

After Handoff

Your team ships from the code.

Your team ships from the code.

The context leaves with them.

The context leaves with them.

A handover doc and a support queue.

A handover doc and a support queue.

Working Hours

Working Hours

Daily overlap with your US hours.

Daily overlap with your US hours.

Whenever they are online.

Whenever they are online.

Business hours, one time zone.

Business hours, one time zone.

Where The Code Lives

Where The Code Lives

Your GitHub, from the first commit.

Your GitHub, from the first commit.

Their machine until they hand it over.

Their machine until they hand it over.

Their repo, handed over at the end.

Their repo, handed over at the end.

Code that holds up in production, not just in the demo.

Code that holds up in production, not just in the demo.

Code that holds up in production, not just in the demo.

We build against the OWASP Top 10 and WCAG 2.2 AA, type the code end to end and ship every change through tests, code review and CI, with error tracking and logs in place before launch.

We build against the OWASP Top 10 and WCAG 2.2 AA, type the code end to end and ship every change through tests, code review and CI, with error tracking and logs in place before launch.

  • Typed end to end

  • OWASP Top 10 checks

  • Role-based access control

  • Audit logs on key actions

  • GDPR and CCPA data handling

  • CI on every pull request

  • Preview deploys per branch

  • Versioned migrations

  • Automated test coverage

  • Error tracking and alerts

  • Secrets kept out of code

  • Product analytics events

  • WCAG AA accessibility

  • Runbooks and handover docs

Tools we use

The stack we build products with.

The stack we build products with.

The stack we build products with.

We write code with Claude and Cursor under senior review, build with Next.js, React and TypeScript, and work in the database and backend you already run. Tests run in CI on every pull request, and Sentry watches production. Need only the interface layer? See front-end development. Need a marketing site instead of a product? See B2B website design.

Claude logo

Claude

Cursor logo

Cursor

Next.js logo

Next.js

React logo

React

TypeScript logo

TypeScript

Node.js logo

Node.js

PostgreSQL logo

PostgreSQL

Prisma logo

Prisma

Supabase logo

Supabase

Vercel logo

Vercel

GitHub logo

GitHub

GitHub Actions logo

GitHub Actions

Vitest logo

Vitest

Playwright logo

Playwright

Sentry logo

Sentry

Linear logo

Linear

Engagement Models

Ways To Work With Rango.

Staff Augmentation

Full-stack engineer (4 to 6 yrs)

Daily async updates, weekly live reviews

1 week trial

Fixed-Scope Build

Ideal for an MVP, a new product or a major feature

Weekly progress reviews

2-FOLD TRIAL

Monthly Partnership

Ideal for new features, integrations and upkeep

Asynchronous updates + fast turnarounds

8 HOUR TRIAL

The questions teams ask us before they start.

The questions teams ask us before they start.

The questions teams ask us before they start.

Orange pixel art of a toll booth with its barrier raised over an open highway into a sunrise
Full-Stack Designers Will Become Superheroes

AI removes the gap between design and building, making judgment more valuable than coding.

AI

3 MIN READ

Orange pixel art portrait of Steve Jobs in round glasses and a black turtleneck, hand on his chin
No Middle Layer

AI gives teams founder-level bandwidth by reducing coordination and increasing ownership.

AI

2 MIN READ

Orange pixel art of two rivers meeting in a mountain valley beside a town at sunset
Confluence: Notes on AI, design, & frontend

AI merges design and frontend, eliminating handoffs and speeding up execution.

AI

2 MIN READ

Frequently asked questions

Straight Answers. No fluff.

How long does full-stack development take?

It depends on scope, but we release to a preview environment every week, so you see working software early. The number of features and user roles, integrations and how settled the requirements are all move the timeline. On the scoping call we will tell you which timeline your project fits.

How much do full-stack development services cost?

Fixed-scope projects start at $1,500, and the final number depends on scope. What moves it: the number of features and user roles, integrations, data migration, security and compliance needs, and whether you need design as well as engineering. We contract in USD.

What tech stack do you work in?

We work in your stack where one exists. For new products we usually build with Next.js, React and TypeScript on Vercel, and choose the database and backend with your engineers based on what your team can run after we step back.

Can you work in our existing codebase?

Yes, and we often do. We start by reading the code and running it locally, follow your conventions and branching rules, and open pull requests your engineers review. Nothing merges that your team has not seen.

Do you design the product as well?

Yes. Designers and engineers are in the same in-house team, so flows, UI and the data model are decided together. If you already have designs or a design system, we build from them.

How do you use AI in development?

AI drafts boilerplate, tests and migrations, and helps us read unfamiliar code faster. It is weakest where the stakes are highest: independent testing of more than 100 models in 2026 found 45% of AI-generated samples introduced an OWASP Top 10 flaw. So senior engineers make the architecture calls, review every change before it merges, and security checks run in CI. AI removes busywork, not judgment.

Who owns the code?

You do. The code lives in your GitHub from the first commit and runs in your own CI, and IP is assigned to you. We document as we go, so your team can run it after the engagement ends.

You use AI. Does the work get cheaper?

Faster, mostly on new and well-specified work. Published 2026 research puts the gain at roughly 35 to 40% on greenfield tasks and under 10% on complex legacy code, which matches what we see. We price on scope, not on how much of the first draft an agent wrote, because the review, tests and security checks that make AI output safe to merge are the work.

Can a US company work smoothly with a team in India?

Yes. We work in your time zone overlap, so reviews turn around in hours rather than overnight. Contracts are in USD, IP is assigned to you, and MSAs and NDAs follow the terms US companies expect. The engineers on your product stay on it from the first commit to launch.

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