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New Product Development · MVP & SaaS

Greenfield product builds, shipped in 8 weeks

Web, mobile and API products built from scratch with LLM coding agents on every project. MVPs validated, SaaS platforms launched, internal tools delivered, in roughly a third of the time and cost of a traditional offshore team.

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RG INSYS LLP builds new SaaS, web and mobile products end to end on a modern Node.js, React and TypeScript stack hosted on AWS. We pair senior architects with Claude Code, Cursor and GitHub Copilot to ship MVPs in 6 to 10 weeks with 80%+ automated test coverage from day one. Founders, scale ups and enterprise teams across the UK, US and UAE use us as their delivery partner when speed and quality both matter.

What we deliver
Full product builds: discovery, architecture, frontend, backend, mobile, infrastructure, automated tests and documentation. You receive a deployed system, the source code and a written runbook.
Typical timeline
6 to 10 weeks for an MVP. 12 to 16 weeks for a multi tenant SaaS platform. 30 day stabilisation period included.
Pricing from
$15,000 fixed price for a focused MVP. $4,500/month for an ongoing retainer. Transparent quotes, no hidden fees.
Stack
Node.js, TypeScript, React, Next.js, React Native, Flutter, PostgreSQL, Redis, AWS (ECS, RDS, S3, CloudFront), Stripe, Auth0.
Compliance-ready for
GDPR, SOC 2, HIPAA, PCI DSS. UK, EU and US data residency available. AES-256 at rest, TLS 1.3 in transit, RBAC and audit logging built in.
What's included

Everything a real product needs, end to end

🧭

Discovery and product specification

One week of structured workshops, user journey mapping and feature prioritisation. You leave Phase 0 with a written scope, wireframes and a backlog you can sign off on. No code is written until alignment is locked.

🏗️

Architecture and data model

A senior engineer designs the system: services, data flow, authentication model, third party integrations and deployment topology. You receive an architecture document, a Mermaid system diagram and an ERD before sprints begin.

⚛️

Frontend and mobile

React or Next.js for the web, React Native or Flutter for cross platform mobile. Production grade design system, accessibility checks, performance budgets and Lighthouse scores above 90 on the public facing pages.

🛠️

Backend, APIs and integrations

Typed Node.js APIs with Prisma, OpenAPI specs, idempotent webhooks and retry logic. We integrate Stripe, Auth0, Twilio, SendGrid, Segment and most third party SaaS tools without surprises.

🧪

Automated tests, written by AI

Vitest and Jest for unit, Supertest for API, Playwright for end to end. Coverage targets are written into the contract, typically 80%+ on the backend and full E2E flows on the critical paths. Tests are part of the deliverable, not optional.

☁️

Cloud, CI/CD and observability

Infrastructure as code with Terraform, GitHub Actions pipelines, blue/green deploys, Sentry, structured logging and Grafana dashboards. Your engineering team can ship the next feature on day 56 without rebuilding the platform.

Our method

How a new product build actually unfolds

01
Discovery, week 1

Product workshops, user journey mapping and a written specification. Output: scope, wireframes, MVP feature list and Phase 2 backlog. Fixed price quote signed.

02
Architecture, week 2

Senior engineer designs services, data model, security model and AWS topology. AI scaffolds the empty repo with linting, tests, CI and a deployable hello world before any feature work begins.

03
Sprint cadence, weeks 3 to N

Two week sprints. AI handles CRUD, routes, models, tests and migrations at machine speed. Senior engineers own logic, security and reviews. Demo every Friday. Slack always live.

04
Stabilisation and handover

30 day post launch period: critical bugs fixed inside 4 hours, runbook handed over, your team trained. Optional retainer continues delivery. You own everything from day one.

Our tech stack for new product development

We pick boring, mainstream technology on purpose. Hiring is easier, security patches arrive faster and no one is locked into an exotic framework when the team scales. Where you have a strong preference, we adapt; where you don't, we default to the stack below because we have shipped it dozens of times and the AI agents know it cold.

Node.js 20 TypeScript React 18 Next.js React Native Flutter PostgreSQL Redis Prisma ORM AWS (ECS / RDS / S3) Terraform GitHub Actions Stripe Auth0 / Clerk Sentry Playwright
Proof

A representative case study

PropTech · SaaS UK based real estate operator

Real estate CRM SaaS, MVP to paying customers in 10 weeks

A UK property management group needed a multi tenant CRM with lead capture, viewing scheduling, document signing and a tenant portal. We delivered a fully tested SaaS on Node.js, Next.js and PostgreSQL in 10 weeks with two engineers and Claude Code, including Stripe billing, role based access for agents, and a Playwright suite covering the critical journeys.

10 wksPhase 1 delivery
2 devsTotal team size
87%Backend test coverage
$22kFixed price

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Pricing

Transparent pricing for new product development

From $15,000

Fixed price MVP. Or move to an ongoing retainer from $4,500/month with a dedicated senior engineer plus AI tooling.

  • One week discovery and written specification
  • Full source code, infrastructure and credentials under your ownership
  • 80%+ automated test coverage written into the contract
  • 30 day post launch stabilisation, P1 fixes inside 4 hours
Full pricing & engagement models →

All pricing transparent. No hidden fees. Free 48-hour written estimate.

FAQ

Common questions

Most MVPs ship in 6 to 10 weeks. A focused single product MVP with authentication, core CRUD, payments and a polished frontend typically sits at 8 weeks with a team of 2 to 3 engineers using LLM coding agents. Larger SaaS platforms with multi tenant architecture, role based access control and reporting take 12 to 16 weeks.
A fixed price MVP from $15,000 includes a one week discovery phase, written architecture document, full source code under your ownership, a deployed staging environment on AWS, automated test coverage targeting 80%+, CI/CD pipeline, OpenAPI documentation and a 30 day stabilisation period after launch where critical bugs are fixed at no additional cost.
Yes. We build cross platform mobile apps using React Native and Flutter, sharing as much logic as possible with the web frontend. Native iOS (Swift) and Android (Kotlin) are available where platform specific behaviour, hardware access or App Store performance demands it.
You do, from day one. All code is committed to a repository under your GitHub or GitLab organisation. Cloud accounts are billed directly to you. Domain, secrets and credentials are yours. There is no vendor lock in. We document the system clearly enough that any competent engineering team can take it over.
During the one week discovery we run product workshops, document user journeys and rank features by business impact and engineering cost. The output is a written specification with an MVP scope you can sign off on and a Phase 2 backlog of features parked until after launch. The aim is the smallest version that real users will pay for or rely on.
Senior engineers design the architecture, security model, data schemas and business rules. Claude Code, Cursor and GitHub Copilot scaffold the implementation, generate tests, write migrations and produce documentation. Every line of generated code is reviewed by a senior engineer before merge. Critical paths such as authentication, payments and access control are always written and audited by humans.
Yes. After a successful build many clients move to a dedicated retainer or a hire from us model. There is no placement fee. The same engineer who built the system can stay on as a long term technical lead, embedded in your standups and reporting to your CTO.
Phase 1 scope is locked at contract signing. Any changes go through a formal change request: a written impact analysis on cost and timeline before any work begins. You decide whether to add the change to Phase 1 or park it for Phase 2. There are no surprise invoices.
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