For B2B SaaS founders past idea stage who need a production MVP or revenue-critical feature shipped this quarter
We turn a signed written scope into production B2B SaaS in 8 weeks, fixed price. Start with a paid scope sprint and a two-week build — if the direction isn’t right, you get a full refund and we stop.
Free discovery call — 1–2 hours across a few sessions. You leave with a written estimate and a recommended sprint path, whether or not we build it.
App Build Sprint
Teams Jake has worked with
The Problem
The build budget is only the visible cost. The bigger loss is delayed revenue, wasted runway, and learning too late that the wrong thing was built. Here is where it usually goes wrong.
“Eight months. $60K. A zip file with no documentation and code nobody else can read.”
What got delivered was a codebase only the original team understands — vendor lock-in baked into the architecture. Your next developer quotes a $40K rewrite before touching anything.
“I managed the developers instead of running the business. Every spec gap cost me a week.”
No PM means the founder is the PM. Every “is this what you meant?” lands in your inbox at midnight. You hired engineers — nobody told you you were also buying a second job.
“The scope crept. The price crept. The deadline moved three times. Nothing was in writing.”
Vague contracts are designed for the vendor’s benefit. Scope creep is not an accident — it is a business model. A written spec signed by both parties before development starts is the only structural fix.
“I tried no-code. Hit the ceiling at $80K ARR when I needed real auth and multi-tenancy.”
Bubble is fast to start and expensive to rewrite. Every B2B SaaS hits the no-code ceiling. The question is whether you hit it at $0 ARR or at $300K ARR — when the forced rewrite costs the most.
The thing that’s been in the backlog for 3 months is live. In 8 weeks. Fixed price. Full team. No scope creep.
You can see immediately whether the feature is doing what it was built to do — not in a retrospective 6 weeks later.
A PM and two senior engineers in one engagement — design implemented from your Figma, or a standard component library. Not three separate contracts, three onboarding processes, and three Slack channels.
What You Receive
The App Build Sprint delivers a deployed, instrumented, documented product — in your repository, on your infrastructure, owned entirely by you.
Written technical specification, signed before development starts
Exact scope, architecture, acceptance criteria. Signed by both parties. The mechanism that makes fixed price real — no written spec means no fixed price, regardless of what the proposal says.
Backend & API — Python/Node.js/Laravel + PostgreSQL + Redis
RESTful or GraphQL API, documented. Authentication (email/password + OAuth), multi-tenant architecture, RBAC, unit tests on critical paths. Industry-standard, investor-legible, and built to extend.
Frontend — React (TypeScript) with component library
Desktop-first for B2B SaaS, mobile-ready. Form handling, loading states, error boundaries. Implemented from your Figma designs or from standard component library if none provided.
Integrations scoped at intake — Stripe, SendGrid, PostHog, OAuth
Standard integrations included. CRM or ERP integrations (HubSpot, Salesforce) scoped per your stack and agreed in the written spec — not discovered as extras at week six.
Infrastructure & CI/CD — Docker, GitHub Actions, AWS/GCP
Staging and production environments. SSL, uptime monitoring, database backups, structured logging. Your product ships production-grade, not staging-ready.
Analytics instrumentation — PostHog event tracking from day one
Key user actions tracked, funnel configured, error monitoring live. You can see on launch day whether the product is working — not in a retrospective report six weeks later.
Full documentation handover — architecture, API, deployment runbook
Architecture diagram, database schema, API docs, deployment runbook, environment variable reference, onboarding notes for your next developer. Source code delivered to your repository, not ours.
The 8-Week Breakdown
After the paid Scope Sprint, the build runs in two-week sprints. The timeline is contractual — defined deliverables, defined acceptance criteria, a signed checklist before the next sprint begins. The first sprint is fully refundable; no surprises at week six.
Weeks 1–2
Sprint 0: Foundation
Sprint goal
Working skeleton. Auth, database schema, CI/CD running, staging live.
Decision point — full money back
End of week 2: the foundation is running in your repo, the architecture is visible, staging is live, and you’ve seen how the team works. Continue to the full build, or take a full refund of the Scope Sprint and this sprint — your call, no justification needed.
Weeks 3–4
Sprint 1: Core Feature
Sprint goal
Primary user-facing feature working end-to-end. Not polished, but functional.
Acceptance criteria
Primary feature works end-to-end against the signed spec. Demo walkthrough with the client, core data flows verified, sprint acceptance checklist signed before Sprint 2 begins.
Weeks 5–6
Sprint 2: Integrations
Sprint goal
Secondary features and integrations. Product is getting close to complete.
Acceptance criteria
Billing: test subscription creation, upgrade, and cancellation. Integrations: end-to-end data flow verified with client’s test accounts. Secondary features: demo walkthrough with client.
Weeks 7–8
Sprint 3: Production Launch
Sprint goal
Production-grade. Ready for real users.
Final acceptance
Client logs in on production. Backup restore verified. Documentation reviewed. All credentials transferred. Final acceptance sign-off. 30-day warranty period begins.
Try Before You Commit
You never commit to the full build on day one. You commit in stages, and the early stage is fully refundable. The risk of picking the wrong team is on us, not you.
Start with a paid Scope Sprint (we define exactly what gets built) and your first two-week build sprint. At the end of those two weeks you see real, working software and the direction it’s heading. If you don’t like it, you get a full refund of the Scope Sprint and the first sprint and we stop — no further obligation. If you do, we continue through the remaining scope to the fixed-price build.
After the first two-week build sprint, you decide the direction isn’t right for you. No justification required — your call.
The full amount paid so far — the Scope Sprint and the first build sprint. Not a credit. Not a negotiation. Money back, engagement ends.
Same principle, different shape: a two-week satisfaction guarantee on the hire. Not the right fit in the first two weeks? We waive those hours and replace the engineer or end it — your call.
Once you approve continuation, we work through the agreed scope at the fixed price. Scope changes are discussed between sprints with time and cost, approved before the next sprint begins.
No lock-in. You decide whether to continue after you’ve seen two weeks of working software — not before a line of code is written.
Team Composition
Most build shops give you one or the other: engineers who ship exactly what the brief says, or strategists who can’t build. Here the scope is set by a B2B SaaS product and growth operator, and built by senior engineers whose production experience is in banking, fintech, and AI systems — regulated, high-stakes code, not throwaway CRUD.
Standard configuration: 1 Project Manager + 2 Senior Engineers. This is the minimum configuration. Larger builds are staffed accordingly at the discovery call.
Not included in standard sprint
Dedicated QA engineer (testing handled by engineers) · Designer (we implement from your Figma, or standard component library if none provided) · Data engineer (analytics instrumentation included; data warehouse is an upgrade) · DevOps (deployment automation included; bespoke multi-region infra is an upgrade)
I’m Jake. 8+ years in B2B SaaS product and growth — not as a developer shipping features, but as the person accountable for whether those features moved the business. I’ve scoped, staffed, and delivered product sprints across healthtech, adtech, edtech, and B2B tools.
I started ProductQuant because I kept seeing the same problem: founders paying for engineering with no product thinking in the room. Engineers shipped exactly what the brief said. The brief was wrong. Nobody caught it until the feature was live and the metrics didn’t move.
10+ years building backend systems, APIs, and data pipelines. Specialises in PHP/Laravel, Node.js, React, and complex architecture. Backend that your next hire reads and maintains without calling the original agency.
7+ years shipping distributed systems and AI-integrated applications. Technical team lead with deep experience in Node.js, TypeScript, and C#/.NET. Has built real-time voice+vision assistants, GPT-powered publishing engines, and SSE streaming systems.
7+ years building full-stack web applications with a focus on React, TypeScript, and NestJS. Deep experience designing and shipping multi-module platforms — multi-tenant auth, role-based access, and productivity app integrations.
The Stack
Industry-standard, investor-legible, and built to extend. A no-code app raises hard questions in technical due diligence. A documented React/Node/PostgreSQL codebase doesn’t.
The stack you build on day one determines what you can do on day 365. No-code tools give you day-one speed and day-365 walls. A production React/Node/PostgreSQL stack gives you a platform that scales as the product scales — and passes technical due diligence at every funding stage.
The total cost of a no-code MVP that hits its ceiling and requires a full rewrite is 2–3x the cost of building on a proper stack from the start. The faster initial cost of no-code is an illusion amortised over the rewrite timeline.
How We Compare
A build fails three ways: it runs over budget, it runs over time, or it ships and lands with no one — wrong for users, wrong for GTM. The structure you choose decides which of those risks fall on you.
| Dev shop / agency | Senior FTE hire | No-code (Bubble) | ProductQuant Sprint | |
|---|---|---|---|---|
| Price model | Time & materials — or “fixed” that becomes T&M on page 3 | $150K–$220K/year fully-loaded | Platform subscription + rewrite cost later | Fixed price in signed contract |
| Timeline | 6–12 months — aspirational, not contractual | 3–6 months recruiting before any code written | Fast to start, rewrite required at $200K–$500K ARR | 8 weeks — contractual |
| Accountability | No recourse when scope isn’t delivered | No PM — founder manages the engineer | No contractual recourse — platform owns the product | Two-week build trial — full money back if the direction isn’t right. |
| PM included | Account manager who relays messages | Founder is the PM | No PM, no engineering team | PM owns sprint decisions, not a coordinator |
| Code quality | Variable — junior to mid, minimal documentation | One person’s throughput, context dies when they leave | Proprietary platform, no real codebase | Senior engineers, documented, maintainable by next hire |
| Scalability | Depends on team — often rewrite required | One person’s throughput — no surge capacity | Hits ceiling at multi-tenancy / complex billing | React/Node/PostgreSQL — scales to Series B+ |
| Investor DD | Depends on documentation — usually painful | Depends on engineer’s documentation habits | No-code raises hard questions in technical diligence | Architecture docs included — non-event at diligence |
| Ownership | Codebase in a zip file — often without docs | You own the code — if they documented it | Platform owns the product — no IP transfer | Source code to your repo from day one |
Pricing
Every full build starts with a paid Scope Sprint and a two-week build you can walk away from for a full refund. Continue, and the rest is fixed price — PM, senior engineers, analytics, documentation, and source code transfer included. Prefer to hire by the hour? That option is below.
We define exactly what gets built (scope, architecture, acceptance criteria), then build your first two weeks so you can see the direction and how the team works. Don’t like it? Full money back on the Scope Sprint and the first sprint, and we stop.
Refundable — and credited toward your build if you continue
Fixed price · scope agreed in writing before start
One feature. Scoped, built, and shipped in 3–4 weeks. You describe the outcome — we spec it, build it, and hand it over at a fixed price.
Two-week build trial: full money back if the direction isn’t right.
Fixed price · scope agreed in writing · paid Scope Sprint first
Full B2B SaaS MVP — from written spec to production deployment. React, Laravel/Node.js, PostgreSQL. PM + senior engineers. Documentation and source code transfer included.
Two-week build trial: full money back if the direction isn’t right. The $2,500 Scope Sprint credits toward this build when you continue.
Top engineers by the hour · no fixed-scope commitment
Need senior engineering capacity without a fixed build? Hire our developers by the hour to slot into your team and roadmap. You direct the work — we bring banking-, fintech-, and AI-grade engineers.
2-week satisfaction guarantee on the hire: not the right fit in two weeks, we waive those hours and replace or end the engagement.
How payment is staged — Full Build
Refundable
Scope Sprint — paid upfront
Refundable
First 2-week build sprint — decision point
Committed
Remaining fixed-price build — staged payments tied to signed sprint acceptance
Exact fees and deposit split are confirmed in the Scope Sprint agreement before any work begins.
Trust Signals
Before we write a line of code. The spec defines exact scope, architecture, acceptance criteria. Not a proposal — a signed document.
You sign off on each sprint before the next begins. Each staged payment is tied to a signed acceptance checklist. No “well, that wasn’t in scope” surprises.
You own the code immediately. Not at the end of the engagement — from Sprint 0. If we close tomorrow, the product works and belongs to you.
You speak to the PM. The PM speaks to the engineers. There is no account manager relaying messages between you and the people building your product.
No obligation, no invoice. The discovery summary belongs to you — take it to any other vendor. We only proceed if the fit is real.
React, Laravel/Node.js, PostgreSQL. Not “modern tech” — named tools. Not “experienced team” — named engineers with verifiable history.
Common Questions
Fixed price. Written spec. Two-week build trial with a full money-back guarantee. Book the free discovery call — no commitment, no invoice. Written estimate within 48 hours.
Fixed price. Written spec. Two-week build, full money back if it’s not right. In the contract.
