B2B SaaS App Builds · Fixed Price, 8 Weeks · PM & Engineers Included
You define the outcome. We spec it, build it, instrument it, and hand it over — with a product manager, senior engineers, and analytics from day one. You review milestones. You never manage a developer, chase a deadline, or hire a single person. Built for ambitious founders who need to move fast.
Scope guaranteed in writing. If we miss the agreed delivery, we finish at no charge. Start with Sprint Zero — a 2-week diagnostic to validate your spec risk-free.
The Build & Ship System
The Real Cost of Building Software
If that quote hits, you're not alone. Here's what we hear from founders every week — and what it actually costs to leave it unaddressed.
"I can't find developers I trust. The ones I find go silent for weeks."
You've tried Upwork, Toptal, and founder-referred freelancers. Every time it's the same cycle: strong start, slow delivery, vanishing communication. Meanwhile your runway burns and your competitors ship.
"My CTO is drowning and my backlog is growing."
Your technical lead is stretched across architecture, hiring, code review, incident response, and the quarterly board deck. The feature that would actually move your retention metric has been "next quarter" for 3 quarters straight.
"I'm managing developers instead of building my business."
Every spec gap, every edge case, every "is this what you meant?" costs you time and focus. You're writing tickets at midnight when you should be closing customers. The dev shop gave you engineers — they didn't give you a product manager.
"The feature shipped. I have no idea if it's working."
No analytics. No dashboard. No way to tell whether the thing you spent $25K building moved a single metric. Your board asks "what's the impact?" and your best answer is "we're monitoring it."
The Other Side
Here's what changes when you work with a team that handles the product, the build, and the measurement — so you don't have to.
You stop being the PM, the QA team, and the escalation point. You review milestones once a week. You focus on your business again.
Analytics instrumentation is in the spec — not retrofitted 6 weeks after launch. You can see from day one whether the feature is moving the metric it was built to move.
Fixed price. Written scope. If we miss the agreed delivery, we finish free. No billing surprises, no "we need 3 more weeks and another $15K" phone call.
How We Deliver
Every sprint follows the same process: define what success looks like, build against a written spec, and ship with instrumentation so you can measure impact immediately.
You tell us what needs to be built. We identify the scope, estimate the complexity, and write a spec before a single line of code is written. You approve it before we start building.
We build against your actual tech stack with regular milestone reviews. You see working code at each stage and approve before the next one starts. No surprises at week six.
Live in production with instrumentation in place from day one. You can see immediately if the feature is working. Full handover includes documentation, monitoring, and a walkthrough.
You don't manage the PM separately from the dev. We bring both — so what gets built is what was needed.
Every sprint includes instrumentation. You know from launch whether the feature is working.
Design and copywriting partners embedded at sprint planning — no sourcing overhead on your side.
The same team builds AI features when you're ready. No agency-hopping when your product needs intelligence.
Why We're Different
Most dev shops give you developers and a project manager. We give you product strategy, senior engineers, analytics instrumentation, and AI-native workflows — in one fixed-price sprint.
I'm Jake. I started ProductQuant because I kept seeing the same problem: founders managing dev shops with no product thinking in the team. 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. Every sprint I run includes product strategy and outcome tracking — not just feature delivery.
We don't have an "AI department." Every senior engineer on our team builds with AI daily — Claude for code generation, automated testing, self-healing error triage, AI-powered code review. We deploy 3–8 production changes per day using the same AI-first workflows we implement for clients.
AI content engines, real-time voice+vision assistants, document processing pipelines, multi-platform communication layers, canvas editors with AI agents embedded. See our case studies →
We figure out what to build before we build it. Every sprint starts with a structured scoping call — not assumptions. We map your product, identify what will actually move your metrics, and write a spec that prevents expensive rework.
Strategy that matches your product's reality
Most sprints go wrong at the brief. We fix that first.
We instrument everything before it ships. When an experiment finishes, you know whether it worked within days — not quarters.
You know what's working within days
We run 8 experiments per month where most teams run 1-2.
Onboarding flows, activation paths, conversion pages, and product UX — measured from launch. Every design choice has a hypothesis and a way to validate it.
Every screen ships with a hypothesis
We design, build, instrument, ship, and measure — then iterate.
We run AI-first workflows internally — Claude for code generation, automated testing, self-healing error triage, AI-powered code review. This isn't theoretical. We deploy 3–8 production changes per day.
AI-first, not AI-bolt-on
AI-assisted gets you 10-20% faster. AI-first gets you 10x faster.
We ship weekly, not quarterly. Monorepo architecture, automated CI/CD, feature flags, and AI-generated test suites. Every feature goes through a 6-phase pipeline. Your team inherits this velocity.
Your org ships weekly
The bottleneck isn't more developers — it's the system. We fix the system.
Growth strategy without execution is a slide deck. We restructure how decisions get made, how data flows, and how experiments ship — so you actually execute at speed.
Your org stops being the bottleneck
1 experiment/month = 1 month of learning. 8 experiments/month = 8 months of learning compressed.
Product manager, senior engineers, React/TypeScript frontend, Laravel/Node backend, PostgreSQL, analytics instrumentation, and a full documentation handover. All in one team. All fixed price.
Book Sprint Zero →What We Build
Every sprint is fixed-scope with a clear outcome. Pick the category that matches your build — or book a call and we’ll scope it together.
Customer-facing SaaS, internal dashboards, B2B portals — browser-based products built to your spec.
Native or cross-platform mobile apps — React Native, Swift, or mobile-first web.
APIs, microservices, third-party integrations, data layer — the infrastructure behind the interface.
LLM integrations, RAG, ML models — shipped as real product capabilities, not demos.
Event tracking, dashboards, A/B testing — the data layer built from day one, not retrofitted later.
Three Ways to Build
Every sprint includes a product manager, senior engineers, and analytics instrumentation. Fixed scope, fixed price. If the first sprint doesn't deliver the agreed outcome, you don't pay.
One feature. Designed, built, and shipped in 6–8 weeks. You describe the outcome — we scope it, spec it, build it, and ship it at a fixed price.
Your Team
1 Product Lead + 1 Designer + 2 Full-Stack Developers
Your outcome: Feature lives in production, instrumented from launch. Money-back guarantee: first sprint — if the agreed scope isn't delivered, you don't pay. Not a credit — a refund.
A product — or a significant rebuild — delivered to production. Scoped, staffed, and delivered at a fixed price with full documentation and handover.
Your Team
1 PM + 1 Lead Designer + 3–4 Full-Stack Developers
Your outcome: Live product with docs + team training. Money-back guarantee: first 2 sprints scoped and agreed — if not delivered, you don't pay.
Developers working alongside your team — or running the full build independently. You direct the work. We own the delivery quality and bring the product thinking.
Your Team
N developers (your call) + Product hours included
Your outcome: Flexible, scalable capacity — pause anytime. Money-back guarantee: first 2 sprints scoped and agreed — if not delivered, you don't pay.
Not ready for a full build? Sprint Zero — a 2-week diagnostic sprint that produces a complete build blueprint. Money-back if the spec doesn't give you a clear path forward. Learn more →
You don't manage the PM separately from the dev. We bring both — so what gets built is what was needed, and you're not the coordination layer.
Every sprint includes instrumentation. You can see immediately if the feature is moving the metric it was built to move. No guessing a quarter later.
Design and copywriting partners embedded at sprint planning — no sourcing overhead on your side.
The same team builds AI features when you're ready. No agency-hopping when your product needs an intelligence layer added to what we've already built.
From Call to Shipped
You tell us what needs to be built. We identify the scope, estimate the complexity, and give you a fixed price or an hourly structure — before you commit to anything.
We write the spec, design the flows, and build against your actual tech stack. Regular milestone reviews. You approve the output at each stage — you're never surprised by what arrives.
Live in production with measurement in place. You can see immediately if the feature is working. If you want to keep going, the team is already up to speed — no ramp-up for the next sprint.
Why This Works
Every objection you have about hiring an external team — we've built the answer into how we work. Not as assurances. As contractual terms written into every engagement.
Fixed price, written scope, milestone-based delivery. Feature Sprint: first sprint at no charge if we miss. App Build: first 2 sprints at no charge. After that, the relationship is proven — you're not worried anymore.
PM included. We write the spec, run the standups, catch scope drift, and keep you updated. You review milestones once a week. You don't manage the team — you approve the output.
Every sprint includes analytics instrumentation live from launch. You can see immediately whether the feature moved the metric it was built to move. No guessing, no waiting for a retrospective report.
Full documentation, monitored dashboards, and a walkthrough session. Your team owns the code, the infrastructure, and the analytics from day one. No dependency on us to keep it running.
Who You’re Working With
No account managers, no junior handoffs. Every sprint is run by senior engineers who own the outcome — from scoping through to production handover.
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 know the difference between a well-built spec and one that creates expensive rework at week four.
I started ProductQuant because I kept seeing the same problem: founders and PMs managing dev shops with no product thinking in the team. 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, Node.js, React, and complex architecture — from canvas editors with 16-handler orchestration to AI-powered product extraction pipelines that turn any retailer URL into structured product data in one click.
7+ years shipping distributed systems and AI-integrated applications. Technical team lead with deep experience in Node.js, TypeScript, C#/.NET, and LangChain/LangGraph. Has built real-time voice+vision assistants, GPT-powered publishing engines, and museum AI agents with SSE streaming.
7+ years building full-stack web applications with a focus on React, TypeScript, and NestJS. Deep experience designing and shipping multi-module AI workspace platforms — project-scoped AI sessions, file management, multi-platform communication channels (Telegram, Slack, Discord), and productivity app integrations (Mail, Google, Drive).
Each developer ships with documented code, tested integrations, and a build you can verify independently.
See what they've built →Common Questions
Fixed price, written scope, milestone-based delivery. If the first sprint doesn't hit the agreed outcome, you don't pay. Start with Sprint Zero — a 2-week diagnostic to validate your spec risk-free.
First sprint: money-back guaranteed. Full build: finish-free if we miss scope. Written into your contract.