How do you price projects?

Fixed-price for clearly scoped work — typically a short paid discovery sprint that produces a scope brief first, then a fixed engagement quote from that brief. For open-ended or ongoing work, weekly retainer engagements are also available. Every quote includes a per-deliverable breakdown so you see exactly what you're paying for.

What's a typical project timeline?

An MVP SaaS or mobile app usually ships in 10–14 weeks. A full two-sided marketplace is typically 14–20 weeks. A discovery sprint is 1–2 weeks. We don't take 4-week crash jobs — they produce code nobody wants to inherit, including us.

Who actually writes the code?

The same senior engineers you meet on the first call. No work is routed to juniors, subcontractors, or offshore teams. Every pull request is reviewed by at least one other senior on the team before it merges.

Do we own the code and IP?

Yes, fully. Every engagement includes a standard IP-assignment clause in the contract. Code, designs, and infrastructure are yours from day one. We're happy to sign your NDA before the first call.

Can you work with our existing team or codebase?

Often, yes. We regularly join existing projects to add native mobile capability, rebuild a specific module, or shore up engineering practices (testing, CI/CD, code review). We do a short paid audit first and tell you honestly whether we're the right fit — and whether the project should be done at all.

What happens after launch?

Every engagement includes a 30-day post-launch window for fixes, tuning, and measurement against the original success metrics. Many clients continue on a monthly retainer after that for ongoing iteration, feature work, and on-call.

Accepting projects — Q2 2026

Design and engineering partner for founders shipping SaaS, marketplaces, and native mobile apps.

We design, build, and ship web platforms and native iOS + Android apps for founders and product teams — from discovery through launch and beyond. Senior engineers, weekly releases, no handoffs.

Start a project See our work

Senior-only teamWeekly staging releases30-day post-launch window

We ship with

Next.js·Node.js·TypeScript·Swift·Kotlin·PostgreSQL

About Vertex Stack

A senior team building serious software for founders and operators.

Vertex Stack is a senior-only engineering and design studio. We partner with founders and product teams to design, build, and ship SaaS platforms, two-sided marketplaces, and native iOS + Android apps — from discovery to launch and beyond.

Every project is led by the engineers writing the code — not account managers. We work in weekly release cycles, review every pull request, and stay on for a minimum 30 days post-launch to tune against success metrics.

See what we build How we work →

50+

Products shipped

Years building

Platforms (Web · iOS · Android · API)

100%

Senior engineers

What we build

Focused expertise in four areas.

Every engagement is led by senior engineers who have shipped at scale. No generalists, no handoffs to juniors, no offshore subcontracting.

SaaS platforms

Multi-tenant products with subscription billing, role-based access, and admin tooling — built to scale past the first 100 paying customers.

Multi-tenant data model · RBAC + audit logs
Stripe subscriptions + customer portal
Customer-facing analytics + admin console

Next.jsTypeScriptPostgreSQLStripeRedis

Marketplaces

Two-sided platforms with onboarding flows, escrow payments, reviews, and moderation tooling — designed for both sides from day one.

Buyer + seller onboarding with verification
Stripe Connect split payments + escrow
Moderation, reviews, and dispute tools

Next.jsStripe ConnectPostgreSQLAlgoliaAWS

Web applications

Custom internal tools, portals, and dashboards — typed end-to-end, tested, and fast enough for your power users.

Custom workflows + form engines
Real-time dashboards via WebSockets
Third-party integrations + API layer

Next.jsTypeScripttRPCPostgreSQLWebSockets

Native mobile apps

Swift for iOS and Kotlin for Android — native performance, proper design, and proper release through App Store + Play Store.

Native Swift + Kotlin (or React Native)
Offline-first + background sync
App Store + Play Store submission

SwiftKotlinReact NativeFirebaseGraphQL

Selected work

Shipped work — not mockups.

Recent SaaS, marketplace, and web engagements. Click any featured case study for a full technical breakdown.

Featured case study — FinTech SaaS

Micro Money Minded

Personal finance SaaS that turns daily spending awareness into long-term wealth — behavioral budgeting, AI insights, bank sync, and an offline-first installable PWA.

SaaSFinTechProgressive Web App

Problem

Traditional budgeting apps track spending but don't change behavior. Small repeated “micro-splurges” quietly cost users thousands per year.

Outcome

A production-grade freemium SaaS with behavioral journaling, AI insight pipeline, Stripe subscriptions, Plaid bank sync, receipt OCR, and an offline-capable installable PWA.

100+

REST endpoints

30+

Database models

15+

Background jobs

Integrations shipped

Next.js 16React 19Node.jsMongoDBRedisStripePlaidOpenAIAzure OCRFirebase

Read the full case study

Featured case study — Marketplace

Baytup

A trilingual (EN/FR/AR), dual-currency (DZD/EUR) rental marketplace unifying short-term stays and vehicle rentals — real-time messaging, local payment rails, identity-verified hosts, and a role-based admin console.

baytup.fr

MarketplaceReal-timeTrilingual (RTL)

Problem

Algeria's rental ecosystem was fragmented across classifieds, social groups, and offline agencies — no trust layer, no digital booking, and international platforms don't support local payments or full Arabic localization.

Outcome

A production marketplace live at baytup.fr unifying property stays and vehicle rentals, with identity verification, Socket.IO messaging, SlickPay local payments, and an admin moderation console.

Languages (EN / FR / AR)

Currencies (DZD / EUR)

40+

Notification event types

Core data models

Next.js 14React 18ExpressMongoDBSocket.IOGoogle MapsSlickPayJWT + OAuthNginx + PM2

Read the full case study

Featured case study — Marketplace

SkillStreamsConnect

A production SaaS marketplace connecting service seekers with verified providers — intelligent job routing, credit-based lead economy, Stripe-backed credit packs, Socket.IO chat, and a full admin console with audit logging.

skillstreamsconnect.com

Two-sided marketplaceReal-timeCredit economy

Problem

Directory sites force seekers to cold-call strangers. Lead-gen platforms sell the same lead to five providers in a race to the bottom. Neither side gets accountability, transparent pricing, or dispute recourse.

Outcome

A request-first, claim-based marketplace where complexity-tiered credits replace blind lead-selling, price confirmation prevents bait-and-switch, and an immutable audit log backs every moderation action.

~57K

Lines of code

30+

Notification types

Core data models

User roles

Next.js 15React 18Express 4MongoDBSocket.IOStripeNodemailerChart.jsPM2 + Nginx

Read the full case study

Featured case study — Vertical SaaS

VetRealm

A full-stack, multi-tenant SaaS platform for veterinary clinic management — appointments, medical records with dental charts, inventory, prescriptions, billing, team permissions, and analytics — with PayTabs-backed recurring subscriptions tuned for the MENA market.

vetrealm.com

Vertical SaaSMulti-tenantMENA subscriptions

Problem

Veterinary clinics across the MENA region still juggle paper charts, spreadsheets, WhatsApp bookings, and fragmented point-of-sale tools — while international PMS products ignore regional payment rails, Arabic-first UX, and local currencies.

Outcome

A cloud practice platform covering the full clinical workflow — appointments, pet medical records with dental charts, inventory, prescriptions, invoicing, and real-time team coordination — with PayTabs recurring subscriptions across seven MENA regions.

60+

React pages

Data models

20+

API modules

MENA currencies

React 19Express 5MongoDBSocket.IOPayTabsFullCalendarRechartsJWT + 2FATailwind

Read the full case study

More projects

2 shown

Representative projects from our archive.

SaaS

Cofoundr

Problem

Early-stage founders needed a structured way to match with technical co-founders.

Outcome

Shipped a curated matching product with profile vetting, intros, and async messaging.

Next.jstRPCPostgreSQLResendVercel

Web application

Entecity

Problem

Operations team was drowning in spreadsheets for dispatch, invoicing, and fleet tracking.

Outcome

Replaced 6 spreadsheets with one integrated ops console. Dispatch time down from hours to minutes.

Next.jsNode.jsPostgreSQLMapboxTwilio

Technology

A boring, proven stack — because reliability ships products.

We pick tools based on what the product needs, not what's trending on Twitter. Every choice is reversible, documented, and justified.

Frontend

Next.jsReactTypeScriptTailwind CSSFramer MotionRadix UI

Backend

Node.jsTypeScriptPostgreSQLMongoDBPrismatRPC

Mobile

SwiftSwiftUIKotlinJetpack ComposeReact NativeExpo

Infrastructure

AWSVercelDockerGitHub ActionsSentryCloudflare

Payments & Services

StripeStripe ConnectPaddleResendAuth0Mapbox

How we work

From first call to ongoing iteration.

A practical five-step engagement. No theatrical 50-page decks — just the artifacts you need to ship.

1
Discover
We map the problem, users, constraints, and success metrics. If it shouldn't be built, we'll tell you.
Scoped briefRisk mapBallpark timeline
2
Design
Wireframes, an interactive prototype, and a clear interaction model you can click through — before a line of production code is written.
Interactive prototypeComponent systemCopy draft
3
Build
Weekly releases to a staging environment. You see progress every week, not every quarter — and can course-correct before a direction hardens.
Weekly buildsFull CI/CDTyped end-to-end
4
Ship
Production launch, monitoring wired up, analytics instrumented, and App Store / Play Store submission if mobile is in scope.
Production launchStore submissionObservability
5
Iterate
We stay on for a minimum 30-day post-launch window to fix, tune, and measure against the original success metrics. Many engagements continue as a monthly retainer.
30-day fix SLAUsage reviewv2 roadmap

Why Vertex Stack

Senior engineering, end to end.

Four concrete things that separate us from a typical dev shop — with receipts.

Senior only

Every contributor has shipped a production product at scale. No juniors, no subcontractors, no chain of account managers. You work directly with the people writing the code.

100% senior engineers

Weekly shipping

New builds land in staging every week — not every sprint demo. You see progress continuously and can course-correct before a direction hardens.

Weekly staging releases

Typed, tested, reviewed

TypeScript end-to-end, automated test suites, and pull-request code review on every change. The code you inherit is code you can actually maintain — by your team or ours.

PR review + CI on every change

30-day post-launch

We stay on for a minimum 30 days after launch to fix, tune, and measure against the original success metrics. No 'thanks, goodbye' on release day.

30-day fix window included

What clients say

Working with senior engineers shows.

A few words from founders and product leads we've shipped with. Names omitted where not authorized — happy to make intros on request.

They joined mid-build, cleaned up three months of tech debt, and shipped what we'd been trying to ship for half a year. It's rare to find a team that's actually faster than working alone would have been.

Co-founder & CTO

Fintech SaaS · Series A

Our native iOS app now ships updates every two weeks. Before Vertex Stack, we were lucky to get one release a quarter out of our previous agency.

Head of Product

Healthcare mobile · Seed stage

We asked for a marketplace MVP in 10 weeks. They pushed back in week one on three features we didn't need, delivered the rest in eight, and the code review notes alone were worth the engagement.

Founder

Two-sided marketplace · Pre-seed

Contact

Tell us about your project.

A few details and we'll reply within one business day with honest next steps — not a sales pitch.

Frequently asked

Questions we get before every kickoff.

Don't see yours? The contact form has an open message field — send it and we'll reply within one business day.

Don't see your question? Ask it in the contact form →

Ready when you are

Let's talk about what you're building.

Tell us about the product. We'll reply within one business day with honest next steps — not a sales pitch, not a 20-page discovery template. Just the questions we need to answer.

Start a project See our work

Design and engineering partner for founders shipping SaaS, marketplaces, and native mobile apps.

A senior team building serious software for founders and operators.

Focused expertise in four areas.

SaaS platforms

Marketplaces

Web applications

Native mobile apps

Shipped work — not mockups.

Micro Money Minded

Baytup

SkillStreamsConnect

VetRealm

More projects

A boring, proven stack — because reliability ships products.

Frontend

Backend

Mobile

Infrastructure

Payments & Services

From first call to ongoing iteration.

Discover

Design

Build

Ship

Iterate

Senior engineering, end to end.

Senior only

Weekly shipping

Typed, tested, reviewed

30-day post-launch

Working with senior engineers shows.

Tell us about your project.

Questions we get before every kickoff.

Let's talk about what you're building.

Shipped work — not mockups.

Micro Money Minded

Baytup

SkillStreamsConnect

VetRealm

More projects

A boring, proven stack — because reliability ships products.

Frontend

Backend

Mobile

Infrastructure

Payments & Services

From first call to ongoing iteration.

Discover

Design

Build

Ship

Iterate

Senior engineering, end to end.

Senior only

Weekly shipping

Typed, tested, reviewed

30-day post-launch

Working with senior engineers shows.

Tell us about your project.

Questions we get before every kickoff.

Let's talk about what you're building.