FastFlow
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FastFlow

Full-stack development agency: mobile apps, websites, and custom portals. Lean team, direct process, code that stays yours.

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© 2026 FastFlow Agency. All rights reserved.
Crafted carefully in Boston.
Accepting 2 new projects · Q2 2026

Your competitor is already shipping. Are you?

Mobile apps, websites, and custom portals — delivered by a lean team that owns the code from brief to deploy.

Let's build togetherView projects
20+Projects shipped
48hBrief → proposal
4-6 wksAvg MVP
Web · MobileStack
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Solutions

Five lanes, one team.

We're not the agency that only does websites. Or only apps. We work the five lanes a digital product needs to grow — keeping the same craft from end to end.

  • 01

    Apps that ship to the store

    iOS and Android apps that don't crash, don't lag, and don't need you to push a new release.

    • React Native + Expo
    • Flutter
    • Swift / Kotlin
    • Push, billing, deep links
    • App Store + Play Store
  • 02

    Web apps that scale

    SaaS, dashboards, and web products that hold up to the first million users without a rewrite.

    • Next.js + TypeScript
    • Postgres + Drizzle / Prisma
    • Stripe, Resend, S3, auth ready
  • 03

    Sites and landings that convert

    Marketing sites and landings that load in seconds and were built to close.

    • Lighthouse 95+ guaranteed
    • A/B testing and analytics
    • Optional Visual CMS
  • 04

    Custom portals that work

    Admin panels, internal portals, and operational tools designed around your process — fully custom.

    • Admin panels + permissions
    • Automations and integrations
    • Audit, billing, multi-tenant
  • 05

    Continuous growth

    After go-live, we stay. Marketing tech, experimentation, analytics, and iteration based on real data — not guesses.

    • Email lifecycle
    • Tracking + attribution
    • Monthly experiment loops
Projects

What we're building.

A small selection of work we're proud of — modern admin portals, AR-powered apps, editorial marketing sites. The full set lives on the cases page.

Dashboard of ADVEC Boston admin portal with modules for events, reports, bookstore, and volunteers
PortalLive
ADVEC Boston

Admin portal that runs an entire church

Centralizes events, members, giving, and volunteers for a church in Boston in one place.

TypeScriptExpress 5React 19 + VitePostgreSQL + DrizzleBootstrap 5.3ResendTwilioGoogle MapsPWA + Workbox
View project
AxoLens app mockup on Android showing the home screen with property library, boundary import, and live flight view
Mobile AppIn development
AxoLens

Drone app that overlays property boundaries in real time

Native Android app for DJI drone pilots: imports property boundaries (KML/KMZ) and projects them onto the live video feed in real time, with terrain-aware accuracy via USGS 3DEP.

KotlinDJI MSDK 5OpenCVUSGS 3DEPOSMDroidFirebase Auth + FirestoreRevenueCatVitest
View project
HavenClean site with the hero "A spotless space, without the hassle", a 5.0-on-Google rating, and an instant-quote CTA
WebsiteLive
HavenClean

Website that turns search into bookings

Marketing site and admin platform for a cleaning company across Boston, Orlando, and Miami — instant online quotes, a bookings-and-leads backend, bilingual (EN/ES), and technical SEO from day one.

Next.js 16React 19PostgresDrizzleTailwind
View project
Process

How we work.

Five stages. No mystery in the process. No meeting without an agenda. You follow every product decision — week by week.

  1. 01

    Discovery

    We understand your idea, your audience, and what really matters. We leave with scope, timeline, and budget — no fine print.

  2. 02

    Design

    Technical architecture, flows, wireframes, and identity. You navigate a prototype before the first line of code.

  3. 03

    Build

    Short sprints with continuous deploys to staging. You follow along week to week — no mystery in the process, no launch surprises.

  4. 04

    Launch

    Go-live with monitoring, metrics, and on-call support. The first week in production is the most important — and we're in it with you.

  5. 05

    Evolve

    After launch, monthly evolution cycles. Real data, A/B tests, and continuous improvement based on what users actually do.

FAQ

Questions, answered

The things prospective clients ask most, answered plainly. Still unsure about something? Email [email protected] and we'll get back fast.

Start a project

Tell us the idea — we'll come back with a plan.

Three short steps. We use what you share to send back initial scope, a realistic timeline, and what it takes to start — usually within one business day.

Step 1 of 3

What are we building?(select all that apply)
Budget
When would you like to start?
“
They took on the parts other studios wouldn't touch: real-time AR over a DJI feed, terrain-corrected geodesy across the entire US. Sub-meter precision on real hardware, working builds every week, no hand-waving. Best engineering call we've made.
Daniel Karalash·Dronial
“
They took on the parts other studios wouldn't touch: real-time AR over a DJI feed, terrain-corrected geodesy across the entire US. Sub-meter precision on real hardware, working builds every week, no hand-waving. Best engineering call we've made.
Daniel Karalash·Dronial
Or skip the form:[email protected]WhatsApp · +1 (603) 479-2115
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