AISoftware Studio · Philippines → Worldwide

Software that fits your business.

From AI and automations to CRMs, ERPs and whatever your operation needs — custom software, built around how you actually work.

Founder-led · weekly sprints · full code ownership
Active Builds

The companies we'rebuilding
for right now.

Engineering partner to ambitious founders and operators across multiple industries — shipping production-grade software on a weekly sprint cadence.

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// 01 — What we build

Eight builds,
one philosophy.

We sit with your team, map the actual workflow, then decide which of these eight shapes the right build. No retainer treadmill, no feature-stuffing.

01 / AI SOFTWARE

Custom AI products, built for one business.

Internal copilots, document understanding, intelligent search, agentic workflows — grounded on your own data.

RAGAgentsVector searchFine-tuning
02 / AUTOMATIONS

The boring work, quietly handled.

Lead routing, invoice extraction, onboarding flows, multi-app syncs. Replaces the spreadsheets glued between your tools.

n8nZapierWebhooksWorkflow AI
03 / CRM

CRMs that match how you actually sell.

Pipelines, fields and reports built around your real sales motion — not a 2,000-feature platform you'll use 4% of.

Custom pipelinesAI scoringMigrations
04 / ERP

Operations software without the SAP-tax.

Inventory, ops, finance and HR in one place. Modular, cloud-native, priced for an SMB. Start with one module, expand on numbers.

InventoryFinanceHRReporting
05 / AI INVENTORY

Inventory that predicts itself.

Stock levels, reorder points and demand forecasts your team can trust. Multi-branch, multi-SKU, AI-tuned to your sales cycle.

ForecastingReorder AIMulti-branch
06 / E-COMMERCE

Storefronts wired to your back office.

Custom commerce — Shopify, Medusa or fully bespoke — connected to your inventory, accounting and CRM so nothing falls between systems.

ShopifyMedusaHeadlessPOS
07 / AI ACCOUNTING

Books that close themselves.

AI receipt + invoice ingestion, auto-categorization, reconciliation, and Xero/QuickBooks sync. Audit-clean, month-end in hours.

OCRAuto-reconcileXeroQuickBooks
08 / EMR

Clinical software, built for your practice.

Patient records, scheduling, charting and billing tailored to your clinic. HIPAA-aware, mobile-ready, with AI note-taking and triage.

ChartsSchedulingBillingAI scribe
// 02 — How we work

From “let’s talk” to live in 4–8 weeks.

Fixed-scope sprints, weekly demos, and a working pilot in your hands before we ever scope a phase two. No 90-page SOWs.

01 / WEEK 1

Discovery

Working sessions where we shadow your team, map the workflow, and identify the 2–3 highest-leverage builds.

workflow audit
data inventory
ROI sizing
02 / WEEK 2

Blueprint

One-page architecture, a clickable prototype, fixed price and date. You approve before a line of code ships.

system diagram
UI prototype
fixed-bid SOW
03 / WEEK 3–6

Build

Weekly demos every Friday. You see real, working software each week — not status decks.

weekly demo
staging env
shared Slack
04 / WEEK 7–8

Pilot & ship

A pilot with your team. We train, document, and hand over keys — or stay on a support retainer.

team training
runbook + docs
30-day warranty
// 04 — Why teams choose us

A different kind of agency.

We're a small senior team — no junior account managers, no offshore handoff, no 30-page status decks. You talk to the people building your software, every week.

// dimension
Typical agency
BuildFastLabs
Time to first working software
3–6 months
Weeks, not months
Pricing model
Hourly, scope creep
Fixed bid per sprint
Who you talk to
Account manager
The lead engineer
AI in the stack
Buzzword on the deck
In production, evaluated
What happens after launch
You're on your own
Owned code + 30-day warranty
// Meet the founder

The engineer behind every BuildFast build.

Carl Saguinsin - Founder and Tech Lead at BuildFast Labs

BuildFast Labs is led by Carl Saguinsin — a senior software engineer and AI specialist who has spent years building products that ship, scale, and win. The team is small by design — focused, accountable, and led by Carl at every level.

You won't get handed off to juniors after onboarding. The person who scopes your project is the one who builds it — Carl reviews every line of code, and you work directly with the engineer doing the actual work, never a project manager reading you status updates.

Career Highlights

Founder CEO and CTOPresent
BuildFast Labs
Senior Software Engineer
Keep It Simple OS
Fractional Tech Lead
Design Source Media
Lead Software Engineer
SmartOutSourcing Solutions
Co-Founder/CTO
Craftora

Recognized for engineering and AI excellence:

🏆
Grand Champion
KMC Hackathon 2024

Won the top prize at KMC's Talent Matchmaking Challenge hackathon, developing innovative AI-powered HR solutions.

🥉
3rd Place
Kaya Founders Hack the Future 2024

Secured third place in technology innovation competition focused on building solutions for a better future.

🎯
Finalist
CodeBreak – Arbolo AI Hackathon 2025

Reached finals in AI-focused hackathon, showcasing innovative solutions in artificial intelligence and machine learning.

🏅
5th Place
The New Era of Banking 2025

Achieved top 5 finish in fintech innovation challenge, developing cutting-edge banking technology solutions.

Want to talk to Carl directly before committing to anything? That's exactly how he likes to start.

// 05 — FAQ

Questions
we get a lot.

Don't see yours? Ask on the discovery call →

Do we own the code?+

100%. Repo, infrastructure, docs and runbooks are handed over the day we ship. We never lock you in.

We're not in the Philippines — does that matter?+

Most of our clients aren't. The team overlaps with US (PT/ET morning), EU (afternoon), and APAC (full day). We schedule weekly demos in your timezone, not ours.

Which AI models do you use?+

Whichever wins your eval. We benchmark across Anthropic, OpenAI, Google and open models per task — cost, latency and accuracy on your data, not ours.

Where does our data live?+

Your cloud, your account. We deploy into your AWS / GCP / Azure tenant by default — or your VPS if you prefer. We never train shared models on your data.

What if it doesn't work out?+

Discovery has a kill switch — if the blueprint doesn't excite you, you walk away with it and we part ways. Build sprints carry a 30-day warranty after ship.

// 06 — Let's talk

Let's build software that fits you.

30 minutes, no pitch deck. We'll talk through your workflow and tell you — honestly — whether custom software is worth it for you.

Fastest Way to Start

Talk Directly with the CEO

Skip the wait. Get answers immediately.

30-minute strategy session
1-on-1 with founder Carl Saguinsin
Get your questions answered live
Leave with a clear action plan
Start your project this week
Response timeInstant

No commitment required. 100% free.

Send Us a Message

Prefer async? Send us a message instead.

Response timeWithin 24 hours

Or reach out directly

No commitment. No contracts until you're ready.
Full code ownership — always.
NDA available on request.