01
Custom web platforms
SaaS products, portals, and internal tools built for real operational load.
- SaaS & multi-tenant apps
- Institutional portals
- Internal tools & back-offices
Software engineering studio · Brazil → Worldwide
We build thesoftware youroperation runs on.
Custom web platforms, APIs, workflow automation, and data & AI products — designed, engineered, and shipped end to end, from discovery to production.
Founded by João Paulo Santos- Live platforms and products
- 04
- Project write-ups
- 14
- Bilingual delivery
- EN · PT
- Overlap with US & EU hours
- UTC−3
- TypeScript
- Python
- Django
- SvelteKit
- React
- Astro
- Tailwind CSS
- PostgreSQL
- Neon
- Supabase
- Cloudflare Workers
- Docker Swarm
- Three.js
- deck.gl
- Mapbox
- XGBoost
- Stripe
- HTMX
- Sentry
- Playwright
Web platforms, APIs, Automation, Data, Geospatial, Applied AI, Cloud, DevOps
01Services
Engineering for the systems that matter to your business.
One team from architecture to deployment. We take on the hard parts — data models, integrations, reliability — so your product ships and keeps working.
02
APIs & integrations
Clean contracts between your systems, with guarded failure modes.
- REST APIs & BFFs
- Payment & business-system integrations
- Webhooks & event pipelines
03
Workflow automation
Replace spreadsheets and manual hand-offs with pipelines that run themselves.
- Process automation
- Scheduled jobs & ETL
- Reporting & reconciliation workflows
04
Data, geospatial & ML
Turn weather, map, and operational data into decisions.
- Geospatial apps (Mapbox, deck.gl)
- Forecasting & risk models
- Dashboards & KPIs
05
Applied AI
LLM features that improve a real task — not a generic chatbot.
- LLM features & agents
- Source-grounded retrieval
- Usage metering & cost controls
06
Cloud, DevOps & reliability
Edge-first deploys, containers, CI, and observability from day one.
- Cloudflare Workers & Pages
- Docker Swarm & Portainer
- CI/CD with automated tests
02Selected work
Software built for real operations.
Platforms for agribusiness, education, innovation ecosystems, and operations teams — each with a documented problem, decision, and outcome.
Explore all projects- 2026
Moto Track
A live SvelteKit SaaS web application for motorcycle operations, covering fuel, maintenance, documents, costs, professional shifts, and profitability with Neon and Cloudflare.
Live SaaS
Product status
Capabilities
- Fuel, maintenance, tires, documents, reminders, and expenses
- Professional shifts, work costs, and profitability reports
- SvelteKit
- TypeScript
- Neon Postgres
- Cloudflare
- Stripe
- 2026
AgroHub UniRV
A live Django web portal for UniRV's startup ecosystem, events, services, and public-access channels, built as a fast, maintainable institutional home.
Startups · events · services
Portal scope
Capabilities
- Public directory of incubated startups
- Events calendar for mentorships, workshops, and pitch days
- Python
- Django
- HTMX
- Tailwind CSS
- Alpine.js
- 2026
Inova Rio Verde
A live geospatial web application that turns Rio Verde's hubs, incubators, and programs into an explorable citywide innovation trail.
Citywide innovation trail
Product surface
Capabilities
- Interactive geospatial 'Innovation Trail' mapping the local ecosystem
- Edge-optimized Postgres access via Cloudflare Hyperdrive
- Next.js
- Tailwind CSS
- Mapbox
- MapTiler
- deck.gl
- 2026In development
Lorebound
A reader-first interactive-fiction web platform that pairs curated story worlds with controlled AI turns, persistent memory, and transparent usage.
Story packs
Reader model
Capabilities
- Curated worlds set the tone before an AI turn extends it
- Reader choices and memory inform the next chapter
- TypeScript
- React
- Neon Postgres
- Drizzle
- Cloudflare Workers
- 2026Private source
ClimAgro
ClimAgro UniRV, coordinated by Prof. Dr. Gilmar Oliveira Santos, brings together weather data and climate analysis to support agricultural planning in Rio Verde.
Daily + hourly
Weather resolution
Capabilities
- FAO-56 evapotranspiration and water-balance calculations with historical warm-up
- Paired INMET producer and Django consumer with contract-drift checks
- Python
- Django
- JavaScript
- PostgreSQL
- INMET
- 2026
Throughline
A privacy-first React PWA planner that keeps goals, tasks, notes, boards, and timelines usable offline, with optional encrypted sync across devices.
Local data remains usable
Offline behavior
Capabilities
- Goals roll up task progress instead of sitting beside disconnected to-dos
- Notes cross-link to tasks and goals
- React
- TypeScript
- IndexedDB
- PWA
- End-to-End Encryption
03Process
A delivery process you can see every week.
No black boxes. Scope is explicit, decisions are written down, and working software lands on a staging URL from the first sprint.
- Step 011–2 weeks
Discovery & scope
We map the operation, the users, and the constraints, then turn them into a scoped plan with priorities, risks, and a clear first milestone.
Outputs
- Technical scope
- Risk map
- Milestone plan
- Step 021–2 weeks
Architecture & design
Data model, integrations, and interface flows are designed before the build, so there are no expensive surprises halfway through.
Outputs
- Data model
- UX flows
- Decision log
- Step 03Weekly cadence
Build in sprints
Weekly increments on a live staging environment. You review working software every week, not status slides.
Outputs
- Staging URL
- Weekly demos
- Automated tests
- Step 04Ongoing
Launch & evolve
Production release with monitoring and documentation, then either a clean hand-off to your team or continuous evolution with us.
Outputs
- Production release
- Runbooks
- Support plan
04Under the hood
Engineering standards, not afterthoughts.
The quality bar that ships with every project — the same one this website is built on.
// edge/api/orders.ts — typed, validated, observableimport { z } from 'zod';import { withTracing, problem } from '@/lib/platform'; const Order = z.object({ customerId: z.string().uuid(), items: z.array(LineItem).min(1),}); export default withTracing(async (request, env) => { const body = Order.safeParse(await request.json()); if (!body.success) return problem(422, body.error); const order = await env.DB.orders.create(body.data); await env.QUEUE.send({ type: 'order.created', id: order.id }); return Response.json(order, { status: 201 });});typecheckunite2ea11ydeploy → edge
Type-safe end to end
Strict TypeScript and validated boundaries between client, API, and database.
Performance budgets
Static and edge-first delivery with Core Web Vitals tracked in production.
Accessible by default
WCAG 2.1 AA as the target: keyboard paths, contrast, and reduced-motion support.
Observable in production
Error tracking, structured logs, and real-user metrics from the first deploy.
Tested pipelines
Unit and end-to-end tests run in CI before anything reaches production.
Secure by design
Least privilege, bot protection, and encryption where user trust depends on it.
Reference architecture
L1Interface
- Astro
- SvelteKit
- React
- HTMX
- Tailwind
L2Application
- Django
- Workers
- REST / BFF
- Queues
L3Data
- Postgres
- Neon
- Supabase
- IndexedDB
L4Infrastructure
- Cloudflare
- Docker Swarm
- CI/CD
- Sentry
05Sectors
Domains we already know.
Context shortens projects. These are the domains we have built for — live platforms, research, and prototypes, each with its status stated on the case study.
Innovation & education
Portals and ecosystems for universities, incubators, and public innovation programs.
Related work
Operations & services
Software for individual riders and field work, plus a customer self-service prototype for service companies.
Related work
Digital products & AI
Consumer products with privacy, offline capability, and AI at the core.
Related work
06Engagement
Pick the model that fits the stage you are in.
Every engagement starts with a short discovery call and a written proposal.
- 01
Scoped project
Best for: New products, portals, and MVPs
A defined scope delivered in milestones, with discovery included and a complete hand-off at the end.
- Discovery included
- Milestone-based delivery
- Source code & documentation hand-off
- 02Recommended
Product partnership
Best for: Products that keep evolving
Dedicated monthly capacity to build and evolve your product continuously, with a shared roadmap.
- Weekly delivery cadence
- Shared roadmap ownership
- Priority support
- 03
Technical consulting
Best for: Existing systems that need a plan
Architecture reviews, audits, and recovery of stalled projects, ending in an actionable plan.
- Code & architecture audit
- Performance & accessibility review
- Prioritized remediation plan
07FAQ
Questions companies usually ask.
How big is the team?
JPCLOW is founder-led by João Paulo Santos. When a project needs additional expertise, independent specialists can be brought in for a defined scope.
What kinds of companies do you work with?
Startups validating a product, established companies modernizing internal processes, and institutions that need reliable public-facing platforms — in Brazil and abroad.
How does a project start?
With a short discovery call. Then you receive a written proposal with scope, milestones, timeline, and a clearly defined first deliverable.
Can you take over an existing system?
Yes. We start with a technical audit, stabilize the critical paths, and then evolve the product incrementally instead of proposing a rewrite by default.
Which technologies do you use?
We choose per problem. Our defaults are TypeScript, Python and Django, SvelteKit, React, Astro, PostgreSQL, and Cloudflare.
Do you work remotely and in English?
Yes. We are remote-first from Brazil (UTC−3) and work in English and Portuguese, with working-hour overlap for teams in the Americas and Europe.
How do I request a proposal?
Use the contact form or email [email protected] with a short description of the problem, your timeline, and any existing systems involved.
Next step
Have a system to build or a process to fix?
Tell us about the problem. You get a first technical read, a suggested path, and next steps.