Public case
Available for new projects · reply within 24hTech Lead · Software Developer · Brazil
I turn ideas and projects into products and systems that drive real value.
I work from institutional websites to operational CRMs, connecting front-end, back-end, integrations, and architectural decisions in live products.
5+
years in production
4
featured fronts
Full
stack & product
Live in production
Antônio Carlos Jr.
Tech Lead · Full-stack · Brazil
Why me
Product vision with engineering structure to sustain real operations.
I don't just ship pretty screens. I take the entire product from mockup to real operations — with technical decisions, integrations, and impact clarity.
01
Tired of pretty mockups that break in production? I ship the whole product working — from concept to real user, without leaving tech debt behind.
02
Unmaintained integrations become bottlenecks. I connect payments, WhatsApp, ERPs, and critical flows with architecture your team can evolve on its own.
03
Product scaled into chaos? I bring architectural direction without killing speed — clear boundaries, real modularity, and decisions that survive the next quarter.
04
You need someone who speaks business, code, and operations fluently. I work from commercial funnel to infrastructure, connecting engineering to the impact your business needs.
Featured work
Cases that turn operational complexity into reliable product.
Selected cases showing technical depth, product direction, and real-world delivery.
Public case
Sereno
HealthTech and corporate wellbeing
Public case
Tracejo
LogTech and last-mile
How I operate
Engineering, architecture, product, and execution on the same axis.
01 / 03
Technical leadership
Reusable foundations, architectural direction, and team acceleration without losing consistency.
02 / 03
Software architecture
Modular modeling, separation of concerns, integrations, and safe evolution for products in production.
03 / 03
Impact-driven execution
Pragmatic delivery focused on business outcomes, operational reliability, and user experience.
Live stack
Tech that sustains what I deliver
.NET 8
ASP.NET Core
TypeScript
Next.js
React 19
Node.js
PostgreSQL
SQL Server
Supabase
Vite
Tailwind
Quartz
Z-API
Cielo
Sicoob
Vercel
Domains
Domains I deliver in depth
CRM and commercial operations
Funnel, leads, tasks, inbox, dashboards, and team workflows in operational products.
Events, ticketing, and validation
Purchases, batches, coupons, promoters, payments, and access control under high-usage scenários.
Health, institutional presence, and compliance
Authority websites, acquisition landings, NR-1 configuration, surveys, and admin journeys.
Case library
Large production projects can't be explained with a stack list.
The focus here is context, architectural decisions, role, and real impact.
FinTech and B2B credit
Volta
01A financial product that connects directly to the client's ERP, reads receivables, and releases approved anticipation within 4 minutes — with transparent rates.
FinTechAntecipaçãoB2BERP
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HealthTech and corporate wellbeing
Sereno
02A B2C+B2B product blending therapist matching, video sessions, emotional journaling and an anonymous psychosocial-risk panel for companies — fully compliant with NR-1.
HealthTechSaúde mentalTelemedicinaB2C+B2B
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Who's behind
Antônio Carlos Jr.
Tech Lead and Software Developer based in Brazil. I work full stack across .NET, Next.js, and React, connecting engineering, product, and operations.
I'm wired for live products: pipeline running, integrations working, teams shipping. Where there's real complexity, I step in to unlock it.
Manifesto
My delivery blends product vision, technical direction, and full-stack execution to take software from mockup to real operations, with enough structure to scale without becoming chaos.
Value delivered
Live product + clear architecture + sustainable execution.
Let's talk
If the challenge demands technical clarity and real delivery capability, I step in to unlock it.
Positioning, architecture, execution, and continuous evolution for products that need to work in production.