Software Engineer · Custom systems and cloud
Your company outgrew the tools holding it together.
Custom systems, websites that bring enquiries, and AWS architecture. For companies that no longer fit the tools they started with.
- A free 45-minute walkthrough
- Fixed price per stage
- Yours, in your own account, documented
Which one is you?
I work with three kinds of people. Pick the one that sounds like you and we start there.
You run a business
My operation lives in spreadsheets and it can't take any more.
The company works, but the system is holding it back: duplicated information, nobody knows which file is the good one, and every month hours go into something that should run on its own.
- Closed timeline in the proposal, before you decide
- Fixed price per stage
- Yours, in your account, documented
You need a website
I need a website that brings in clients, not one that just exists.
A site that shows what you do, loads fast on a phone and shows up when someone searches for you on Google or asks an AI. And tells you how many enquiries it brings, not just how many visits.
- Online in 1 week from your content
- Fixed price per stage
- Site, domain and analytics in your name
You have a product
I need a senior who can carry the engineering.
You have something running and you need someone to make the architecture calls, own the fact that they hold up, and not leave you with technical debt nobody can explain.
- Closed timeline in the proposal, before you decide
- Fixed price per stage
- Infrastructure as code, in your account
This is already running.
Runs on
- AWS
- Terraform
- PostgreSQL
- NestJS
- Angular
- Stripe
I am a partner and the technology lead at Brault. I make the architecture and infrastructure decisions and I am the one who carries them out: the cloud, the backend, the database and everything that keeps it standing day to day.
Brault is a platform where several people work on the same information at once, with a search that understands what it is asked and subscription billing that runs on its own.
We started it in 2024 from nothing, not a line written, and today it is a profitable business. It is not a portfolio project or a demo: it is a product in production, with customers paying every month.
“You will know what you are buying, what each stage will cost before it starts, and what you keep when it ends. If your problem is not my kind of problem, I will tell you on the first call.”
Sebastián FermanelliSoftware Engineer · Custom systems and cloudHow we would work.
Four steps, always in this order.
Diagnosis
Five questions about how the work really runs today, before anything is proposed.
Proposal
The process written down: who does what and in what order, on paper and signed off by you.
Development
Something working every two weeks, not six months in the dark.
Handover and support
It ends up in your own account, documented, with the infrastructure as code.
Who is on the other side.
I am Sebastián, a software engineer based in Rosario, Argentina. I build software that has to survive in production.
Since 2024 I have led Brault’s architecture and development end to end. Before that I worked on backend at 3Logic and on test automation at Solvd; before that, and still today, at UTN Rosario.
After a few years building in production, what I learned is useful to other teams. That is why I opened up consulting.
I work with companies across Argentina and, in English, with clients abroad.
See my LinkedIn profileRead this before you decide.
I write about how to decide well before spending on software.
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Let's start.
Tell me in two lines what you have on your hands. The first call is 45 minutes, free: that is where we work out how we would do it and what it costs. I reply within 48 hours. I am based in Rosario, Argentina, and work with companies anywhere.