Builds
SoftwareEngineering
Custom systems and products.
- 01.1Systems, dashboards and automation for what lives in spreadsheets
- 01.2SaaS and MVP, from the idea to a first version with customers
- 01.3APIs and integrations between systems
AI-First Engineering · AI planned from day one
Software and AI woven into the processes your company already has.
Custom systems, AI agents and integrations, built to the standard of someone who spent 10 years on critical systems. Plus guidance so your team can run what was delivered.
- 10 years in critical systems
- Banking · telecom · healthcare
- Based in Brazil · remote work
What you can expect
No throwing away what already works. Weft steps into the process your company already has and takes care of what slows down the daily work, with someone from your team always in control.
Lucas Palhares Barbosa, founder
Weft: the threads that run across a fabricThe thread that runs through what already exists and makes the pattern appear.
Services
Three lines. One engineering standard.
Weft builds in the first two and guides in the third. You can hire one or combine them.
Builds
AIEngineering
AI working in operations, not just in slide decks.
- 02.1Agents that carry out tasks end to end
- 02.2An assistant over the company's knowledge base
- 02.3AI inside the system you already have
Guides
Consulting
Assessment and team training.
- 03.1Technical and AI assessment with a 90-day plan
- 03.2Mentoring tracks, building together with the team
- 03.3In-company workshop for up to 10 people
Who is behind it
Lucas Palhares Barbosa
One person. Critical system standards.
Founder · Tech Lead & Software Engineer
10 years building systems that cannot stop, in banking, telecom and healthcare. Today he applies AI Engineering (engineering systems with AI: agents, automation and specification-driven development) every day, in real environments, with deadlines, teams and legacy systems. Weft was founded to bring that standard to companies of any size.
- 10 years
- Banking · telecom · healthcare
- Applied AI every day
- Rio Preto (SP), Brazil
How he works
- 01
Prototype approved before a single line of code.
Shoe repair shop project - 02
If software or AI doesn't move the number, I say so too.
First call - 03
A method born from practice, not from courses or theory.
About the founder
Ideas
What he writes about AI.
Short articles on AI engineering, from someone who applies it every day in real systems.
See all articles →- QualityHow to measure whether an AI assistant gets it rightA test with real questions before putting the assistant in front of anyone. The score did not change, and that was the most useful measurement of the project.Read the article
- BusinessThe ROI of generative AIROI is the return on investment. Where it shows up, where it disappears, and why measurement has to be born with the project.Read the article
- RAGRAG fails in the plumbing, not in the modelWhen the assistant gets it wrong, the problem is usually in the path the data takes to reach it. Two real cases from one of my projects.Read the article
- CareersAI Engineer, ML Engineer and data scientistThree roles that often get mixed up when building a team. Working with AI is not always the same job.Read the article
- RAGRAG or GraphRAG: when each one is worth itTwo ways for AI to consult company documents before answering. The choice is not about technology, it is about architecture.Read the article
How it worksdemo
See an agent from the inside.
A demo case: a supplier invoice arrives by email.
- 01Reads the documentOpens the invoice PDF and pulls out supplier, amount and due date.
- 02Checks against company dataCompares it with the purchase order and the supplier record.
- 03Acts with a person approvingPrepares the entry. It only counts after someone in finance approves it.
Projects
What Weft is already building.
No made-up testimonials. Only what exists, at the stage it is in.
Who already works with Weft
Support in the iFood certification
Technical support in the certification meeting of Entregas Flex as an iFood partner (iFood is a Brazilian food delivery app), with access to the official APIs.
deliveredA management system instead of a notebook
Work orders, customers and cash register. Prototype approved by the owner before a single line of code.
in progressOnline booking
Discovery under way: mapping what goes into the first version and how to measure the result.
in discoveryA 30-minute call answers the first question.
No corporate pitch. You bring the process, I tell you whether software or AI moves the number. And if it doesn't, I tell you that too.
- Free first call, 30 minutes by video
- A slot in Lucas's calendar or a reply by email within 2 business days
- Prefer email? contato@weftsystems.com.br
Pick a slot
Free slots in Lucas's calendar, in Brasília time (UTC-3).
Prefer to send a message?
Lucas replies within 2 business days, at the email you leave.