AI agents and commerce systems, built to run in production.

Develari is the engineering studio of Ari Rocha, a senior engineer who builds AI agent harnesses every day and runs Mobiari, a commerce platform with WhatsApp, Instagram and Brazilian invoicing built in. For teams in the US and Brazil.

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years shipping software
12+
years shipping software
brands on platforms I built
300+
brands on platforms I built
built and run in production
Agents
built and run in production
commerce platform, live
Mobiari
commerce platform, live

What I build

Agents that take real actions, the commerce systems they act on, and the local pieces that make selling in Brazil work. Designed, shipped and operated by the same senior engineer.

AI agents

Agents that take real actions, not just chat. I build agent harnesses every day, so they hold up beyond the demo.

  • Harnesses, tool calling and retrieval
  • Evaluations, tracing and guardrails
  • Human handoff when the agent should stop

Conversational commerce

WhatsApp and Instagram wired into your catalog, orders and team inbox, on Meta's Business Platform.

  • WhatsApp templates, product messages and carts
  • One inbox for WhatsApp, Instagram, site chat and e-mail
  • AI assistant that answers and hands over to your team

Commerce & operations

The systems behind selling at scale: storefronts, inventory, purchasing and the integrations between them.

  • Multi-tenant commerce and checkout
  • ERP, marketplace and catalog sync
  • Inventory, recipes, purchasing and payables

Built for Brazil

Launching or operating in Brazil? The hard local parts, done right, by an engineer who speaks Portuguese and contracts through a US LLC.

  • NF-e electronic invoicing with SEFAZ
  • PIX and local payment flows
  • WhatsApp-first customer journeys

Work

Systems I designed, built and keep running. Not mockups: software with real stores, real orders and real customers on the other end.

Case study · Founder & sole engineer

Mobiari: a commerce platform for Brazilian retailers

I designed, built and operate Mobiari end to end. Stores run their online shop, stock, purchasing, invoicing and customer conversations in one place, with an AI assistant that answers customers and hands over to the team.

  • One inbox for WhatsApp, Instagram, site chat and e-mail, with templates, product messages, teams and SLAs
  • WhatsApp coexistence: stores keep the WhatsApp Business app and get their contacts and chat history in the inbox
  • NF-e electronic invoicing sent directly to SEFAZ-SP
  • Inventory with recipes and production runs, purchasing with supplier invoices and payables
  • Rust backend on AWS Graviton, infrastructure as code, every merge deployed
Visit mobiari.com
Mobiari inbox: a website chat where the team answers with product cards

Senior full-stack · 2024

Deezign: a commerce network for 300+ brands

Led the backend and frontend modernization of a multi-brand commerce platform handling thousands of daily transactions.

  • 60% lower API latency with caching and infrastructure tuning
  • Online and in-store sales in one analytics view
  • Catalog sync between ERP, marketplaces and marketing feeds

Ongoing

AI agents in production

My day-to-day work is building harnesses for AI agents: the orchestration, tools, evaluations and guardrails that make an agent dependable once real users and real systems are involved.

  • Tool orchestration and long-running agent loops
  • Evaluations and tracing to catch regressions before users do
  • The same approach powers Mobiari's customer assistant

Who you work with

Portrait of Ari Rocha

Ari Rocha

Founder & principal engineer

I've spent 12+ years designing, shipping and operating web platforms for SaaS, commerce and construction tech, from freelance builds for startups worldwide to multi-brand commerce and 3D platforms.

Today I build harnesses for AI agents and run Mobiari. Develari is how I take on a few client projects at a time, hands-on from architecture to production, in English or Portuguese.

LinkedInGitHubarirocha.com
“I met Ari about a year ago, and since then, I haven't thought about switching. He is extremely attentive, agile, and offers excellent value for money. I have completed several projects with him, including a highly complex bot for Discord, which turned out flawlessly.”
Bruno Felipe, CEO at OSG

Founder-led, production-focused

You work directly with me, from the first architecture sketch to the system running in production. No account managers, no hand-offs to a junior team.

Architecture & planning Clarify requirements, model data flows, and design systems that can evolve without rewrites.

Build & ship Deliver features with a focus on maintainability, tests, and pragmatic performance.

Operate & scale Observability, reliability, and cost-aware scaling — so your team can run the system confidently.

Ways to work together

Project

Fixed scope: an agent, an integration or a product, from design to production.

Monthly

Ongoing senior engineering inside your team, with reserved hours each month.

Technical lead

Architecture, reviews and technical decisions for teams that are growing.

Let's talk about what you're building

An AI agent that has to work beyond the demo, a WhatsApp or commerce integration, or a product to launch in Brazil: book a 30 minute call.

Schedule a callEmail Develari

Common questions

A few practical details about how Develari engagements work.

Engagements

Security & compliance

Collaboration

Need more help? Contact Develari