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Matheus Weber
From Brazil 03:49 PM (GMT-03:00)
$30/hr or $140,000/yr
Active 1 hour ago

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Senio

iOS Developer
Available for hire
Years of experience
11+ years
Experience level
Staff
Available for
Full-time, Part-time, Contract, Freelance
Available from
10 Oct 2026

I'm a Staff-level software engineer from Porto Alegre, Brazil (UTC-3), with 10+ years of experience and iOS work since 2015. I've shipped mobile, backend and AI systems at Uber, DoorDash, Microsoft, PicPay and IBM, at the scale of 200M+ monthly users.

At Uber I led safety-critical in-app audio and video recording across iOS, Android and backend. At DoorDash I led iOS on the Trust & Safety Platform for 8M active Dashers and cut crashes by 27%. At Microsoft I built a GenAI chat assistant for Itaú's banking app (30M users) and a RAG system for Brazil's stock exchange. At PicPay I led the platform observability team and cut incident detection time by 63%.

What makes me unique is that I cover the whole stack. I go from Swift/SwiftUI and Kotlin to Go, Python and TypeScript backends, to LLM systems (RAG, agents, MCP). I'm also doing a Ph.D. in Computer Science at UFRGS on LLMs for education. Outside work I ship my own products solo, including CosmoKit on the App Store and an AI-orchestration cockpit for coding agents.

I'm looking for a remote Staff/Senior role in mobile (iOS), full-stack or AI engineering, where I can own hard problems end to end and mentor others.

Skills

TypeScript React.js Node.js Docker AWS Azure Kubernetes Terraform PostgreSQL Python Go Kotlin Swift SwiftUI

Languages

English Portuguese

Employment History

Senior Software Engineer (E5) at DoorDash Current 2025 - Now
Led iOS on the Trust & Safety Platform (compliance and regulatory readiness) across the Dasher, Wolt and Deliveroo apps, serving 8M active Dashers. Led the Nexus migration unifying all safety, trust and regulatory features into one surface, and drove the Monarch migration and Compliance Evaluation refactor (3x fewer duplicated requests, 27% fewer crashes). Authored 30+ cross-team RFCs on SDUI, mobile compliance and regulatory readiness. Built DashPilot, an internal AI-orchestration dev cockpit (Go + Next.js) routing work across Claude, Codex and Cursor CLIs.
Staff Software Engineer, Platform Team at PicPay 2023 - 2023
Led the observability platform team (iOS and Android): CI/CD pipelines, monitoring dashboards and alerting, cutting incident detection time by 63%. Defined cross-platform telemetry standards adopted by 30 feature teams and mentored engineers and interns.
Backend Engineer & Full-Stack Lead at Microsoft 2023 - 2025
Itaú PIX Payment Platform (backend): services for Brazil's instant-payment system, 20M+ transactions/year for 100M+ users, on Azure (AKS, CosmosDB, Service Bus) and AWS (EKS, DynamoDB, SQS) with Terraform and HA/DR patterns. Copilot for B3 (full-stack): RAG system for Brazil's stock exchange with Python (Quart, Flask), vector search, CosmosDB, Service Bus and a React frontend with Entra ID. AI Chat for Itaú (iOS lead): GenAI conversational assistant for 30M users with low-latency streaming UX.
Senior Software Engineer / Tech Lead (E5) at Uber 2020 - 2023
Led safety-critical In-App Audio & Video Recording across iOS, Android and backend, protecting 200M+ monthly active users. Owned end-to-end architecture (Swift, Kotlin and backend services) and established alerting and on-call practices for the safety domain. 3x mentor in Uber Career Prep.
Senior Software Engineer at IBM 2017 - 2020
Led mobile development for Santander's safety features and re-architected the safety component, improving security posture and critical-path latency. Directed the Vidalink iOS app end to end and mentored 5 engineers.
iOS Developer at Brave 2015 - 2017
Led iOS client projects.

Education

Ph.D. in Computer Science (in progress), LLMs applied to education platforms at Universidade Federal do Rio Grande do Sul (UFRGS) Current 2026 - Now
M.Sc. in Computer Science, AI Specialization at Universidade Presbiteriana Mackenzie 2019 - 2021
B.Sc. in Computer Science (exchange: University of Liverpool, 15 months) at Universidade Federal de Pelotas (UFPel) 2012 - 2017
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