Lucas Siqueira

Product Engineer — São Paulo, Brasil

Software engineer with 8+ years of experience — from enterprise IT infrastructure and high-scale fintech, to leading engineering teams and now building AI. I've always found a way to own problems bigger than my initial title. Today I'm a Product Engineer at Tela, shipping the LLM-powered automation systems that help Brazilian enterprises eliminate entire workflows.

Experience

TelaProduct Engineer
2024 – present
Building AI agents and workflow automations for enterprises.+

Tela is an AI-native enterprise automation platform — lets companies build, deploy, and monitor intelligent workflow automations with LLMs. Founded in 2023, with clients like JusBrasil, Vórtx, and Unimed CBS. As a Product Engineer, I work alongside founders, designers, and stakeholders: from shaping requirements and user experience to owning delivery end-to-end.

+ skills
TypeScriptPythonVue/NuxtLLMsAI AgentsPrompt EngineeringSystem DesignProduct Development
Pagar.meSenior Software Engineer
2021 – 2024
Engineered core features at Brazil's Stripe equivalent.+

Pagar.me is Brazil's leading developer-focused payments platform — a Stone Co. subsidiary (NASDAQ: STNE) that processed R$367B in TPV in 2022 across 2.5M+ merchants. I was on the receivables anticipation team, the company's most profitable product. Diagnosed and solved a critical bottleneck on the highest-revenue route — long-query alerts at production scale — with a daily payables aggregation backed by an indexed read store. 90% performance improvement. Delivered a tax optimization mechanism saving R$23M per month. Built the fee calculator end-to-end: the public tool merchants use to simulate anticipation fees across every card brand and installment plan.

+ skills
Node.jsTypeScriptPostgreSQLKafkaPythonData ModelingPerformance OptimizationEvent-Driven ArchitectureSystem Design
Sky.OneFull Stack Developer → Technical Lead
2019 – 2021
Grew from developer to Technical Lead across three cloud products.+

In 2.3 years at Sky.One, I went from entry-level Python developer to Technical Lead — growing across three products and two distinct roles. Each move wasn't planned: it was a product that needed someone to step up. Went from backend microservices maintenance to full-stack development to owning the delivery of a greenfield portal serving 25,000+ enterprise clients.

Full Stack DeveloperAug 2019 – Apr 2021

AutoSkyMaintained and developed features for AutoSky, Sky.One's flagship ERP-to-cloud migration and virtualization platform. First real exposure to microservices architecture, message queues, and containerization at production scale.

IntegraSkyJoined the IntegraSky team — Sky.One's iPaaS platform for enterprise workflow automation — and helped take it from beta to production launch. Expanded from Python-only backend to full-stack on the job, learning React and Node.js as the product demanded.

Technical LeadMay – Nov 2021

Customer PortalPromoted to Technical Lead and handed a greenfield project: a self-service portal for Sky.One's enterprise client base, integrating SAP, Zoho CRM, and multiple internal systems into a single product. Led 4 engineers through the full delivery cycle. Sky.One now serves 25,000+ enterprise clients on that foundation.

+ skills
TypeScriptPythonNestJSReactNode.jsTypeORMDockerAWSRabbitMQMicroservicesSystem IntegrationTechnical Leadership
TivitJunior Software Developer
2018 – 2019
First engineering role — built multi-cloud management at enterprise scale.+

First job in tech. Tivit was one of Brazil's largest IT services firms — 10,000+ employees, with 8 of the 10 largest Brazilian companies as clients. I was on the One.Cloud team: a multi-cloud management portal spanning AWS, GCP, and Azure. Building real enterprise software from day one set the standard for everything that followed.

+ skills
PythonDjangoREST APIsDockerAnsibleAWSGCPAzureCloud Infrastructure