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guijacobus2's photo
guilherme jacobus
From Brazil
$50/hr or $90,000/yr

Active over a week ago


Member since Apr 2026

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Senior Full-stack Engineer

Full-Stack Engineer
Available for hire
Years of experience
6+ years
Experience level
Senior
Available for
Full-time, Contract, Freelance
Available from
28 Jun 2026
Download Resume / CV

I have been working as a full stack dev for 6 years, have done some mobile development as well where I launched an App in Brazil: https://uppiapp.com.br/

I like working on things that are actually hard, systems with real scale, products where the decisions matter, teams small enough that everyone's work is visible. I'm not looking for a place to coast. I want to build something meaningful and have a real say in how it's done.

Employment History

Full Stack Senior Software Engineer (SEO) at TradeMe Current 2025 - Now
Trade Me is New Zealand's largest online marketplace, serving millions of users daily. I own high-traffic SEO systems with a focus on scalability, AI-powered automation, and measurable organic growth. • Solely designed, built, and shipped an internal LLM-powered automation tool using the Claude API to generate and manage SEO metadata across multiple verticals. Reduced a cross-functional process involving Devs and Product Owners from roughly one week to a self-service workflow completed in minutes, with no engineering involvement required after launch. • Active member of the company AI Guild, contributing to internal AI tooling standards, agent workflows, and knowledge sharing across engineering teams. • Co-authored the skill definition for Coriax, an AI agent that reviews Merge Requests across all company repositories. Wrote the SKILL.md spec defining the agent's review behaviour, scope, and output format, enabling consistent, automated code review at scale. • Led SEO-critical feature development across Angular and .NET services, improving crawlability and organic traffic for high-volume listing pages. • Designed scalable backend APIs supporting millions of daily requests, with observability, fault tolerance, and performance as core requirements. • Optimized Core Web Vita
Full Stack Senior Software Engineer at PATTech Ltd 2024 - 2025
PATtech builds software helping major electricity consumers report zero-emission energy and meet carbon targets. I owned engineering initiatives end to end, from architecture through delivery, across data ingestion, reconciliation, and frontend systems. • Solely architected and built a fan-out/fan-in ingestion system on Azure Functions and Service Bus, reducing CSV processing time from 17 minutes to 2 seconds and cutting compute costs by 75%. • Owned and delivered a reconciliation engine matching tokenized energy consumption with generation data, using Snowflake, PostgreSQL, and Prisma. Handled partial matches, record splitting, and edge cases for renewable certificate transactions. • Rebuilt the entire web portal from scratch using Next.js and Node.js, introducing pagination and expand/collapse strategies that reduced web and database load by up to 90% during heavy data operations. • Designed and deployed Python-based ingestion pipelines for scraping and transforming official data from Australia's energy regulator (NEMWeb), storing outputs in Blob Storage and loading to Snowflake via Azure Functions.
Full Stack Intermediate Software Engineer at Mooven Ltd 2023 - 2024
Mooven provides infrastructure and construction teams with real-time data to reduce traffic disruptions. I owned features from planning through release, leading small teams and driving measurable operational improvements. • Decommissioned a legacy Java-based permission system by migrating it to modular Node.js microservices using tRPC. Owned the full migration lifecycle, retiring all Java infrastructure and saving $1,000/month in platform costs. • Led the full lifecycle of the self-service Virtual Messaging Sign feature: scoped requirements, assigned tasks, coordinated delivery, and built the feature hands-on. Reduced internal support requests by over 40% within weeks of launch.
Full Stack Junior Software Engineer at Powerfinance 2022 - 2023
PowerFinance was a carbon emissions marketplace platform exploring blockchain integrations. I owned blockchain-facing services end to end in a fast-moving, ambiguous product environment. • Owned end-to-end delivery of Ethereum smart contract integrations, building Node.js microservices that ingested on-chain data, exposed REST APIs, and connected to GraphQL frontends. Shipped iteratively in a highly ambiguous early-stage environment. • Worked within an event-driven architecture, building async pipelines for real-time blockchain event processing. • Built a shared React and MUI component library as a reusable NPM package, improving UI consistency and shipping speed across teams.
Frontend Web Developer at Accelerate It Digital NZ 2021 - 2022
Fully remote position building web solutions for a NZ-based digital agency, working across frontend and backend services in an Agile/Scrum environment. • Developed React.js frontends and integrated AWS-based APIs for client-facing web projects, contributing to full delivery cycles from design to deployment. • Built and maintained backend services and REST APIs using Next.js and Node.js. • Worked within Agile/Scrum teams across sprint planning, stand-ups, and retrospectives. • Gained foundational AWS experience supporting deployments and environment management for live web projects.

Education

Bachelor of Science in Computer Science at Southern Institute of Technology 2019 - 2021