Nov 2022 – Oct 2024 · 1 yr 11 mos · London Area, United Kingdom · Remote

• Zepz is a global fintech company that powers the digital remittance brands WorldRemit and Sendwave, providing fast, secure cross-border money transfers for millions of customers sending money to over 90 countries.
• Senior engineer in the core payments team, building and maintaining money-movement services for 9M+ users across 90+ countries.
• Designed and shipped a Python “Integrations Framework” adopted by 20+ engineers to implement payout/payin partner connectors, reducing time-to-launch new integrations from weeks to days and standardizing error handling, logging, and observability.
• Migrated several high-traffic payout and payin integrations to the new framework using feature flags and gradual traffic shifting, minimizing risk and enabling quick rollbacks when issues were detected.
• Co-designed and implemented a new shared payments service in Kotlin with gRPC, including the integration layer between Zepz and Sendwave and a playbook for safely updating gRPC clients across many services.
• Worked closely with the Pricing team to optimize rate-lookup performance, redesigning schemas and introducing PostgreSQL partitioning and indexing strategies to improve latency and resilience of pricing queries.
• Participated in on-call for payments services and debugged complex production incidents that spanned multiple services and codebases, focusing on deep root-cause analysis and durable fixes.

Sep 2021 – Oct 2024 · 3 yrs 1 mo · Remote

• Sendwave was acquired by Zepz

Jun 2020 – Aug 2021 · 1 yr 2 mos · San Francisco, California, United States · Remote

• Surge AI is a San Francisco–based data labeling and RLHF platform that provides high-quality human feedback and annotation to train and evaluate large language models for top AI labs and enterprises.
• Worked as a senior engineer on a fully remote team building Surge’s data labeling and ML-ops platform in Ruby on Rails.
• Shipped key product features including a quiz-scoring module to evaluate labeler quality and Teams workspaces that improved collaboration and unlocked new pricing and account structures
• Improved performance of heavy reporting and analytics pages through query optimization and caching, significantly reducing load times and making large-scale labeling data usable for customers.
• Cut CI times from ~25 minutes to 6–7 minutes by parallelizing test runs and implementing dependency caching, greatly improving feedback cycles for the whole engineering team.
• Increased automated test coverage on critical user flows, helping the team ship changes faster while maintaining reliability.

Apr 2019 – Apr 2020 · 1 yr

• Lead a team of 8 people that used PHP/Laravel to build a payments gateway system that was the company’s core product.
• Implemented and maintained integrations to several payment processing APIs.
• Advocated for good engineering and design practices and was the technical reference in the team for implementing scalable, efficient and maintainable code.
• Championed and implemented a change in the software development process, removing the need for 2-weekly releases and enabling the team to make multiple deploys per day, reducing time to market and improving developer experience.
• Reduced the time to run the build pipeline from 50 to 6 minutes, reducing development costs and improving developer satisfaction and productivity.
• Acted as a scrum master and conducted daily, planning and retrospective meetings. Tracked team performance metrics like lead-time, throughput and deployment frequency.
• Mentored less experienced developers in 1-1’s, fostered their growth and helped them to overcome technical deficiencies.

Dec 2018 – May 2019 · 5 mos

Jan 2017 – Dec 2018 · 1 yr 11 mos · Belo Horizonte Area, Brazil · Remote

• OkAPI developed Data Enrichment APIs.
• Evolved and maintained a distributed crawler that gathered technographic information from more than 3 million websites.
• Evolved and maintained a Flask based web API that enabled retrieving different kinds of information from websites, such as used technologies, recently installed technologies, email contacts
• Designed and implemented a Rails web application used for user authentication and integration with Hubspot and RD Station CRM platforms.
• Setup and configured a Kong API gateway responsible for providing users API keys, as well as handling throttling and rate-limiting.
• Sold the technology to Intexfy.

Apr 2016 – Jan 2017 · 9 mos · Remote

• Worked on Toptal’s core team maintaining a Ruby on Rails monolith module responsible for freelance registration, profile edition, search, and application for jobs.
• Used the chewy gem to build complex Elastic Search queries to retrieve freelancers based on location, skills, preferred technologies, time working on the platform, the amount earned in the platform, etc.

Jul 2015 – Apr 2016 · 9 mos · Quito, Ecuador · Remote

• Added features and fixed bugs on a Ruby on Rails monolith used to automate google ad campaigns for car sellers.
• Integrated with sellers systems via FTP and maintained code that parsed and ingested text files containing metadata for Google Ad campaigns.
• Planned, coordinated, and drove the company changes from multi-repo to git monorepo. This involved a ton of git tweaking to rewrite the repo histories and make them consistent in a single repo.

Jan 2014 – Jul 2015 · 1 yr 6 mos · Belo Horizonte Area, Brazil

• Rock Content is Brazil's leading company in the Content Marketing business. I'm proud to have been their first development hire and Scrum Master during a time that the company grew from 20 to 120 people.
• First development hire. Worked in close contact with the CTO and other stakeholders, and used Ruby on Rails to design, implement and evolve the company’s SaaS content writing and reviewing platform used by thousands of freelancers and hundreds of internal users.
• Used a state-machine library to implement the content writing and reviewing workflow, sending notifications to relevant parties at each step of the process and helping the company to keep track of the statuses of each content piece.
• Wrote an authentication/authorization module that enabled the login of multiple users per organization.
• Lead a team consisting of 4 developers, was the go-to reference in the team for technical and domain questions, acted as Scrum master and conducted Scrum meetings.

Jul 2010 – Jul 2012 · 2 yrs · Belo Horizonte Area, Brazil · On-site

• Bim.bon is a brazilian startup trying to bring BIM (Building Information Modeling) features to Sketchup.
• First engineering hire. Responsible for designing, implementing and integrating multiple services that supported the company business. Responsible for leading the team that evolved and maintained these services.
• Wrote a set of scrapping scripts that retrieved product information from several construction material websites.
• Wrote a Sketchup plugin that enabled users to download 3D models, annotate them with metadata and generate budget reports.
• Implemented a Sinatra API that serves 3D models and metadata to the plugin via a proprietary binary data format over HTTP/JSONP.
• Designed and implemented a Ruby on Rails application used by architects to upload 3D models and associate product metadata with them.
• Wrote a pure ruby recursive descent JSON parser designed to work with a stripped down version of the Ruby interpreter shipped in the Sketchup application.
• Wrote a DSL used to write Sketchup plugins.
• Led a team of 5 developers, acted as Scrum Master, and tech lead and helped with interviewing and onboarding new developers.
• Mentored and taught Ruby on Rails and Javascript to the developers that weren’t familiar with these technologies.

Jun 2008 – Dec 2009 · 1 yr 6 mos · http://www.sydle.com/br/

• SYDLE is a technology company that provides its customers a digital transformation through SYDLE ONE, its all-in-one corporate platform.
• Worked as a backend developer using languages and technologies like Java, Ruby, Ruby On Rails, Javascript.
• Maintained large amounts of java-based legacy code and developed an in-house bug-tracking system in Ruby On Rails

Jun 2007 – Jun 2008 · 1 yr

• PHP and Java developer. Developed information systems targeted at schools and universities management.
• Technologies used: Php, Java, Mysql, JavaScript, CSS, DHTML

Jan 2007 – Jun 2007 · 5 mos · Belo Horizonte, Minas Gerais, Brazil · On-site

• Installed and provided support for Delphi based ERP control systems.
• Fixed bugs and developed minor features