Curriculum Vitæ

Personal

I’m from São Paulo, living in Curitiba 🌳, Brazil.
I’ve more than 18 years of professional experience in software development, working remotely async with small teams since 2012.

english level: professional working proficiency (certified as CEFR C2).

hobbies: reading, piano, walking.

not interested: corp bullshit 💩, too many meetings, move to another country.

Tech. Skills

Profissional experience: Golang, PostgreSQL, Redis, AWS, GCP, Kafka, Docker, Git, Prometheus, Codacy, Sentry, Github Actions, Newrelic, Linux.
Familiar: Zig, Rust, Lua, Flutter, Javascript, C, Jenkins, Travis, Terraform, Kubernetes, Blockchain, WebRTC, OpenBSD, FreeBSD, Windows Server, Nanovms.
Interests: Web3, communications protocols and distributed systems.

Work Experience

Jun 2023 - present
Landell Labs
Founder (Golang, Flutter, VUE.js)

After a deserved sabbatical time I decided to start my own company to develop and run some ideas from the last years.
Aug 2018 - Oct 2022:
Cloudwalk
Sr Software Engineer (Golang, PostgreSQL, AWS, GCP)

Was conviced to come back by the CTO and help the company achieve the dream of became a merchant acquirer (from payment processor and later the first licensed crypto firm in Brazil).
- Experienced the exponential growth and saw the company goes from 20 people to 400 in couple years, after receive the largest B series investment in Brazil at time and be valued in $2.15bi after C series.
- Worked as Lead SRE and Lead Cloud Security Engineer positions.
- In charge of all infrastructure compliance of PCI-DSS during three years.
- Planned and implemented hybrid network topology across AWS, GCP and couple datacenters.
- Responsible of development and operation of legacy payment gateway system with more than 100k client devices.
- Finops, hardening of cloud assets, monitoring and troubleshooting on daily basis.
- Support of teams pipelines and devs guidance.
- Elaborated and maintained infrastructure compliance documentation and security awareness training (OWASP/PCI-DSS).
- Burnout 🔥 after years accumulating functions and hiring issues during the pandemic.
Nov 2015 - Jun 2018
Independent Contractor
Software Developer (Golang, C, Elm)
- Development of VoIP platform using FreeSWITCH.
- Technical/Customer Support.
Nov 2013 - Oct 2015
Cloudwalk
Backend Software Engineer (Golang, PostgreSQL, AWS)
- Team lead.
- Help the team on the development of cloud payment gateway.
- Participated of the first PoC using Bitcoin on POS terminal with Coinbase integration.
- Developed experimental CoAP implementation with observe support (draft-ietf-core-observe-12), abbandoned by operational reasons in favor of HTTP.
- Development of time synchronization, notifications and software update systems for POS terminals using SNTP, GOSSIP and Bittorrent protocols respectively.
Oct 2011 - Oct 2013
Software Developer
Freelancer (Golang, Lua, PHP, nginx, MySQL, SQLite, C)
- Development of API for mailing service using OpenResty.
- Sysadmin of LAMP Servers.
- Development of web interface for FreeSWITCH.
- Development of Fax over IP service.
Jul 2010 - Aug 2011
View Informática
Software Developer (Delphi, Oracle)
- Software analyst and developer for bank financial system products like leasing and bail at Volvo, HSBC and Case New Holland banks.
- Help on the mainframe integration using IBM MQ/MI and other webservices like CRIVO for risk analysis.
- Query optimizations on Oracle database.
- Lead development team.
- Implementation of SCM(Subversion) and development good practices.
Jul 2009 - Jul 2010
Prime Software
Software Developer (Java, JBOSS, SQLServer, Oracle)
- Help to develop electronic timecard and access control systems using Java, JBOSS and Oracle/SQLServer databases and the conversion to the cloud.
- Technical support of network infrastructure, VoIP and servers.
- Development of secure VoIP system using FreeSWITCH and ZRTP/SRTP for encrypted calls.
May 2008 - Mar 2009
Volcano
Support Analyst (LAMP, Ruby, VoIP)
- Sysadmin and technical support of network infrastructure, VoIP and Windows/UNIX-like servers.
- Lead support staff.
Sep 2007 - May 2008
View Informática
Software Developer (Delphi, Oracle)
- Software development of modules for financial banking systems at Case New Holland Bank and HSBC Bank.
Apr 2007 - Aug 2007
Link Farma
Webdeveloper (LAMP)
- Web development of ERP and ecommerce systems.
- Technical support of network infrastructure and development environment.
Jan 2006 - Mar 2007
Henry Equipamentos
Software Developer (Delphi/Kylix, VisualBasic, C)
- Worked on electronic timecard and access control software.
- Implementation of proprietary protocols and low-level analysis/testing.
- Development of small SDK around a C library for biometric systems.
- Development support to 3rd-party software integrators.

Projects

feedport (Golang, VUE.js): based on my YARR fork, minimalist feed reader with some other features support.
play.zig (Golang, Zig, JavaScript): playground to run, share and learn Zig code online (used by Zig by Example).

Legacy Projects

goapprtc (Golang): just rewritten in Go the WebRTC p2p reference app.
go-tour-br (Golang): official PT-BR Golang Tour translation.
go-vim (Golang, JavaScript): old Go Playground with vi-mode and highlighting support.
omg8583 (Golang): initial implementation to handle ISO-8583 messaging.

Education

Bach. Elet.Eng., UNINTER (in progress)
Tech. Telecommunications, UTFPR (dropped)