Open to opportunities

Guilherme Diniz

@guilhermediniz

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Senior software engineer and engineering team lead specializing in scalable, cloud-native SaaS platforms.

Brazil

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What I'm looking for

I seek hands-on leadership roles at growth-stage SaaS or fintech companies where I can lead engineering teams, drive architecture and cloud migrations, mentor engineers, and deliver measurable product impact.

I am a Senior Software Engineer and Engineering Team Lead with 12+ years building and scaling SaaS platforms in fast-growing, remote-first environments. I balance hands-on technical execution with people leadership to deliver reliable, user-centric solutions.

I have deep experience in distributed systems, RESTful APIs, microservices, and cloud-native architectures, and I've led cloud migrations, performance optimizations, and system redesigns to improve stability and conversion metrics.

In hands-on roles I have driven product outcomes—improving Cards conversion rates from 6% to 10%—and in leadership roles I have defined technical vision, mentored engineers, and scaled teams up to a dozen members while owning architecture and delivery.

I am passionate about mentoring engineers, improving engineering processes, and building maintainable systems that support business growth and strong user engagement.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

NovaCredit

Mar 2025 - Present (1 year)

Lead hands-on development of card-focused financial products at scale and improved Cards project conversion rate from 6% to 10% through product and engineering optimizations.

NodeJS TypeScript RESTful APIs Cloud Native Microservices Performance Optimization PostgreSQL Docker Kubernetes

Tech Lead

Payzen

May 2024 - Feb 2025 (9 months)

Led a cross-functional team of 3 engineers, owned architecture and delivery, and designed migration from a third-party servicing platform to an in-house solution.

Team Leadership System Design Cloud Migration NodeJS TypeScript Microservices Docker Architecture

Senior Software Engineer

Payzen

Jul 2023 - May 2024 (10 months)

Designed and maintained business-critical SaaS systems, implemented Docker containerization, and contributed to cloud migration and microservices adoption.

Docker Cloud Migration Microservices NodeJS TypeScript Kubernetes CI CD PostgreSQL

Senior Software Engineer

Daylight

Jul 2022 - Jun 2023 (11 months)

Developed and launched a cross-platform digital banking application and refactored legacy codebases, delivering features that increased user engagement by 20%.

Flutter React Mobile Development Refactoring User Engagement NodeJS PostgreSQL Firebase

Head of Technology

Nerit

Jan 2017 - Jul 2020 (3 years 6 months)

Led and scaled an engineering organization of 12, managed hiring and performance cycles, and aligned stakeholders to deliver customer-focused technology solutions.

Team Leadership Hiring Performance Management Java Spring Boot Hibernate

Java Developer Intern

Nerit

Jan 2015 - Jan 2017 (2 years)

Developed Java applications using JavaFX, Spring Boot, and Hibernate and contributed to internal tools and debugging processes.

Java Java FX Spring Boot Hibernate Debugging Internal Tools SQL

Ruby Developer Intern

Omnilogic

Sep 2013 - Aug 2014 (11 months)

Built web scrapers and backend features using Ruby on Rails, focusing on data automation and web scraping techniques.

Ruby on Rails Web Scraping Data Automation Backend Development PostgreSQL Git

Education

Degrees, certifications, and relevant coursework

Universidade Federal de Minas Gerais

Bachelor of Science, Computer Science

2013 - 2017

Activities and societies: Undergraduate thesis: Movie recommendations system; coursework in algorithms, databases, and software engineering.

Completed a Bachelor of Science in Computer Science with an undergraduate thesis on a movie recommendation system using graph database parameters to improve recommendations.