ESEdmar Siqueira
@edmarsiqueira
Tech lead and senior engineer specializing in backend systems and architectures.
BrazilWhat I'm looking for
I am a dedicated technical leader and senior software engineer with a Bachelor's in Information Systems and a Technical Course in Internet Computing. I have led engineering teams from idea to execution as CTO and Tech Lead, delivering modular monolith and microservice architectures, migrating white-label digital wallets to multi-tenant systems, and implementing high-throughput Instant Payment (PIX) microservices handling billions in annual transactions.
My hands-on background spans Node.js, TypeScript, NestJS, PostgreSQL, DynamoDB and AWS, and I emphasize test coverage, quality, and collaborative planning. I have experience shaping team processes, recruitment, budgeting and architecture (DDD, hexagonal, clean), and I consistently drive timely deliveries while mentoring developer teams and improving platform scalability and reliability.
Experience
Work history, roles, and key accomplishments
Tech Lead / Senior Engineer
MB Labs
Jan 2023 - Present (3 years)
Technical lead for two teams (8 developers each) in a white-label digital wallet ecosystem; updated Node.js stack and led OpenFinance feature migration to a monorepo architecture.
CTO - Founder
Servicefy
Jan 2022 - Present (4 years)
Led technology from idea to execution as CTO, building a 10-person engineering team and a modular service-provider ecosystem (monolith + microservices) achieving 90% test coverage for core services.
Tech Lead / Senior Engineer
Superbid
Jan 2023 - Dec 2023 (11 months)
Led design and implementation of a scalable ad-serving platform using DDD and hexagonal/clean architecture, and contributed to solution architecture and management decisions.
Tech Lead / Junior Developer
MB Labs PayPub
Jan 2021 - Jan 2023 (2 years)
Orchestrated transition of a white-label digital wallet from single-tenant to multi-tenant, and led creation of white-label platform features to expand client offerings.
Mid Level Developer
FastTrade
Contributed to an e-commerce platform focused on object exchanges and led internal developer-skills initiatives, designing backend training tracks and improving evaluation systems.
Junior Developer
Proplace
Developed a web ecosystem for organizing championships and teams and implemented Instant Payments (PIX) microservices for a digital wallet handling billions in annual transactions.
Education
Degrees, certifications, and relevant coursework
UUUniversidade Estadual Paulista (UNESP)
Bachelor of Information Systems, Information Systems
2020 - 2024
Activities and societies: Focused on software management; worked on OpenFinance feature updates and architecture using Node.js and NestJS.
Bachelor's in Information Systems from UNESP, focusing on software management and development within digital wallet and OpenFinance contexts.
ETEC (Technical College)
Technical Course in Internet Computing, Internet Computing
2017 - 2019
Activities and societies: Developed projects including a scratch-built e-commerce platform and learned practical web and backend technologies.
Technical course in Internet Computing emphasizing project development and practical software engineering skills.
Availability
Location
BrazilAuthorized to work in
Job categories
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