Open to part-time and freelance backend work (about 20 hours per week): API development, system integrations and enterprise software. I work remotely from Brazil (UTC-3), with 4+ years in C#, Delphi, SQL and REST APIs, and experience leading a technical team.
Open to opportunities
Raul Alves Zamban
@raulalveszamban
Backend Developer & Tech Lead | C#, Delphi, JavaScript, SQL | REST APIs and enterprise integrations | Based in Brazil
BrazilWhat I'm looking for
Backend developer and Tech Lead with 4+ years building and maintaining enterprise software at Questor Sistemas, a Brazilian software company.
I work with C#, Delphi, JavaScript, SQL, REST APIs and JSON, delivering integrations between systems and improving internal processes. I also lead technical work in agile teams (Scrum and Lean), connecting business needs with practical implementation.
Before software, I worked in production, purchasing, warehouse and foreign trade, which gives me a strong understanding of how real business operations work.
I am open to part-time and freelance backend and API projects (about 20 hours per week), working remotely from Brazil (UTC-3).
Experience
Work history, roles, and key accomplishments
Current
Tech Lead
Questor Sistemas
Sep 2026 - Present (1 month)
Lead technical work on enterprise software built with Delphi and C#, designing REST API integrations and improving internal processes. Work with agile teams (Scrum and Lean), connecting business needs with practical implementation.
QS
Software Developer
Questor Sistemas
Oct 2022 - Sep 2026 (3 years 11 months)
Developed and maintained systems using Delphi and C#. Implemented REST APIs for external service integrations and optimized internal processes. Collaborated with multidisciplinary teams on agile-based projects.
II
API Developer and Technical Support Analyst
IXC Soft – Management System for ISPs
Apr 2022 - Oct 2022 (6 months)
Developed REST APIs for system integration and automation. Provided advanced technical support, troubleshooting system and integration issues, and enhanced existing features.
Education
Degrees, certifications, and relevant coursework
FC
Faculdade SENAI Santa Catarina
Bachelor’s, Computer Systems Analysis
2022 - 2024
UC
UCEFF
Executive MBA, People Management
2020 - 2021
Activities and societies: Focus on Organizational Leadership
UC
UCEFF
Bachelor’s, Production Engineering
2015 - 2020
AB
Abracomex
Analyst, International Trade
2018 - 2019
Activities and societies: International Business and Foreign Trade
Tech stack
Software and tools used professionally
Availability
Open to opportunities
Location
BrazilAuthorized to work in
Salary expectations
22k-34k USD
Job categories
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