
Adryen Oliveira
@adryenoliveira
I build scalable, high-performance Java systems for financial and security platforms.
What I'm looking for
At Accenture, I build secure internal systems using Java and Spring Boot, including anti-fraud decision-engine versioning that increased team efficiency by 80% and dual-confirmation workflows that reduced human error by 80%.
Previously at Fderivs, Cresol, and EISA, I improved real-time financial data processing, reduced portfolio-risk calculations from 20 minutes to 3 minutes, optimized APIs by about 50%, and increased platform speed by about 70%.
Experience
Work history, roles, and key accomplishments
Engineered features to strengthen internal system security and team performance, including a new insertion and versioning feature for machine learning decision engines and a dual-confirmation feature for administrative actions. Implemented a secure authentication system synchronized with Microsoft accounts.
Software Engineer
Fderivs
Mar 2023 - Sep 2025 (2 years 6 months)
Engineered key product enhancements for the core platform, including an automated financial insights tool and a real-time data migration system. Optimized the risk monitoring system, reducing processing times from 20 minutes to 3 minutes.
Software Engineer
Cresol
Jan 2022 - Oct 2022 (9 months)
Optimized core API systems and engineered an audit logging system for internal administration. Resolved critical production issues, reducing mean time to resolution and minimizing system downtime.
Software Engineer
EISA
Feb 2021 - Jan 2022 (11 months)
Developed key features for the core platform and executed performance optimizations that increased system speed by approximately 70%, driving client acquisition.
Intern
EISA
Feb 2020 - Jan 2021 (11 months)
Developed an automated test documentation system that improved team efficiency by reducing time spent documenting new features.
Education
Degrees, certifications, and relevant coursework
FIAP
Postgraduate Certificate, Machine Learning Engineering
2025 -
Pursuing a Postgraduate Certificate in Machine Learning Engineering, expected to complete in 2026.
FATEC – São Paulo State Technological College
Associate of Science, System Analysis and Development
2019 - 2024
Earned an Associate of Science in System Analysis and Development.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Salary expectations
Social media
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