Sergio de Sousa
Professional summary
I am a senior backend and systems engineer with over 20 years of experience designing, modernizing, and
stabilizing enterprise systems across banking, telecommunications, and large-scale retail environments.
My work focuses on backend platforms, data-intensive systems, and long-lived infrastructure, particularly in
contexts where correctness, clarity, and operational reliability are critical. I am most effective in complex
environments that require careful evolution rather than constant reinvention.
I am currently available for contract, fixed-scope project, or
full-time engagements (on-site, hybrid, or remote).
Core strengths
- Backend and systems engineering in Unix/Linux environments
- Legacy modernization and incremental platform evolution
- Data processing, migration, and integration workflows
- Database-driven applications and data integrity concerns
- Production support, stabilization, and risk-aware engineering
- Clear documentation and maintainable, predictable systems
Technical background
- Primary languages: Perl, Python, Java
- SQL, relational databases, schema evolution
- Batch processing, ETL-style workflows, system integration
- Long history in regulated or high-reliability environments
Details and examples available on request.
Open-source and professional contributions
I am an open-source contributor and CPAN author, maintaining production-grade Perl modules with tests, CI, and
documentation. This reflects a long-term focus on correctness, maintainability, and disciplined engineering
practices.
Engagement profile
I am well suited for:
- Contract or full-time senior backend roles
- Fixed-scope project work involving modernization, migration, or stabilization
- Embedded roles within existing teams or independent delivery of defined engineering tasks
This page represents my personal professional availability. Managed services and corporate service offerings are handled separately.
Professional context
I am the principal of Serso Engineering, an independent engineering business focused on backend
systems and platform modernization. Serso Engineering operates as a separate corporate entity.