Investigate
Reconstruct business rules, trace dependencies and find the source of a problem before proposing a solution.
SYSTEMS ANALYSIS / BUSINESS SOFTWARE
Felipe MacedoUnderstand the problem.
Improve the system.
I work with support, integration and evolution of business software. I also build personal projects to learn, test ideas and deepen my knowledge.
Systems Analyst at SANSUYSYSTEM TOPOLOGYFIG. 00
CONTEXT → PROBLEM → CHANGE
SYSTEMS ANALYSIS. PRACTICAL SOFTWARE.SCROLL TO EXPLORE
01 / HOW I WORK
Understand before changing.
Existing systems have rules, dependencies and people. Before changing something, I try to understand the problem, the impact and what must keep working.
Connect
Translate needs between business and technology. Integrate applications, data and processes with traceable decisions.
Evolve
Improve existing systems through impact analysis, documentation and care for operational continuity.
02 / PERSONAL PROJECTS
Projects for learning and testing ideas.
Experiments and tools built outside work to study problems that interest me. Each project shows what exists today and what is still missing.
01 / 04LOCAL-FIRST AUDIO PROJECTEarly development
OpenSpeechBridge
Your voice. Another language. Under your control.
Desktop conversations cross languages, but voice translation often relies on external services and closed integrations.
AUDIO SIGNAL PATHSCHEMATIC
- 01MIC IN
- 02BUFFER
- 03STT
- 04TRANSLATE
- 05TTS
- 06VIRTUAL MIC
BOUNDED BUFFERREPLACEABLE ENGINESLOCAL-FIRST
CONCEPTUAL DIAGRAM · NOT LIVE TELEMETRY
Approach
Separate the audio runtime from the models. A local-first architecture with bounded buffers and replaceable engines connects a physical microphone, processing and virtual output.
What works today
Audio types, ring buffers, engine protocols and CLI structure implemented. A modular Rust foundation.
Current limits
PipeWire capture and virtual microphone are still being built. STT, translation, TTS and the complete pipeline are future milestones.
02 / 04STATIC ANALYSIS EXPERIMENTMVP / v0.1
Database Radar
Before changing a column, understand the impact.
In legacy software, a database change can affect workflows that nobody fully understands anymore.
DEPENDENCY GRAPHSCHEMATIC
CONCEPTUAL DIAGRAM · NOT LIVE TELEMETRY
Approach
Investigate source without compiling or running it. Connect methods, SQL, tables and columns in an evidence graph with file, line and confidence.
What works today
Offline CLI for JDBC, SQL files, basic JPA and direct calls. Reader, writer and impact queries with JSON export.
Current limits
Dynamic SQL, reflection and unresolved dependencies remain uncertain. Static evidence does not describe every possible execution.
03 / 04DATA IMPORT TOOLINGIn development / 0.6 SNAPSHOT
Rizoma
Importing data takes more than reading columns.
Spreadsheets vary. A silently incorrect mapping can turn a simple import into an operational risk.
SCHEMA MAPPINGSCHEMATIC
CONCEPTUAL DIAGRAM · NOT LIVE TELEMETRY
Approach
Profile data, explain each suggestion and require confirmation when evidence is insufficient. Validate the transformation before integration.
What works today
CSV, XLS and XLSX; profiling, explainable mapping, explicit feedback, known layouts and dry-run with deterministic history.
Current limits
No destination writes. Scores are heuristics, not probabilities. The library has not been published as a release.
04 / 04JAVA RUNTIME EXPERIMENTExperimental / pre-release
Legacy Flight Recorder
What actually happened in this execution?
Coupled Java 8 applications cannot always be modified just to explain a runtime workflow.
EXECUTION TRACESCHEMATIC
CONCEPTUAL DIAGRAM · NOT LIVE TELEMETRY
Approach
A narrowly scoped Java agent records methods and JDBC locally. Later analysis separates observed events, inferences and unknowns.
What works today
Call trees, JDBC events and bounded JSONL. Documented verification on Temurin 8/Linux with an H2 fixture.
Current limits
Not production-qualified. Same-thread correlation; other drivers, servers and platforms need validation.
03 / PROFESSIONAL JOURNEY
Technology in the context of the people using it.
CURRENT
Systems AnalystSANSUY
In an industrial environment, I work across IT and business teams: application support, incident investigation, ERP evolution, integrations, and desktop and web development.
PREVIOUS
Backend developmentFinancial systems / authorizations
Backend work on a financial authorization system related to Mastercard. The experience brought me closer to transaction processing and increased my interest in backend and reliability.
04 / EDUCATION & CREDENTIALS
Education and continuous learning.
HIGHER EDUCATION
Information Technology Management
Universidade Anhembi Morumbi
Computer Science
FMU
ADDITIONAL TRAINING
- Generation Brasil — Full Stack Java · Cohort 69
- AWS re/Start
- Microsoft Azure Fundamentals — training
- Proz Tech — Web Development
- Cyber Threat Management
Additional training that broadens my practical knowledge across development, cloud, data and security.
Verifiable credentials
Verifiable credentials with links to the official source and concise editorial context.
Amazon Web Services Training and Certification
experience
AWS re/Start Graduate
About this credential
Completion of the AWS re/Start program, with scenario-based learning, hands-on labs and foundations for working with AWS cloud environments.
Issued: Jan 24, 2025
Cisco
learning
Cyber Threat Management
About this credential
Training in security governance and policies, vulnerability assessment, risk management, security controls and post-incident response, including evidence handling and analysis.
Issued: Sep 19, 2025
Cisco
learning
Introduction to Cybersecurity
About this credential
Cybersecurity foundations covering privacy and data confidentiality, network vulnerabilities, threat detection and introductory defensive practices.
Issued: Sep 3, 2025
Microsoft
professional certification
Microsoft Certified: Azure Fundamentals
About this credential
Foundational certification in cloud computing and core Microsoft Azure services, including security, networking, storage, data and virtualization concepts.
Issued: May 22, 2023
Cisco
learning
Network Technician Career Path
About this credential
Practical learning path covering networking fundamentals, IPv4/IPv6 addressing, Cisco devices, cabling, wireless, user support, documentation and troubleshooting.
Issued: Oct 4, 2025
Generation.org
learning
IA para Desenvolvimento de Software
About this credential
Practical training in AI-assisted software development, covering code generation, refinement, testing and documentation, integration into real development workflows, and responsible use with validation, security and ethical safeguards.
Issued: Apr 19, 2026
05 / STUDY & INTERESTS
What I am learning more about.
Backend & systems
Backend, APIs, integration and distributed-systems fundamentals. These are areas I continue studying and practicing.
System evolution
Legacy maintenance, observability and cloud applied to practical operational problems.
AI & tools
Using AI to support development, analysis and documentation, with human review and tests.
06 / CONTACT
If it makes sense,\nlet’s talk.
Business software, integrations, development, or any of the personal projects above. Feel free to get in touch.
felipealexandrej@gmail.com