Problem first
Select technologies and patterns according to the real constraints—not personal preference.
Senior Software Architect · Technical Expert
Designing and stabilising complex enterprise systems.
I’m Jose Paulo Santiago, a hands-on software architect with more than 15 years of experience delivering, modernising, securing, and operating business-critical platforms.
- 15+ years Software engineering
- Architecture Enterprise and distributed systems
- Łódź, Poland Professional location
architecture-profile.yml
01
Business Requirements
Capabilities · Risks · Constraints
02
Solution Architecture
Security · Resilience · Integration
03
Engineering
Implementation
04
Delivery
Testing and CI/CD
05
Production Operations
Observability · Support · Evolution
01 / About
Architecture grounded in implementation and operations.
I work across architecture, engineering, security, technical leadership, and production support.
I specialise in complex enterprise platforms, particularly systems combining functional and object-oriented programming paradigms, concurrent processing, distributed components, high availability, and demanding operational requirements.
I’m known for rapidly understanding unfamiliar systems, diagnosing critical problems, and working with whatever language, framework, database, or infrastructure is required to deliver a robust solution.
End-to-end ownership
Connect requirements, design, implementation, testing, deployment, and production operations.
Safe evolution
Modernise incrementally while protecting delivery continuity and operational stability.
02 / Expertise
From technical direction to safe production delivery.
A language-agnostic approach combining architectural responsibility with deep implementation and operational experience.
System & Solution Architecture
Technical direction, solution design, enterprise integration, high availability, risk assessment, and platform evolution.
Hands-on Engineering
Functional and object-oriented programming, concurrent systems, performance engineering, automated testing, and CI/CD.
Security & Risk
OWASP-oriented analysis, remediation leadership, secure software delivery, access control, deployment risk, and continuity.
Technical Leadership
Team building, mentoring, incident coordination, stakeholder alignment, implementation guidance, and engineering standards.
03 / Selected impact
Complex problems with measurable outcomes.
Selected examples from enterprise architecture, technical leadership, platform modernisation, and performance engineering.
Technical leadership
Increased enterprise feature-delivery capacity
Built, trained, and mentored an engineering team while establishing stronger technical standards and collaborative delivery practices.
- Delivery
- 1–2 to 5–8 features per release
- Team
- Approximately doubled
- Productivity
- Estimated 2–3× per engineer
Production engineering
Led resolution of critical production incidents
Coordinated investigation and remediation across engineering, architecture, SRE, deployment, and security stakeholders, guiding fixes through implementation, testing, integration, and safe release.
- Scope
- Business-critical platforms
- Focus
- Diagnosis and remediation
- Priority
- Safe operational recovery
Performance engineering
Modernised a massively concurrent system
Helped redevelop the platform using service-oriented architecture, test-driven development, automated performance testing, component testing, and continuous integration.
- Result
- Up to 1000% faster application load
- Architecture
- Service-oriented
- Quality
- Automated testing and CI
04 / Experience
Progressive technical responsibility since 2010.
Architecture, engineering, leadership, security, and production responsibility across IDEMIA organisations in Poland and the Philippines.
January 2022 — Present
System Architect
IDEMIA · Poland
Define architecture and technical direction for enterprise eUICC/SIM platforms. Lead major solution designs, critical production remediation, security analysis, technical risk assessment, migrations, and engineering-team development.
March 2017 — December 2021
Senior Software Engineer
IDEMIA · Poland
Developed and supported enterprise production software, solved complex application and integration problems, improved delivery practices, and mentored developers and QA automation engineers.
2015 — February 2017
Software Architect
IDEMIA · Manila, Philippines
Designed enterprise solutions from requirements through production, led integration and troubleshooting, and mentored engineers in architecture and technical problem solving.
October 2013 — 2015
Junior Software Architect
IDEMIA · Manila, Philippines
Helped redevelop a massively concurrent system and introduced stronger automated testing, performance testing, and continuous integration practices.
November 2010 — October 2013
Software Engineer
IDEMIA · Manila, Philippines
Progressed from junior engineer to technical leadership and solution design responsibilities, including pioneering work on NFC service-management software.
05 / Toolkit
Technologies and practices.
Strongest in adaptable engineering, architecture, and technical problem solving rather than dependence on a single stack.
Engineering
- Scala
- Java
- Functional programming
- Object-oriented programming
- Concurrent systems
Architecture
- Distributed systems
- High availability
- Enterprise integration
- Performance engineering
- Solution architecture
Cloud & Data
- Microsoft Azure
- Cosmos DB
- Cassandra
- MariaDB
- MySQL
Delivery & Security
- CI/CD
- Automated testing
- OWASP
- Secure development
- Git and Agile/Scrum
06 / Contact
Let’s solve the difficult problems.
I’m based in Łódź, Poland. Contact me to discuss enterprise architecture, technical leadership, platform modernisation, or business-critical engineering challenges.
jopasantiago@gmail.com