Designing secure, scalable and auditable software solutions for mission-critical systems.

Java • Spring Boot • Jakarta EE • Angular • PostgreSQL • Microservices • Cloud Architecture

Software Engineer specialized in enterprise applications, backend architecture and financial systems.

I design and develop systems where security, data integrity, availability and traceability are critical requirements.

My experience includes building and maintaining software solutions for financial and institutional environments, combining:

• Domain-driven design principles
• Secure API architectures
• Microservices ecosystems
• Modern frontend applications
• Integration between legacy and modern platforms

I mainly work with the Java ecosystem, modern web technologies and scalable backend architectures.

• REST APIs
• Microservices Architecture
• Spring Cloud
• Security with JWT / OAuth2
• Event-driven architectures

• Angular standalone components
• Reactive programming with RxJS
• Angular Signals
• Component-driven design
• Enterprise UI architectures

Experience with:

• Relational modeling
• Query optimization
• Transactional systems
• Audit and historical data models

• CI/CD pipelines
• Linux environments
• Cloud-ready deployments
• Application monitoring

• Design of transactional systems
• Double-entry accounting models
• Auditability and traceability
• Data consistency strategies
• Integration with institutional platforms

• Domain-Driven Design (DDD)
• Clean Architecture
• SOLID principles
• Microservices boundaries
• API-first development

• Authentication and authorization models
• JWT-based security
• Secure API design
• Protection of sensitive information
• Audit logging

A scalable URL management platform designed with API-first principles.

Architecture

• Backend: Java + Spring Boot
• Database: PostgreSQL
• Frontend: Angular

Engineering challenges

• Unique code generation
• Concurrency handling
• REST API design
• Scalable data model

Domain model for financial transactions based on accounting principles.

Features

• Double-entry accounting
• Transaction traceability
• Historical records
• Domain separation

Focus

• Data integrity
• Consistency
• Auditability

AI-powered platform for intelligent technology news analysis.

Architecture

• Java + Spring Boot
• Spring AI
• PostgreSQL
• AI Agents

Capabilities

• News classification
• Relevance analysis
• Automated processing workflows

I believe good software is built around:

• Clear domain boundaries
• Explicit architecture decisions
• Security by design
• Maintainability over short-term solutions
• Data integrity as a core requirement

A production system should not only work — it should be understandable, observable and auditable.

GitHub: https://github.com/davidninam

LinkedIn: https://linkedin.com/in/DavidNinaM

Portfolio: https://david.nina.com.bo

• Artificial Intelligence applied to software engineering
• Spring AI and intelligent agents
• Modern Angular architectures
• Cloud-native enterprise systems