Abel Casas García

Backend Engineer | Software Architect | AI & Automation Specialist

ES Palma de Mallorca, Spain, 07006

About Me

Software Engineer specialized in backend development, robust architectural design, and the integration of Artificial Intelligence into enterprise systems. With a proven track record in high-availability and business-critical platforms, I focus on building clean, scalable, and decoupled systems through strict application of SOLID principles and Hexagonal Architecture. In parallel, I architect and build solutions leveraging Large Language Models (LLMs) and autonomous AI agents, streamlining the software development lifecycle and elevating operational efficiency via advanced automations.

Work Experience

Backend Engineer

idealista

2025 - Actual

Design, development, and optimization of high-availability distributed backend services and critical integrations. Technical leadership in process automation through Artificial Intelligence and advanced software engineering methodologies.

Designed and implemented robust microservices and event-driven architectures to ensure scalable and decoupled backend ecosystems. Integrated LLMs and autonomous AI agents strategically for code generation, smart debugging, workflow analysis, and automated technical documentation. Championed modern methodologies like SDD (Software/Specification Driven Development) to increase predictability and significantly accelerate Time-to-Market. Optimized overall backend ecosystem performance, including efficient data access layer integration with enterprise Oracle databases. Enforced stability standards through rigorous application of Clean Code, SOLID principles, Hexagonal Architecture, and comprehensive automated testing.
Backend Developer

RIU Hotels & Resorts

2024 - 2025

Evolution and maintenance of the company's core transactional platform, an ecosystem critical to the hotel group's global operations.

Refactored and optimized critical legacy modules within the CORE system to elevate performance and reliability standards. Proactively analyzed internal applications to identify bottlenecks, streamline data flows, and maximize software performance. Resolved high-severity production incidents quickly, ensuring continuous business operations and high systems availability.
Full Stack Developer

INTRICOM RESOURCES SL

2023 - 2024

Conceptualization and development of the internal corporate CORE product focused on workflow automation and rapid project scaffolding.

Architected and developed the transactional core utilizing modern web engineering tech (.NET/C#, NestJS, Docker) ensuring minimal technical debt. Designed a highly generic and modular software structure, radically reducing initialization times for spin-off business projects. Guaranteed infrastructure scalability by efficiently leveraging containerization and scalable data persistence patterns.

Education

Specialization Program in Artificial Intelligence and Big Data

2025 - 2026

IEDIB (Institut d'Ensenyaments A Distància de les Illes Balears)

Large Language Models (LLMs) & Advanced Prompt Engineering Autonomous Intelligent Agents & Cognitive Process Automation Natural Language Processing (NLP) & Machine Learning Pipelines Big Data Architectures & Large Scale Data Ingestion
Bachelor's Degree in Computer Engineering

2024 - Actual

Universitat Oberta de Catalunya

Advanced Data Structures and Algorithms Theory of Computation & Modern Computer Architecture Advanced Database Management Systems
Higher Degree in Web Application Development (DAW)

2022 - 2024

CIFP Francesc de Borja Moll

Software Engineering driven by TDD (Test-Driven Development) and DDD (Domain-Driven Design) Enterprise Ecosystems with Java and Spring Boot RESTful API Design & SQL/NoSQL Database Management (MySQL, Oracle, MongoDB)

Projects

IminApp Enterprise API •

Robust enterprise-grade REST API engineered for intelligent, location-aware event management. Crafted for high fault-tolerance and strict structural separation.

Pure implementation of Hexagonal Architecture and DDD to segregate business workflows entirely from core frameworks. Advanced security protocols leveraging JSON Web Tokens (JWT) and geospatial query optimization on persistence layers. Automated continuous integration/deployment pipeline via GitHub Actions alongside comprehensive Docker environments.
IminApp Core Client •

High-performance web client seamlessly integrated with the IminApp API ecosystem, tailored for real-time spatial data processing and geolocation tracking.

Advanced modular front-end architecture leveraging Angular coupled with reactive state-management patterns. Smooth integration of map components and reverse geocoding APIs optimized heavily for client-side rendering. Scalable client infrastructure prepared for decoupled deployments in production using modern containers.
Dynamic Schema Portfolio •

Blazing fast, modular, internationalized (i18n) portfolio engine powered and compiled strictly via strongly-typed JSON data schemas.

Achieved near-zero load times utilizing Astro's signature Islands Architecture for optimal asset rendering. Embraced Open-Closed architecture, enabling full content updates and localization without touching foundational markup code.

More about me.

- Sustainable Architecture I truly believe high-quality software must be readable, maintainable, and loosely coupled. I write systems with the future developer in mind.
- Product-Led Mindset I don't just write functional code lines; I analyze the direct business impact, grasp operational necessities, and design optimal software solutions.
- AI-First Automation I integrate Artificial Intelligence into core engineering pipelines to eliminate repetitive overhead, maximizing delivery speeds safely.

Languages

Spanish : Native
English : Full Professional Proficiency
Catalan : Full Professional Proficiency

Skills

Java & Spring Boot
.NET / C#
TypeScript / Node.js (NestJS)
Artificial Intelligence (LLMs & AI Agents)
Hexagonal Architecture & Clean Architecture
Domain-Driven Design (DDD)
SOLID Principles / Clean Code
RESTful API Design
Event-Driven Architecture
Databases (Oracle, SQL Server, MySQL, MongoDB)
Docker & Containerization
CI/CD & DevOps (GitLab, GitHub Actions)
Test-Driven Development (TDD)