Freelancer profile translated to English.
Back to original languageAbout Aitor
Passionate about technology and building innovative products.
I design and build complex software platforms for companies that need to solve difficult problems.
Many companies have already tried an AI chatbot, RAG, or agent. The real challenge begins afterward: integrating it with existing systems, data, and processes; making it secure, observable, and cost-effective; and bringing it to production without creating another layer of technical debt.
I help companies with critical software to turn complex AI, automation, and modernization initiatives into real, scalable, and operable systems.
I can step in when you need to:
• bring an AI pilot or agents into production;
• integrate LLMs with APIs, backends, data, ERPs, and internal workflows;
• modernize a legacy platform or an architecture that no longer scales;
• design distributed, event-driven, and cloud-native systems;
• introduce security, traceability, human oversight, and governance into automated decisions.
I work as an AI Solutions Architect and Forward Deployed Engineer: I start from the business problem, define the architecture, build the MVP or critical components, integrate the solution, and accompany its deployment. I don't just deliver diagrams.
I have over 20 years of experience in enterprise software architecture and development for transportation, logistics, insurance, digital identity, and B2B platforms.
Technical specialization:
Agentic AI, RAG, tool calling, structured outputs, AI system evaluation and observability; Java, Spring Boot, Rust, TypeScript, React, Vue, PostgreSQL, Kafka, Docker, and Kubernetes; APIs, microservices, security, and digital identity.
I am the founder of Kisku LTD and the architect of Affinity, a trust platform for digital identities and AI agents, and Enikio, a PropTech solution for verifiable rental processes.
Available for remote projects in architecture, integration, modernization, and building products from scratch.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- DECATHLON SE - SPAIN
On Malt
Fullstack and Technical Lead at DecathlonRETAIL (LARGE RETAILERS)September 2025 - June 2026 (9 months)As a **Software Architect and technical lead**, I participated in the design and evolution of Decathlon Spain's digital ecosystem for logistics, customs, and transportation: a distributed platform (REST APIs, frontends, batch jobs, and integrations) supporting critical operations for planning, transportation (CMR), traceability, shipping, dock management, and visits.Problems Addressed
- Standardizing dozens of microservices with disparate behaviors in security, messaging, and observability.
- Reducing time-to-market for new services without multiplying technical debt.
- Scaling an event-driven architecture to handle increasing volumes and heterogeneous integrations (ESB Boomi, legacy systems, external APIs, Google Sheets).
Concrete Contributions and Deliverables
- Design and implementation of the shared platform layer (Spring Boot libraries monorepo): OAuth2/OIDC, Spring Security, multi-cluster Kafka/Redis messaging, distributed caching, JaVers auditing, OpenTelemetry observability, OWASP sanitization, and data export.
- Definition of the contract-first approach: centralized OpenAPI contracts and Avro schemas, with automatic generation.
- Event-driven architecture with Kafka (OAuth SASL_SSL, Avro/Schema Registry), configurable dynamic consumers, real-time WebSocket, and service-to-service trace propagation.
- Design of data pipelines: Spring Batch for mass extraction to PostgreSQL; Apache NiFi flows. CDC to data warehouse.
- Establishment of cross-cutting standards: Spring Boot archetypes, reusable CI/CD workflows, local Docker sandbox (Kafka, NiFi, Debezium, Schema Registry).
- Technical lead for product APIs and frontends: planning, CMR, traceability, activity planning, HDA, and SIGMA applications.
**Results**: Teams bootstrap services in days instead of weeks, a coherent production ecosystem, and a scalable architectural foundation aligned with the logistics business growth. - Kisku LTDFounder and CTOTECHAugust 2025 - Today (1 year)Pafos, CyprusArchitecture of solutions for distributed systems.Design and development of decentralized systems integrated with blockchain.Digital Identity, issuance of Verifiable Credentials, document digitization.
- INDRA MOBILITYArchitecture and development of a railway management systemSOFTWARE PUBLISHINGApril 2020 - June 2026 (6 years and 3 months)Development of railway projects (Eesti Raudtee, Iarnród Éireann)Development of product architectureCommunication with clients and suppliers.Team leadershipBackend and frontend developmentResponsible for different TMS system modules such as the automatic enumerator (ANS) and integrations with other systems (Scada, HABD, Voice Concentrator, GPS, CTC FEC,...)
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Education
- Higher Degree in Computer SciencePontifical University of Salamanca2007