Javier Pontón González

AI Engineer · IT systems integrator, Saudi Arabia (client under NDA)

Air-gapped multi-agent AI platform for public-tender (RFP) response.

• Multi-agent AI system. Architected a two-agent solution for tender response. A financial agent performs structured extraction from vendor quotations in heterogeneous formats (PDF, Word, Excel, email, supplier portals) into a costing model; a technical agent applies RAG and Arabic OCR over RFPs of hundreds of pages, extracts scope of work and bill of quantities, and drafts the technical proposal from a fixed corporate template.
• Human-in-the-loop and traceability. Engineered source-level traceability from every extracted figure back to its document and page, mandatory human review gates, and visual flagging of AI-generated content with no vendor source behind it, as required by tender confidentiality.
• LLM evaluation. Defined the evaluation harness before the build: a golden dataset of historical tenders scored on field-level precision and recall, regression testing on every prompt or model change, and OpenTelemetry traces per agent step for latency, token cost and failure analysis.
• On-premise AI infrastructure. Designed a model-agnostic architecture against OpenAI-compatible APIs, benchmarked Qwen3, DeepSeek, Falcon-H1 Arabic and ALLaM, sized GPU and VRAM for vLLM and Ollama serving, and met Saudi PDPL and NCA requirements in a fully isolated network.

Python · LangChain · LangGraph · vLLM · Ollama · Qwen3 · DeepSeek · RAG · pgvector · Arabic OCR · OpenTelemetry · Docker

AI Engineer · Iberia, S.A.

Flight pricing platform. Technical owner of the fare pricing domain.

• MCP server. Built and deployed an internal Model Context Protocol server exposing pricing platform tooling to LLM clients, enabling governed function calling and agentic queries over fares, providers and configuration instead of ad-hoc scripts.
• RAG service. Delivered retrieval over internal specs and domain documentation with embeddings, hybrid search and cross-encoder reranking, cutting the time engineers spent locating pricing and NDC domain answers, instrumented with OpenTelemetry and Dynatrace like any other production service.
• AI-assisted software engineering. Introduced Claude Code for service scaffolding, Karate and JUnit test generation and large refactors, driven by project-specific SKILL.md and CLAUDE.md conventions I defined and rolled out to the team.
• Fare pricing services. Engineered the services that calculate flight prices by orchestrating calls to external fare-calculation providers, normalising and aggregating heterogeneous responses under IATA NDC for internal channels and distribution partners; optimised latency and cut provider calls with Redis caching on the highest-traffic pricing flows.
• Event-driven integration. Delivered Kafka and PostgreSQL integration on AWS (ECS, SQS, S3) in hexagonal architecture with DDD, owning resilience of the pricing path (timeouts, retries and fallbacks) against third-party provider degradation.

Python · Java · Kotlin · FastAPI · Spring Boot · MCP · Redis · Kafka · PostgreSQL · AWS · Karate · Claude Code

AI Engineer · KPN

Fibre installation tracking platform, ODF International Team.

• Generative AI in the delivery workflow. Introduced LLM-assisted development across the international team (test generation, legacy refactors, PR review) with shared prompt and review conventions, so AI output was always human-verified before merge.
• Retrieval assistant. Built semantic search with embeddings over runbooks and ServiceNow incident history, cutting the time to find the right precedent when triaging field-operations incidents.
• Platform delivery. Delivered a large-scale fibre installation tracking platform running in three European countries under international SLAs, building microservices and field-operations features and owning production incident resolution.
• Data migration. Migrated historical production records from PostgreSQL to DynamoDB with chunk-based storage, offloading the operational database and keeping the hot read path fast as volume grew.

Python · Java · Kotlin · Spring Boot · Kafka · PostgreSQL · AWS (DynamoDB, Lambda) · Embeddings · Semantic search · Vue.js · Docker

Lead Backend Engineer · Mercadona, S.A.

Product analytics platform.

• Ingestion pipeline. Engineered a Spring Batch ingestion pipeline processing millions of product records per day from heterogeneous sources, with restartable jobs and idempotent writes.
• API-first services. Designed API-first REST services (OpenAPI) in hexagonal architecture with DDD; sustained over 85% automated test coverage under real TDD.

Java · Kotlin · Spring Boot · PostgreSQL · Kafka · AWS · GCP · Docker · Flyway

Lead Backend Engineer · Inditex, S.A.

Global logistics, garment-sorting event platform. Technical lead for the Azure to AWS migration.

• High-concurrency platform. Engineered a serverless platform on Azure and AWS processing thousands of garment-sorting events per minute across the logistics network.
• Zero-downtime migration. Led the Azure to AWS migration with zero downtime; built async REST APIs in hexagonal architecture with DDD and introduced Karate integration testing alongside the existing JUnit suite.

Java · Kotlin · Spring Boot · MongoDB · PostgreSQL · Kafka · AWS · Azure · Docker · Liquibase

Backend Engineer · Open Bank, S.A. (Santander Group)

Investment automation platform. Technical lead for the Java to Kotlin migration.

• Serverless batch at scale. Implemented serverless batch pipelines on AWS Lambda processing millions of financial transactions per day on top of the T24 core banking system, inside a 100+ backend engineer organisation.
• Java to Kotlin migration. Led the migration across services and Lambdas; delivered internal tech talks on DDD and hexagonal architecture to around 50 engineers.

Java · Kotlin · Spring Boot · PostgreSQL · AWS (Lambda, S3) · Elasticsearch · Docker · MockK · T24

Backend Engineer · Idealista, S.A.

Digital contract-signing platform.

• Contract-signing platform. Built a digital contract-signing platform for Spain, Portugal and Italy: REST APIs plus Kafka event streams for real-time signing, with event sourcing keeping an auditable, replayable history of every contract.

Java · Kotlin · Spring Boot · PostgreSQL · Elasticsearch · Kafka · Docker · Event sourcing · DDD · TDD

Backend Engineer · Empathy.co

Playboard, e-commerce search configuration platform.

• Search configuration platform. Built the configuration platform enterprise clients (Kroger, Carrefour, Inditex) use to tune their Elasticsearch-backed search engines; executed zero-downtime migrations: Java 8 to 11, GCP to AWS, monolith to API Gateway.

Java · Spring Boot · MongoDB · Elasticsearch · Docker · Kubernetes · GCP · AWS · JUnit

Facturias · Multimodal invoice-processing SaaS

facturias.es

Structured extraction from invoices with a self-hosted vision-language model (Qwen2.5-VL) plus RAG over Spanish tax regulation to classify and validate entries, with confidence scoring, a labelled evaluation set tracking field-level precision and recall across model versions, and human review on low-confidence fields. VeriFactu compliant, multi-tenant FastAPI backend on PostgreSQL 17 with row-level security and pgvector.

Python · FastAPI · SQLAlchemy (async) · PostgreSQL 17 · Row-level security · pgvector · Qwen2.5-VL · Docker

ZORRO · Consumer dating app for the gay and queer community, iOS and Android

somoszorro.com

Shipped solo to Google Play and the App Store in June 2026. Semantic matchmaking with embeddings and pgvector plus cross-encoder reranking, and self-hosted vision-language model moderation of user photos handling GDPR special-category data with no third-party processors. Polyglot production backend in Kotlin/Spring Boot, Elixir and Python.

Kotlin · Spring Boot · Elixir · Python · PostgreSQL · pgvector · Cross-encoder reranking · AWS SES · Hetzner · Docker

Apunta · Multi-tenant SaaS for shooting clubs, from custom PCB to mobile app

apuntapp.com

Multi-tenant SaaS for shooting clubs owned end to end: custom NFC PCB (ESP32-C6, PN532, PoE) and C/ESP-IDF firmware, Spring Boot backend and React Native app. Range access, training sessions, scoring and club administration on one stack.

Kotlin · Spring Boot · React Native · PostgreSQL · C · ESP-IDF · ESP32-C6 · PN532 · Docker

Grabia · Self-hosted meeting intelligence, fully local AI

Local pipeline with WhisperX transcription and pyannote diarisation feeding a LangChain and LangGraph agent that produces structured summaries, decisions and action items, with RAG over the meeting archive. Served from a private node (Ryzen AI MAX+ 395, 128 GB unified memory, ROCm) running Qwen3-30B under Ollama and mistral.rs; no audio or transcript leaves the machine.

Python · LangChain · LangGraph · WhisperX · pyannote · Ollama · mistral.rs · ROCm · Qwen3

icekar · Distributed scraping and search over 100,000+ car listings nightly

icekar.es

Distributed scraping and Elasticsearch search over 100,000+ car listings nightly, with an agentic LLM layer that rewrites scraper extraction rules when target sites change markup.

Python · Elasticsearch · LLM agents · Docker