Hire the Best Amazon DynamoDB Developers
in Spain

Need to turn an AI idea into a working demo, pilot, or production path without months of meetings? I am a freelance Senior AI Engineer and Codex Ambassador based in Spain. I help companies build practical OpenAI + AWS systems: AI prototypes, internal copilots, agents, RAG workflows, ChatGPT Business/Codex enablement, evaluation, observability, and AWS serverless/Bedrock architectures. I am most useful when you have a real workflow, messy documents or processes, and a team that needs to understand what is possible, what is worth building, and what should be tested first. What I can help with: - AI prototyping sprints: from idea to functional demo in days - OpenAI API, ChatGPT Business, and Codex adoption for teams - RAG and agent workflows using OpenAI, Amazon Bedrock, OpenSearch, S3, Lambda, Step Functions, DynamoDB, and API Gateway - Internal copilots, Slack/WhatsApp/Google Workspace integrations, and workflow automation - Evaluation, guardrails, observability, cost control, and latency-aware architecture - Training for developers, product teams, founders, managers, and executives Relevant background: - Codex Ambassador; working with LLMs since GPT-2 - Built OpenAI-powered assistants and RAG systems in product/production contexts - Trained 1,200+ AI learners through curso.ai, with a 4.7/5 average rating and around 70% completion - AWS Certified AI Practitioner and Databricks Certified Generative AI Engineer Associate - Kaggle Competitions Expert, with 3 team medals If your goal is a practical OpenAI + AWS prototype or pilot, send me your current workflow, data sources, constraints, and what a successful first demo would look like.

I help companies turn complex, messy data into reliable, production-ready systems for analytics, reporting, and machine learning. I am a Senior Data Engineer and Cloud Engineer with over 8 years of experience building end-to-end data platforms, large-scale ETL pipelines, and cloud-native architectures on AWS and Azure. Most of my clients come to me when their pipelines are slow, expensive, fragile, or difficult to maintain. I design and rebuild data systems so they can run daily without breaking, handle growing volumes, and support real business decisions. I work across the full data lifecycle: ingestion, transformation, modeling, quality checks, and delivery. I build pipelines that pull data from APIs, databases, files, and event streams, transform it with Spark and SQL, and store it in data lakes and warehouses that power dashboards, analytics, and machine learning. I am AWS Certified and have built multiple production platforms using S3, Glue, EMR, Iceberg, Athena, Redshift, Lambda, IAM, and CloudFormation. I also have experience with Azure Data Factory, Databricks, and ADLS, as well as CI/CD tools such as Jenkins and GitHub Actions to keep data pipelines reliable and deployable. A strong part of my expertise is Spark and PySpark optimization. I regularly improve slow or unstable pipelines using techniques such as partitioning strategies, shuffle reduction, broadcast joins, caching, and breaking long DAGs with checkpoints. I have built highly optimized Spark pipelines processing millions of records daily in a stable and cost-efficient way. I have also implemented plug-and-play ETL frameworks that allow multiple teams to ingest and transform data from a shared repository, as well as data quality and ML monitoring using tools like Evidently to track drift and model performance. For business users and data science teams, I have delivered dashboards and reporting systems using Power BI and Amazon QuickSight. In addition to data engineering, I also have experience building web and mobile applications with React, which allows me to design data systems that integrate cleanly with real products and user interfaces. If you need someone who can not only write code but design, optimize, and operate serious data systems in production, I would be happy to help.

I am a Senior Unity Developer with a proven track record of delivering high-quality results in flexible and unpredictable environments. Over the years I have worked with large and small clients and I have delivered multi-million dollar generating software. My most notable projects and achievements are: • Earned record retention numbers by executing a full development cycle of a "Playrix-like" mobile game from the concept phase to the soft-launch phase • Grossed millions of dollars in revenue through the development of an online virtual store that hosted a company-wide loyalty program • Cut down on feature development time by months by developing an in-house SDK that abstracted common tools My years of experience in the industry have provided me with a broad set of skills allowing me to easily adapt to all project requirements and deliver incredible results on time. I estimate the workload accurately, I write clean, maintainable, and testable code, and most importantly, I possess great communication skills which I am able to utilize to deliver you a product you wish cost-effectively and timely.