I am a Python/Linux/AWS developer and DevOps/MLOps professional with 25 years of IT experience. The last 13 years have been focused on Python and TypeScript development, with a strong emphasis on backend API development and deployment. I work with Flask, DRF, FastAPI and API Gateway, and have broad experience with SQL databases (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis, Hive), as well as cloud databases like RDS, DynamoDB and BigQuery. I also excel in DevOps/MLOps, IaC, CI/CD, and Linux/Unix server setup. I stay up-to-date with Generative AI models and open-source agentic tools to keep projects modern and efficient.

Juan Luis Martínez

I am a Python/Linux/AWS developer and DevOps/MLOps professional with 25 years of IT experience. The last 13 years have been focused on Python and TypeScript development, with a strong emphasis on backend API development and deployment. I work with Flask, DRF, FastAPI and API Gateway, and have broad experience with SQL databases (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis, Hive), as well as cloud databases like RDS, DynamoDB and BigQuery. I also excel in DevOps/MLOps, IaC, CI/CD, and Linux/Unix server setup. I stay up-to-date with Generative AI models and open-source agentic tools to keep projects modern and efficient.

Available to hire

I am a Python/Linux/AWS developer and DevOps/MLOps professional with 25 years of IT experience. The last 13 years have been focused on Python and TypeScript development, with a strong emphasis on backend API development and deployment.

I work with Flask, DRF, FastAPI and API Gateway, and have broad experience with SQL databases (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis, Hive), as well as cloud databases like RDS, DynamoDB and BigQuery. I also excel in DevOps/MLOps, IaC, CI/CD, and Linux/Unix server setup. I stay up-to-date with Generative AI models and open-source agentic tools to keep projects modern and efficient.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent
Spanish; Castilian
Fluent

Work Experience

Senior Python Backend Developer and DevOps (Freelance) at Volkswagen Digital Hub
August 1, 2025 - September 7, 2025
Responsible for creating a large ETL to replace an old Cobol program, extracting data from Volkswagen/Audi/Skoda manufacturing partners to Volkswagen's central mainframe. Implemented Python-based automation to build filters, reviewed logs in AWS for discrepancy detection, and optimized GitHub Actions tests. Replaced a colleague during parental leave.
Senior Python Backend Developer (Freelance – Part Time) at Adagio consultores, S.L.
December 1, 2024 - September 7, 2025
Developed Python modules to gather casino game data and export to the Spanish Government Game Control Office in XML. Used GCP BigQuery as the main data store and built a FastAPI API on EC2 for client data loading and BigQuery integration; converted selected client data to XML for export.
MLOps Engineer at Zurich Insurance, Ltd.
January 1, 2025 - September 7, 2025
Deployed private models from data scientists using AWS CloudFormation/CDK. Built IaC with Terraform. Managed CI/CD pipelines with AWS CodePipeline or GitLab; developed AWS Python tooling (boto3) and supported data science workloads.
Senior Python Backend Developer (Freelance) at Zurich Insurance, Ltd.
October 1, 2023 - September 7, 2025
Developed a Python-based insurance reserving solution for monthly/quarterly closings on AWS SageMaker. Performed data sanitation with PySpark on EMR, set up a RedHat/RHEL server environment with Nginx and a new Systemd service for the Flask app. Mentored juniors and guided project infrastructure decisions.
Senior Python Backend Developer (Freelance) at EUIPO (European Union Intellectual Property Office)
November 1, 2021 - September 7, 2025
Created demonstration web projects using machine learning libraries with Python FastAPI and established deployment infrastructure. Migrated projects from MySQL to MongoDB and reconfigured Kubernetes deployments; authored Apache Airflow DAGs for daily data ETL; implemented Jenkins/Bitbucket CI/CD to Kubernetes via ArgoCD.
Python Developer (Freelance) at Many clients around the world
July 1, 2021 - September 7, 2025
Developed numerous projects including crypto trading bots, real-time ETL pipelines, and serverless Python apps for AWS Lambda. Built a gender-detection program for Twitter using Bayesian methods, and developed a horse betting system with real-time data processing and Excel-based reporting. Projects leveraged Docker/Kubernetes, with CI/CD to AWS EC2 or VPS.
PHP / Python Developer (Freelance) at Practigo, GmbH
November 1, 2013 - September 7, 2025
Built a full CRM from scratch for a tourism internship company; customized osCommerce; implemented a full-text search tool and integrated invoicing with SQL Server via ODBC; managed office operations from Spain.
Perl Developer at Vodafone
February 1, 2011 - September 7, 2025
Maintained and extended a suite of Perl scripts for logs across Spain and Germany; added PHP-based dashboard graphs; set up and managed a FreeBSD server to host scripts and web graphs.
PHP Developer at Prisacom
August 1, 2008 - September 7, 2025
Renewed and enhanced Santillana's main website and other publications; learned Prisacom's PHP framework quickly and deployed automated content deployment workflows.
General Developer / Systems Administrator at Viuda de Tadeo Juan, S.A.
March 1, 2007 - September 7, 2025
Maintained IT infrastructure across offices, supported Informix-based applications, and created SQL stored procedures for listings and calculations. Implemented mail/proxy services and connected remote offices to the central database.
Senior python backend developer and DevOps (freelance) at Volkswagen Digital Hub
August 1, 2025 - September 7, 2025
Created a large ETL to replace an old Cobol program to extract data from Volkswagen/Audi/Skoda partners into Volkswagen's central mainframe. Implemented filters and Python-based automation for filter creation. Audited AWS logs to identify differences and automated checks. Improved test speed by reviewing GitHub Actions during the parental leave replacement.
Senior Python Developer (Remote) at Adagio consultores, S.L.
December 1, 2024 - September 7, 2025
Developed Python modules to gather casino game data and export to the Spanish Government Game Control Office in XML. Used Google Cloud BigQuery as main data store and built a FastAPI endpoint on EC2 for client data loading. Converted client data to XML for official export.
MLOps / AWS Developer (Remote) at Zurich Insurance, Ltd.
January 1, 2025 - September 7, 2025
Deployed private ML models using AWS CloudFormation/CDK and implemented IaC with Terraform. Built CI/CD pipelines with CodePipeline or GitLab. Worked with boto3 and SageMaker for model endpoints; created pipelines for multimodel endpoints and shadow variants; supported data scientists and repository provisioning.
Senior Python Backend Developer (Freelance) at Zurich Insurance, Ltd.
October 1, 2023 - September 7, 2025
Developed an insurance reserving tool in Python for monthly/quarterly closings on AWS SageMaker Jupyter; data sanitation with PySpark/EMR; set up RHEL 8 server with nginx and a Flask service; mentored juniors; integrated Active Directory and Okta 2FA; improved performance via multiprocessing, reducing compute time from 1 hour to 2 minutes.
Python Developer / Freelance at EUIPO (European Union Intellectual Property Office)
November 1, 2021 - September 7, 2025
Demo web projects with ML libraries via FastAPI; migrated MySQL to MongoDB and deployed on Kubernetes; created Airflow DAGs for EUIPO data; deployed via Jenkins/Bitbucket and ArgoCD.
Python Developer (Freelance) at Many clients around the world
July 1, 2021 - September 7, 2025
Built crypto trading bots and real-time ETL pipelines; developed serverless Python apps in AWS Lambda (including SageMaker integration); created an AI gender classifier for Twitter; developed horse betting software; Docker/Kubernetes deployments; CI/CD using Bitbucket to AWS or VPS.
PHP / Python Developer (Freelance) at Practigo, GmbH
November 1, 2013 - September 7, 2025
Built a full CRM for a German tourism internship; extended osCommerce; implemented full-text search; set up Linux server and connected invoicing via ODBC to SQL Server; managed Bremen office; created data synchronization scripts.
Perl Developer at Vodafone
February 1, 2011 - September 7, 2025
Maintained and extended Vodafone Perl stats scripts from logs; added PHP-based graphs; set up a FreeBSD server for scripts and graphs; provided reporting to marketing.
PHP Developer at Prisacom
August 1, 2008 - September 7, 2025
Renewed major websites for Santillana and El País del Suscriptor; learned Prisacom framework; automated content deployment and decompression.
General Developer / Systems Administrator at Viuda de Tadeo Juan, S.A.
March 1, 2007 - September 7, 2025
Maintained IT infrastructure for main and remote offices; developed Informix applications; created SQL stored procedures; automated data imports with Perl; converted peseta to euro; set up mail/proxy servers and connected remote offices to the main database.
Senior Python Backend Developer and DevOps (Freelance) at Volkswagen Digital Hub
August 1, 2025 - September 7, 2025
Designed and implemented a large ETL to replace a Cobol-based workflow, extracting data from VW/Audi/Skoda manufacturing partners to VW's central mainframe. Created Python programs to automate filter generation, reviewed logs in AWS to identify differences, and optimized filter tests using GitHub Actions. Replaced a developer/DevOps during parental leave.
Senior Python Backend Developer (Freelance – Part Time) at Adagio Consultores, S.L.
December 1, 2024 - September 7, 2025
Developed Python modules to gather casino games data and export to XML for official XML submission. Used Google Cloud BigQuery as the primary data store and built a FastAPI endpoint on EC2 for client data loading and XML conversions.
MLOps at Zurich Insurance, Ltd.
January 1, 2025 - September 7, 2025
Deploy private ML models built by data scientists using AWS CloudFormation/CDK; create IaC with Terraform; run CI/CD pipelines with AWS CodePipeline or GitLab; perform AWS Python development with boto3. Achievements include CodeArtifact setup for a data science department, CDK pipelines for multi-model endpoints, and historical file version comparisons via Python/boto3.
Senior Python Backend Developer (Freelance) at Zurich Insurance, Ltd.
October 1, 2023 - September 7, 2025
Developed a Python-based reserving tool for monthly/quarterly closings on AWS SageMaker. Sanitized large data sets with PySpark/EMR; set up an AWS EC2 RHEL 8 server for multi-tier backend and login services; mentored juniors; integrated 2FA and Active Directory. Reduced runtime significantly via multiprocessing.
Demonstration Web Projects / ML Libraries at EUIPO (European Union Intellectual Property Office)
November 1, 2021 - September 7, 2025
Created demonstration web projects with ML libraries using FastAPI; migrated MySQL data to MongoDB; built Apache Airflow DAGs for EUIPO data pipelines; deployed via Bitbucket/Jenkins to Kubernetes (ArgoCD).
Python Developer (Freelance) at Many Clients Around the World
July 1, 2021 - September 7, 2025
Developed crypto trading bots, real-time ETL pipelines, and serverless applications in AWS Lambda. Prototyped AI initiatives (e.g., URL gender classifier) and maintained a horse betting platform; used Docker/Kubernetes and implemented CI/CD via Bitbucket to AWS.
PHP / Python Developer (Freelance) at Practigo, GmbH
November 1, 2013 - September 7, 2025
Built a full CRM from scratch for a tourism company; extended osCommerce; implemented full-text search; set up Linux server and connected invoicing via ODBC on SQL Server; managed Bremen office operations; automated data synchronization between web and internal systems.
Perl Developer at Vodafone
February 1, 2011 - September 7, 2025
Enhanced a large suite of Perl scripts for telecom analytics; added PHP/Cacti graphs; set up a FreeBSD server to host and run scripts; provided support across Spain and Germany.
PHP Developer at Prisacom
August 1, 2008 - September 7, 2025
Renovated Santillana's main website and El País del Suscriptor; learned Prisacom framework; automated deployment of educational contents; coordinated content and delivery across platforms.
General Developer / Systems Administrator at Viuda de Tadeo Juan, S.A.
March 1, 2007 - September 7, 2025
Maintained IT infrastructure for the head office and remote sites; managed Informix applications on SCO Unix; created SQL stored procedures; developed Perl scripts to import packages from external sources; performed peseta-to-euro conversion and mail/proxy server management.
Python Backend Developer/Data Engineer at Mobilize Financial Services (former Renault Credit International)
November 1, 2025 - Present
Migrate on-prem services to Google Cloud Platform, deploy GCS buckets, Cloud Run Functions, Docker Cloud Run Jobs, Apache Airflow Composer, GitLab pipelines, Serverless VPCs, and GCS triggers; contributed to DBT backend data transformations.
Data Engineer (freelance) at Viewnext
September 1, 2025 - October 1, 2025
Migrate Vodafone Teradata cloud data to Google Cloud BigQuery; create Apache Airflow DAGs for ETLs; adapt SQL queries from Teradata to BigQuery.
MLOps at Zurich Insurance, Ltd.
February 1, 2024 - January 1, 2025
Deploy private models built by data scientists using AWS CloudFormation/CDK; create IaC with Terraform; run CI/CD pipelines with AWS CodePipeline or GitLab; perform AWS Python development with boto3; provide support to data scientists.
Senior python backend developer at Zurich Insurance, Ltd.
December 1, 2021 - October 1, 2023
Develop a Python-based insurance reserving tool for monthly and quarterly closings on AWS SageMaker; sanitize large datasets with PySpark/EMR; set up an RHEL 8 server with nginx and a Systemd service; mentor junior colleagues; integrate Active Directory and 2FA.
Python developer (freelance) at Many clients around the world
November 1, 2013 - July 1, 2021
Develop crypto trading bots, ETL pipelines for real-time data, and a system to analyze groups of stocks; build backend with AWS and API endpoints using Flask; collaborate with frontend teams in React.
PHP / Python developer (freelance) at Practigo, GmbH
February 1, 2011 - November 1, 2013
Build a full CRM from scratch for a tourism company; modify osCommerce; implement CRM with full-text search; set up Linux server and relevant services; synchronize invoices via ODBC to SQL Server; managed Bremen office.
Perl developer at Vodafone
August 1, 2008 - February 1, 2011
Repair and extend a suite of Perl statistics scripts from Vodafone logs; set up FreeBSD server to store and run scripts and web graphs; generate reports for marketing.
PHP developer at Prisacom
March 1, 2007 - August 1, 2008
Renew and enhance Santillana main website; learn Prisacom PHP framework; automate deployment of educational contents; built deployment tooling.
General developer / Systems administrator at Viuda de Tadeo Juan, S.A.
January 1, 2001 - March 1, 2007
Maintain computer infrastructure across offices; develop Informix applications and SQL stored procedures; prepare and deploy mail and proxy services; connect remote offices to main database.

Education

Secondary Education at Padre E. Vitoria College
January 11, 2030 - September 7, 2025
Secondary Education at Padre E. Victoria College
January 11, 2030 - September 7, 2025
Secondary School at Padre E. Vitoria College, Alcoy
January 11, 2030 - April 8, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Financial Services, Software & Internet, Professional Services, Government, Media & Entertainment, Gaming, Computers & Electronics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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