09/18/2025 updated

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100 % available

Senior Full-Stack Developer with Data Science & Machine Learning Expertise

Eindhoven, Netherlands
Only remote
Electrical Engineering, Computer Science - USP - Universidade de São Paulo (1999)
Eindhoven, Netherlands
Only remote
Electrical Engineering, Computer Science - USP - Universidade de São Paulo (1999)

Profile attachments

Resume-Marcio-Gualtieri.pdf

JavaScriptApache AirflowAmazon Web ServicesBig DataCloud ComputingContinuous IntegrationInformation EngineeringExtract Transform Load (ETL)Data WarehousingDevOpsDistributed SystemsDjangoElasticsearchGitHubScalabilityPostgreSQLMachine LearningMongoDBNoSQLRedisTensorFlowSQL DatabasesTypeScriptData ProcessingData Storage TechnologiesFeature EngineeringData SciencePyTorchFlaskSnowflakeApache SparkBackendFastAPIpandasKubernetesFull Stack DevelopmentApache KafkaFront End Software DevelopmentApi DesignRestful ApiSafety PrinciplesData PipelineDatabase AdministrationJenkinsMicroservices
Full-Stack Development
Extensive experience in full-stack development with expertise in backend technologies including Django, Flask, and various REST API frameworks, complemented by frontend skills in JavaScript, TypeScript, and modern frameworks.

Data Engineering
Advanced data pipeline development using Airflow, designing ETL/ELT processes, and implementing data warehousing solutions with technologies like PostgreSQL, Snowflake, and AWS services.

Machine Learning
Proficiency in developing and deploying machine learning models using PyTorch, TensorFlow, and specialized techniques for NLP, classification, and feature engineering.

DevOps & Cloud Infrastructure
Experience with CI/CD pipelines using GitHub Actions, Jenkins, and managing Kubernetes clusters for containerized applications across various cloud platforms.

Database Management
Expertise across SQL and NoSQL databases including PostgreSQL, Redis, Elasticsearch, MongoDB, and implementing efficient data storage and retrieval strategies.

API Development
Design and implementation of RESTful APIs, FastAPI, and microservices architectures with focus on performance, security, and scalability.

Big Data Processing
Implementation of data processing solutions using technologies like Kafka, Spark, Pandas, and distributed computing frameworks for handling large-scale datasets.
 

Experience

Professional experience10+ years
Freelancer since2019

Languages

EnglishFluent

Project history

Small Business Owner

Karakuri Apps
Operating own small company providing consultancy services in software development, specializing in fullstack development, data engineering, and machine learning for startups and IT companies. Clients include PolySwarm, Marketer, Silvr, and Finmatics.

Senior Data Engineer

ResearchTrial.AI
Designed and maintained scalable ETL pipelines using Airflow to gather, process, and enrich data on AI research papers. Integrated OpenAI and LangChain for LLM-powered workflows and data extraction. Performed feature engineering and trained Machine Learning Models for paper classification.

Full-stack Developer

Finmatics
Developed fullstack features for the SaaS accounting platform, leveraging machine learning (LLMs) to automate accounting tasks. Performed extensive maintenance and defect fixing, addressing numerous issues introduced in previous releases.

Full-stack Developer

Silvr
Developed fullstack features for Silvr's revenuebased financing platform, requiring deep understanding of both the transactional and analytical aspects of the platform. Performed maintenance and defect fixing, addressing numerous issues.

Senior Back-end Developer & Data Engineer

Marketer
Developed the real estate data distribution backend using microservices architecture. Built Airflow DAGs to parse and store real estate data from customer CRM systems. Implemented RabbitMQ consumer services and end-to-end testing for the REST API.

Data Engineer

Kheiron Medical
Designed and implemented data pipelines for normalizing medical data (DICOM files) to support machine learning workflows for breast cancer diagnosis using X-ray images and metadata.

Senior Back-end Developer

Soda
Developed and maintained features for the platform's Python SDK, including support for new data warehouses. Built new features for the Java RESTful backend and handled DevOps tasks including CI/CD pipelines using GitHub Actions.

Senior Back-end Developer & Data Engineer

PolySwarm
Configured and deployed Elasticsearch settings for malware metadata search. Developed similarity detection using TLS/SSDEP hashing and clustering of categorical features. Built REST APIs using Flask, SQLAlchemy, Django, and Celery.

Student

Sabbatical
Took time off to enhance skill set, particularly in data science and machine learning, completing several certified training programs including Coursera/Johns Hopkins' Data Science Specialization and various other courses in data engineering tools.

Senior Back-end Developer

Zalando SE
Developed backend services using Scala and Play Framework. Created migration tools in Python and configured CI/CD pipelines using Jenkins. Contributed to a machine learning classifier developed in Clojure with Sparkling.

Senior Back-end Developer

Dun & Bradstreet
Designed and implemented a test automation framework based on BDD using JBehave, Spring, and Java. Developed backend features using Java and Jersey.

Senior Back-end Developer & Data Engineer

AOL
Developed the eDemo Project (Demographic Data Collection), collecting demographic data from cookies to optimize ad targeting across AOL and partner sites. Implemented data parsing using Avro, integrated with a NoSQL storage system, and utilized a REST interface.

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