Alejandro Santos
Verified Expert in Engineering
Software Developer
Alejandro is a computer scientist and software professional with an MSc in computer science. Over the past 19 years, Alejandro's worked on several projects in a variety of industries—the private sector, scientific endeavors, and research—for a range of companies and institutes, including CERN, where he recently developed software in Java and integrated it into a database system while working Agile. Alejandro enjoys working within distributed teams and values clear communication.
Portfolio
Experience
Availability
Preferred Environment
Git, C++, Java, Python, Linux
The most amazing...
...project I've worked on is a social networking website for people in my home city. This was long before Facebook and Instagram existed.
Work Experience
Software Engineer
- Developed features for one of the largest and most complex Android apps.
- Deployed software features to billions of mobile Android devices.
- Implemented software features using custom in-house frameworks and tools.
- Interacted with multiple teams across multiple time zones.
Software Development Consultant
Bloomberg
- Implemented C++ and Python services for the data pipeline, archiving historical Level 2 market depth data.
- Implemented Bloomberg's terminal functions for the internal market depth query.
- Conducted PR code reviews from team members as part of the team effort.
- Tracked and fixed bugs using Jira as a reporting tool.
- Interacted and contributed code across different teams.
Technology Lead Developer
Kayenta
- Led and managed the team development efforts while following an Agile structure.
- Improved engineering efficiency by introducing advanced CI/CD, build automation, application monitoring, and notification solutions.
- Designed and created new microservices with a REST API for internal usage.
- Designed and created new ETL pipelines to consume customers' data.
- Configured Apache Airflow instances for ETL pipeline data.
- Designed and implemented the Azure Cloud infrastructure and Docker containers from scratch.
- Coordinated the testing effort for unit testing and end-to-end testing.
Senior Software Engineer
Transportation, Logistics and Supply Chain Industry (via Toptal)
- Updated a REST API endpoint to provision new business requirements.
- Created unit tests using JUnit for the new REST API endpoints.
- Tracked work using Jira and interacted with the team using GitHub and Slack.
- Created a parser for a domain-specific language (DSL) using ANTLR4.
Founder
Codigo Delta
- Created the early vision of CodigoDelta.net, a platform for learning programming, data structures, and algorithms.
- Defined the roadmap along with maintaining and prioritizing the backlog.
- Created and implemented the basic architecture of the MVP.
- Wrote the problem statements, testing environment, and test cases.
- Built a Jenkins pipeline in a Docker container that runs unit tests, integration tests, and end-to-end tests, along with creating new containers and deploying new application versions.
- Implemented the automated back-end task solver in Python.
Tech Lead and Researcher in Computer Science
CERN
- Led the system design and development efforts to create a simulation tool for the evolution of a Nobel-prize data-acquisition system.
- Defined the roadmap of the project and maintained and prioritized the backlog.
- Implemented both a type of simulation software in C++11 and small-scale prototypes in C++ and Python to model an extensive data acquisition system.
- Published the scientific work underlying the problem statement.
- Gave presentations about the project both internally and at conferences.
- Implemented data analysis and reporting metrics, using Python, Matplotlib, and NumPy.
- Tracked and fixed bugs, using Jira as a reporting tool.
Tech Lead
CERN
- Built a testing environment for a complex event processing (CEP) expert/streaming system.
- Created the cross-language access bindings (C++ to Java) for the time-series database connection (SWIG).
- Designed and implemented an efficient algorithm to read a large amount of data from the database.
- Defined the software technologies required to solve the problem.
- Published a scientific paper describing the algorithms and testing strategy.
- Tracked and fixed bugs, using Jira as a reporting tool.
- Wrote the documentation of the project and prepared internal reference materials.
- Maintained and prioritized the work backlog for the project.
- Conducted user interviews and usability testing.
- Implemented the web-based version of the project using Python for the back end.
Assistant Professor
Universidad Nacional de La Plata
- Taught courses in Java programming and Python programming.
- Wrote the exams for the Data Structures and Algorithms course.
- Wrote the assignments and learning materials for the Java programming labs.
- Organized the local university's seat of ACM/ICPC, a national programming contest.
- Managed a team of teaching assistants for labs and tests.
Software Engineer
CESPI/UNLP
- Developed and tested an internal web Java app to keep track of job applicants.
- Developed and tested a functionality for a Ministry of Health's project to keep track of the compliance of several health regulations.
- Refactored legacy modules to improve the maintenance and addition of new features for the client's needs.
Security Analyst
CeSPI – UNLP
- Developed an internal app using Flask and SQLAlchemy to automate the tracking of spam sources.
- Conducted user interviews and security-related usability testing.
- Performed security reviews of services running on the external network.
- Carried out penetration testing on a variety of web applications.
- Administered services and performed DevOps duties.
- Conducted research and contributed to the development of honeypot software products and solutions.
- Performed a forensic analysis on infected servers and wrote reports on the findings and recommendations for future operations.
- Implemented firewall hardening and network traffic analyses.
Software Engineer
Mercurial | Google Summer of Code
- Implemented the basic functionality to migrate the Python 2 codebase to Python 3.
- Worked in a collaborative and distributed team on an open-source project.
- Communicated the required changes for the codebase migration in the project's public mailing list.
Founder | CTO
La Plata Nights
- Created the early vision of LaPlataNights.com.ar, a social media platform about the nightlife in La Plata, Argentina.
- Conducted user interviews and usability testing of the platform.
- Defined the roadmap, kickstarted development, and maintained and prioritized the backlog.
- Created and implemented the basic architecture of the MVP.
- Refactored the application multiple times to be able to handle the growing load.
Software Engineer
Disytel
- Developed custom features based on the requirements outlined by the clients.
- Tracked and fixed bugs, documented development tasks in an internal Wiki using Trac.
- Performed several maintenance tasks on the internal network, administered web services and the source code version control server.
- Wrote documentation on the usage of the custom features of the product.
Intern
III-LIDI
- Developed functionality for an application to help with the hospital administration.
- Implemented modules to produce customized reports.
- Conducted research and contributed to the development of distributed systems and databases.
- Taught Pascal programming to students in a course called Introduction to Programming.
Software Engineer
Argentum Online
- Developed and designed a secure trading system between players.
- Built the game statistics and information collection system.
- Wrote the sockets and networking subsystem on the server.
Experience
CodigoDelta.net
https://codigodelta.net/The Despacito Programming Language
https://github.com/Despacito-Lang/DespacitoDakara Online MMORPG
https://github.com/DakaraOnline/dakara-server/The Dakara Online game server in a source-to-source translated version of the game server, from VB6 to C++. The Dakara game server was hosted on AWS between 2014 and 2016.
Skills
Languages
Python, Java, C++11, C++, SQL, Python 3, C++14, C++17, C, JavaScript, Embedded C++, Embedded C, TypeScript, Haskell, Scala, PHP, Lua, Python 2, Kotlin
Paradigms
Object-oriented Programming (OOP), Test-driven Development (TDD), Unit Testing, Web Architecture, Agile Software Development, Functional Programming, Microservices, REST, Agile, Testing, Refactoring, API Architecture, RESTful Development, Microservices Architecture, Compiler Design, Object-relational Mapping (ORM), Data Science, ETL, Serverless Architecture, Scrum, Design Patterns, Web Design Patterns, Gang of Four (GOF) Design Patterns
Platforms
Docker, Linux, Ubuntu, Amazon Web Services (AWS), Embedded Linux, Jupyter Notebook, Amazon, JEE, Azure, Kubernetes, AWS Lambda, Google Cloud Platform (GCP), Amazon EC2, Software Design Patterns, Android
Storage
JSON, Relational Databases, MySQL, PostgreSQL, Redis, DB, NoSQL, Azure Table Storage, Data Pipelines, Amazon DynamoDB, Amazon S3 (AWS S3)
Other
Data Structures, Algorithms, Networking, APIs, Back-end Development, Back-end, Architecture, Web Development, Software Architecture, Distributed Systems, Distributed Messaging, Software Engineering, Startups, RESTful Microservices, Code Architecture, MMORPGs, 2D Games, Storage, Embedded Systems, Serverless, Big Data, Big Data Architecture, Data Architecture, Infrastructure Architecture, Full-stack, Distributed Software, Economics, Finance, Data Analysis, Statistics, Object-oriented Databases, Relational Algebra, Machine Learning, RESTful Services, Spring Cloud, Cloud, Cloud Computing, Cloud Security, Cloud Storage, Compilers, Complex Event Processing (CEP), Streaming, HATEOAS, Security, Enterprise Resource Planning (ERP), Research, Data, CI/CD Pipelines, Embedded Software, Containers, Cloud Infrastructure, System Design, CTO, Leadership, IT Project Management, Team Management, Communication, Fintech, Pipelines, Simulations, Large-scale Projects
Frameworks
Spring, Spring Boot, Django, Boost, JNI, Flask, Spring Microservice, OMNeT++, JPA, Hibernate, JSON Web Tokens (JWT), Seam, Selenium
Libraries/APIs
Jenkins Pipeline, OpenCV, REST APIs, Flask-RESTful, Auth, React, Sockets
Tools
Git, Jenkins, ANTLR 4, CMake, Postman, Zuul, GitLab, GitLab CI/CD, Apache Maven, Mercurial, Terraform, Ansible, Apache Airflow, Jira
Industry Expertise
Accounting, Marketing, Project Management
Education
Master’s Degree in Business Administration (MBA)
Quantic School of Business and Technology - Washington, D.C., United States
PhD (Thesis Not Submitted) in Computer Science
Ruprecht Karl University of Heidelberg - Heidelberg (Germany) and Geneva/CERN (Swizerland)
Bachelor’s Degree in Informatics (Five-year Program) in Computer Science
Universidad Nacional de La Plata - La Plata, Argentina
Diploma in Programming Analysis
Universidad Nacional de La Plata - La Plata, Argentina
Certifications
Getting Started with AWS Machine Learning
Coursera
AWS Fundamentals: Going Cloud-Native
Coursera
Microservices with Spring Cloud
Udemy
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