Igor Castejon Email & Phone Number

I am a backend developer for the international multi-tenant SaaS platform SYDLE ONE. Tech stack: Java, GraalVM, JavaScript (+TypeScript), MongoDB, and Elasticsearch. My core responsibilities include:* Collaborating with cross-functional teams to design and implement new features that enhance the user experience and drive business success.* Developing and executing automated tests (unit, integration, and acceptance) using TDD and BDD to ensure high-quality, bug-free code.* Optimizing and profiling system performance, including latency and memory, to improve efficiency and scalability. In particular, I have worked in optimizations efforts that have reduced at least half of some of our cloud infrastructure, saving thousands of dollars every year.* Creating and running automated load tests using tools such as k6 to identify and address performance bottlenecks.* Utilizing agile methodologies, including Scrum and Kanban, to ensure timely delivery of high-quality software. * Documenting code, processes, and procedures to support ongoing development and maintenance of the platform. Promoted and successfully implemented docs-as-code and Architecture Decision Records (ADRs).* Conducting thorough code reviews to ensure adherence to best practices, maintainability, and code quality standards across the team, fostering a culture of collaboration and continuous improvement.* Advocating for and implementing best practices such as functional programming paradigms, immutability, modular design, consistent coding conventions, and so on to enhance maintainability, readability, and extensibility of the codebase. By leveraging my skills and experience in backend software development, I am able to contribute to the continued growth and success of SYDLE ONE.

As a research member, I was responsible for conducting cutting-edge research, designing and developing routing protocols for underwater wireless networks. My core responsibilities included:* Developing simulations using the ns-3 network simulator (C++), Bash, and Python to test and evaluate the performance of routing protocols.* Designing and developing tools, such as a C++ graph network library, to aid in R&D efforts and facilitate more efficient and effective research.* Conducting scientific and statistical data analysis using Python libraries such as Pandas, NumPy, and Matplotlib.* Contributing to scientific and technical writing efforts, including drafting and publishing academic papers, reports, and presentations.My primary research contribution was the application of n-dimensional Delaunay triangulations and network embeddings to consider link quality in underwater greedy geographic routing. As the lead author, this work was published in the prestigious journal, Computer Networks, in January 2023.* UW-GRE: Underwater Greedy Geographic Routing by Network Embedding - Computer Networks Volume 220, January 2023, 109473 (https://doi.org/10.1016/j.comnet.2022.109473)Under the guidance of my advisor, Luiz Filipe Menezes Vieira (DCC UFMG), I was able to apply my skills in research, design, and development to make significant contributions to the field of underwater wireless network routing protocols.

As a business analyst and software developer, I developed web applications using HTML, CSS, Javascript, MySQL, and Flask (Python). My core responsibilities included:* Collaborating with stakeholders to gather and analyze business requirements to ensure that software solutions meet their needs and deliver tangible value.* Conducting in-depth software requirements gathering to ensure that applications are developed to meet specific business needs.* Designing and developing web applications using a variety of programming languages and technologies, including HTML, CSS, JavaScript, MySQL, and Flask.Through my work as a business analyst and software developer, I was able to contribute to the development of web applications that enabled businesses to operate more efficiently and effectively.