Helio Tejedor

Programmer and good design lover. I ❤️ SwiftUI

My Image

Bio

I am a passionate and skilled professional born in Barcelona with a Master’s Degree in Computer Security and Intelligent Systems. My journey into the world of technology began with a profound fascination for video games, leading me to excel in video game design, C++ programming, apassionate of great design, and understanding low-level architectures.

I am excited to announce that I have joined Katoid as a Senior C++ Developer! I will be sharing more about this position and my journey soon!


In my previous role as a Senior Developer at Northwestern University, I developed applications and software to aid research in bioinformatics, medicine and complex systems, mainly for macOS and iOS platforms.

During this time, I have developed five apps that are now available on the app store: Rainflow, Find My Understudied Genes, Earthtunes, TobbStop, and FlyEye Silhouette, which ranks in the top 150 apps in Education.

I am proficient in Swift, Cocoa, SwiftUI and frameworks like Accelerate, enabling me to develop efficient algorithms and user-friendly applications.

Full CV   Linkedin   GitHub

 

Some projects

Rainflow for macOS

Typical flow cytometry experiments can simultaneously measure the expression of 25-40 proteins in millions of single cells. However, the lack of reproducible analysis techniques hinders deriving actionable insights from this data.

Rainflow is an interactive application that automates flow cytometry data analysis for increased reproducibility. It leverages a commercially available reagent -rainbow beads- to establish ground truth signals. Broad spectrum fluorescence beads are mixed with sample cells to create an internal control for each sample.

Subsequently, bead signal properties, such as drift, stretch, and dispersion, can be used to identify poor-quality samples and align signals from samples collected across several days. This improves the performance of automated cell-type analysis algorithms as observed by merging homogenous cell populations, which were artificially split due to technical artifacts, while simultaneously revealing true biological variation within normal and cancer cells.

Algorithms and models are being incorporated into a Python package and Apple App Store application.

Project website

Mac app store

FlyEye Silhouette for macOS

Silhouette is the founding member of the FlyEye suite; a free collection of software designed to aid researchers in quantifying their analysis of the Drosophila larval eye.

Silhouette turns raw microscopy data into cell-specific measurements that are suitable for quantitative analysis. To generate each measurement, Silhouette automatically identifies all cells within an image then quantifies the properties of each identified cell. In addition to morphological properties such as cell size and position, the intensities of fluorescent reporters are quantified by averaging all of the pixels within each identified cell.

Silhouette also provides a graphical user interface that allows users to efficiently annotate each measurement. For instance, users may label identified nuclei with their apparent cell type. Annotation may also be performed on handheld devices using Silhouette Touch. In either case, assigned labels are appended to the Silhouette file structure in real time, facilitating label-based querying during later stages of analysis.

Project website

Mac app store

Earthtunes

Earthtunes is a mobile application that helps you listen to normally inaudible sounds within the Earth beneath us. These sounds are caused by seismic waves and are so low in frequency that our ears do not hear them. Most of these seismic waves are weak and continuously generated by a range of environmental sources. Some of these seismic waves are strong and caused by earthquakes.

Project website

App store

FMUG: Find My Understudied Genes

Find My Understudied Genes (FMUG) is a data-driven tool to help biomedical researchers identify understudied genes and characterize their tractability for future research.

Users submit a list of human genes (presumably from a high-throughput -omics experiment) and can filter these genes down based on a large list of factors, including:

You can read more about principles guiding the design of FMUG in our reviewed pre-print at eLife. Please cite this pre-print if you use FMUG for your research.

Reese Anthony Keith Richardson, Heliodoro Tejedor Navarro, Luis A. Nunes Amaral, Thomas Stoeger. Meta-Research: understudied genes are lost in a leaky pipeline between genome-wide assays and reporting of results; doi: doi.org/10.7554/eLife.93429.1

Project website

App store

TobbStop

TobbStop is an app to help patients quit smoking. It was developed by a multidisciplinary team of health experts, software engineers, game designers and graphic designers. It is an e-health app that includes the latest gamification and mobile learning technologies.

TobbStop was created to be used in a clinical study in order to test if an app could be an effective aid in the process of quitting smoking. To access the app, you must be part of the clinical trial.

Project website

Supergay

A new hero is born, or rather, is about to be born. Help our brilliant scientist turn into the greater superhero of all modern times: Supergay.

Become Supergay and save the world from the evil plans of your ex-girlfriend and her clone army. Just think, if it’s difficult living with a double identity, what must it be like to have a triple life…?

Lose yourself in incredible, fun mini-games while finding your way through the clone army to stop an imminent nuclear war. Games of stealth, races, confrontations and final battles against bosses, contests against the clock, puzzles and… even a dance at a stag party await you! 32 levels of play are waiting for you in this new, fresh and original adventure.

When you are up against it, eliminate the clone army with special abilities like Gay Power and the Rainbow Ray. Only if you use your powers wisely will you achieve your objectives.

Plunge into an original story in animated comic form, taking you through a truly unparalleled adventure at the rhythm of a soundtrack as good as any film superproduction!

Experience adventure with Supergay & The Attack of His Ex-Girlfriends and, above all, be happy and be yourself!

YouTube Trailer

Note: The game is not in the store anymore, and I cannot publish its code, but the game engine I coded from scratch is here: KYEngine

 

Other publications

Los viajes del alma, Caligrama

Hace más de cinco años decidí comenzar a escribir ficciones sobre la vida y el porqué de todo lo que nos rodea. Fue un proceso divertido que me permitió sacar la creatividad que tenía escondida detrás de los números y los algoritmos.

Al principio, tan solo quería expresar sentimientos y plasmarlos en un papel. Sin saber cómo, los textos se transformaron en una bonita historia donde explico el viaje de un escéptico a la espiritualidad, desde el desconocimiento, y sin perder nunca el vínculo con la ciencia y la realidad.

Este libro no pretende ser un libro de autoayuda ni de esoterismo, tan solo una historia corta donde cada lector me puede acompañar en este viaje y llegar a hacerse las mismas preguntas que me hice hace más de cinco años.

Saber más…

Amazon