Franck Trouillez

Working at AppTweak as a Software Engineer, I have stepped up to the role of Fullstack Tech Lead.

As such, I drive our technical vision by shaping robust architectures and establishing best practices across the entire development lifecycle. Building on my experience as a Software Engineer, I now serve as the technical reference for fullstack matters—focusing particularly on Ruby on Rails, which remains at the heart of our architecture, while also leveraging React, Typescript, and modern cloud technologies to create dynamic, scalable solutions.

I lead the design of modular, resilient code architectures, emphasizing composition and reusability, to ensure that our applications not only perform efficiently but are also maintainable over time. In this role, I set and enforce high standards in architecture design, but also through rigorous testing with tools like RSpec. I also aim to improve the developer experience at AppTweak, for example, by using GitHub Actions to streamline development workflows.

I actively share my knowledge by mentoring engineers, driving cross-squad projects, and fostering a collaborative environment where continuous improvement is the norm. This approach ensures that we consistently deliver high-quality products while staying ahead in a fast-paced technological landscape.

I also foster an environment where everyone can learn and evolve, promoting the development of all team members.

As a Product Architect at AppTweak, I lead a squad focused on a specific set of products alongside the Engineering Manager and Product Manager.

In this role, I'm actively involved in product ideation and feature design, collaborating with the Product Manager to ensure our ideas are both innovative and technically feasible. I provide technical expertise to guide the squad, supporting developers in making informed decisions throughout the product development lifecycle.

As a trusted technical advisor, I keep our architecture robust and scalable, while aligning our development teams’ needs with our product management’s strategic goals. I also work closely with Tech Leads and other Product Architects to maintain technical alignment and represent the squad in company-wide technical discussions.

Through clear communication and strategic planning, I help shape our product strategy and drive the development of high-quality, future-proof solutions.

At AppTweak, I contribute as a Software Engineer, actively involved in various aspects of software development. My skills cover a range of technologies and methodologies, with a focus on creating robust and scalable applications. Besides the technical part of the projects, I'm heavily involved in product definition, project management, and product delivery.

An important part of my experience involves using Ruby on Rails and Ruby to build resilient applications. I prioritize a code architecture that emphasizes composition, making use of the flexibility provided by modules in Ruby.

In the area of database management, I have experience designing structures on platforms like MySQL and PostgreSQL. I also work with Online Analytical Processing (OLAP), using platforms such as Amazon Redshift and ClickHouse for efficient data processing and analysis.

Testing is a fundamental aspect of my approach, with a specific focus on RSpec. I optimize test suites, employing strategies such as parallelization and redundancy avoidance to ensure the efficiency and reliability of our testing processes.

I also contribute to frontend development, using React and Typescript to create dynamic and responsive user interfaces. I'm making use of RTK Query in React to enhance the service layer for smooth API interactions.

Simultaneously, I actively participate in Agile methodologies, enforcing and helping others following Scrum methodology, which involves orchestrating sprint planning, retrospectives, and daily stand-ups. This helps us to achieve effective project management.

Working within a small, diverse team of software engineers, frontend developers, and a project manager creates a dynamic work environment. I contribute not only to my role but also to broader projects, like implementing feature flags and parallelizing tests in workflows using GitHub actions. I'm also involved in sharing knowledge and best practices with the team, ensuring that we maintain a high standard of quality in our work.

I've also been involved in designing and implementing end-to-end solutions, such as implementing new data sources and integrating them into our existing data pipeline, using AWS SQS queues workers using AWS EKS.

At AppTweak, my experience embodies a versatile role emphasizing technical proficiency, collaborative teamwork, product definition, and a dedication to best practices, essential for project success.

During my internship at AppTweak, I led a comprehensive project from backend to frontend. Collaborating actively with stakeholders, I collected valuable feedback. I analyzed Apple Search Ads data, devised an algorithm to filter out erroneous data, and smoothly integrated it as a new feature. Beyond the initial scope, I contributed to day-to-day operations, engaging in backend activities like feature development, bug fixing, and code refactoring

At Logiscool, as a Computer Trainer, my role centered on teaching varied student groups aged 7 to 15, from beginners to more advanced learners. Leading weekly sessions for 6 to 12 students, I used a built-in framework similar to Scratch for younger participants and introduced Typescript and Python for the more advanced students. This experience not only deepened my understanding of various programming languages but also provided a valuable opportunity to teach and share knowledge with a young and dynamic audience.

In addition to my main role, I also stepped into the Lead Trainer position, becoming a reference point for fellow trainers. This role went beyond teaching, as I became the go-to person for addressing technical issues.

This experience not only enhanced my teaching skills but also developed my ability to communicate effectively with an audience, keeping them engaged and interested.

At Ecole Polytechnique de Bruxelles, my Master's degree in Computer Engineering provided a comprehensive education in a diverse range of subjects. The curriculum encompassed foundational areas such as microprocessor architecture, assembly and language theory, and compiling. The program also covered crucial aspects of database systems architecture and communication networks, exploring the principles of secure data storage and transmission.

Moving into the realm of security, cryptography theory was a key component, emphasizing the importance of securing digital communications. The coursework then transitioned to optimization techniques, including heuristic optimization, combinatorial optimization, and evolutionary algorithms, essential for solving complex problems efficiently.

The program covered machine learning, artificial intelligence applications, and neural networks, fostering a solid understanding of intelligent systems. Studies in image acquisition and processing were also included, crucial for applications in computer vision.

Beyond technical expertise, the curriculum extended to game theory, providing insights into strategic decision-making, and virtual reality, exploring immersive digital experiences. To round out the educational journey, project management principles and agile methodologies were integrated, ensuring a comprehensive perspective on executing and delivering successful engineering projects.

In addition to the technical aspects, I complemented my education with courses in finance and entrepreneurship, broadening my understanding of the business landscape. A significant part of the academic journey involved a year-long project focused on designing a neural network for detecting faces in pictures. This practical experience contributed to my proficiency in image processing and artificial intelligence.

For my Master's thesis, I dug into the integration of image acquisition and neural networks to identify environmental elements in the context of swarm robotics. This research showcased my ability to bring computer vision into swarm robotics, even with limited resources, highlighting my innovative and interdisciplinary approach to problem-solving in the field of computer engineering.

Graduating Magna cum Laude, I excelled in both the theoretical and practical aspects of computer engineering, ready to contribute to cutting-edge technological advancements.

My bachelor's degree at Ecole Polytechnique de Bruxelles in Engineering was a comprehensive program with a strong emphasis on sciences and mathematics. The initial two years of the engineering curriculum provided me with a diverse skill set, covering subjects such as chemistry, thermodynamics, analysis, algebra, rational mechanics, quantum physics, electricity, electronics, statistics, numerical analysis, signals and systems, fluid mechanics, and oriented-object programming.

Throughout the program, I maintained a high level of motivation and enthusiasm for my coursework. As a passionate learner, I took the initiative to dig deeper into quantum mechanics, showcasing my commitment by independently designing and building a cloud chamber. This hands-on experience, not mandated by the curriculum, allowed me to practically apply theoretical concepts learned in class.

In my last year, I specialized in Computer Engineering, focusing on database architectures, software engineering, algorithms, operational research, digital electronics, and project management using agile methodologies. The curriculum provided a balance of theoretical knowledge and practical application, preparing me for the dynamic field of computer engineering.

Each academic year included a group project, and I actively contributed as a driving force for the team. The projects ranged from designing and programming an autonomous car to creating a robot capable of grabbing and sorting objects. In the third year, we adopted the Extreme Programming methodology for a project involving the development of software capable of compiling LaTex and TikZ into a PDF, offering valuable insights into agile methodologies in practice.

My dedication and academic excellence were recognized as I graduated Summa Cum Laude, placing me at the top of my class. This achievement reflects my commitment to excellence and passion for the field of engineering.

The focus of my master's thesis was on advancing the capabilities of swarm robotics through the integration of a 360-degree vision module for Sphero RVR robot robots. Swarm robotics, an emerging field, aims to achieve complex tasks through the collaboration of simple robots with limited sensors. The thesis tackled the challenge of enhancing information for each robot and, consequently, the entire swarm by proposing a cost-effective vision module.

The designed 360-degree vision module, tailored for a swarm of Sphero RVR robots, included a microprocessor and various cameras. Three distinct methods were explored for robot recognition: color segmentation utilizing LEDs, ArUco markers for localization, and a neural network trained on a dedicated dataset. Experimental evaluations and real-time applications were conducted to assess the performance of these methods.

Results revealed that real-time operations in computer vision demanded substantial resources, with challenges like motion blur affecting the effectiveness of certain methods. Despite limitations, the thesis showcased the potential of the vision module, providing a foundation for future enhancements in the capabilities of Sphero RVR robots within a swarm robotics context.

In summary, the master's thesis introduced a practical 360-degree vision module and outlined methods for robot recognition, enabling robots to identify and locate their peers. Integrating this vision module creates possibilities for extracting additional features in the future, improving information flow within a robot swarm. The thesis highlights the potential of computer vision in advancing swarm robotics, preparing it for more complex tasks and interactions with the environment.

In a Virtual Reality course, our team collaborated on a project using WebGL to craft a 3D RPG game. Emphasizing various virtual reality elements, the game featured immersive aspects like lights, bump mapping, reflection, refraction, particles, animations, explosions, shadows, sound effects, and a user-friendly interface with an ATH.

A notable challenge was avoiding external libraries, showcasing our ability to maximize the inherent capabilities of WebGL. The project captured the essence of creating a virtual reality, offering users a dynamic and interactive experience.

As part of my master's thesis, I developed a specialized package for the Robot Operating System (ROS) to enhance the capabilities of the Sphero RVR robot. This project, a crucial component of my thesis, involved the implementation of a vision module that I meticulously designed, prototyped, and built using a Raspberry Pi. The primary goal of my master's thesis was to smoothly integrate the growing potential of computer vision with swarm robotics.

The ROS package I created serves a pivotal role in enabling the Sphero RVR robot to recognize other robots. This recognition is achieved through various methods, including color segmentation, ArUco markers, and the utilization of a neural network EfficientDet0. By providing these recognition capabilities, the package contributes to advancing the field of swarm robotics, where collaboration and communication among robots are facilitated through innovative computer vision techniques.

In a collaborative project focused on pathfinding optimization, we dug into the complexities of the A* algorithm. Our implementation involved a comprehensive exploration of various heuristics, ranging from Chebyshev distance to the Euclidean metric. To enhance the user experience, we integrated a graphical interface, offering a visual representation of the algorithm's outcomes.

The project's main function visualizes the shortest path in an undirected node graph using the A* algorithm. A noteworthy addition was bidirectionality, enabling the algorithm to start from both ends simultaneously. Though this innovation boosted efficiency through parallelization, it did impact the guaranteed optimality of the solution. Nevertheless, the bidirectional approach demonstrated adaptability in balancing computational speed and solution quality for the A* algorithm.

In an engaging project sparked by my Quantum Physics teacher's proposal, I designed, prototyped, and built a homemade cloud chamber. Using 3D printing, plexiglass, and aluminum, I transformed the initial mini-prototype concept into a larger-scale cloud chamber. It proved capable of visualizing the radioactivity present in the air—an unexpected revelation.

This innovative project allowed me to witness the effects of radioactivity without the need for an external radioactive source. From the initial design to the meticulous construction, the cloud chamber became a tangible manifestation of theoretical concepts discussed in class. This practical experience not only offered valuable insights into the real-world applications of quantum physics but also highlighted the thrill of applying classroom theories to hands-on experiments.

In my second year of engineering, a friend and I started a Java project applying object-oriented programming principles. We created a simulation game inspired by the lively world of manga characters, reflecting my passion for anime.

In our 2D simulation game, we animated manga characters with lively sprites and added immersive sound effects. The gameplay included an experience system for character evolution and transformations, each equipped with multiple attacks. To up the challenge, we introduced enemies, including an intelligent boss. Throughout, we incorporated various anime references in characters and sounds, creating a fun blend of programming and pop culture.

During my academic journey, our team collaborated on a project centered on designing, prototyping, and building a robot with advanced functionalities. This versatile robot was engineered to detect, grasp, sort, and transport tubes based on their size. To achieve these capabilities, we integrated various sensors such as infrared, ultrasonic, and limit switches. The robot's mobility relied on wheel motors, while a carefully 3D-printed gripper, designed using Solidworks, was controlled by servomotors

Our approach to project development included the creation of a simulation environment using Python and the turtle library. This environment served as a testing ground to validate various models before transitioning to the physical implementation phase. The logic governing the robot's actions was integrated using an Arduino, ensuring efficient communication between hardware components. Throughout the project, we followed an agile methodology, organizing our work into sprints to keep a dynamic and iterative development process. Our collective efforts led to the creation of a functional robot dedicated to its designated task, showcasing the collaborative spirit and technical abilities of our team.

In the first year of my bachelor's program, I participated in a collaborative project focusing on the design, prototyping, and construction of an autonomous car. The aim was to create a vehicle capable of autonomously navigating a predefined arena, following roads, and interpreting traffic signs. To achieve this, we integrated various sensors, including a camera and infrared sensors, along with motors for precise wheel control.

The project followed a methodical approach, starting with simulations to validate our model before moving on to the implementation phase. Operating under agile methodology, we organized our workflow into sprints for a structured and iterative development process. The successful integration of hardware and software, alongside the use of microcontrollers, represented the achievement of our goals in creating a functional autonomous car prototype during our first year in the bachelor's program.

Tennis, a passion that started in childhood, holds a significant place in my life. My dad introduced me to the sport, and I began taking lessons at the age of 7. Tournaments became a part of my journey at 9, and since then, tennis has become an integral part of my identity.

It's more than a hobby; it's an integral part of who I am. I used to train extensively, up to four times a week at the peak of my game. The dedication paid off, and by the time I turned 18, I had reached the top 200 players in Belgium. Tennis taught me about determination and the importance of being disciplined in all aspects of life.

When I entered university, I faced a challenging decision and chose to prioritize my studies over tennis. Despite that, I still find time to play twice a week. Now that I've completed my studies, the competitive drive is resurfacing. Tennis is more than just a sport for me; it's a fundamental part of my identity, and I'm eager to re-enter the world of high-level competition.

Video games have been a constant presence in my life, starting with the days of Nintendo64 adventures with my younger brother. Over the years, I've witnessed the evolution of game consoles, from Gameboy Advance to Playstation 3. My gaming journey took a more immersive turn with titles like Call of Duty. Exploring the world of Pokemon has been a delightful part of my gaming journey since my early days.

In high school, PC gaming introduced me to Minecraft and Dofus. During university, I made the full transition, exploring games like Rocket League, Hearthstone, Valorant, and Apex Legends. Rhythm games, like Osu!, hold a special place as one of the many ways I unwind with music I love. In the gaming world, I've also dived into more niche experiences, enjoying titles such as For the King, Slay the Spire, and Inscryption.

However, one game that has truly captured my heart is Danganronpa. Its engaging storytelling and unique gameplay have made it a standout favorite for me in the gaming landscape.

I love traveling and each place I visit leaves its mark on me.

When my girlfriend was interning in Seoul, I got to immerse myself in the vibrant Korean culture. I’ve also wandered through London, enjoying everything from the bustling Piccadilly Circus to the charming Old Town, and even had a laugh at the Tussaud museum.

In Porto, Portugal, the stunning churches, sunny weather, and delicious Pastéis de Nata stole my heart. Over in Spain, I hit the tennis courts and relaxed at a camp in Calpe with my teammates.

Thailand was an adventure too. In Bangkok, the city buzz was electric, and the street food was out of this world. Chiang Mai and Chiang Rai offered a tranquil escape with their lush landscapes and ornate temples, while Krabi’s crystal-clear waters were perfect for unwinding.

France never disappoints—whether it's strolling through Paris, lounging on the beaches of Corsica, or soaking up the sun on the Côte d'Azur. Italy was a blast too; I explored Rome with my Latin class and chilled in Sardinia with friends.

Budapest was a revelation with its lively culture and amazing food. Helsinki mixed business with pleasure perfectly when I went there for Euruko 2022

Then there was Euruko 2023 in Vilnius, Lithuania, which was a deep dive into history and local charm. I’ve also relaxed in Tunisia and Turkey on all-inclusive retreats, and during college, I learned about the Delta Plan and polders on a trip to Zeeland in the Netherlands.

Traveling through Brussels, La Panne, Antwerp, and Bruges always feels like coming home. I’m always looking forward to where I’m headed next.

My anime journey started with Dragon Ball and Dragon Ball Z mangas in my younger years, introducing me to the vast anime universe. High school brought classics like Naruto and Death Note, expanding my appreciation for shonen anime, including My Hero Academia.

Masterpieces like Demon Slayer and Attack on Titan, known for stunning animation and gripping narratives, deepened my passion for anime. Your Lie in April added emotion and beauty to my repertoire, showing impactful stories go beyond action-packed narratives.

Currently following Jujustu Kaisen and Tokyo Revengers, I enjoy exploring diverse genres. However, my heart belongs to the niche gem, Steins;Gate, weaving time travel complexities into a captivating narrative—a personal favorite I recommend to fellow anime enthusiasts.

Embracing the authenticity of anime, I usually prefer original voices with subtitles to enhance storytelling's true essence and preserve cultural nuances.