Wilson Ler
Toronto, Ontario
Technical Co-founder at Beloga,
former Engineering Manager at Constructor
About
Technical Co-founder of Beloga and On-Deck Fellow (ODF23), building a thinking and functioning AI second brain for knowledge-intensive tasks. Experienced in natural language processing (NLP), retrieval-augmented generation (RAG), and full-stack development. Former Engineering Manager at Constructor with a track record of leading successful teams and delivering impactful projects.
Work Experience
Technical Co-founder
Beloga • February 2024 - Present • San Francisco Bay Area
- Launched 2nd Product of the Day on Product Hunt with 6-month MVP.
- Scaled to $3K MRR and 400 MAUs with 3hr daily user engagement.
- Built multi-source RAG platform with personalization.
Technical Consultant
Break Sports • June 2024 - August 2024 • New York (Remote)
- Restructured engineering team and hired 4 engineers.
- Reduced technical debt by 20% through architectural improvements.
Engineering Manager
Constructor • August 2021 - February 2024 • Remote
- Led quiz platform development for e-commerce experiences.
- Reduced onboarding time by 30% with improved hiring processes.
- Achieved 80% error coverage with Sentry auto-assignment system.
Software Engineer
Constructor • August 2019 - August 2021 • Remote
- Early engineer scaling valuation from $50M to $550M.
- Increased API documentation engagement by 50%.
- Reduced indexing time by 50% through redirect optimization.
- Implemented multilingual search for French, Dutch, and English.
Education
Stanford University
Exchange Student • 2019
- Completed CS229 Machine Learning course
- Part of NUS Overseas Colleges Silicon Valley program (Batch 36)
National University of Singapore
Bachelor of Engineering in Computer Engineering • 2017 - 2021
- Honors Graduate
- Minor in NUS Overseas Colleges (Entrepreneurship)
- Focus areas: Information Retrieval, Natural Language Processing (NLP)
Competitions
RobotX Maritime Challenge
1st Place • December 2018 • Hawaii, USA
- International autonomous maritime robotics competition by Robonation
- Led the software team in developing autonomous navigation and perception systems
- Designed and built Autonomous Surface Systems to navigate through complex tasks
- Competed against teams from around the world in real-world maritime scenarios
RoboSub Competition
2nd Place • July 2018 • San Diego, USA
Watch our autonomous submarine pick up golf balls underwater in a small bin using computer vision and precise controls.
- International underwater robotics competition by Robonation
- Developed computer vision and control systems for underwater navigation
- Built an Autonomous Underwater Vehicle (AUV) capable of completing complex tasks
- Successfully navigated through underwater challenges mimicking real research scenarios
Projects
December 2024
- Built an agentic document summarizer powered by Beloga's core technology
- Implemented comprehensive summarization that ensures no important details are missed
- Designed for knowledge workers to quickly digest and understand complex documents
December 2023
- Developed a ChatGPT-based persona through prompt engineering
- Created an engaging conversational AI for fitness and lifestyle advice
- Achieved 50+ DAUs on the platform
May 2023
- Built a Next.js hook to control serverless/SSR route warm-up timing
- Helps developers prevent cold starts by pre-warming routes based on user navigation patterns
- Published as an npm package with 6 stars on GitHub
January 2023
- Built a social media authentication and relationships service using NestJS and MySQL
- Implemented user connections and reputation system with full test coverage
- Achieved 17 stars on GitHub
January 2019
- Built a real-time surveillance system to detect weapons and aggressive behavior using computer vision
- Implemented weapon detection using ML and motion analysis with Optical Flow
- Achieved 18 stars and 10 forks on GitHub, developed during HackAndRoll2019
December 2022
- Built a BLE jammer using NRF240L+ modules and Maple Mini (STM32)
- Achieved 170 stars on GitHub
- Was able to jam up to 100m of BLE communications
- Built an AR mobile app for visualizing light physics experiments
- Implemented realistic light physics simulations and object-tracking
- Developed using Unity and C# to create interactive virtual lab experiences
2019 • Under Prof. Andrew Ng
- Implemented and tested CNN models for visual anomaly detection
- Achieved over 90% accuracy in detecting golf carts using the UCSD Anomaly Detection Dataset
- Developed under Stanford's machine learning course (CS229)
Skills
Technologies
Large Language Models (LLM), Retrieval-Augmented Generation (RAG), React.js, NestJS, JavaScript, Information Retrieval
Soft Skills
Leadership, Hiring, Project Management, Building an Engineering Culture
Testimonials
Staff Engineer at Constructor • March 2024
Where to begin! I have had the pleasure of working with Wilson for years. After so much time it's hard to narrow down a recommendation, but I think it all comes from Wilson's focus on building useful things and delivering value.
One way this manifests is on Wilson's focus on understanding user needs and the overall business / market context in order to prioritize and propose solutions.
Founder and CEO at Constructor • February 2024
Wilson was a talented engineer at Constructor and was consistently a high performer within the organization. I highly valued his contributions. I'm confident he'll be successful in his future roles.