Builders' Echo
Builders' Echo

Builders' Echo

1-10 employeesToronto, ON4 open contests

About

Builders' Echo is a two-sided, skills-based hiring marketplace where companies run real-world challenges based on the actual work for a role and evaluate candidate submissions through blind judging to reduce bias in hiring. Teams can host scoped contests, verify submissions via GitHub OAuth, and use integrated Stripe payments to handle entry fees and prize payouts, creating a fair, scalable way to identify top performers based on demonstrated work rather than resumes. For builders, it's a chance to be seen on merit alone. Browse open contests, submit your work, and compete for real prizes — while getting discovered by companies hiring for roles you'd actually want. No cover letters, no keyword screens, no interview nerves. Just your output speaking for itself. Whether you're a new grad trying to break in, a self-taught developer without a big-name pedigree, or an experienced engineer tired of jumping through hoops — Builders' Echo levels the playing field. Your GitHub history, your shipped features, and your problem-solving approach matter more than where you went to school or how you perform under pressure in a 45-minute whiteboard session. We're building the hiring process we wish existed: one where the work does the talking, the best submission wins, and both sides walk away with something real.

Open contests

4
Live
Builders' EchoBuilders' Echo

Document Information Extraction Pipeline with LLM Prompting and Evaluation

Overview Scotiabank's Global AI & ML team processes thousands of complex financial documents (loan applications, contracts, financial statements) daily. Building a rel...

Data Scientist, Global AI & ML
$3250prize11d left
Due 0 entries
Live
Builders' EchoBuilders' Echo

Production-Ready Multi-Task Ranking API for E-commerce Search & Recommendations

Overview Instacart's ranking platform must jointly optimize for relevance, conversion, and long-term value rather than any single metric. In this challenge you'll buil...

Senior Machine Learning Engineer, Search & Recommendations
$4000prize12d left
Due 0 entries
Live
Builders' EchoBuilders' Echo

Click-Through Rate Prediction for Programmatic Ad Auctions

Overview StackAdapt's bidder must estimate click-through rates (CTR) in milliseconds to decide whether to bid on an ad impression and at what price. Accurate, well-cal...

Senior/Staff Applied Machine Learning Scientist
$4500prize10d left
Due 0 entries
Live
Builders' EchoBuilders' Echo

Reddit-Style Feed Ranking: Feature Engineering, Multi-Model Comparison, and Dockerized FastAPI Serving Endpoint

Overview You will design and implement a production-oriented ML ranking pipeline for a Reddit-style feed. Using the fixed-seed synthetic dataset generated by the scrip...

Machine Learning Engineer
$3750prize5d left
Due 0 entries

Past contests

3
Ended
Builders' EchoBuilders' Echo

Learning-to-Rank Feed Ranker: Feature Engineering & Gradient Boosted Model on MIND News Dataset

Overview Quora's distribution team connects 300M+ monthly users with content they care about through feed ranking, notifications, and digest emails. A core part of thi...

Senior Machine Learning Engineer, Ranking
$4500prize0d left
Due 1 entry
Ended
Builders' EchoBuilders' Echo

Build a Two-Tower Retrieval Model for Subreddit Recommendations

Overview Reddit's Feed Relevance team needs to surface relevant subreddits to new or low-activity users who haven't established strong preference signals. A two-tower...

Senior Machine Learning Engineer
$3000prize0d left
Due 0 entries
Ended
Builders' EchoBuilders' Echo

Full-stack feature sprint

Deliver a complete vertical slice of a feature (UI + API + persistence) from our brief. Include a README with architecture decisions, setup instructions, and known tra...

Full-stack engineer
$3500prize0d left
Due 1 entry