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  • EndedFeatured
    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
  • EndedFeatured
    TTodd Realty

    Client Portfolio Proposal and HNW Suitability Assessment Exercise

    Overview CC&L Private Capital is an employee-owned discretionary investment manager serving high-net-worth (HNW) individuals, foundations, and not-for-profits across C...

    Wealth Advisor
    $2250prize0d left
    Due 0 entries
  • EndedFeatured
    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
  • EndedFeatured
    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
  • LiveFeatured
    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
  • LiveFeatured
    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
  • LiveFeatured
    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
  • LiveFeatured
    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

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