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As a Senior Machine Learning Engineer, you will lead model validation for AI systems, challenge model soundness, and build validation tools for high-stakes areas such as credit and fraud prevention.

The Senior Security Engineer will secure cloud infrastructure across various services, develop security policies, manage exceptions, and respond to security alerts while collaborating with teams to eliminate security risks.

Own recruitment, deal execution, and growth of Square's reseller channel globally. Identify, prioritize, and close reseller partnerships (ISOs, ISVs, VARs); build business cases, negotiate contracts, launch partnerships, and drive measurable customer acquisition and revenue. Partner cross-functionally and be accountable for partnership performance.

Lead and develop a remote team of Account Executives in a high-velocity SMB sales motion. Drive predictable revenue through KPIs, hiring, training, coaching, pipeline optimization, forecasting, and cross-functional GTM alignment using data-driven insights.

The Staff Machine Learning Engineer will lead ML initiatives, partnering with multiple teams to enhance customer support through AI-driven solutions, focusing on conversational agents and research in chatbot architectures.

Lead and coach a remote team of Account Executives to hit individual and team quota. Hire, train, forecast, manage pipeline and KPIs, run regular reviews, participate in client meetings, refine sales strategy, and use customer feedback to improve products and processes.

Lead vision-heavy design projects for Square's Point of Sale, creating visual and interaction designs, prototypes, and systems. Collaborate with product, engineering, and hardware partners to integrate AI-driven features and ship polished POS experiences.

Manage the full sales cycle for SMB merchants: convert inbound leads, prospect to build pipeline, forecast in Salesforce, collaborate cross-functionally, provide consultative solutions, and consistently meet or exceed monthly and quarterly revenue targets. Bilingual (French/English) role with high activity volume and short sales cycles.

Responsible for full-cycle B2B sales to mid-market merchants: build and manage pipeline, prospect, demo multi-product Square solutions, negotiate complex contracts, collaborate cross-functionally, maintain accurate Salesforce forecasts, and consistently hit monthly and quarterly revenue targets.

Lead architecture and technical strategy for AI-driven product quality systems using LLMs and agents. Build scalable evaluation frameworks, detect regressions, generate insights, and drive cross-functional adoption while mentoring engineers and defining standards for trustworthy AI.