Top Tech Jobs & Startup Jobs in Chicago, IL

As a Senior Marketing Data Scientist, you will conduct quantitative analyses, manage marketing tests, and provide actionable insights to enhance marketing performance and investment effectiveness.

Contract senior technical recruiter responsible for full-cycle hiring: partner with hiring managers, source and screen candidates (using tools like HireEz and LinkedIn), assess technical skills, manage the recruitment process through ATS (Greenhouse preferred), drive diverse pipelines, collaborate with compensation/legal/finance teams, and use data analytics to improve recruitment strategies.

Contract senior technical recruiter responsible for full-cycle hiring: partnering with hiring managers, sourcing and screening candidates via tools like HireEz and LinkedIn, assessing technical skills, managing offers, building diverse pipelines, collaborating with compensation/legal/finance, and using analytics to improve strategies.

Lead full-lifecycle Go-To-Market hiring across EMEA, sourcing senior commercial talent, building diverse pipelines, advising GTM leaders on market intelligence, negotiating complex international offers, and maintaining Greenhouse ATS hygiene and hiring metrics to optimize recruitment processes.

The Staff Data Scientist will own the analytical strategy for Firefox, driving data-informed decisions through measurement frameworks, experiments, and user growth analysis, while mentoring other data scientists.

Lead development and improvement of Firefox's Gecko accessibility engine: write and test C++ code, debug multi-process/multi-threaded and OS-specific issues, collaborate with design and product teams, influence web accessibility standards, build infrastructure exposing the web platform to assistive technologies, and ensure memory and performance targets are met.

Work on Firefox accessibility by improving the Gecko accessibility engine: write and test C++ code, debug multi-process/multi-threaded and OS-specific issues, collaborate with designers and other browser teams, influence web accessibility standards, and build infrastructure to expose the web platform to assistive technologies.

Design, fine-tune, evaluate, and deploy LLM-driven, user-facing browser features using RAG, embeddings, prompt engineering, and modern ML tooling. Lead end-to-end model lifecycle, run production experiments, collaborate with product and engineering, and document and review work with an emphasis on privacy, latency, and usability.

The Staff Data Scientist will lead analytical strategies for Firefox, focusing on product growth, measurement frameworks, and mentoring data scientists while guiding data-driven decisions.

Design, build, and maintain scripts, APIs, and automations for workplace systems and AI/agent integrations. Develop integrations between collaboration tools and identity platforms, implement observability, improve onboarding/offboarding workflows, and collaborate with IT, Security, and People teams to embed secure, scalable automation. Participate in pilots for LLMs/agents and contribute to documentation, code review, and reusable integration libraries.