Tech Lead/CTO/Head of Tech

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Join Circler as Founding Tech Lead

Circler is reinventing the way the world shops secondhand. With resale growing 5x faster than new fashion and sustainability top of mind, Circler is addressing the effort and risk gaps that stop 60% of people from buying preloved. Using proprietary data and AI/ML matching, we make shopping secondhand seamless.

As a Founding Full Stack Developer, you will work alongside the CEO and cross-functional team to define and implement the technology vision and strategy. You\’ll own full-stack delivery, combining powerful backend data handling with beautiful customer experiences. This is a hands-on role with a path to Head of Tech and meaningful equity.

Key Responsibilities:

• Drive data-led innovation with AI/ML, including recommendation systems and personalization features
• Collaborate with business leaders, non-tech stakeholders, and investors to align tech direction with company strategy
• Balance hands-on coding with technical leadership and mentoring
• Own customer experience across web, mobile and backend integrations

Who You Are:

• Strong back-end focus with full-stack engineering experience
• Strategic thinker with commercial acumen and startup grit
• Data-obsessed with proven experience in AI/ML or strong interest in applied machine learning
• Confident communicator and collaborator across technical and non-technical teams
• Pragmatic in build vs. buy decisions
• Passionate about sustainability, marketplaces, and doing meaningful work
• AWS and GCP (BigQuery, Looker)
• Data science and ML experience a plus

Bonus if you have:

• Experience with marketplaces, ecommerce, or apparel
• Experience building matching engines or recommendation systems
• CS or Mathematics degree

Why Join Circler:

• Fast-growing, revenue-generating, grant-backed startup
• Google for Startups program & Walpole Brand of Tomorrow
• Mentorship from world-class advisors including former IBM Watson CTO
• Real equity and influence as a founding team member

Please press apply to access the full job description and apply for this role.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Industries

  Technology, Information and Internet

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