Senior Software Engineer – Personalization

About the role

Posh is building a platform that connects people through live, in‑real‑life events. As a Senior Software Engineer focused on personalization, you will shape the algorithms and infrastructure that recommend events, match users, and rank content for millions of community members.

Key responsibilities

• Lead the productionalization of personalization, classification, and ranking algorithms.
• Translate experimental outputs from AWS SageMaker and AWS Personalize into production‑ready systems.
• Design, implement, and maintain model‑serving infrastructure, including APIs, batch pipelines, and streaming systems.
• Collaborate on architecture decisions to ensure scalability, performance, and user‑focused improvements.
• Optimize system performance and reliability as the user base grows.
• Drive rapid experimentation with MVPs while maintaining long‑term sustainability.
• Mentor junior engineers and contribute to broader full‑stack projects.

Required profile

• Several years of experience building backend or infrastructure services at scale.
• Proven ability to move machine‑learning models from research to production.
• Strong analytical mindset with a focus on data‑driven decision making.
• Leadership skills and a track record of influencing technical direction.

Required skills

• AWS SageMaker
• AWS Personalize
• API development
• Batch pipeline engineering
• Streaming system design
• Model‑serving infrastructure

What we offer

• In‑person work in a vibrant SoHo office.
• Opportunity to impact a fast‑growing platform with 8M+ users.
• Collaborative, mission‑driven team culture.