Lead Python Engineer (eCommerce)

KPG99 INC
San Ramon, CA

Job Title Tech Lead/ Staff Engineer


Location San Ramon, CA (5x a week on-site)


Duration 6 month, extension or CTH


Interview Glider Test, Video then on-site


This team owns core backend systems powering a global ecommerce platform with a strategic emphasis on personalization, checkout, and customer experience.

The platform currently supports market‑level personalization and sales tracking, with a clear roadmap toward true user‑level personalization. A key initiative is enabling customer‑level sales visibility, driven by a growing loyalty program and deeper understanding of individual customer behavior.

Strategically, the organization is evolving from a traditional “browse and buy” approach to owning the entire browse experience, allowing for intelligent, personalized journeys across global markets.

As a Tech Lead / Staff Engineer, you will play a critical role in shaping backend architecture, setting engineering standards, and ensuring the scalability, reliability, and quality of systems that directly impact revenue and customer experience worldwide


This is a senior, hands‑on technical leadership role.

You will lead by example through deep coding involvement, architectural ownership, and stewardship of engineering quality across backend systems. The team will rely on you for technical direction, decision‑making, and setting the bar for excellence.


Duties / Day‑to‑Day Responsibilities

  • Serve as a technical leader and owner of backend architecture across ecommerce and personalization systems
  • Design, build, and evolve scalable backend services and APIs
  • Make and drive architectural decisions with a long‑term scalability and reliability mindset
  • Remain deeply hands‑on with production code
  • Own code quality standards and best practices
  • Perform, gate, and guide code reviews across the team
  • Partner closely with Product, Frontend, and Business stakeholders to translate business goals into technical solutions
  • Mentor engineers through technical guidance and design reviews (without formal people management)
  • Lead complex initiatives involving performance optimization, reliability, and system scalability
  • Participate in production deployments, monitoring, and incident resolution
  • Navigate ambiguity and provide technical clarity in fast‑moving environments


Top Requirements (Must‑Haves)

  • Strong backend engineering expertise in Python
  • Proven experience designing and owning backend systems at scale
  • Deep understanding of:
  • System design and architecture
  • Design patterns
  • Scalability, reliability, and performance optimization
  • Passion for building high‑impact ecommerce platforms


  • Experience with DynamoDB (nice to have)
  • Deep ecommerce domain experience, especially on the buy side:
  • Cart
  • Checkout
  • Payments
  • Experience integrating payment providers (e.g., Stripe, PayPal, Apple Pay, Google Pay, Amazon Pay)
  • Familiarity with PCI, security, and compliance considerations
  • Exposure to global commerce and multi‑region systems

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