Engineering Leader - eCommerce

Harnham; Mountain View (CA); On-site; USD 280,000 - 300,000; Full time

Job summary

Harnham is seeking a Head of eCommerce Engineering to lead a 20+ person global team, reporting to the executive team. The role focuses on architecture, modernization, and seamless payment integrations at scale across platforms and regions.

You will guide cloud strategies (Azure/AWS), drive AI-enabled solutions, and partner with cross-functional leaders to raise engineering quality and reliability while transforming legacy systems.

Qualifications

• BS in Computer Science or related field required; MS preferred.
• 12+ years of experience in large-scale eCommerce, payments, platform modernization, and AI-assisted system design.
• Strong Java backend, system architecture, and cloud experience (Azure required, AWS a plus).
• Experience with commerce platforms and leading global engineering teams.

Responsibilities

• Lead architecture and technical direction for global eCommerce platforms, modernizing legacy Java systems into AI-enabled solutions.
• Oversee checkout, billing, subscriptions, payments, and third-party payment integrations at global scale.
• Drive cloud and database modernization strategies, including Azure/AWS and OracleDB migration planning.
• Provide hands-on architectural guidance and elevate engineering capabilities across teams.
• Partner with senior engineers, architects, and cross-functional leaders to improve scalability, reliability, and engineering practices.

Skills

Java backend

System architecture

Cloud Azure

Cloud AWS

Payments domain

AI-driven modernization

Leadership

Global engineering teams

Education

BS in Computer Science

MS preferred

Tools

React

OracleDB

Job description

Compensation:

$280,000–$300,000 base + bonus + RSUs

About the Company

Harnham is partnering with a Fortune 500 leader in cybersecurity and digital trust, combining the scale of a global enterprise with the agility of a startup culture. The company protects hundreds of millions of users worldwide, boasts best-in-class retention, and maintains an unwavering commitment to innovation.

Its platform processes over half a million telemetry events per second, and following a major fintech acquisition in 2025, the organization has significantly expanded its footprint in New York City.

The Role

They are looking for a Head of eCommerce Engineering to oversee a growing global engineering team of 20+ professionals. This is a highly visible, reporting directly to the executive team and partnering with the C-suite.

Key responsibilities include:

• Lead architecture and technical direction for global eCommerce platforms, modernizing legacy Java systems into AI-enabled solutions
• Oversee checkout, billing, subscriptions, payments, and third-party payment integrations at global scale
• Drive cloud and database modernization strategies, including Azure/AWS and OracleDB migration planning
• Provide hands-on architectural guidance, influence AI adoption, and elevate engineering capabilities across teams
• Partner with senior engineers, architects, and cross-functional leaders to improve scalability, reliability, and engineering practices while challenging legacy approaches

Ideal Candidate Profile

• 12+ years of experience preferred, with expertise in large-scale eCommerce, payments, platform modernization, and AI-assisted system design
• Background in high-scale consumer platforms and leading legacy-to-modern transformation initiatives
• BS in Computer Science or related field required; MS preferred
• Strong Java backend, system architecture, and cloud experience (Azure required, AWS a plus)
• Experience with commerce platforms, React, code/architecture reviews, and leading global engineering teams
• Proven ability to influence technical direction and challenge legacy approaches with credibility
• Preferred experience in payments, subscription billing, AI-driven modernization, OracleDB migrations, and cybersecurity/fintech domains

BENEFITS

The compensation package contains a base salary, bonus, RSUs and a comprehensive benefits package.

KEY TERMS

Software Engineering | Leadership | eCommerce | Engineering | Fintech | Customer | Customer-Facing | Direct-to-Consumer | B2C | Product | Production | Real Time | Director | Regulation | Payments | Compliance | Regulatory | Startup Environment | Executive | Scale | Scaling | Artificial Intelligence | Java | Billing | Real-Time