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Principal Software Development Engineer - Marketplaces Merchant Platform

Mountain View, California, United States

Company Overview

ID.me is the next-generation digital identity wallet that simplifies how individuals securely prove their identity online. Consumers can verify their identity with ID.me once and seamlessly login across websites without having to create a new login and verify their identity again. Over 140 million users experience streamlined login and identity verification with ID.me at 20 federal agencies, 44 state government agencies, and 66 healthcare organizations. More than 600 consumer brands use ID.me to verify communities and user segments to honor service and build more authentic relationships. ID.me’s technology meets the federal standards for consumer authentication set by the Commerce Department and is approved as a NIST 800-63-3 IAL2 / AAL2 credential service provider by the Kantara Initiative. ID.me is committed to “No Identity Left Behind” to enable all people to have a secure digital identity. To learn more, visit https://network.id.me/.

Principal Software Development Engineer - Marketplaces Merchant Platform

Location: Mountain View, CA (5 days/week in office) [relocation if needed]

ID.me is transitioning to a platform-first approach, building scalable APIs and data-driven services that power our eCommerce marketplace, developer ecosystem, and partner integrations. As a Principal Software Development Engineer on the Marketplaces Platform team, you will play a key role in designing and maintaining high-performance private and public APIs that drive revenue, support merchants, and protect users from fraud.

This team will decompose the monolithic ID.me Shop into modular, service-oriented APIs, enabling faster innovation, improved developer experience, and seamless partner integrations. Our goal is to set a new standard for API quality, documentation, and service interfaces, ensuring clear contextual boundaries across teams for independent development and better communication.

This role is ideal for an API-first engineer who thrives on platform thinking—building data products without a UI that empower products and external developers.

Key Responsibilities

  • Architect and build foundational components for a merchant-facing commerce engine, including checkout, order orchestration, recurring billing, and payment processing.
    Design and implement secure and scalable APIs for merchant integration and commerce experiences.
  • Lead service modularization and infrastructure evolution with a focus on platform extensibility and trust-first design.
  • Apply double-entry bookkeeping, idempotent processing, and PCI/SOX compliant service architectures.
  • Guide forward-compatible data modeling and storage abstraction strategies across SQL and distributed databases.
  • Partner with infra and product teams to ensure early MVPs deliver immediate value while aligning with long-term scalability.
  • Evaluate, propose, and implement modern workflows, e.g., Temporal for orchestration and improved observability.
  • Mentor senior engineers, lead design reviews, and raise the bar on developer experience and code quality.

Required Qualifications

  • 12+ years of backend software development experience with deep expertise in payments, ecommerce, or transaction systems.
  • 8+ years of experience in API design, data modeling, and distributed system patterns.
  • Bachelor’s Degree in Computer Science or equivalent

Preferred Qualifications

  • Track record of transforming legacy systems into modern, scalable service-oriented architectures.
  • Proven success building checkout flows, subscriptions, catalogs, and secure transaction services at scale.
  • Expertise in Java, Go, Kafka, Postgres, and cloud-native architectures (AWS or GCP).
  • Experience designing active-active architectures and systems with strong consistency and auditability.
  • Knowledge of regulatory and compliance frameworks: PCI, SOX, OFAC.
  • Demonstrated ability to ship MVPs rapidly while building towards long-term extensibility.
  • Experience with developer-first products and API-first platforms.
  • Background in eCommerce or financial tech with multi-region deployments.
  • Experience contributing to or maintaining core infrastructure or platform teams.

Why Join ID.me?

At ID.me, we are dedicated to safeguarding online identities and believe our collective efforts will drive positive change worldwide. Working together in an office setting cultivates our vibrant culture, enabling professional advancement, mentorship, collaboration, innovation, and authentic connections. This role requires on-site presence 4-5 days per week at our Mountain View, CA or McLean, VA office.

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The annual base salary listed does not include a company bonus, incentive for sales roles, equity and benefits which will be determined based on experience, skills, education, relevant training, geographic location and role. 

ID.me offers comprehensive medical, dental, vision, health savings account, flexible spending accounts (medical, limited purpose, dependent care, commuter benefit accounts), basic and voluntary life and AD&D insurance, 401(k) with company match, parental leave, ability to participate in unlimited paid time off subject to the terms and conditions of the PTO policy, including 8 company wide holidays, short and long-term disability insurance, accident and critical illness insurance, referral bonus policy, employee assistance program, pet insurance, travel assistant program, wellbeing and childcare discounts, benefit advocates, and a learning and development benefit.

The above represents the anticipated total rewards package for this job requisition. Final offers may vary from the amount listed based on qualifications, professional experiences, skills, education, relevant training, geographic location, and other job related factors.

Mountain View, CA Pay Range

$248,750 - $295,926 USD

ID.me maintains a work environment free from discrimination, where employees are treated with dignity and respect. All ID.me employees share in the responsibility for fulfilling our commitment to equal employment opportunity. ID.me does not discriminate against any employee or applicant on the basis of age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances. ID.me adheres to these principles in all aspects of employment, including recruitment, hiring, training, compensation, promotion, benefits, social and recreational programs, and discipline. In addition, ID.me's policy is to provide reasonable accommodation to qualified employees who have protected disabilities to the extent required by applicable laws, regulations and ordinances where a particular employee works. Upon request we will provide you with more information about such accommodations.

Please review our Privacy Policy, including our CCPA policy, at id.me/privacy. If you provide ID.me with any personally identifiable information you confirm that you have read and agree to be bound by the terms and conditions set out in our Privacy Policy.

ID.me participates in E-Verify.

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