Sr. MTS Software Engineer - Identity at eBay

At e Bay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.

Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work — every day. We're in this together, sustaining the future of our customers, our company, and our planet.

Join a team of passionate thinkers, innovators, and dreamers — and help us connect people and build communities to create economic opportunity for all.

At e Bay, we’re more than a global ecommerce leader — we’re transforming how the world shops and sells. Our platform empowers millions of buyers and sellers across 190+ markets worldwide. We are constantly pushing boundaries to reinvent the future of ecommerce for enthusiasts.

Our culture is built on putting customers first, embracing authenticity, encouraging bold ideas, and enabling everyone to bring their unique selves to work every day. Together, we are shaping the future of our customers, our company, and our planet.

Join a team of passionate thinkers, innovators, and builders working to connect people, foster communities, and create economic opportunity for all.

About the team and the role:

As a Senior MTS Software Engineer in e Bay’s Identity team, you will design, build, and scale critical identity services that power authentication and user trust across the platform.

This includes systems such as:

• Authentication & Authorization

• User Onboarding & Management

• Web Services Security

• Device Fingerprinting

• Account Linking / Entity Resolution

You will work on modern identity protocols like OAuth and OpenID Connect, supporting hundreds of millions of users across web and mobile platforms.

As a senior engineer, you will play a key role across the full product lifecycle — from architecture and design to development, deployment, and continuous improvement — collaborating closely with Product, Design, and Architecture teams.

What you'll do and learn:

• Lead and deliver complex technical initiatives independently across teams and domains

• Define and drive technical strategy, architecture, and long-term roadmap

• Author and influence Architecture Decision Records (ADRs) to guide engineering direction

• Own large functional areas with deep technical expertise

• Design scalable, secure, and high-performance systems with a strong systems mindset

• Drive projects end-to-end from concept to production

• Act as a change agent to elevate engineering standards, culture, and best practices

• Mentor engineers and promote knowledge sharing across teams

• Build flexible and future-proof systems to adapt to evolving platform needs

• Lead support, release processes, and on-call for a 24/7 always-on platform

• Evaluate and adopt emerging technologies to improve performance, scalability, and compliance

What you will bring: Technical Expertise

• Strong backend development experience in Java or Kotlin (required)

• Deep experience building large-scale distributed systems and APIs

• Strong system design expertise including:

• REST / GraphQL APIs (GraphQL preferred)

• Messaging systems

• RDBMS and NoSQL databases

• Containers and infrastructure layers

• Experience implementing identity and federation protocols (OAuth, OpenID Connect)

• Proven ability to drive architecture across multiple domains

Leadership & Impact

• Experience defining and executing technical strategy and roadmap

• Strong ability to influence stakeholders and align on complex architectural decisions

• Track record of improving engineering velocity and code quality across teams

• Experience leading large cross-team initiatives from inception to delivery

Mindset & Collaboration

• Excellent decision-making skills in ambiguous and fast-changing environments

• Strong ownership, communication, and collaboration skills

• Passion for mentoring, coaching, and growing teams

• Growth mindset with continuous learning and adaptability

• Ability to work across adjacent domains (product, program, people management)

Qualification

• Bachelor’s degree in Computer Science, Engineering, or related field

• 10+ years of experience building large-scale distributed systems

• 5+ years as a technical lead or architect in identity management domain owning end-to-end system design

Additional Details

eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, veteran status, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at talent@ebay.com. We will make every effort to respond to your request for accommodation as soon as possible. View our accessibility statement to learn more about eBay's commitment to ensuring digital accessibility for people with disabilities.

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