Backend Applied Ai/ml Engineer jobs at Ebay in United States, Portland

About the team and role:

You’ll work on , while driving modernization of the native platform using Kotlin, Jetpack Compose, and modern Android architecture . The role involves deep collaboration with iOS, backend, and security teams to deliver cohesive, cross-platform identity solutions.

Job Requirements :

• 8+ years of professional experience in native mobile development.

• Bachelor’s degree in EE, CS, or a related field.

• Mastery of advanced Kotlin language features and Android APIs.

• Experience authoring shared libraries (internal or external distribution).

• Advanced debugging skills (emulator, adb, LLDB).

• Experience with Android CI/CD.

• Proven experience proposing and influencing technical strategy and roadmap, balancing short- and long-term objectives.

• Strong background designing and building scalable, distributed, and highly available systems.

• Solid knowledge of end-to-end system design from frontend to backend involving JavaScript frameworks, GraphQL/REST APIs, Messaging Systems, RDBMS/NoSQL, Containers, and Infrastructure layers. (GraphQL experience preferred.)

• Proficiency in multiple programming languages and frameworks, with deep mastery in at least one or two.

• Demonstrated ability to improve team velocity and code quality through strong engineering practices.

• Experience using AI tools to enhance productivity and efficiency.

• Excellent decision-making skills; thrives in ambiguity and change.

• Strong ownership mindset with exceptional interpersonal and cross-functional collaboration skills.

• Passion for mentoring and developing others; proven positive impact on team culture and technical growth.

Responsibilities:

• Translate requirements into software design and develop clean, efficient, and maintainable code.

• Own large functional areas and demonstrate deep technical expertise.

• Influence technical direction across domain teams and guide others toward sound architectural decisions.

• Improve team productivity by identifying and implementing opportunities for process and tooling enhancements.

• Design systems with flexibility in mind to accommodate future changes and improve engineering velocity.

• Collaborate effectively with cross-functional teams (product, design, backend,

  iOS
  , and security) to deliver innovative, high-impact solutions.

• Manage project features, break down work into sub-tasks, and drive execution by resolving technical blockers.

• Provide technical guidance, perform code reviews, contribute to and review Architecture Decision Records (ADRs), and mentor engineers within and across teams.

• Identify gaps and issues across systems, propose technical solutions, and help shape the engineering roadmap.

• Maintain a growth mindset and continuously seek learning opportunities through knowledge sharing and professional development.

The base pay range for this position is expected in the range below:

What you will accomplish

• Build and maintain eBay’s homepage/CMS backend engineering and machine learning stack

• Translate requirements to software design and create clean, efficient, extensible, maintainable code.

• Be responsible for a large functional area possessing in-depth knowledge and expertise.

• Influence across domain teams and guiding others towards the right technical decisions

• Design and build scalable, distributed and high-available systems, ensuring high-performant, responsive website and accessibility.

• Provide technical guidance, code review for immediate team and other teams, contribute and review ADRs (Architecture Decision Records), coaching, and mentorship to individual team members within and outside teams.

• Lead engineering support, release, and on-call responsibilities.

• Identify areas in the team applications and integrate flexibility in the design for these areas

• Improving engineering velocity.

What you will bring

• 6+ years of experience in working in JavaScript, GraphQL REST APIs, messaging systems and/or other backend programming languages.

• Hands-on experience building data-driven applications (RDBMS, NoSQL, ElasticSearch)

• A deep understanding of building scalable backend applications.

• Strong experience delivering results in fast-paced environments (agile, TDD, CI/CD)

• Passion for AI technologies (LLMs and Machine Learning)

The base pay range for this position is expected in the range below:

What you will accomplish :

• Collaborate with engineers, UX designers, and product managers in an agile environment to design, develop, test, and support high-quality, high-performance, visually appealing, and interaction-rich front-end products across all phases of the development cycle, ensuring compatibility across browsers and operating systems.

• Develop and maintain web applications using JavaScript/TypeScript, HTML, CSS, web UX component template language, web assembly, and Node.js. Design and develop responsive layouts, ensuring cross-browser and cross-platform compatibility and performance.

• Build rich web applications by improving browser local IndexedDB and web workers.

• Design and implement shareable UX components, libraries, tools, and processes to improve team development agility.

• Implement and manage CI/CD pipelines using tools like Jenkins and Git and integrate with backend APIs, focusing on performance tuning for both browser and Node.js virtual machines.

• Write and maintain automated tests using tools such as Playwright, Percy, or other testing frameworks and ensure code quality by writing well-structured, maintainable, and efficient code, incorporating CSS and JavaScript standard methodologies.

What you will bring:

• Prefer B.S. or M.S degree with 10+ years of experience in architecting, designing, and developing high-volume, highly interactive web applications that are compatible across various browsers and device types.

• Expertise in HTML5, CSS3 (using preprocessors like LESS or SASS), Content Delivery Networks (CDN), and advanced JavaScript/TypeScript development. Proficient in Ajax and web template technologies, with expert-level skills in server-side Node.js web application development.

• · Knowledge of automation testing tools and experience in writing automation tests to cover unit, component, and UI visual tests.

• Strong foundation in computer science, particularly in data structures and algorithms.

• Experience in non-functional skills like Security, Load and Performance Tests, Accessibility, Site Speed optimization, Cross-browser /Cross-platform UX Design.

The base pay range for this position is expected in the range below:

About the Role :

What you will accomplish :

• Crafting/giving functional and technical direction to a solution

• Test-driven development (TDD)/Behavior Driven Development (BDD), clean code, software craftsmanship

• Testing at all levels (unit, integration, UI and acceptance)

• Refactoring to enhance testability and re-usability

• Continuous delivery and integration

• Identify project risks, quantify risk/benefit relationships

What you will bring :

• Bachelor's degree from an accredited College or University in Computer Science or related major and 5+ years of mobile development experience

• Experience in iOS, Swift, Objective-C, and XCode as well as familiarity with the integration of network services

• Knowledge of GraphQL, REST is helpful

• Knows about Async/Await, concurrency, combine, UIkit, SwiftUI and various iOS development frameworks essential for Mobile Application development

• Full stack development experience is a bonus

The base pay range for this position is expected in the range below:

• Write clean, efficient, testable code in Java/Kotlin and Python.
  

• Apply modular design principles and ensure clear separation of concerns across service boundaries.
  

• Support the integration, deployment, and optimization of AI/ML models to enhance product functionality and system performance.
  

• Partner with cross-functional teams—including ML, data, product, and other engineering groups—to deliver high-quality solutions for eBay’s marketplace.
  

• Use AI-driven tools and modern engineering practices to accelerate development and improve productivity.
  

• Participate in architectural discussions and contribute to shaping the direction of backend and applied AI/ML systems.

• Proven software engineering experience with a strong focus on backend systems and production-grade services.
  

• Proficiency in Java/Kotlin and Python , with the ability to write clean, efficient, and maintainable code.
  

• Deep understanding of backend architecture, distributed systems, modular design principles, and core system design fundamentals.
  

• Strongly preferred experience with:
  

  • Applied AI/ML model integration
    

  • Hugging Face
    

  • PyTorch
    

  • Spring Boot
    

  • NoSQL databases
    

  • Spark
    

• Ability to learn new technologies quickly and effectively leverage AI tools to enhance engineering workflows.
  

• Bachelor’s or Master’s degree in Computer Science or a related field.
  

• 6–8 years working in software engineering roles.
  

• Excellent communication skills and a track record of collaborating successfully with geographically distributed teams.
  

• A passion for building high-quality, scalable software that delivers meaningful customer impact.

The base pay range for this position is expected in the range below:

What you will accomplish:

• Independently lead sophisticated, high-impact initiatives within eBay’s selling inventory management domain, from conception to successful production rollout.

• Architect, design, and develop cross-data center distributed, fault-tolerant, highly available, and performant web services and applications with expert software architecture design, OOA/D skills, and outstanding analytical and problem-solving abilities.

• Championing excellence by promoting clean architecture, modern frameworks, quality gates, and alignment to design patterns and coding standards.

• Elevate the engineering bar through meticulous design/code reviews, operational excellence (SLOs, observability, incident management), and scalable practices that enhance team velocity.

• Act as a technical mentor, guiding senior and junior engineers on architecture standard methodologies and advanced problem-solving and introduce AI-first frameworks and reusable components to reduce developer friction and enable faster iteration.

• Automate diagnostics, monitoring, and remediation using intelligent assistants and prediction-based alerting.

• Lead by example: write reference implementations, contribute to core libraries and services, and conduct in-depth code reviews to influence standards and uplift team capabilities.

• Develop well-structured Architecture Decision Records (ADRs) and contribute to user documentation and standards.

• Estimate engineering effort, plan implementation, and manage system changes. Proactively identify and recommend mitigation strategies for project technical risks.

What you will bring:

• Prefer a BSCS, MSCS, or a similar technical degree with 14+ years of experience in crafting and developing highly scalable distributed platforms, internet-scale web applications, 4+ years as a staff/architect-level technical lead across multiple domains.

• Expert, hands-on experience in Java, Spring Framework, GraphQL Service and schema design, Design Patterns, OOA/D, Data Structures, REST, JSON, and Internet Protocols, any experience in Federated GraphQL schema design and implementation is a significant plus.

• Proficiency in Java and/or Scala, with a strong foundation in data structures, algorithms, multithreading, synchronization, and concurrent programming. Deep architectural understanding of system design and a proven ability to lead projects to completion.

• Solid knowledge and experience with relational databases (Oracle) and/or NoSQL data technologies (Mongo, Cassandra, Couchbase), ElasticSearch, and related toolsets.

• Strong collaboration skills, with the ability to influence multi-functional and cross-geography teams to deliver results. Excellent time management skills and ability to work on concurrent assignments with different priorities.

• Demonstrated experience driving architecture discussions, producing well-documented design documents, participating in design and code reviews, and contributing to coding and unit testing of fault-tolerant applications.

• Solid understanding of computer science fundamentals, data structures, and algorithms, coupled with up-to-date knowledge in advancements in Web technologies and a drive for innovation.

• Proven ability to mentor senior engineers, influence organization-wide practices, and make long-term architectural decisions that unlock measurable business outcomes.

The base pay range for this position is expected in the range below:

What you will accomplish:

• Architect the development of Selling features in the Android application with Native Android app development and converting ideas, designs and requirements to concrete stable production builds

• Coordinate and collaborate with the Product and Engineering team to identify problems, come up with creative solutions, and help with tracking and delivering within the release plan

• Understand and implement Android specific design patterns and experience with Android Studio, Java, Kotlin, Jetpack Compose, Dagger, network debugging (e.g. Charles), revision control systems (e.g. Git) and bug tracking (e.g. Jira)

• Develop and iterate within a rather lean, yet very fast-paced Engineering team, develop code and testing methodologies to improve the DevOps "Four Key Metrics"

What you will bring:

• Prefer B.S Degree or equivalent experience in Computer Science or equivalence with 7+ years of experience developing Android applications, with deep experience in Kotlin, Jetpack Compose, Hilt/Dagger, & GraphQL

• Proven experience in unit testing and functional UI testing with JUnit / Espresso, well versed in SOLID principles and with Android Studio

• Experience with modern design patterns such as MVVM, Dependency Injection, etc.

• Experience with Agile/Scrum methodologies, working with services teams to develop optimal mobile services contracts

• Any additional experience working on large scale applications encompassing dozens of features, patterns for achieving feature modularity, reactive programming using RxJava / RxKotlin and Jetpack Compose are preferred.

The base pay range for this position is expected in the range below: