Senior Java Engineer

Senior Java Engineer

Streaming Ad Server

Los Angeles, CA

New York City, NY

Hybrid Schedule (M/F remote, T/W/TH in-office)

At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and we’re looking for people to help us tackle that responsibility with creativity and focus.  Magnite (NASDAQ: MGNI) is the world’s largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio. Our tech fuels billions of transactions per day!

We’re the Ad Server Engineering team at Magnite, responsible for building and maintaining the core systems that power real-time ad delivery across display and CTV platforms. Our team owns high-throughput services involved in auction handling, bid evaluation, and creative rendering—ensuring performance, reliability, and compliance at scale.

We are looking for a Senior Java Engineer to join our Streaming Ad Server Engineering team. You will be responsible for building high-performance, scalable systems that process millions of queries per second, contributing to both feature development and performance optimizations across our ad-serving stack. You’ll work closely with engineering leads and cross-functional partners to modernize legacy systems, introduce new technologies like Vert.x, and deploy highly observable and reliable services on AWS and on-prem infrastructure.

Key Responsibilities:

• Design, develop, and maintain scalable and efficient Java-based applications for ad serving.

• Leverage frameworks like Vert.x to build non-blocking, event-driven systems.

• Write optimized, clean, and maintainable code with a strong emphasis on Java Collections and multithreading.

• Collaborate with product managers and engineering teams to design and implement new features supporting real-time bidding (RTB), ad delivery, and analytics.

• Ensure that all code meets performance, security, and scalability standards.

• Optimize system throughput and latency using profiling tools, concurrency patterns, and JVM tuning.

• Analyze and improve application performance with a deep understanding of Java concurrency models, thread pools, and memory management.

• Build and maintain services deployed on AWS ECS, K8s, and on-prem environments.

• Work with caching and storage systems like Memcached, Aerospike, and RDS.

• Utilize modern Docker approaches for containerization and contribute to CI/CD pipelines for continuous deployment.

• Implement robust monitoring and alerting using Datadog, CloudWatch, and other logging frameworks.

• Use metrics and distributed tracing to detect issues early and improve reliability.

•  4–6 years of professional experience in Java development, with strong fundamentals in data structures, algorithms, and object-oriented design.

• Deep experience with Vert.x or similar non-blocking frameworks.

• Strong command of Java Collections, concurrency, and multithreaded programming.

• Experience deploying and managing services in AWS (ECS, RDS, S3, CloudWatch) and on-prem environments.

• Hands-on experience with caching systems (e.g., Redis, Memcached) and NoSQL/SQL databases (e.g., Aerospike, MySQL).

• Familiarity with monitoring tools (Datadog, Prometheus, Grafana) and distributed tracing.

• Strong debugging and performance tuning skills.

Nice to Have

• Prior experience in the Ad Tech industry or familiarity with Real-Time Bidding (RTB) and programmatic advertising.

• Experience with Spring Boot, SonarQube, Terraform, or Kubernetes.

• Understanding of container orchestration using Kubernetes or EKS.

Perks and Benefits

• Comprehensive Healthcare Coverage from Day One

• Generous Time Off  

• Holiday Breaks and Quarterly Wellness Days

• Equity and Employee Stock Purchase Plan

• Family-Focused Benefits and Parental Leave 

• 401k Retirement Savings Plan with Employer Match

• Disability and Life Insurance

• Cell Phone Subsidy

• Fitness and Wellness Reimbursement

Company Culture

We believe collaboration is essential to success. Magnite’s hybrid schedule includes two days worked remotely (Monday and Friday) and three days on-site (Tuesday, Wednesday and Thursday). Our offices provide catered lunches, beverages, snacks, training and development, and office events to support your work week.  We also understand you have appointments, families, hobbies, and other commitments. Magnite strives to maintain a healthy work/life integration for all employees so you can bring your best every day - both at work and at home.

• Community Service and Volunteer Events

• Company-Matched Charitable Contributions

• Wellness Coach and Mental Health Support

• Career Development Initiatives and a Career Growth Framework

• Culture and Inclusion Programs

• Bonusly Peer-to-Peer Recognition Program

About Us

The world's leading agencies and brands trust our platform to access brand-safe, high-quality ad inventory and execute billions of advertising transactions each month. Anchored in bustling New York City, sunny Los Angeles, mile-high Denver, historic London, and down under in Sydney, Magnite has offices across North America, EMEA, LATAM, and APAC.

In New York, the base salary range for this position is: $140,000 - $160,000 in addition to an annual variable bonus based on performance and company equity (NASDAQ: MGNI). 

In California, the base salary range for this position is: $140,000 - $160,000 in addition to an annual variable bonus based on performance and company equity (NASDAQ: MGNI).  

For Los Angeles-based applicants: 

Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

The material job duties of this specific job position for which Magnite reasonably believes that a criminal history may have a direct, adverse, and negative relationship include:

• Having access to the Company’s Confidential Information or trade secrets including data related to customers, clients, vendors, business partners, or suppliers 

• Work with cross teams  to access datasets, databases, formulas, algorithms, tools, products, prototypes, systems applications, and technologies in any stage of development 

Magnite is an Equal Opportunity Employer and does not discriminate against applicants due to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation or any other federal, state or local protected class.

Our Commitment: We aim to incorporate a wide range of voices into our Magnite culture, cultivating an environment where employees feel welcomed, cared for, and encouraged to freely share ideas. We are committed to employee growth, collaboration, inclusion, and innovation.  We invest in Magnite’s local communities. We seek talent from all backgrounds to champion corporate values of seeing the big picture and being catalysts of change.

Want to learn more about us?  

Check out our blog for Magnite announcements and Ad Tech industry news! 

Recruiting Agency Notice

Magnite does not accept agency resumes and is not responsible for any fees related to unsolicited resumes.