Principal Software Engineer
Confirmed on the employer's own hiring board on Oct 12, 2026. First seen by Alion on Oct 11, 2026.
Responsibilities
Who We Are:
SiriusXM and its brands (Pandora, SiriusXM Media, AdsWizz, Simplecast, and SiriusXM Connect) are leading a new era of audio entertainment and services by delivering the most compelling subscription and ad-supported audio entertainment experience for listeners - in the car, at home, and anywhere on the go with connected devices. Our vision is to shape the future of audio, where everyone can be effortlessly connected to the voices, stories and music they love wherever they are.
This is where a diverse group of emerging talent and legends share authentic and purposeful songs, stories, sounds and insights through some of the best programming and technology in the world. Our critically acclaimed, industry-leading audio entertainment encompasses music, sports, comedy, news, talk, live events, and podcasting. Regardless of their role, each of our employees is vital in bringing SiriusXM’s vision to life daily.
SiriusXM Media is the gateway for marketers to North America's most prominent digital audio advertising ecosystem. As the combined advertising revenue organization of SiriusXM Holdings Inc., SiriusXM Media spans across leading owned and operated audio platforms Pandora and SiriusXM; innovative ad tech solutions powered by AdsWizz; sonic creative consultancy Studio Resonate; and an extended content network featuring exclusive monetization agreements with Audiochuck, NBC Universal, SoundCloud, and many more. Reaching more than 150 million listeners each month, SiriusXM Media delivers audiences the tailored brand experiences they crave while putting creators first, making it easy for every marketer to produce, plan, buy and measure across its entire audio universe.
About AdsWizz
AdsWizz, a subsidiary of SiriusXM, is the leading global provider of digital audio and podcast advertising solutions. AdsWizz is the underlying monetization solution for well-known music platforms, podcasts, and broadcasting groups worldwide, giving advertisers of all sizes unprecedented access to premium and niche audio content. Through dynamic ad insertion, advanced programmatic platforms, and innovative audio formats, AdsWizz efficiently connects buyers and sellers for digital audio and podcast advertising. AdsWizz is a global company with a presence in over 40 countries and a Technology Development Hub in Bucharest, Romania.
How you’ll make an impact:
As a Principal Software Engineer, you will be a senior technical leader on the Audience Insights team, building the systems that power realtime audience augmentation, identity-aware targeting, contextual/content analysis, and large-scale batch data processing across the AdsWizz advertising platform. You will help guide architecture and design across low-latency services, high-throughput data stores, event-driven workflows, and batch enrichment pipelines, partnering with other senior technical leaders to improve performance, reliability, privacy, and operational excellence.
What you’ll do:
Design and build high-performance audience intelligence systems that support realtime ad targeting, augmentation, and activation across the AdsWizz platform.
Evolve low-latency services, APIs, protocols, and data access layers backed by high-throughput stores such as Aerospike.
Lead architecture for batch and streaming data workflows using technologies such as Kafka/MSK, SQS, S3, Parquet, PySpark, Go, Rust, and C++.
Translate privacy, consent, and governance requirements into robust engineering designs for safe handling of listener identity and audience data.
Partner with product, data, operations, and infrastructure teams to align technical architecture with business goals and production reliability.
Work with various teams of engineers building software in a collaborative development process.
Execute tasks with utmost clarity and precision, demonstrating a strong sense of ownership and providing clear direction to drive projects forward effectively.
Collaborate with the Product team to clarify the scope of the projects by giving thoughtful feedback which challenges and clarifies requirements intent.
Collaborate with the Global Operations and Cloud Infrastructure teams to ensure flawless production deployments and support the Incident Management team.
Responsible for conducting technical interviews as needed, ensuring a consistently high bar for engineering excellence and performance standards.
Responsible for mentoring/growing junior engineers
What you’ll need:
Bachelor’s Degree in Computer Science/Mathematics or a similar field.
Strong understanding of engineering software processes, lifecycle methodology, configuration management, release management, and system verification and testing.
Ability to work independently and oversee entire projects or significant parts, focusing on completing the tasks on time.
Proven ability to research and become proficient in new technologies
Strong analytical and problem-solving skills, with meticulous attention to detail and a dedication to continuous improvement.
Proficiency in constructing detailed software architecture diagrams
Interpersonal skills and ability to interact and work with staff at all levels.
10+ years of backend engineering experience; 3+ years in senior/principal IC roles
6+ years of software engineering experience in C++/ Python/ Rust/ Go programming language
4+ years of experience microservices development supporting scalable products, utilizing diverse cloud platforms (ideally AWS)
Mandatory technical expertise in the following areas:
Experience building and operating low-latency, high-throughput backend systems in production.
Strong programming experience in one or more of C++, Go, Rust, or Python, with ability to work across languages.
Experience with distributed datastores or key-value stores such as Aerospike, DynamoDB, Redis, or similar.
Experience with event-driven or message-based systems such as Kafka/MSK, SQS/SNS, ZeroMQ, or similar.
Experience with batch data processing patterns using S3, Parquet, Spark/PySpark, Athena/Glue, or similar technologies.
Production experience with AWS, Docker, CI/CD, observability, and infrastructure-as-code.
Strong architecture, mentoring, and cross-team technical leadership skills.
We consider a plus having relevant expertise in any of the following areas:
Experience with ad tech, audience targeting, identity resolution, consent/privacy-aware data systems, or contextual targeting.
Experience with protobuf/gRPC, high-performance C++ services, or Rust/Go service development.
Experience with observability tools such as Prometheus, Grafana, CloudWatch, ELK/OpenSearch, or similar.
Experience using AI coding assistants thoughtfully in software development workflows.
Our offer - what’s in it for you:
Casual & friendly working environment with opportunities to impact the company with your ideas and involvement
Technology diversity, interesting technical exposure in building the best ad-tech product on the market
Corporate annual bonus system to celebrate personal and company wins
Individual training budget to use as you like for skill improvement
Sports bonus for activities such as gym, biking, and yoga
Meal tickets card for enjoyable lunch breaks
Gift cards for special events and holidays
Days off for your birthday and special events, to recharge and enjoy your BIG moment
Private medical subscription to keep you healthy
Private Pension Fund (Pillar III) based on your years of tenure
Free library subscription for the book lover in you
Good hardware devices (new laptops / Macs, displays etc.)
Parking lots at office location - 60% co-funded by the company
Company offsites, CSR activities, and getaways to stay connected and keep the flame alive
Our goal at SiriusXM is to provide and maintain a work environment that fosters mutual respect, professionalism, and cooperation. SiriusXM is an equal opportunity employer that does not discriminate based on actual or perceived race, creed, color, religion, national origin, ancestry, alienage or citizenship status, age, disability or handicap, sex, gender identity, marital status, familial status, veteran status, sexual orientation or any other characteristic protected by applicable federal, state or local laws.
The requirements and duties described above may be modified or waived by the Company in its sole discretion without notice.
#LI - AV1