Sr. Software Engineer, Content AI

Peloton Interactive; Warszawa; On-site; PLN 300,000 - 420,000; Full time

Job summary

Peloton Interactive is seeking a Senior Software Engineer to lead an agile team building scalable microservices powering core features across Bike, Tread, and Digital platforms. You will design, develop, test, deploy, and monitor APIs, mentor engineers, and collaborate with Product, Design, and QA to deliver high- impact services with reliability and performance in a fast-growing environment.

Expect on-call rotation and global cooperation.

Qualifications

• Degree in Computer Science, Engineering, or Mathematics.
• 6+ years of software development experience building backend cloud systems.
• Strong knowledge of Kotlin, Python, or similar languages.
• Experience with Spring Boot, web frameworks, and microservices.

Responsibilities

• Design, develop and operate business-critical APIs and services with high availability, low latency, security and scalability.
• Mentor junior engineers and communicate with TPM and Product.
• Write clean, well-tested code for maintainability and scalability.
• Architect reusable code and patterns across teams.
• Lead architecture discussions and reviews; drive incident response and on-call efforts.
• Collaborate with Product, Design, and QA as a domain expert.

Skills

Leadership

Mentorship

API design

Programming languages

Education

MS or BS in CS/Engineering/Math

Tools

Docker

Kubernetes

Terraform

GitHub Actions

Jenkins

Datadog

PostgreSQL/MySQL

Job description

The Senior Software Engineer acts as the technical lead for an agile team, focusing on the design and development of scalable microservices for Peloton's core features across all platforms (Bike, Tread, Strength, and Digital). The Content AI Team is responsible for training and hosting various models in the domains of Natural Language Processing (NLP) and Automatic Speech Recognition (ASR). This role is highly collaborative, requiring close partnership with Product, Design, and QA throughout the development lifecycle. The candidate will be responsible for designing, developing, testing, deploying, and monitoring microservices that specifically power features like search, voice, and captions, which are crucial for platform expansion and international growth. In addition to technical delivery, excellent communication and engineering skills are essential for providing guidance to junior team members and effectively coordinating with other stakeholders, such as Technical Program Managers (TPM).

YOUR DAILY IMPACT AT PELOTON

• Design, develop and operate business-critical APIs and services with a focus on high availability, low latency, security and scalability
• Mentor junior engineers in the team and communicate effectively with TPM and Product
• Write understandable, well tested code with an eye towards maintainability and scalability
• Architect and build reusable code, libraries, and patterns for use across teams
• Propose, experiment, and implement solutions to scale services while meeting business and product requirements.
• Leverage production monitoring/profiling/tracing and load testing tools to discover bottlenecks and using techniques such as data modeling, query optimization, and caching to address the bottlenecks
• Lead technical discussions during architecture meetings, design reviews, and task breakdown
• Identify common patterns as well as develop and foster development of reusable components and standards across teams
• Champion and implement industry best practices such as feature toggles, CI/CD, test automation, logging, and monitoring in order to ensure confidence in our release process
• Mentor and coach engineers through code reviews, pair programming, and technical guidance
• Participate in on‑call rotations and lead incident response efforts to maintain system reliability
• Collaborate and partner with cross‑functional team members from Product, Design, and QA whilst serving as a domain expert in your area

YOU BRING TO PELOTON

• MS or BS degree in fields such as Computer Science, Engineering or Mathematics.
• 6+ years of software development experience building high-performance, highly scalable backend cloud application systems
• Expertise in Kotlin, Python, or similar languages
• Strong experience with Spring Boot, Bottle/Gunicorn, or similar backend web frameworks (JVM or Python)
• Experience with both relational (e.g. PostgreSQL, MySQL) and NoSQL (e.g. DynamoDB, Mongo) databases
• Hands‑on experience with Elastic Search query optimization and scaling
• Experience with caching systems such as Memcache, Redis
• Experience with request processing such as REST, gRPC, or GraphQL
• Proven ability to work in high growth, fast‑paced environments and adapt to change
• Experience with Docker and Kubernetes for containerization and orchestration
• Experience with AWS services (DynamoDB, S3, ECR, IAM, Lambda, SQS) and cloud infrastructure design
• Experience with deployment tooling such as Terraform, GitHub Actions, Jenkins
• Experience with observability and monitoring tools such as Datadog or similar APM solutions
• Strong understanding of API design principles, security best practices, and performance optimization
• Experience with production support, leading incident response, and troubleshooting complex distributed systems
• Experience collaborating with and influencing cross‑functional team members from Product, Design, and QA

Bonus Points

• Experience with building personal voice digital assistants or chatbots
• Experience with building search platforms, personalizing search and discovery
• Worked with automatic speech recognition (ASR)

Peloton is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. Equal employment opportunity has been, and will continue to be, a fundamental principle at Peloton, where all team members, applicants, and other covered persons are considered on the basis of their personal capabilities and qualifications without discrimination because of race, color, religion, sex, age, national origin, disability, pregnancy, genetic information, military or veteran status, sexual orientation, gender identity or expression, marital and civil partnership/union status, alienage or citizenship status, creed, genetic predisposition or carrier status, unemployment status, familial status, domestic violence, sexual violence or stalking victim status, caregiver status, or any other protected characteristic as established by applicable law. This policy of equal employment opportunity applies to all practices and procedures relating to recruitment and hiring, compensation, benefits, termination, and all other terms and conditions of employment. If you would like to request any accommodations from application through to interview, please email: [e-mail]. Qualified applicants 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 City of Los Angeles Fair Chance Initiative for Hiring Ordinance and the San Francisco Fair Chance Ordinance, as applicable to applicants applying for positions in these jurisdictions.