Skip to content
WHOOPWHOOPBoston, MA

Software Engineer I (Backend)

Entry-level backend engineer contributing to services and APIs powering WHOOP's member features using Java, Kafka, Postgres, and AWS. Collaborates cross-functionally to build scalable, reliable systems with professional backend experience or equivalent.

Salary not listed
On-siteEntry levelBackend Engineering

About the role

Responsibilities

  • Contribute to the development and maintenance of backend services and APIs that power WHOOP’s member-facing features using technologies such as Java, Kafka, Postgres, and AWS.
  • Collaborate with cross-functional partners across Product, Design, Data Science, and Engineering to translate requirements into well-scoped technical solutions.
  • Write clean, maintainable, and well-tested code while participating in code reviews to continuously improve engineering quality and standards.
  • Support the operation and monitoring of production systems, helping to troubleshoot issues and ensure reliability, scalability, and performance.
  • Break down feature requirements into actionable tasks, identify risks early, and iterate quickly to deliver value to members.
  • Contribute to technical documentation and knowledge sharing to support team velocity and long-term maintainability.

Qualifications

  • Professional experience in backend software development (internship, co-op, or academic project experience acceptable).
  • Experience building or interacting with RESTful APIs and relational databases (e.g., Postgres or similar SQL-based systems).
  • Proficiency in an object-oriented programming language such as Java, or demonstrated ability to quickly learn new backend technologies.
  • Familiarity with version control systems such as Git and standard development workflows.
  • Understanding of fundamental computer science concepts including data structures, algorithms, and system design basics.
  • Interest in distributed systems, event-driven architectures (e.g., Kafka or similar technologies), and cloud platforms such as AWS.
  • Strong problem-solving skills and a growth mindset, with a willingness to seek feedback and continuously improve.
  • Effective communication skills and the ability to collaborate within a cross-functional team environment.

Skills

JavaKafkaPostgresAWSREST APIsGitSQLDistributed SystemsEvent-Driven Architectures
Upstart

Software Engineer, Upstart Bank

UpstartUnited States

Software Engineer on the Upstart Bank team building scalable backend systems, services, and APIs in a regulated fintech environment. Requires 2+ years experience, proficiency in a modern language (Java, Python, Go, etc.), and strong fundamentals; fintech or regulated industry experience preferred.

131k – 154k/yr
Remote2+ YOEBackend Engineering
Mirage

Software Engineer, Backend

MirageNew York, NY

Backend engineer building and owning end-to-end services, APIs, data pipelines, and ML infrastructure to power an AI-native video platform. Requires 2+ years experience shipping production systems, strong problem-solving, and comfort integrating large generative AI models.

175k – 275k/yr
On-site2+ YOEBackend Engineering
Reddit

Backend Engineer, Moderation Enforcement

RedditNew York, NY +3

Backend Engineer building moderation tools and features for Reddit's communities. Requires 2-5 years experience, proficiency in Go or Python, and API design skills.

164k – 230k/yr
Remote2+ YOEBackend Engineering
TheGuarantors

Software Engineer

TheGuarantorsNew York, NY

Build and maintain scalable backend services and APIs for third-party client integrations on a developer-facing platform. Requires 2+ years building backend services (Go preferred), strong API and system design skills, SQL experience, and cloud/IaC knowledge.

125k – 145k/yr
Hybrid2+ YOEBackend Engineering
Wowza Media Systems

Junior Java Engineer

Wowza Media SystemsUnited States

Senior Java engineer building and optimizing live/on-demand video transcoding, packaging, and delivery pipelines in Wowza Streaming Engine. Requires 8+ years Java experience with deep concurrency/JVM knowledge plus 5+ years in video streaming codecs and protocols.

Salary not listed
Remote8+ YOEBackend Engineering