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Senior Backend Engineer

3 weeks, 6 days ago
Europe, North America
Full-time
Senior
Backend Engineer
Software Development
Apache Spark AWS Celery Cypress Django GCP GraphQL JavaScript Jest Kafka Kubernetes PostgreSQL Python React Redis REST API SQL TypeScript
Apply Now
HumanSignal

HumanSignal

HumanSignal is a data labeling platform for machine learning and AI that offers flexibility, security, and scalability. It supports all data types, formats, ML backends, and storage providers, enabling users to prepare training data, fine-tune models, ...

Internet Software & Services
1-10
$25M raised
View All Jobs 18

Description

  • Design, build, and operate backend services and APIs in Python/Django with Postgres and Redis.
  • Own outcomes by refining scope, making trade-offs, and shipping incremental value safely.
  • Model data, write migrations, tune queries and caching, and manage background jobs and queues for high-volume workflows.
  • Evolve API contracts with frontend engineers to keep interfaces clear, versioned, and resilient to change.
  • Improve reliability and performance through timeout handling, retries, idempotency, rate limiting, pagination, and backpressure.
  • Implement secure multi-tenant patterns including authentication, permissions/RBAC, auditability, and safe data boundaries.
  • Contribute to testing strategy, error handling, and graceful failure modes.
  • Partner with Support to investigate production issues and turn findings into fixes and preventative improvements.
  • Engage with the open-source community to understand real-world needs and improve developer experience.
  • Participate in architecture discussions and code reviews while mentoring teammates and improving codebase patterns.

Requirements

  • Senior-level experience shipping production backend systems in Python/Django or a close equivalent.
  • Strong SQL experience.
  • Demonstrated product sense with experience making scope and trade-off decisions based on real-world usage and feedback.
  • Depth in REST API design, relational data modeling, database migrations, and performance tuning.
  • Experience with background processing and queues such as Celery, RQ, or Kafka-backed workers.
  • Clear written communication skills at a senior individual contributor level, including RFCs, PRDs, reviews, and decision records.
  • Nice to have: GraphQL familiarity.
  • Nice to have: experience with Kafka or streaming systems.
  • Nice to have: experience with Spark or BigQuery.
  • Nice to have: security or compliance exposure.
  • Nice to have: experience with multi-region architectures.

Benefits

  • Base cash compensation of $140,000 to $200,000 USD.
  • Regional compensation based on market rates.
  • Hiring across North and South America as well as Europe.
  • Six-week build-and-ship cycle with a two-week cooldown period.
  • Rotating customer support coverage to stay close to user needs.
  • Opportunity to work on a fast-growing product with evolving responsibilities.

Interested in this position?

Apply directly on the company website

Apply Now

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