# Senior Full Stack Engineer
**Company:** [HumanSignal](https://hotfix.jobs/companies/humansignal)
**Location:** Remote
**Salary:** $140K-$200K
**Skills:** React, TypeScript, Python, Django, SQL, Rest, Postgres, Redis, Kubernetes, AWS, Jest, Cypress, BigQuery, Spark, Kafka
**Posted:** 2025-12-05
> Build end-to-end features for AI data labeling platform using React/TypeScript frontend and Python/Django backend. Own product decisions, APIs, performance, and collaborate with PM/Design on complex workflows. Requires senior full-stack experience and strong product sense.
## Job Description
## Responsibilities

- Build full-stack features: React/TypeScript on the client; Django/REST services, data models, and background jobs on the server.
- Own outcomes, not tasks: refine scope, suggest trade-offs, propose simpler approaches, and land increments that deliver value fast.
- Design clean API contracts and evolve schemas/migrations; improve performance and reliability (query tuning, caching, job orchestration).
- Partner with Product & Design from discovery to delivery: clarify user jobs, write lightweight RFCs/PRDs, and shape scope and milestones.
- Keep UIs accessible and responsive; add solid error-handling and failure-mode UX.
- Raise engineering standards: testing strategy, code quality, observability hooks, resilience patterns.
- Partner with Support to investigate production issues, reduce UX papercuts, and turn learnings into fixes.
- Engage with our open-source community (issues, discussions) to understand real-world needs and improve developer experience.
- Participate in architecture discussions and code reviews; mentor teammates and improve patterns across the codebase.

## Requirements

- Senior-level experience shipping production full-stack features (**React/TypeScript + Python/Django + SQL**).
- Strong product sense: you’ve made scope/trade-off decisions and iterated based on real-world usage and feedback.
- Fluency with modern FE tooling (e.g., **Vite/Webpack, Jest/Cypress**) and state-management patterns.
- Backend depth: **REST API design**, relational modeling, migrations, performance tuning, and background job patterns.
- Excellent communication at a Senior IC level—you write clear RFCs/PRDs, give actionable reviews, and present trade-offs well.

## Nice to Have

- **GraphQL** familiarity; **Kafka/queues/streaming**; **Spark/BigQuery**; **auth/RBAC**; multi-tenant SaaS; design-system experience.

## Compensation

- Base cash compensation range: **$140,000 to $200,000 USD**.
**Apply:** https://hotfix.jobs/jobs/senior-full-stack-engineer-at-humansignal-3a08981f-199b-4772-a52c-20e56f80f7e4
**Canonical:** https://hotfix.jobs/jobs/senior-full-stack-engineer-at-humansignal-3a08981f-199b-4772-a52c-20e56f80f7e4