Senior Backend Engineer

RemoteRemotePosted 6 weeks ago

Role Overview

Humansignal is hiring a Senior Backend Engineer. This is a full-time remote role, with the team based in Remote. Part of Humansignal's Backend hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.

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PythonSQLGraphQLReactDjangoAWSKubernetesRedis

Job description

About HumanSignal

Real-world data is the competitive edge in AI.

HumanSignal is a human data partner for companies building AI models and products. Our customers ship better AI, faster, because we partner with their researchers from real-world data creation to annotation to delivery.

We design and create datasets from scratch, recruit and manage the domain experts who evaluate model output, and run everything through our own platform, Label Studio, the open-source standard for data labeling and evaluation, used by over 1 million practitioners worldwide.

We specialize in the operationally complex: real-world data collection, multimodal pipelines, and multi-step workflows. Advanced ML and AI teams use our enterprise platform to run their own data factories, and our services team to extend their reach where in-house capacity runs out.

If you want to do work that materially shapes how the next generation of AI products gets built, we'd love to talk.

This is a product-engineering role: not “build what you’re told,” but shape what we build—own the problem, propose solutions, and ship outcomes that matter to users and the business.

About the role

We’re hiring a Senior Backend Engineer with product vision. You’ll design and operate services in Python/Django that power labeling and evaluation workflows at scale: clean API contracts, robust data models, efficient background jobs, and dependable performance. You’ll partner early with PM/Design/FE to frame problems, prototype to learn, and make pragmatic scope calls—so complex workflows feel simple, reliable, and fast for users.

Responsibilities

Design, build, and operate backend services/APIs in Python/Django with Postgres/Redis.
Own outcomes, not tasks: refine scope, suggest trade-offs, and land increments that deliver value quickly and safely.
Model data and author migrations; tune queries and caching; manage background jobs/queues for high-volume workflows.
Evolve API contracts with FE; keep interfaces clear, versioned, and resilient to change.
Improve reliability and performance (timeouts, retries, idempotency, rate limits, pagination, backpressure).
Implement secure, multi-tenant patterns: auth, permissions/RBAC, auditability, and safe data boundaries.
Contribute to testing strategy (unit/integration), error handling, and graceful failure modes.
Partner with Support to investigate production issues and turn learnings into fixes and prevention.
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.

What you’ll bring

Senior-level experience shipping production backends in Python/Django (or a close equivalent) and SQL.
Strong product sense: you’ve made scope/trade-off decisions and iterated based on real-world usage and feedback.
Depth in REST API design, relational modeling, migrations, and performance tuning.
Experience with background processing/queues (e.g., Celery/RQ/Kafka-backed workers) and operational concerns.
Clear written communication at a Senior IC level—concise RFCs/PRDs, actionable reviews, and crisp decision records.
Nice to have: GraphQL familiarity; Kafka/streaming; Spark/BigQuery; security/compliance exposure; multi-region architectures.

Our stack

Python/Django, JS/TS, React, OpenAI API, Spark, BigQuery, Kafka, Jest, Cypress, AWS, Kubernetes, Postgres, Redis.

How we build

Trunk-based development with small, reviewable PRs; feature flags for safe rollouts; strong code reviews; pragmatic testing; and close collaboration with Product/Design/Support.

How we work

At HumanSignal, we follow a six-week cycle known as "Build and Ship" followed by a "Cooldown." During the first four weeks, the team focuses on creating new features and shipping improvements. We also rotate a small group to handle customer support, ensuring everyone stays in touch with real user needs and we can respond quickly to issues.

After those four weeks, we have a two-week "Cooldown" period. This is when we tackle technical debt, refine our integration processes, and wrap up those lingering tasks that never quite fit into regular sprints but really help us feel good about our codebase and workflows.

Location & Compensation

At HumanSignal we pay based on regional compensation market rate ranges across the globe. We are hiring for this role across North and South America as well as Europe. The base cash compensation range is $140,000 to $200,000 USD. These ranges are provided by market data and are in good faith. The final offer details are determined by several factors including candidate experience, expertise, as well as applicable industry knowledge and may vary from the pay ranges listed above.

It’s an exciting time at HumanSignal. We’re growing quickly, and roles evolve as we learn. We’ve put thought into your first initiatives, but we’ll refine them together. If this sounds exciting, come build with us.

About Humansignal

Humansignal

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Frequently Asked Questions

How do I apply for the Senior Backend Engineer position at Humansignal?

Use the Apply button above to submit your application directly to Humansignal. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Is the Senior Backend Engineer role at Humansignal remote?

Yes. This is a remote role. The team is based in Remote, but the position itself does not require relocating to that office.

What does a Senior Backend Engineer at Humansignal earn?

Humansignal has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Senior Backend Engineer role at Humansignal posted?

This role was posted on May 28, 2026 (43 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

How much experience does the Senior Backend Engineer role at Humansignal require?

This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. Humansignal lists their specific requirements in the description below, so review the must-have qualifications closely before applying.

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