Lead​/Senior+ Back End Engineer

Location

California

Full time

Hybrid

Engineering Platform Engineering

About us

, we’re on a mission to enable top talent around the world to participate in the development of cutting‑edge AI models.

In coming years, AI models will transform how we work and create thousands of new AI training jobs for skilled talent around the world. We’ve joined forces with top AI and crowd researchers at Anthropic, Character.

AI, Imbue, Stanford, and University of Pennsylvania to build a fair and ethical platform for AI developers to collaborate with domain experts to train bespoke AI models.

About this role

We’re seeking a Senior+ Backend Engineer to join our platform engineering team. You’ll play a pivotal part in developing the next‑generation human data collection through building infrastructure for AI/ML development, driving product strategy, and directly impacting our startup trajectory.

You'd be a great fit at Pareto if

• You move the needle for your team forwards, not backwards. Those you have worked with in the past view you as a resource and come to you for support, and want to work with you again.

• You value dedicated teamwork, respect, and curiosity
  , as well as navigating communication in cross‑functional, culturally diverse environments.

• Engineering excellence is your pursuit
  , demonstrated by your solid understanding of back‑end languages and web frameworks like Django.

• You are not content with the status quo and consistently seek innovative solutions to existing problems, with a commitment to personal and collective growth.

Key responsibilities

• Owning – truly owning – the backend from architecture and specifications through to ensuring reliable, live deployments.

• Ability to understand, translate, breakdown and estimate the product roadmap into features.

• Lead user testing sessions with stakeholders on some of the features you implement.

• An understanding of optimization, security and an eye for code cleanliness.

• Contribute to maintaining a best‑in‑class quality pipeline, encompassing Linting, CI/CD, and usability tests.

What you’ll need
:

• Ambition to be consistently testing and optimizing code and queries.

• Enough professional experience that positions you to be flexible, reliable and move quickly.

• Proficiency in Python and a recent web framework.

• Professional experience with Django – this means true professional experience. You understand how to optimize; you understand its shortcomings; you are able to build and structure things intuitively. Otherwise, the desire and ability to learn quickly.

• Knowledge of different database systems — we use Postgres and Clickhouse.

• An eye for security practices.

• Familiarity with product and design life cycles, collaborating with designers and product managers.

• Proven ability to write high‑quality, well‑tested, and maintainable code.

• Familiarity with current trends and best practices.

• Excellent communication skills and ability to work in a fast‑paced environment.

Nice to have
:

• Familiarity with Celery, Redis, React.

• Dev ops experience — we have automated pipelines that build ECS clusters.

• Familiarity with or an interest in improving developer tooling — we’re currently running a one‑command setup for a full‑blown local dev environment that mimics prod!

• Exposure to data science or data engineering.

Our stack

• Backend:

  • Django 5.x

  • Python 3.12

  • Celery

  • Redis

• Frontend:

  • React 18.x

• Infra (AWS):

  • Fargate

  • ECS

  • RDS (Postgres)

  • Clickhouse