Senior Backend Engineer Job at Oscar, Austin, TX

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  • Oscar
  • Austin, TX

Job Description

Job Title: Senior Backend Engineer - Python / AI / LLMs

Location: Remote (U.S. preferred)

Employment Type: Full-time

Salary: $120,000 - $180,000 + equity

Benefits: Competitive healthcare, flexible PTO, remote-first culture, home office stipend, wellness allowance, learning & development budget

About Us

We're a fast-moving startup on a mission to build AI-powered tools that make complex work simple, faster, and more intelligent. We leverage cutting-edge large language models (LLMs) to solve real problems across industries. Our team is small, senior, and passionate about what we build-every line of code makes a visible impact.

We're looking for a Senior Backend Engineer to join us in scaling the backend infrastructure that powers our AI systems.

What You'll Do

  • Design, build, and maintain backend services and APIs using Python (FastAPI, Flask, or Django)

  • Integrate and serve LLMs (e.g., OpenAI, Anthropic, Hugging Face, or open-source models) in production

  • Collaborate with ML engineers and product teams to deliver intelligent, scalable features

  • Build and optimize data pipelines for inference, prompt processing, and model fine-tuning

  • Architect systems that balance performance, security, and maintainability

  • Own projects end-to-end-from architecture and implementation to testing and monitoring

What We're Looking For

  • 5+ years of backend software development experience

  • Strong proficiency with Python and cloud infrastructure (AWS, GCP, or similar)

  • Experience deploying and working with LLMs in real-world products

  • Deep understanding of RESTful APIs, asynchronous programming, and containerized services (Docker, Kubernetes)

  • Familiarity with data pipeline tools and task queues (Airflow, Celery, etc.)

  • Product mindset-you think beyond code and care about usability, performance, and impact

Bonus Skills (Not Required but Nice to Have)

  • Experience with FastAPI

  • Familiarity with vector databases (Pinecone, Weaviate, FAISS)

  • Prompt engineering or fine-tuning experience with LLMs

  • Background in NLP, search, or applied ML

  • Experience building dev tools, SaaS, or productivity platforms

Why You'll Love Working Here

  • 💰 Competitive salary ($120K-$180K) + meaningful equity

  • 🏡 Fully remote, flexible work environment

  • 🏥 Comprehensive health, dental, and vision insurance

  • 🧘 Wellness, L&D, and home office stipends

  • 🧠 Work on cutting-edge AI systems that ship to real users

  • 👥 Smart, low-ego team that values impact over bureaucracy

Oscar Associates Limited (US) is acting as an Employment Agency in relation to this vacancy.

Job Tags

Full time, Home office, Flexible hours,

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