Senior Backend Engineer

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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

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

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.

• 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

• 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

• 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

• 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.

• Seniority level
  
  Mid-Senior level

• Employment type
  
  Full-time

• Industries Banking

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