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.