Senior Backend Engineer

Get AI-powered advice on this job and more exclusive features. This range is provided by Oscar. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $120,000.00/yr - $180,000.00/yr 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 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. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Industries Banking Referrals increase your chances of interviewing at Oscar by 2x Get notified about new Back End Developer jobs in Austin, TX .

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