Senior Backend Engineer

What You'll Do & How You'll Make Your Mark

• Design and scale async REST/WebSocket APIs in Python (FastAPI or similar), using dependency injection, type hints, and clean, vertical-slice architecture
• Implement multi-agent workflows (sequential, concurrent, and handoff patterns) to route work among specialized LLM agents
• Integrate multiple LLM providers behind a provider-agnostic layer, enabling A/B testing and cost-aware routing rather than hard-coding a single vendor
• Build and maintain Retrieval-Augmented Generation (RAG) pipelines against vector stores such as pgvector, Chroma, or a managed vector search service
• Design schemas and evolve data models (SQLAlchemy/SQLModel-style ORM plus migrations) that support both traditional application logic and AI-driven features
• Instrument services with structured logs, distributed tracing, and cost/latency metrics, holding a real bar for p95 response time under production load
• Maintain end-to-end CI/CD ownership, lint, type-check, test, package, and deploy, so releases are boring and safe
• Champion AI across the delivery lifecycle, not just code generation, and set the guardrails the team works inside: how generated code gets reviewed, how provenance and licensing are checked, and what customer data may enter a prompt
• Move ideas from concept to production fast, with real ownership over architecture and outcomes, not just tickets

Who You Are & What You'll Need to Succeed

• 5+ years building production backend systems in Python, with real async I/O experience
• Hands-on experience designing and scaling REST or async APIs, including dependency injection and clean service architecture
• Practical experience integrating LLM APIs (OpenAI, Gemini, or similar) and building AI-readiness into backend systems from the ground up
• Real experience with vector databases and RAG-style retrieval architectures, not just reading about them
• Strong relational database skills: schema design, query optimization, and migration discipline
• AI-augmented delivery: you use AI across the delivery lifecycle, not just code generation, and can say which models suit which problems and where you don't use them. You review AI-generated code knowing its failure modes, and you have set the guardrails others work inside - review expectations for generated code, provenance and licensing checks, and clear boundaries for what customer data enters a prompt and what a security or compliance review will ask for.
• End-to-end CI/CD ownership, from build and test through packaging and deployment
• A self-starting, go-getter mindset: comfortable with ambiguity, fast iteration, and owning a problem until it's actually solved
• Bonus: experience with multi-agent orchestration frameworks (Semantic Kernel, LangChain, or similar) and LLM cost/observability tooling

Why you'll love us.

• Work-life balance. Our work is thrilling and meaningful, but we know balance is key to living well.
• We celebrate one another's differences. We're proud of our culture of diversity and inclusion. We foster a culture of belonging. Our company and customers benefit when employees bring their authentic selves to work. We have programs that bring us together on important issues and provide learning and development opportunities for all employees. We have 20 + affinity groups where you can network and connect with employees globally.
• We care about you. We provide excellent Health Insurance options to fit you, HSA, Medical, Dental, Vision, Matching 401K, Life/AD&D/STD/LTD, Tuition Reimbursement, Pet Insurance, Generous vacation policy, and much more!
• Where can we take you? We're fans of helping our employees learn different aspects of the business, be challenged with new tasks, be mentored, and grow their careers. Unfold new possibilities with Bluehost #OTOD!

• #LI-SM1 #LI-Remote #Bluehost
• Employment with Newfold Digital is at-will and nothing in this Job Description should be interpreted or construed to alter the at-will employment relationship.

• This Job Description includes the essential job functions required to perform the job described above, as well as additional duties and responsibilities.
• This Job Description is not an exhaustive list of all functions that the employee performing this job may be required to perform.
• The Company reserves the right to revise the Job Description at any time, and to require the employee to perform functions in addition to those listed above.