Senior AI-Driven Backend Engineer for Scalable APIs

WebHosting; United States; On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health benefits

HSA

Dental

Vision

401K matching

Life/AD&D/STD/LTD

Tuition Reimbursement

Pet Insurance

Generous PTO

Job summary

Webhosting is seeking a backend engineer to design and scale asynchronous REST and WebSocket APIs in Python, using FastAPI or similar frameworks. You will implement multi-agent workflows with LLMs and create a provider-agnostic layer for AI services.

You will also build RAG pipelines against vector stores and evolve ORM-based data models with migrations. You will own CI/CD, testing, and deployment, ensuring production performance and cost-aware routing.

Qualifications

• Proficient Python backend development.
• Experience with modern API frameworks (FastAPI or similar).
• Knowledge of async programming and DI patterns.

Responsibilities

• Design and scale async REST/WebSocket APIs in Python.
• Implement multi-agent workflows with LLMs.
• Build RAG pipelines using vector stores like pgvector/Chroma.

Skills

Python

FastAPI

Async APIs

Type hints

DI

ORM

Tools

pgvector

Chroma

SQLAlchemy

Job description

Job Description

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

Why You’ll Love Us

Work-life balance.Meaningful work, balanced by a culture that respects your time.

A culture of belonging.We celebrate what makes each of us different, with 20+ affinity groups connecting employees globally.

We care about you.Excellent Health, HSA, Dental, Vision, Matching 401K, Life/AD&D/STD/LTD, Tuition Reimbursement, Pet Insurance, and generous PTO.

Where can we take you?Mentorship, new challenges, and real career growth. Unfold new possibilities #OTOD!

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.