Senior Backend Engineer

Newfold Digital Inc.; Brasil; Remote; BRL 180,000 - 300,000; Full time

Benefits offered by this job

Meal Voucher

Health and dental insurance

Well-being program

Pet health insurance

Job summary

Bluehost, part of Newfold Digital, is seeking a Senior Backend Engineer to design and scale async Python APIs and AI-enabled backend systems. You will implement multi-agent workflows, integrate multiple LLM providers, and build robust RAG pipelines with vector stores like pgvector or Chroma.

Responsibilities include data model design, ORM migrations, and end-to-end CI/CD ownership. We expect strong Python expertise, experience with async architectures, and practical knowledge of AI-augmented

Qualifications

• 5+ years building production backend systems in Python with async I/O experience.
• Experience designing and scaling REST/async APIs with clean service architecture.
• Practical experience integrating LLM APIs and building AI-ready backend.
• Real experience with vector databases and RAG architectures.

Responsibilities

• Design and scale async REST/WebSocket APIs in Python.
• Implement multi-agent workflows to route work among specialized LLM agents.
• Integrate multiple LLM providers behind a provider-agnostic layer.
• Build and maintain RAG pipelines against vector stores (pgvector/Chroma).
• Design data models with ORM and migrations to support AI features.
• Instrument services with logs, tracing, and metrics; maintain production quality.

Skills

Async I/O experience

Python backend

REST APIs design

Dependency injection

LLM integration

Vector databases

CI/CD ownership

Tools

pgvector

Chroma

Semantic Kernel

LangChain

Job description

## Senior Backend EngineerApply: Brazil - Remote: Full time: Posted Today: R15211**Job Description****Who We Are** At Bluehost, we believe all small businesses deserve the opportunity to succeed online. Our mission is to give small businesses the confidence to think big. We're the all-in-one platform for small businesses to grow online with powerful simplicity, premium performance, smart tools and human support. This role is a part of Bluehost's innovation team, the group building the AI-native backbone of our platform while the rest of the business scales around us. You'll design async, production-grade backend systems that treat AI as a first-class citizen: multi-agent orchestration, retrieval-augmented generation, and provider-agnostic LLM integration, all woven into products millions of small businesses depend on. We want a true go-getter who can take an idea from whiteboard to production without waiting to be told how. **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.** 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.** We offer a **Meal Voucher or Food Voucher** worth **R$44.55 per working day**. Comprehensive **health and dental insurance**, with no employee co-pay.* **Well-being program** including **Gympass, online meditation, and telemedicine**.* Do you have a dog, cat, rabbit, hamster, goat, turtle, or even a mini dragon? We offer access to a **pet health insurance partnership**.* **Educational platform**: pursue undergraduate and graduate degrees, language courses, and much more through **100+ educational institutions** at highly affordable rates.* **Life insurance** coverage.* **Free website hosting**.* **Where can we take you?** Mentorship, new challenges, and real career growth. Unfold new possibilities #OTOD!