Senior AI Back-End Engineer

Whatyoulldo & howyoullmake your mark

• Design & scaleasync REST/WebSocket APIs withPython 3.11+ +FastAPI, using dependency-injection, type hints, and clean vertical-slice architecture.

• Implement multi-agent workflows withSemantic Kernel(handoff, sequential, concurrent) to route traffic amongspecialisedLLM agents.

• Integrate LLM providers (OpenAI GPT-4.1/mini, Google Gemini 2.5 Flash) behind a provider-agnostic layer for A/B and cost-aware routing.

• DeliverRetrieval-Augmented Generationwith vector stores such asAzure AI Search,pgvector, or Chroma.

• Expose tool-using agents viaOpenAI Assistants (Code-Interpreter)for data-analysis / file-manipulation tasks.

• Evolve schemas withSQLModel/SQLAlchemy2&Alembic; tune Postgres forhigh-concurrencyasync access.

• Maintain robustCI/CD (Bitbucket Jenkins)that lint, type-check, test, package (Docker), and deploy.

• Instrument services withstructlogJSON logs,OpenTelemetrytraces, and cost/latency metrics; hold p95 < 100ms.

• ChampionAI-assisted development(GitHub Copilot, Cursor) and share pragmatic problem-solving practices with the team.

Who you are & whatyoullneed to succeed.

• 5 + yrs building production APIs in Python; 2 + yrs withFastAPI(or similar async stack).

• Deep knowledge of async I/O,Pydanticv2, DI, and observability.

• Hands-on withSemantic Kernelor comparable agent frameworks.

• Practical RAG implementations usingAzure AI Search,pgvector, or Chroma.

• Strong Postgres skills, includingSQLModel/SQLAlchemy2and Alembic migrations.

• Proven integrationsor Side Projectswith LLM APIs (OpenAI, Gemini) and structured-output design.

• Dependency management viaPoetryand virtual-env isolation.

• End-to-end CI/CD ownership (build 1 scan 1 test 1 deploy).

• Excellent analytical and problem-solving ability.

• Remote work readinesswith daily overlap of at least09:00 1 13:00 EST.

Nice to have

• Event/message queues (RabbitMQ, Azure Service Bus, Kafka).

• Observability stacks (Grafana,LangFuse) for LLM cost governance.

Join us to build the agent-powered backbone of our AI platformrobust, model-agnostic, and ready for millions of users.

Whyyoullloveus.

• Work-life balance. Our work is thrilling and meaningful, but we know balance is key to living well.

• We celebrate one anothers differences.Wereproud 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 onimportant issuesand provide learning and development opportunities for all employees. We have 20 + affinity groups where you can network and connect withNewfoldersglobally.

• We care about you.We are a family, and we care about you and your familys physical and mental health by providing competitive HMO benefits 1 175k MBL with one free dependent upon one year of service! We also give out Punctuality Bonus, Generous Vacation policy, and much more!

• Where can we take you?Werefans of helping our employees learndifferent aspectsof the business,bechallenged with new tasks,bementored, andgrowtheir careers. Unfold new possibilities with #teamnewfold!

The target compensation range for this position is $90,000 to $150,000 annually. Individual salaries are determined by various factors including, but not limited to: candidates qualifications, such as skills, education, and experience, as well as internal equity and market conditions.

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