Backend Engineer (AI) HUSA Client

Company overview

Our partner is a U.S.-based pharmaceutical company with an annual revenue of $400 million, developing agentic AI solutions that enable machines to speak to data.

In Vietnam, the team focuses on building cutting-edge AI and data platforms that enhance traditional Business Intelligence (BI) systems with proactive, intelligent technology. Imagine a chat interface that not only retrieves data but also allows users to interact intuitively with structured information, receive in-depth analyses, and generate actionable business insights all powered by intelligent agents.

Job overview and responsibility

- Architect and Scale Core Systems: Lead the design, implementation, and optimization of highly scalable, fault-tolerant backend services and non-blocking APIs using Python (FastAPI) or Java (Vert.x, Quarkus). Ensure services handle high throughput with minimal latency.

- End-to-End Product Delivery: Drive the full lifecycle of product features from requirements gathering and prototyping through testing, deployment, and iteration working closely with product managers, UX designers, and DevOps.

- Champion Asynchronous Patterns: Build and maintain event-driven, asynchronous processing pipelines (e.g., message queues, pub/sub) to support real-time data ingestion, processing, and integrations.

- Performance & Reliability: Establish and enforce best practices for monitoring, observability, and automated testing. Identify bottlenecks and implement caching, connection pooling, backpressure, and rate-limiting strategies to sustain 99.9%+ uptime.

- Comprehensive Service Monitoring: Design, deploy, and maintain end-to-end observability solutions using Prometheus for metrics collection and Grafana for visualization and alerting.

- AI & RAG Applications: Architect Retrieval-Augmented Generation (RAG) solutions and intelligent agents that solve real-world problems integrating vector stores, LLM APIs (e.g., OpenAI), and custom prompting frameworks.

- Mentorship & Collaboration: Provide technical leadership and mentorship to mid-level engineers, foster a culture of code quality, and collaborate across cross-functional teams to drive continuous improvement.

Required skills and experiences

- 5-8+ years of software engineering experience, with a proven track record of building and operating production-grade, scalable applications.

- AI/ML Collaboration: Familiarity with embedding-based search, prompt engineering, chaining, and orchestration of multi-LLM workflows.

- Leadership & Communication: Excellent verbal and written English skills; demonstrated ability to influence technical direction and collaborate effectively across teams.

- Expertise in Python & FastAPI or Java (Vert.x, Quarkus): Deep familiarity with asynchronous programming (async/await in Python or non-blocking event loops in Java), concurrency models, and profiling/tuning of services.

- API Design Mastery: Hands-on experience building RESTful, GraphQL, or gRPC APIs that support high request volumes; strong understanding of HTTP/2, WebSockets, and protocol optimizations.

- Cloud & Infrastructure: Proficient with AWS, GCP, or Azure; containerization with Docker; orchestration using Kubernetes/Helm; Infrastructure-as-Code (Terraform, CloudFormation).

- Data Storage & Caching: Solid background in relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis, DynamoDB) databases; designing data schemas for performance and scalability.

- Asynchronous Ecosystems: Experience with message brokers (Kafka, RabbitMQ, AWS SQS), task queues (Celery, AWS Lambda) or Java equivalents, and stream-processing frameworks.

Preferred skills and experiences

- RAG & Agent Development: Practical experience implementing Retrieval-Augmented Generation pipelines, vector search (e.g., Pinecone, Weaviate), and building autonomous agents with LangChain or similar frameworks.

- Observability & Security: Strong grasp of logging, tracing (OpenTelemetry), metrics (Prometheus/Grafana), and security best practices (OAuth2, JWT, encryption).

Why Candidate should apply this position

- Attractive cash salary with upside potential from equity

- 13th month bonus

- Fast-moving product-culture

- Work in an AI first environment

Report to

Chief Digital Officer

Interview process

1 Screening Interview (Vietnamese), 1 Test, 1 Fit Interview with Chief Digital Officer (English)