AI Backend Developer (Python, Agile Scrum)

Top 3 reasons to join us

• Professional working environment
• Attractive salary, yearly bonus & awesome benefits
• Advanced learning & development opportunities

Job description

JOB DESCRIPTION

We are seeking an experienced AI Backend Developer with over 5 years of experience in designing, implementing, and optimizing AI-driven backend systems. The ideal candidate will have deep expertise in LangChain, RAG pipeline implementation, and search technologies (OpenSearch/Elasticsearch), along with experience in chatbot/playground development. Knowledge of AI agents, tools, and RAG optimization is a plus

KEY RESPONSIBILITIES: 

• Design and implement LangChain-based workflows for AI applications.
• Develop and optimize Retrieval-Augmented Generation (RAG) pipelines.
• Integrate OpenSearch/Elasticsearch for semantic/hybrid search.
• Build and maintain chatbot/playground environments (e.g., Streamlit, Gradio, custom UIs).
• Fine-tune vector search, hybrid search, and relevance ranking.
• Optimize indexing/query performance for low-latency AI responses.
• Work with embeddings (OpenAI, Hugging Face, or custom models).
• Develop scalable APIs (FastAPI, Flask, or similar).
• Collaborate on frontend-backend integration (Ember.js or other JavaScript frameworks).
• Use build tools (Ant, Maven, Gradle) for deployment automation.
• Ensure CI/CD pipelines are efficient and reliable.
• Work in Agile/Scrum environments, participating in sprints, standups, and retrospectives.
• Collaborate with frontend engineers, data scientists, and product teams.

Your skills and experience

BASIC QUALIFICATIONS

• 5+ years of backend development (Python preferred).
• Strong experience with LangChain for LLM orchestration.
• Hands-on experience with OpenSearch/Elasticsearch (indexing, querying, optimization).
• Proven track record in RAG pipeline implementation.
• Experience in developing chatbots or AI playgrounds (e.g., Gradio, Streamlit, custom UIs).
• Familiarity with LLM APIs (OpenAI, Anthropic, Mistral, etc.).
• Knowledge of AI agents & tools (AutoGPT, BabyAGI, multi-agent systems).
• Experience in RAG optimization & evaluation (metrics like precision@k, answer relevance).
• Familiarity with vector databases (Pinecone, Weaviate, Milvus).
• Understanding of NLP techniques (text processing, embeddings, fine-tuning). 
• Experience with both external and embedded databases 
• Understanding fundamental design principles behind a scalable application 
• Creating database schemas that represent and support business processes 
• Implementing automated testing platforms and unit tests 
• Proficient understanding of code versioning tools, such as Git 
• Ability to clearly communicate with both technical and non-technical team members 

Other Requirements:

• Experience with Agile Scrum 
• Experience with Ember or other JavaScript

Why you'll love working here

BENEFITS - What differentiates MEGAZONE from other software companies in Vietnam:

• The attractive salary (Negotiation)
• 2-month probation period with 100% salary.
• Full salary insurance coverage after the probation period.
• Participation in the PVI health insurance package, and annual health check-ups.
• 13th-month salary, birthday bonus, New Year bonus, Mid-Autumn Festival gifts, March 8th and October 20th gifts, etc.
• Performance evaluation and regular salary increases.
• Welfare for personal events, childbirth, and other benefits as per labor regulations and company welfare policies.
• Dynamic and youthful work environment conducive to personal growth and development