Python Developer AI & ETL Engineer (LangChain, MongoDB)

Top 3 reasons to join us

• Attractive compensation package: Upto $2500+ Bonus
• Onsite opportunities in Germany
• 15 days Paid Leaves + 01 Birthday Leave per year

Job description

We are looking for a results-driven Python Developer specializing in building AI-powered automation workflows using LangChain. Strong proficiency in document/email processing, ETL pipelines, MongoDB, Chroma, and data manipulation with Pandas. Bonus expertise in Salesforce plugin development with Java, enabling seamless integration with CRM workflows. Ideal for transforming unstructured communication into structured, actionable insights.

Your Responsibilities:

• Email & Document Parsing:
  • Extract metadata, content, attachments from email servers or shared drives
  • Parse PDFs, Word docs, HTML, plain text using reliable libraries
• Case Generation Pipeline:
  • Transform raw unstructured inputs into structured, queryable "cases"
  • Use LLMs to classify, extract intent, and associate case metadata
• Data Hydration & Enrichment:
  • Query MongoDB and external APIs (e.g., Salesforce) to enhance data completeness
  • Update or create Salesforce records via plugin interfaces if needed
• AI Workflow Orchestration (LangChain):
  • Implement step-based chains to analyze case data
  • Integrate Chroma vector searches for semantic enrichment
  • Use LLM reasoning to output decisions/actions
• ETL Management:
  • Build robust pipelines with retry logic, logging, and monitoring
  • Optimize large-scale data transformations using Pandas
  • Handle schema changes and maintain backward compatibility

Bonus: Salesforce Plugin Development

• Java experience with Salesforce plugin/API development
• Able to push/pull data to/from Salesforce for contextual case enrichment
• Can work with Salesforce Events, Flows, or REST APIs from both Java and Python layers

Your skills and experience

Your required Technical Skills and Experiences:

Languages & Frameworks

• Python (Advanced – automation, AI pipelines, API development)
• Java (for Salesforce plugin/custom integration)
• FastAPI / Flask (API layer)
• Pandas (ETL & data wrangling)

LLMs & AI Tools

• LangChain (Chains, agents, tools, retrievers, RAG architecture)
• OpenAI / Anthropic LLMs
• Prompt Engineering
• Chroma (Vector store – semantic search, metadata filtering)
• Named Entity Recognition (NER), Summarization, Classification

Data & Storage

• MongoDB (primary data store – structured/unstructured data, case management)
• Chroma (vector search – for semantic document lookup)
• Salesforce (data sync & plugin development via Java-based integrations)
• JSON, YAML, and nested data structure manipulation

ETL & Data Pipelines

• End-to-end pipeline building: extraction, transformation, and load
• PDF, email, and file ingestion
• Data hydration: merging case data with internal DBs, CRM, and APIs
• Schedule and trigger-based processing

Why you'll love working here

• Attractive salary: up to $2500 depends on your experiences and skills
• 13th-month Salary bonus with Annual Salary Review or on excellent performance
• Government Social Insurance, Unemployment Insurance for 100% Salary
• Health Insurance and Annual Health Check-up
• Full set of Working Devices Provided
• Birthday gift, Team Bonding Party, Company Trip and Events
• A possibility to attend on-sites and conferences in Germany, Europe.
• Annual leaves: 15 days off and 01 Birthday Leave per year (exclusive of public holidays)
• An open and dynamic working environment with opportunity to be part of innovation team and global projects
• Nice office with free snacks and drinks in the centre of Hanoi at  No. 1 Thai Ha St.
• Working Time: Monday to Friday (from 9AM to 12AM and 1PM to 6PM)