Senior Full Stack Engineer | AI · Python · Cloud
Aktualisiert am 06.03.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 10.02.2026
Verfügbar zu: 100%
davon vor Ort: 60%
Python FastAPI Application Architecture
AI Solution Architecture
Generative AI
LangChain
LangGraph
RAG
REST APIs
React
TypeScript
PostgreSQL
Neo4j
Vector Databases
Cloud Archiecture
AWS
Google Cloud Platform
Docker
Kubernetes
Microservices
CI/CD
enterprise applications
English
Fluent
German
A2 Certified ? B1 in progress

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

5 months
2025-10 - now

AI-powered Graph & RAG Platform

Solution Architect / Lead Developer Generative AI LangChain RAG ...
Solution Architect / Lead Developer
  • Designed and developed multiple open-source, AI-powered platforms focused on RAG and developer productivity
  • Built Smart Developer Assistant (SDA) using FastAPI, LangChain, Qdrant, and React to support code generation and documentation workflows
  • Implemented Dealflow Data Platform using Node.js, React, Neo4j, and LangChain for AI-assisted graph data modeling and natural language querying
  • Extended the architecture with NVIDIA-optimized components for GPU-accelerated inference and embedding workflows starting January
  • Designed modular, cloud-ready architectures with containerized deployment and clear separation of concerns
  • Authored technical documentation and maintained public repositories to support community usage and learning
LangChain Neo4j FastAPI NVIDIA AI Stack
Generative AI LangChain RAG Neo4j Vector Databases Cloud Architecture
Open Source Project
8 months
2025-07 - now

Dealflow Intelligence Platform

AI Platform Consultant
AI Platform Consultant
  • Smart Developer Assistant (SDA): Architected and deployed multi-agent AI system for automated code intelligence, refactoring, and DevOps artifact generation using LangChain, LangGraph, FastAPI, Qdrant, and React TypeScript. Implemented ingestion-to-deployment pipeline processing 50+ repositories with 90%+ accuracy in generating Docker, Kubernetes, and CI/CD templates. (GitHub: github. com/santoshnarayanan/sda)
  • Dealflow Intelligence Platform: Built hybrid Graph + Vector AI platform combining Neo4j (Cypher multi-hop queries) and Weaviate (semantic search) for natural-language startup/investor analytics. Designed multi-agent orchestration with Prometheus observability, achieving sub-200ms query latency across 10K+ entities with microservices architecture, Traefik routing, and Redis caching. (GitHub: github. com/santoshnarayanan/dealflow-data)
  • NVIDIA AI Platform: Designed enterprise-grade LLM and RAG platform architecture aligned with NVIDIA AI best practices, enabling scalable GPU-backed inference, clear control-plane separation, and cost-aware AI workload management. Implemented observability-first design with metrics for retrieval latency, inference performance, and agent execution paths to ensure reliability and operational efficiency. (GitHub: github. com/santoshnarayanan/nvidia)
Germany
9 months
2024-10 - 2025-06

AI-enabled Data Workflow Platform (Germany)

Full stack developer, Senior Fullstack Developer Python FastAPI React ...
Full stack developer, Senior Fullstack Developer

  • Designed and implemented Agentic AI workflows using LangChain and LangGraph to automate complex financial data-mapping processes across 10?20 client-specific workflows, reducing manual effort significantly
  • Built Retrieval-Augmented Generation (RAG) pipelines with LangChain and Pinecone to enable LLMdriven semantic search and rule-based data transformation for banking templates
  • Developed AI-assisted data ingestion pipelines capable of dynamically adapting to client-specific schemas, rules, and column structures, persisting changes automatically in the database
  • Implemented an Agentic AI-driven DevOps automation system that analyzed frontend/backend repositories (TypeScript, JavaScript, Angular) and auto-generated Docker Compose configurations, reducing setup time from days to minutes
  • Refactored backend services to FastAPI + SQLAlchemy, improving memory efficiency by 45%, and containerized full-stack services for production-ready CI/CD deployment
  • Designed deterministic agentic workflows with structured outputs, rule-based validation, and schema enforcement to evaluate correctness, prevent hallucinations, and ensure reliable execution across multi-step RAG and tool-using pipelines
  • Implemented multimodal agent pipelines integrating OpenAI Whisper for speech-to-text ingestion, enabling voice-driven inputs to be processed through LangChain-based RAG and multi-agent reasoning workflows

FastAPI React PostgreSQL
Python FastAPI React TypeScript REST APIs Application Architecture
Debitos Gmbh
Germany
1 year 8 months
2022-12 - 2024-07

Enterprise SaaS Platform Development (Germany)

Senior Software Developer, Senior Fullstack Developer Python React GraphQL ...
Senior Software Developer, Senior Fullstack Developer

  • Designed and implemented asynchronous processing pipelines using FastAPI with RabbitMQ and Celery, improving system scalability and reducing processing bottlenecks while increasing workflow throughput by ~35%
  • Implemented proactive monitoring and quality controls using Grafana dashboards and automated pytest suites, reducing production issues and improving system stability and mean-time-to-resolution
  • Built ReactJS components with AWS Cognito & S3, increasing engagement 15%
  • Optimized GraphQL with DataLoader, improving performance by 35%
  • Strengthened backend security and reliability by implementing JWT-based authentication, FastAPI middleware, and API hardening patterns, improving platform robustness and reducing operational issues in production environments

React FastAPI GraphQL AWS
Python React GraphQL Cloud Architecture Microservices CI/CD
Breakwater Solutions Germany GmbH
Germany
6 years 7 months
2016-02 - 2022-08

Enhanced React/Redux UI performance by 35%

Project Lead 
Project Lead 

  • Enhanced React/Redux UI performance by 35% via lazy loading and code-splitting
  • Built Django REST APIs with Redis caching, cutting response times 60%
  • Refactored PostgreSQL queries; reduced API latency from 5 mins to under 2 mins

Persistent Systems
India

Aus- und Weiterbildung

Aus- und Weiterbildung

3 years
2005-01 - 2007-12

Post Graduate

MCA, IGNOU , Delhi
MCA
IGNOU , Delhi
Software Engineering, Data Structures & Algorithms, Database Management Systems,
Object-Oriented Programming, Web Application Development, Distributed Systems,
Systems Analysis and Design

Position

Position

  • Senior IT Consultant
  • Senior Platform Engineer
  • AI Platform Engineer - Cloud, CI/CD, DevOps, Generative AI

Kompetenzen

Kompetenzen

Top-Skills

Python FastAPI Application Architecture AI Solution Architecture Generative AI LangChain LangGraph RAG REST APIs React TypeScript PostgreSQL Neo4j Vector Databases Cloud Archiecture AWS Google Cloud Platform Docker Kubernetes Microservices CI/CD enterprise applications

Aufgabenbereiche

Application Archiecture
System Design
Backend Development
Full Stack Development

Produkte / Standards / Erfahrungen / Methoden

REST APIS
Microservices
Cloud Archiecture
CI/CD
Agile / Scrum
Profile:

  • Senior AI Platform Engineer with 20+ years of experience designing and delivering scalable cloud-native and AI-powered systems across global environments. Specialized in production-grade LLM and RAG architectures using LangChain, LangGraph, FastAPI, and hybrid graph?vector retrieval (Neo4j, Pinecone, Weaviate, Qdrant).
  • Architect of multi-agent AI workflows, deterministic RAG pipelines with schema validation, and observability-first LLM platforms designed for reliability, cost control, and scalable deployment. Experienced across AWS, GCP, and Azure, with strong expertise in CI/CD, Kubernetes, and cloud-native deployment, along with applied knowledge of MLOps concepts using Vertex AI and SageMaker.
  • Combines deep backend engineering expertise with practical generative AI implementation to build secure, high-performance, and production-ready AI systems.


Technical Skills

Frontend:

  • ReactJS
  • Redux
  • JavaScript
  • Node.js (Express)
  • HTML
  • CSS
  • SCSS


UI Frameworks:

  • Material UI
  • Carbon Components
  • Ant Design
  • Tailwind CSS
  • Bootstrap


Backend & APIs:

  • Python
  • Django
  • Flask
  • FastAPI
  • DRF
  • GraphQL
  • Apollo
  • Postman
  • Swagger
  • SoapUI


Cloud/DevOps:

  • AWS
  • Azure
  • GCP Cloud Run
  • Docker
  • Kubernetes
  • Terraform
  • Git
  • SVN
  • TFS
  • CI/CD pipelines


AI/ML & Generative AI:

  • LangChain
  • LangGraph
  • RAG (Retrieval-Augmented Generation)
  • OpenAI API
  • TensorFlow.js
  • Vector Databases
  • Pandas
  • Neo4j Graph Workflows


Testing:

  • Pytest
  • PyUnit
  • Jest
  • Mocha/Chai
  • xUnit/NUnit


Monitoring:

  • Grafana
  • OpenTelemetry
  • DataDog


Professional background:

10/2024 ? 06/2025:
Place of Work: Germany
Role: Senior Fullstack Developer
Customer: Debitos


Tasks:

  • Architected multi-screen data workflow with Nextjs/ React/ TS, boosting mapping speed by 50%
  • Refactored backend into FastAPI + SQLAlchemy, reducing memory use by 45%
  • Integrated LangChain & LangGraph workflows with Pinecone vector DB to enable semiautomated data mapping and LLM-powered search
  • Built RAG-powered workflows integrating LangChain + Pinecone, enabling LLM-augmented data search
  • Containerized backend services (FastAPI/Node.js) and React/TypeScript frontend, aligning with production-ready architecture and CI/CD pipelines


12/2022 ? 07/2024:
Place of Work: Germany
Role: Senior Fullstack Developer
Customer: Breakwater Solutions


Tasks:

  • Built ReactJS components with AWS Cognito & S3, increasing engagement 15%
  • Optimized GraphQL with DataLoader, improving performance by 35%
  • Integrated RabbitMQ + FastAPI for async workflows; scaled submissions 35


02/2016 ? 08/2022:
Place of Work: India 
Role: Project Lead
Customer: Persistent Systems


Tasks:

  • Enhanced React/Redux UI performance by 35% via lazy loading and code-splitting
  • Built Django REST APIs with Redis caching, cutting response times 60%
  • Refactored PostgreSQL queries; reduced API latency from 5 mins to under 2 mins


10/2007 ? 01/2016:
Place of Work: India 
Role: Senior System Analyst 
Customer: Atos


Tasks:

  • Developed scalable Django/Flask APIs, boosting backend performance 30%
  • Migrated data pipelines to Azure Data Factory, reducing ETL time 40%
  • Deployed containerized services with Docker/Kubernetes for isolation


02/2007 ? 06/2007:
Place of Work: India 
Role: System Analyst 
Customer: Deloitte


03/2006 ? 02/2007:
Place of Work: India 
Role: Senior Software Engineer 
Customer: Praxis Interactive


12/2001 ? 11/2004:
Place of Work: India 
Role: Technical Consultant 
Customer: Systime Pvt Ltd


10/2000 ? 10/2001:
Place of Work: India 
Role: Junior Software Engineer
Customer: Silicon Interfaces

Programmiersprachen

Python
Javascript
SQL

Datenbanken

PostgreSQL
SQL Server
MongoDB
Neo4j
Redis
Qdrant
Pinecone
Weaviate
Azure SQL
Oracle 12g
MongoDB Atlas
Memcached
Neo4J Aura

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

5 months
2025-10 - now

AI-powered Graph & RAG Platform

Solution Architect / Lead Developer Generative AI LangChain RAG ...
Solution Architect / Lead Developer
  • Designed and developed multiple open-source, AI-powered platforms focused on RAG and developer productivity
  • Built Smart Developer Assistant (SDA) using FastAPI, LangChain, Qdrant, and React to support code generation and documentation workflows
  • Implemented Dealflow Data Platform using Node.js, React, Neo4j, and LangChain for AI-assisted graph data modeling and natural language querying
  • Extended the architecture with NVIDIA-optimized components for GPU-accelerated inference and embedding workflows starting January
  • Designed modular, cloud-ready architectures with containerized deployment and clear separation of concerns
  • Authored technical documentation and maintained public repositories to support community usage and learning
LangChain Neo4j FastAPI NVIDIA AI Stack
Generative AI LangChain RAG Neo4j Vector Databases Cloud Architecture
Open Source Project
8 months
2025-07 - now

Dealflow Intelligence Platform

AI Platform Consultant
AI Platform Consultant
  • Smart Developer Assistant (SDA): Architected and deployed multi-agent AI system for automated code intelligence, refactoring, and DevOps artifact generation using LangChain, LangGraph, FastAPI, Qdrant, and React TypeScript. Implemented ingestion-to-deployment pipeline processing 50+ repositories with 90%+ accuracy in generating Docker, Kubernetes, and CI/CD templates. (GitHub: github. com/santoshnarayanan/sda)
  • Dealflow Intelligence Platform: Built hybrid Graph + Vector AI platform combining Neo4j (Cypher multi-hop queries) and Weaviate (semantic search) for natural-language startup/investor analytics. Designed multi-agent orchestration with Prometheus observability, achieving sub-200ms query latency across 10K+ entities with microservices architecture, Traefik routing, and Redis caching. (GitHub: github. com/santoshnarayanan/dealflow-data)
  • NVIDIA AI Platform: Designed enterprise-grade LLM and RAG platform architecture aligned with NVIDIA AI best practices, enabling scalable GPU-backed inference, clear control-plane separation, and cost-aware AI workload management. Implemented observability-first design with metrics for retrieval latency, inference performance, and agent execution paths to ensure reliability and operational efficiency. (GitHub: github. com/santoshnarayanan/nvidia)
Germany
9 months
2024-10 - 2025-06

AI-enabled Data Workflow Platform (Germany)

Full stack developer, Senior Fullstack Developer Python FastAPI React ...
Full stack developer, Senior Fullstack Developer

  • Designed and implemented Agentic AI workflows using LangChain and LangGraph to automate complex financial data-mapping processes across 10?20 client-specific workflows, reducing manual effort significantly
  • Built Retrieval-Augmented Generation (RAG) pipelines with LangChain and Pinecone to enable LLMdriven semantic search and rule-based data transformation for banking templates
  • Developed AI-assisted data ingestion pipelines capable of dynamically adapting to client-specific schemas, rules, and column structures, persisting changes automatically in the database
  • Implemented an Agentic AI-driven DevOps automation system that analyzed frontend/backend repositories (TypeScript, JavaScript, Angular) and auto-generated Docker Compose configurations, reducing setup time from days to minutes
  • Refactored backend services to FastAPI + SQLAlchemy, improving memory efficiency by 45%, and containerized full-stack services for production-ready CI/CD deployment
  • Designed deterministic agentic workflows with structured outputs, rule-based validation, and schema enforcement to evaluate correctness, prevent hallucinations, and ensure reliable execution across multi-step RAG and tool-using pipelines
  • Implemented multimodal agent pipelines integrating OpenAI Whisper for speech-to-text ingestion, enabling voice-driven inputs to be processed through LangChain-based RAG and multi-agent reasoning workflows

FastAPI React PostgreSQL
Python FastAPI React TypeScript REST APIs Application Architecture
Debitos Gmbh
Germany
1 year 8 months
2022-12 - 2024-07

Enterprise SaaS Platform Development (Germany)

Senior Software Developer, Senior Fullstack Developer Python React GraphQL ...
Senior Software Developer, Senior Fullstack Developer

  • Designed and implemented asynchronous processing pipelines using FastAPI with RabbitMQ and Celery, improving system scalability and reducing processing bottlenecks while increasing workflow throughput by ~35%
  • Implemented proactive monitoring and quality controls using Grafana dashboards and automated pytest suites, reducing production issues and improving system stability and mean-time-to-resolution
  • Built ReactJS components with AWS Cognito & S3, increasing engagement 15%
  • Optimized GraphQL with DataLoader, improving performance by 35%
  • Strengthened backend security and reliability by implementing JWT-based authentication, FastAPI middleware, and API hardening patterns, improving platform robustness and reducing operational issues in production environments

React FastAPI GraphQL AWS
Python React GraphQL Cloud Architecture Microservices CI/CD
Breakwater Solutions Germany GmbH
Germany
6 years 7 months
2016-02 - 2022-08

Enhanced React/Redux UI performance by 35%

Project Lead 
Project Lead 

  • Enhanced React/Redux UI performance by 35% via lazy loading and code-splitting
  • Built Django REST APIs with Redis caching, cutting response times 60%
  • Refactored PostgreSQL queries; reduced API latency from 5 mins to under 2 mins

Persistent Systems
India

Aus- und Weiterbildung

Aus- und Weiterbildung

3 years
2005-01 - 2007-12

Post Graduate

MCA, IGNOU , Delhi
MCA
IGNOU , Delhi
Software Engineering, Data Structures & Algorithms, Database Management Systems,
Object-Oriented Programming, Web Application Development, Distributed Systems,
Systems Analysis and Design

Position

Position

  • Senior IT Consultant
  • Senior Platform Engineer
  • AI Platform Engineer - Cloud, CI/CD, DevOps, Generative AI

Kompetenzen

Kompetenzen

Top-Skills

Python FastAPI Application Architecture AI Solution Architecture Generative AI LangChain LangGraph RAG REST APIs React TypeScript PostgreSQL Neo4j Vector Databases Cloud Archiecture AWS Google Cloud Platform Docker Kubernetes Microservices CI/CD enterprise applications

Aufgabenbereiche

Application Archiecture
System Design
Backend Development
Full Stack Development

Produkte / Standards / Erfahrungen / Methoden

REST APIS
Microservices
Cloud Archiecture
CI/CD
Agile / Scrum
Profile:

  • Senior AI Platform Engineer with 20+ years of experience designing and delivering scalable cloud-native and AI-powered systems across global environments. Specialized in production-grade LLM and RAG architectures using LangChain, LangGraph, FastAPI, and hybrid graph?vector retrieval (Neo4j, Pinecone, Weaviate, Qdrant).
  • Architect of multi-agent AI workflows, deterministic RAG pipelines with schema validation, and observability-first LLM platforms designed for reliability, cost control, and scalable deployment. Experienced across AWS, GCP, and Azure, with strong expertise in CI/CD, Kubernetes, and cloud-native deployment, along with applied knowledge of MLOps concepts using Vertex AI and SageMaker.
  • Combines deep backend engineering expertise with practical generative AI implementation to build secure, high-performance, and production-ready AI systems.


Technical Skills

Frontend:

  • ReactJS
  • Redux
  • JavaScript
  • Node.js (Express)
  • HTML
  • CSS
  • SCSS


UI Frameworks:

  • Material UI
  • Carbon Components
  • Ant Design
  • Tailwind CSS
  • Bootstrap


Backend & APIs:

  • Python
  • Django
  • Flask
  • FastAPI
  • DRF
  • GraphQL
  • Apollo
  • Postman
  • Swagger
  • SoapUI


Cloud/DevOps:

  • AWS
  • Azure
  • GCP Cloud Run
  • Docker
  • Kubernetes
  • Terraform
  • Git
  • SVN
  • TFS
  • CI/CD pipelines


AI/ML & Generative AI:

  • LangChain
  • LangGraph
  • RAG (Retrieval-Augmented Generation)
  • OpenAI API
  • TensorFlow.js
  • Vector Databases
  • Pandas
  • Neo4j Graph Workflows


Testing:

  • Pytest
  • PyUnit
  • Jest
  • Mocha/Chai
  • xUnit/NUnit


Monitoring:

  • Grafana
  • OpenTelemetry
  • DataDog


Professional background:

10/2024 ? 06/2025:
Place of Work: Germany
Role: Senior Fullstack Developer
Customer: Debitos


Tasks:

  • Architected multi-screen data workflow with Nextjs/ React/ TS, boosting mapping speed by 50%
  • Refactored backend into FastAPI + SQLAlchemy, reducing memory use by 45%
  • Integrated LangChain & LangGraph workflows with Pinecone vector DB to enable semiautomated data mapping and LLM-powered search
  • Built RAG-powered workflows integrating LangChain + Pinecone, enabling LLM-augmented data search
  • Containerized backend services (FastAPI/Node.js) and React/TypeScript frontend, aligning with production-ready architecture and CI/CD pipelines


12/2022 ? 07/2024:
Place of Work: Germany
Role: Senior Fullstack Developer
Customer: Breakwater Solutions


Tasks:

  • Built ReactJS components with AWS Cognito & S3, increasing engagement 15%
  • Optimized GraphQL with DataLoader, improving performance by 35%
  • Integrated RabbitMQ + FastAPI for async workflows; scaled submissions 35


02/2016 ? 08/2022:
Place of Work: India 
Role: Project Lead
Customer: Persistent Systems


Tasks:

  • Enhanced React/Redux UI performance by 35% via lazy loading and code-splitting
  • Built Django REST APIs with Redis caching, cutting response times 60%
  • Refactored PostgreSQL queries; reduced API latency from 5 mins to under 2 mins


10/2007 ? 01/2016:
Place of Work: India 
Role: Senior System Analyst 
Customer: Atos


Tasks:

  • Developed scalable Django/Flask APIs, boosting backend performance 30%
  • Migrated data pipelines to Azure Data Factory, reducing ETL time 40%
  • Deployed containerized services with Docker/Kubernetes for isolation


02/2007 ? 06/2007:
Place of Work: India 
Role: System Analyst 
Customer: Deloitte


03/2006 ? 02/2007:
Place of Work: India 
Role: Senior Software Engineer 
Customer: Praxis Interactive


12/2001 ? 11/2004:
Place of Work: India 
Role: Technical Consultant 
Customer: Systime Pvt Ltd


10/2000 ? 10/2001:
Place of Work: India 
Role: Junior Software Engineer
Customer: Silicon Interfaces

Programmiersprachen

Python
Javascript
SQL

Datenbanken

PostgreSQL
SQL Server
MongoDB
Neo4j
Redis
Qdrant
Pinecone
Weaviate
Azure SQL
Oracle 12g
MongoDB Atlas
Memcached
Neo4J Aura

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