Leading TechnicalExcellence
I'm Rajan Tandukar, a Tech Lead and Principal Engineer leading high-performing teams to design and deploy scalable, enterprise-grade architectures while mentoring engineers, driving technical excellence, and building intelligent AI-powered solutions with RAG and vector databases.
Technical & AI Leadership
Expertise in architecting scalable systems, leading engineering teams, mentoring talent, driving technical strategy, and building intelligent AI-powered solutions
System Architecture
Designing and architecting scalable microservices, APIs, and distributed systems with proper design patterns and best practices.
Team Leadership
Mentoring engineers, conducting code reviews, fostering engineering culture, and driving technical growth across teams.
Cloud & DevOps Strategy
Leading cloud architecture initiatives, implementing infrastructure as code, and establishing DevOps practices across teams.
Full Stack Engineering
Deep expertise across frontend and backend technologies, setting technical standards and best practices.
Technical Decision Making
Making informed technical decisions, evaluating technologies, and defining engineering roadmaps aligned with business goals.
Quality & Standards
Establishing coding standards, implementing quality assurance processes, and driving continuous improvement initiatives.
AI Engineering
Building intelligent systems with Python, LangChain, RAG, vector databases, agentic workflows, and LLM integration. Expert in tool calling, prompt engineering, model orchestration, and data science frameworks for enterprise applications.
Leading EngineeringInnovation
As a Tech Lead and Principal Engineer with 13+ years of experience, I lead high-performing engineering teams and architect scalable, enterprise-grade systems. I drive technical strategy, mentor talented engineers, and ensure architectural excellence across all initiatives.
My expertise spans cloud-native architectures, microservices, system design, team leadership, DevOps practices, and modern AI engineering. I specialize in building intelligent systems using RAG, vector databases, semantic search, and LLM integration to solve complex business problems.
I hold a BIT in Computing and Software Engineering from Islington College and stay at the forefront of emerging technologies and industry best practices through continuous learning and community involvement.
Architectural Initiatives
Key projects and systems I've led, architected, and delivered with high-impact results
E-Commerce Microservices Platform
Scalable microservices architecture for a high-traffic e-commerce platform with real-time inventory management and payment processing.
Tech Stack
Architecture
Key Features
- Real-time inventory tracking
- Distributed payment processing
- Auto-scaling infrastructure
Real-time Analytics API
High-performance analytics API processing millions of events per day with real-time dashboards and alerting system.
Tech Stack
Architecture
Key Features
- Real-time data processing
- Custom alerting rules
- Interactive dashboards
Multi-tenant SaaS Platform
Enterprise SaaS platform with multi-tenancy, role-based access control, and comprehensive audit logging.
Tech Stack
Architecture
Key Features
- Tenant isolation
- Real-time notifications
- Comprehensive auditing
AI-Powered Intelligent Document Processing
Enterprise document processing platform built with LangChain, leveraging RAG patterns, vector databases, and semantic search to extract, analyze, and classify documents with high accuracy using LLM integration.
Tech Stack
Architecture
Key Features
- LangChain-powered workflows
- Semantic document search
- LLM-powered extraction with tool calling
My Resume
Download my complete resume to learn more about my experience and qualifications
Download ResumeProfessional Skills and Expertise
Technical Leadership & Management
Tech Lead, Principal Engineer, Engineering Manager, Team Leadership, Mentoring, Code Review, Architecture Review, Technical Strategy, Roadmap Planning, Agile, Scrum
Backend Development
Python, FastAPI, Flask, ASP.NET Core, Node.js, Express.js, .NET 6, API Development, RESTful API, GraphQL, Microservices Architecture, Clean Architecture, Domain Driven Design, CQRS, Event Sourcing
Frontend Development
React, Next.js, Angular, TypeScript, HTML5, CSS3, Tailwind CSS, Material UI, Bootstrap, Responsive Design, UI/UX Implementation
Cloud & DevOps
AWS, Azure, Docker, Kubernetes, CI/CD Pipeline, GitHub Actions, Azure DevOps, Infrastructure as Code, Terraform, CloudWatch, Monitoring, Logging
Databases & Data Technologies
PostgreSQL, MongoDB, Redis, SQL Server, ElasticSearch, Pinecone, Weaviate, Milvus, Database Design, Query Optimization, Data Modeling, NoSQL
AI Engineering & Machine Learning
Python, LangChain, LangSmith, Large Language Models, RAG, Retrieval Augmented Generation, Vector Databases, Semantic Search, Hybrid Search, Embeddings, Prompt Engineering, Agentic Workflows, Tool Calling, Model Orchestration, OpenAI API, Claude API, Pinecone, Weaviate, Milvus, Pandas, NumPy, Scikit-learn, TensorFlow, PyTorch, Jupyter, FastAPI, NLP, Machine Learning, Data Pipeline, AI Integration
Architecture & System Design
System Architecture, Microservices, Scalability, High Availability, Performance Optimization, Distributed Systems, Multi-tenant Architecture, Security, Enterprise Software, SaaS
Years of Experience
13+ years of professional experience as a developer, engineer, and technical leader
Let's Work Together
Ready to build something amazing? I'm always interested in discussing new opportunities and challenging projects.
Get in Touch
I'm currently available for backend development projects, technical leadership roles, and consulting opportunities. Let's discuss how I can help bring your ideas to life.