Santhosh Kumar S
Software Engineer I (Backend)
Passionate backend engineer specializing in building scalable modular monoliths, cloud-native applications, and high-performance APIs. Expert in FastAPI, Next.js, AWS, and modern DevOps practices.
Products
RateMate
Australian Contractor Rate Calculator
Calculate daily and hourly billing rates with GST and superannuation adjustments for Australian contractors
GST ToggleSuperannuation (12%)Customizable Work Days
Next.jsReactTailwind CSS
Visit InvoiceFlow
Smart Invoice Generator
Create professional invoices with automatic calculations, multiple templates, and PDF export
Multiple TemplatesAuto CalculationsPDF Export
Next.jsReactPDF Generation
Coming SoonPDFKit
PDF Toolkit
Merge, split, compress, and convert PDF files with a simple drag-and-drop interface
Merge PDFsSplit PagesCompress Files
Next.jsReactPDF.js
Coming SoonProfessional Experience
Software Engineer I
MindGryd Software Private Limited
Jun 2025 - Present•Current Position
- Transitioned with the core engineering team from HiFresh Agro to MindGryd (Strategic Spinoff); retained by leadership for continued backend excellence
- Designed and deployed high-performance backend services using FastAPI with Swagger (OpenAPI) for comprehensive API documentation
- Provisioned and configured 3 AWS EC2 instances to set up self-hosted Kubernetes cluster (1 master, 2 worker nodes) for production workloads
- Built advanced AI agents using LangGraph with multi-agent orchestration and complex workflow automation, reducing manual operational effort by 40%
- Developed sophisticated workflow automation systems using n8n for business process optimization and integration management
- Implemented vector database solutions with Pinecone for AI-powered search, RAG applications, and semantic data retrieval
- Deployed containerized applications to AWS EKS and self-hosted K8s cluster with Docker and Docker Compose orchestration
- Configured self-hosted ephemeral GitHub runners for company CI/CD pipelines, improving build performance and security
- Leveraged AWS Bedrock services (Nova Canvas, Nova Reels) for automated image and video generation capabilities
- Implemented robust authentication using Google OAuth 2.0 and JWT with Strategy Pattern for dynamic flow selection
FastAPIPythonLangGraphn8nPineconeKubernetesAWS EC2AWS EKSDockerDocker ComposeGitLab CI/CDGitHub ActionsAWS S3AWS BedrockOAuth 2.0
Software Engineer
HiFresh Agro Private Limited
Nov 2024 - May 2025•Full-time | Software Engineer Intern
- Implemented automated backup solution with Node.js using daily Cron jobs for MongoDB data recovery
- Developed Role-Based Access Control (RBAC) with JWT authentication in Next.js for secure API access
- Built distributed, queue-based processing system using Node.js and Docker for improved throughput
- Integrated processing results into Metabase for real-time analytics and business intelligence
- Optimized database operations and implemented automated data retention policies
Node.jsNext.jsMongoDBDockerJWTMetabaseCron Jobs
Open Source Contributions
PhenEx
Bayer-Group/PhenExHealthcare analytics platform by Bayer Group for phenotype extraction and analysis
PythonHealthcareAnalytics
View Fork n8n-nodes-mongo-oid
hifreshagro/n8n-nodes-mongo-oidCustom n8n node for MongoDB ObjectId operations in workflow automation
TypeScriptn8nMongoDB
View Fork Barbell
crummyh/BarbellPython-based fitness tracking and workout management tool
PythonFitnessCLI
View Fork Technical Skills
Programming Languages
PythonJavaScriptSQL
Frameworks
FastAPINext.js
Cloud & DevOps
AWS EC2AWS EKSKubernetesDockerDocker ComposeGitLab CI/CDGitHub Actions
AI & Automation
LangGraphn8nPineconeAWS BedrockMulti-Agent SystemsRAG Applications
Databases & Tools
MongoDBPostgreSQLAWS S3MetabaseGitVector Databases
Let's Build Something Amazing
Ready to contribute to your next backend project. Let's discuss how I can help build scalable, efficient solutions for your team.
Tiruchirappalli, Tamil Nadu, India