Santhosh Kumar S
Software Engineer
Software engineer who builds products end-to-end. From APIs to interfaces, cloud infrastructure to user experience. Expert in FastAPI, Next.js, AWS, and modern DevOps practices.
Products
Rate Calculator
Australian Contractor Rates
Calculate daily and hourly billing rates with GST and superannuation for Australian contractors
GST ToggleSuperannuation (12%)Tax Brackets
Vanilla JSTailwind CSS
Visit Salary Calculator
India CTC to In-Hand
Calculate take-home salary from CTC with old vs new tax regime comparison for Indian employees
Old vs New RegimeHRA ExemptionTax Breakdown
Vanilla JSTailwind CSS
Visit Invoice Generator
Create PDF Invoices
Create professional invoices with line items, tax calculations, and instant PDF download
Line ItemsTax CalculationPDF Export
Vanilla JSTailwind CSSjsPDF
Visit PDF Tools
Merge, Split, Compress
Merge multiple PDFs, split pages, compress file size, and convert images to PDF
Merge PDFsSplit PagesCompress
Vanilla JSTailwind CSSpdf-lib
Visit JSON Formatter
Format & Validate JSON
Format, minify, and validate JSON with stats like key count, depth, and file size
BeautifyMinifyValidate
Vanilla JSTailwind CSS
Visit QR Generator
Create QR Codes
Generate QR codes from text or URLs and download as PNG in multiple sizes
Text/URL InputMultiple SizesPNG Download
Vanilla JSTailwind CSSQRious
Visit Color Palette
Generate Color Schemes
Generate random color palettes instantly. Lock colors you like and regenerate the rest
Random GenerationLock ColorsCopy HEX/RGB
Vanilla JSTailwind CSS
Visit Markdown Editor
Write & Preview Markdown
Distraction-free markdown editor with live preview, copy as HTML, and file download
Live PreviewCopy HTMLDownload .md
Vanilla JSTailwind CSSmarked.js
Visit Professional 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 pricing-app
sernafernando/pricing-appE-commerce pricing management system with ERP sync, analytics, and multi-channel integration
PythonFastAPIAnalytics
View Fork Barbell
crummyh/BarbellPython-based fitness tracking and workout management tool
PythonFitnessCLI
View Fork Technical Skills
Programming Languages
PythonJavaScriptSQL
Frameworks
FastAPINext.jsTailwind CSS
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 build your next product. Let's discuss how I can help turn ideas into working software.
Tiruchirappalli, Tamil Nadu, India