Skip to content
View suriya4code's full-sized avatar
🎯
Focusing
🎯
Focusing
15 followers · 39 following

Achievements

Achievement: Pull Sharkx2Achievement: YOLOAchievement: Arctic Code Vault Contributor

Achievements

Achievement: Pull Sharkx2Achievement: YOLOAchievement: Arctic Code Vault Contributor

Block or report suriya4code

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Content in all repositories owned by your account will be closed.
Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. This note will only be visible to you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse
suriya4code/README.md
Blueprint title sheet: Suriyaprakash Palanisamy, Senior Software Engineer. A meshing gear train, a nod to his mechanical engineering degree, drives a lantern wheel whose pins are graph nodes. An encoder turns the motion into a signal that flows through a node graph to FastAPI, AWS EKS/ECS and ML forecasting.

Suriyaprakash Palanisamy · Senior Software Engineer
Backend · Cloud · ML platforms · AI-driven development
10+ years across the full SDLC. Now building FastAPI microservices on AWS EKS/ECS that serve ML forecasting models at Freddie Mac (McLean, VA). Mechanical engineer by degree: from gears to graphs.

LinkedIn · Stack Overflow · Docker Hub · suriya4code@gmail.com


Who I am: 10+ years across the full SDLC; a platform of 50+ AWS microservices he contributed to; a 3,000-line Python backend refactored to about 1,000 lines with 20% better performance; PyTest coverage above 85% on new code; five domains: finance, healthcare, retail, pharma and insurance.
Tech stack as a bill of materials. Languages: Python, C#/.NET, JavaScript (primary), TypeScript, Swift, Java, Bash, SQL. Backend: FastAPI, Flask/Flask-RESTX, .NET Web API/Core (primary), Node/Express, Django. Frontend: React, Angular (primary), Vue, Redux, SwiftUI. AI: Claude Code, MCP, Copilot, local RAG, Tesseract OCR. Data: MS SQL Server, MongoDB, PostgreSQL, Oracle, Redshift, DynamoDB, Tableau, pandas/NumPy. DevOps: GitHub Actions, Docker, Kubernetes, Jenkins. Cloud: AWS (primary) incl. Lambda, Step Functions, DynamoDB, EventBridge, S3, Glue/Spark, EKS/ECS; Azure; Heroku. Testing: PyTest (primary), Playwright BDD, Vitest/RTL, XCTest, TDD. Observability: Prometheus, Grafana, Loki, CloudWatch, Azure App Insights.

ThumbStall, anti-doomscrolling app for Android, as a mechanism drawing: a thumb doomscrolls an endless feed while a feed drum spins; the pure-Kotlin rules engine trips, a stall pawl drops into the drum and the feed brakes to a stop. A breathing pause asks Still want to scroll? and counts down from 8; the 5, 10 and 15 minute session-budget chips unlock at zero; the thumb taps Close and the sheet stamps STALLED. Repeat opens within an hour wait 8, 13, 18, 23, 28 and a 30 second cap. INTERNET is struck through in the manifest: never requested. 35 core unit tests, GitHub Actions CI, Room.

ThumbStall · Kotlin · Jetpack Compose · Room · Android 8+ · GPL-3.0 · v0.1.1 · website · APK · breathing pause, escalating delays, session budget, costly override, no INTERNET permission


PangoLock, zero-knowledge folder vault for macOS, as an exploded isometric drawing: password, PBKDF2-HMAC-SHA256 with 210,000 iterations, master key with zero-knowledge verifier, HKDF-SHA256 per-item key, AES-256-GCM, atomic write of a .plock file, decrypt-and-compare, original removed, vault locked. 87 XCTest tests, CI on macOS, written threat model.

PangoLock · Swift / SwiftUI · macOS 13+ · MIT · v0.2.1 (pre-1.0) · verify-before-delete, atomic writes, crash-window tests, recovery key, portable lockers, encrypted sharing


RAG PDF Genie: ask a 115-page IRS PDF questions with a fully local LLM. The PDF is chunked, embedded with nomic-embed-text and stored in ChromaDB; rewritten queries (multi-query retriever) retrieve context; llama3.2 in Ollama writes an answer grounded only in that context. No API keys; the document never leaves the machine.

RAG PDF Genie · Python · LangChain · Ollama (llama3.2 + nomic-embed-text) · ChromaDB · Streamlit · multi-query retriever, grounded prompt


OCR trilogy: one Tesseract engine, three deployments. FastAPI on Heroku (2020), Flask-RESTX on Docker Hub (2021), Flask web UI with Heroku and Azure CD (2022). Express observability lab: an Express CRUD API instrumented with a prom-client request counter and latency histogram by method, route and status, plus winston-loki logs; Prometheus, Grafana and Loki run from Docker Compose. Dashboard drawing is illustrative.

OCR trilogy: tesseract-ocr (2020) → tesseract-flask (2021) → tesseract-pillow (2022) · Observability: express_js_prometheus


Containers and Kubernetes: a Flask API running as five replica pods behind a LoadBalancer Service on Minikube, with images published to Docker Hub (suriya4code/python-flask-microservice and suriya4code/flask-ocr). The same pattern as EKS and ECS at work.

python-microservice · Docker Hub: python-flask-microservice · flask-ocr


Repo constellation: smaller repositories grouped into five themes: FastAPI patterns, Frontend and 3D, Containers, DSA galaxy and Tools. FastAPI patterns fastapi_practices · fastapi_sql_aws_base
Frontend & 3D Babylon_Vue · react-basics-rejuvenation · AngularInMemoryCompanyAdmin
Containers flask_mongo_dockerized · heroku_deploy_flask
DSA galaxy dsa_algo · blind_leetcode_python · Tools github-stats
Career as a revision history, latest first. Rev J, Jul 2026 to now: Freddie Mac, FastAPI microservices on AWS EKS/ECS serving ML forecasting models. Rev H, May 2025 to Jul 2026: Capital One, platform of 50+ AWS microservices and an event-driven serverless pipeline. Rev G, Jan 2023 to May 2025: Freddie Mac, led the backend team. Rev F, Apr 2022 to Jan 2023: Agero, FastAPI on AWS Lambda from scratch. Rev E, May 2019 to Apr 2022: Humana, led the backend agile team, Tesseract OCR services. Rev D, Jun 2018 to May 2019: McKesson. Rev C, Sep 2017 to May 2018: Woolworths, Sydney. Rev B, Jan 2016 to Aug 2017: CVS Health, led API development. Rev A, 2015: BE Mechanical Engineering, Anna University.
AI-driven development: Claude Code runs a plan, code, test, review loop, connected over MCP to the codebase, tools and data, with Copilot in the editor, and tests and human review in the loop. Certifications: Claude Code in Action, Introduction to Model Context Protocol and Claude 101 (Anthropic, Aug 2026); AZ-204 Azure Developer Associate, AI-900 and AZ-900 (Microsoft).
Approval block signed by Suriyaprakash Palanisamy and stamped APPROVED.

LinkedIn: in/suriyaprakashp Stack Overflow: users/10440572 Docker Hub: u/suriya4code Email: suriya4code@gmail.com

Plain-text version (the whole drawing set, for screen readers and quick scanning)

Suriyaprakash Palanisamy

Senior Software Engineer · Backend · Cloud · ML platforms · AI-driven development · McLean, VA

Now: senior backend engineer on an ML forecasting platform at Freddie Mac (since Jul 2026), building FastAPI microservices on AWS EKS/ECS that serve machine-learning models for large-scale forecasting.

Signature numbers

  • 10+ years across the full software development life cycle
  • Contributed to a platform of 50+ AWS microservices
  • Refactored a >3,000-line Python backend to ~1,000 lines with OOP, +20% performance
  • PyTest coverage kept above 85% for all new code
  • 5 domains: finance, healthcare, retail, pharma, insurance
  • Led backend teams (Freddie Mac 2023–25, Humana 2019–22) and led API development at CVS Health

Experience

When Where Domain Highlights
Jul 2026 – now Freddie Mac Finance · ML forecasting Rejoined; FastAPI microservices on AWS EKS/ECS serving ML forecasting models
May 2025 – Jul 2026 Capital One Finance · card portfolio decisioning 50+ AWS microservice platform; event-driven serverless pipeline (EventBridge → Lambda → DynamoDB Streams → Step Functions → Glue/Spark); React/TS + Python; Vitest/RTL, Playwright BDD, feature-flagged rollouts
Jan 2023 – May 2025 Freddie Mac Finance · ML forecasting Led the backend team; 3,000 → 1,000-line refactor (+20% perf); >85% coverage; Tableau deployment PoC → production; built a local RAG system
Apr 2022 – Jan 2023 Agero Serverless data sync FastAPI on AWS Lambda from scratch; S3 events → EventBridge → Lambda → MongoDB data sync; GitHub Actions CI/CD; React job dashboard
May 2019 – Apr 2022 Humana Healthcare · specialty pharmacy Led the backend agile team; Tesseract OCR services in Flask integrated with .NET apps; Django; React
Jun 2018 – May 2019 McKesson Pharma SaaS Flask + MS SQL; Angular + C# Web API; Express/Node portal with TDD
Sep 2017 – May 2018 Woolworths (Sydney) Retail ASP.NET/C# N-tier; Azure App Insights monitoring; Sev-1 incident response
Jan 2016 – Aug 2017 CVS Health Pharmacy apps Led API development; AngularJS SPA from scratch on Web API + SQL Server
2015 Anna University BE Mechanical Engineering The origin story: from gears to graphs

Featured projects

  • ThumbStall (website): free, open-source anti-doomscrolling app for Android (Kotlin, Jetpack Compose, Room). A foreground service polls UsageStatsManager every 900 ms; a pure-Kotlin rules engine in core/ (35 JVM unit tests) decides when to show a breathing pause before a distracting app opens. Repeat opens within an hour escalate the pause from 8 s by 5 s up to 30 s; 5/10/15-minute session budgets unlock only after the countdown; snooze, a costly 24-second override, an essentials allowlist and positive stats. No INTERNET permission, no accounts, no analytics. GPL-3.0, v0.1.1.
  • PangoLock: zero-knowledge folder vault for macOS (Swift/SwiftUI). AES-256-GCM with per-item keys (HKDF-SHA256), master key from PBKDF2-HMAC-SHA256 × 210,000, zero-knowledge verifier, Keychain + Touch ID, verify-before-delete, atomic writes, crash-window tests, 87 XCTest tests, CI on macOS, written threat model. MIT, v0.2.1 (pre-1.0).
  • RAG PDF Genie: ask a 115-page IRS PDF questions with a fully local LLM (LangChain, Ollama llama3.2 + nomic-embed-text, ChromaDB, Streamlit). No API keys; the document never leaves the machine.
  • OCR trilogy: one OCR engine, three deployments: tesseract-ocr (FastAPI on Heroku, 2020) → tesseract-flask (Flask-RESTX on Docker Hub, 2021) → tesseract-pillow (Flask web UI with Heroku + Azure CD, 2022).
  • Express observability lab: Express CRUD API with prom-client (request counter + latency histogram by method/route/status) and winston-loki logs; Prometheus, Grafana and Loki via Docker Compose.
  • Containers & Kubernetes: Flask API, 5 replicas behind a LoadBalancer Service on Minikube; Docker Hub images suriya4code/python-flask-microservice and suriya4code/flask-ocr.

Tech stack Python, C#/.NET, JavaScript, TypeScript, Swift, Kotlin, Java, Bash, SQL · FastAPI, Flask/Flask-RESTX, .NET Web API/Core, Node/Express, Django · React, Angular/AngularJS, Vue, Redux, SwiftUI, Jetpack Compose · AWS (Lambda, Step Functions, DynamoDB, EventBridge, S3, Glue/Spark, EKS/ECS), Azure, Heroku · GitHub Actions, Docker, Kubernetes, Jenkins · MS SQL Server, MongoDB, PostgreSQL, Oracle, Redshift, DynamoDB, Tableau, pandas/NumPy · PyTest, Playwright BDD, Vitest/RTL, XCTest, TDD · Prometheus, Grafana, Loki, CloudWatch, Azure App Insights · Claude Code + MCP + Copilot, local RAG, Tesseract OCR

Certifications Anthropic: Claude Code in Action, Introduction to Model Context Protocol, Claude 101 (Aug 2026) · Microsoft: AZ-204 (Azure Developer Associate), AI-900, AZ-900

Contact LinkedIn · Stack Overflow · Docker Hub · suriya4code@gmail.com

Pinned Loading

  1. PangoLock PangoLock Public

    🫆🔐 Hide & AES-256 encrypt folders on macOS — zero-knowledge, open source, 100% free. Native SwiftUI app with wallet, portable lockers, encrypted sharing & recovery.

    Swift 1

  2. RAG_PDF_Genie_with_Local_LLM RAG_PDF_Genie_with_Local_LLM Public

    Python

  3. tesseract-ocr tesseract-ocr Public

    Pytesseract, Fast API in heroku to OCR image files on post requests

    Python 2

  4. Babylon_Vue Babylon_Vue Public

    TypeScript 2