Shajan Jacob

Software Engineer

Kochi, Kerala, India

shajanjp at gmail dot com

shajanjacob.com

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Professional Summary

Senior Software Engineer and Technical Lead with 8+ years of experience designing and building scalable backend systems, APIs, microservices, and cloud-native applications using Node.js and TypeScript. Experienced in system architecture, performance optimisation, event-driven systems, healthcare platforms, and engineering leadership. Proven track record of scaling high-throughput APIs, modernising legacy systems, mentoring engineers, and driving AI-assisted software development practices.

Technical Skills

Languages & Backend

Node.js TypeScript JavaScript NestJS Express.js Deno

Architecture & APIs

Microservices REST APIs Event-Driven Architecture Real-Time Systems gRPC WebSockets

Cloud & DevOps

AWS (Lambda, EC2, API Gateway, S3) GCP (Pub/Sub, Cloud Storage, FHIR) Firebase Docker Kubernetes Nginx

Databases & Messaging

MongoDB PostgreSQL MySQL Redis Elasticsearch Kafka GCP Pub/Sub

AI & Automation

LLMs AI Agents LangChain AI-Assisted Development Tool Calling MCP RAG Prompt Engineering n8n

Professional Experience

Sorice Solutions, Kochi

Technical Lead

Feb 2020 - Nov 2025

  • Architected and delivered backend systems and core platform capabilities for U.S. healthcare applications, focusing on scalability, reliability, security, and maintainability.
  • Optimised high-throughput APIs serving 300K+ requests per day, reducing average response times by 25% and improving overall system performance.
  • Modernised legacy applications and migrated systems to newer frameworks, reducing development effort for modifications and new features by 20%.
  • Identified and remediated security vulnerabilities across internal and customer-facing applications, strengthening application security and compliance.
  • Designed deployment and release strategies across multiple environments and client deployments, reducing release effort and production incidents.
  • Drove AI-assisted software development practices across the engineering team, guiding developers in effectively integrating AI tools into development workflows.
  • Built internal developer tools and automation to eliminate repetitive engineering tasks and improve team productivity.
  • Led code and architecture reviews, established engineering standards, and mentored junior and mid-level developers.
  • Participated in technical hiring and interviewed 300+ software engineering candidates, while improving interview feedback and tracking workflows.
  • Contributed across the complete software delivery lifecycle, including architecture, planning, estimation, implementation, release, and cross-team coordination.

Cubet, Kochi

Software Engineer

Oct 2017 - Feb 2020

  • Designed and developed REST APIs, microservices, and serverless applications using Node.js, AWS Lambda, and Firebase Cloud Functions across multiple production platforms.
  • Published ffmpeg-sdk, an NPM wrapper for FFmpeg, powering media-processing workflows for an online video transcription and dubbing platform.
  • Engineered a scalable real-time Twitter chat platform supporting multiple chatbot instances and text/audio communication using WebSockets.
  • Delivered backend solutions across media processing, electronic BOM management, CSR, and matchmaking platforms from prototype through production deployment.
  • Diagnosed and resolved production-critical issues, improving application reliability and operational stability.

Alt S Solutions, Kochi

Junior Software Engineer

May 2017 - Oct 2017

  • Developed responsive web applications, CRM dashboards, and backend APIs for client projects.

Education

Bachelor of Engineering in CS

T John Institute of Technology, Bangalore

2017

Achievements

  • Ranked in the top 2% globally in LinkedIn's JavaScript skill assessment.

Hobby / Side Projects

Clockwall

Time zones, simplified. This virtual clock wall makes it easy to track time across different time zones.

clockwall.app

Community Town Portal

One-stop platform to discover local businesses, services, restaurants, food menus and attractions for residents and visitors.

Deepseek Usage Analysis Tool

A self-hosted dashboard for visualising your DeepSeek AI API usage - daily costs, token consumption, cache hit rates, and per-key breakdowns.

github.com/shajanjp/deepseek-usage

Co-Apply

AI-powered Firefox browser extension that uses an LLM API to intelligently autofill web forms.

Firefox Addon Page

Profiles

Hobbies

Terrariums Photography Crafting