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Sandeep Bajpai
🇮🇳India
Created AtUpstaffer since September, 2026
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Sandeep Bajpai — Technical Lead & Backend Architect

Expertise in Back-End Web (10.0 yr.), Cloud Infrastructure Engineer (6.0 yr.).

 Last verified on September, 2026

Bio Summary

  • Technical Lead & Backend Architect with 10+ years in scalable backend systems using Node.js, PHP (Laravel, CodeIgniter), and AWS.
  • Expertise in microservices, cloud-native architectures, and performance optimization, achieving 40% faster system response.
  • Proven track record in legacy system modernization, API design, and integrating complex third-party services like Facebook and Google APIs.
  • Strong leadership in mentoring engineering teams, enforcing code quality, and implementing DevOps best practices with Docker and AWS.
  • Computer Science B.Tech graduate with extensive experience in database design (MySQL, MongoDB, Postgres) and real-time high-volume application development.

Technical Skills

Programming Languages PHP
PHP Frameworks CodeIgniter, Laravel
JavaScript Frameworks Express, Node.js, React
Databases & Management Systems / ORM Firebase, MongoDB, MySQL, PostgreSQL, Redis
Cloud Platforms, Services & Computing AWS, Firebase
Amazon Web Services AWS CloudFront, AWS EC2, AWS S3
Virtualization, Containers and Orchestration Docker, Kubernetes
SDK / API and Integrations Facebook API, Google API, OAuth, Twilio
Version Control Git, Gitflow
Other Technical Skills RazorPay, RDS

Work Experience

Technical Lead | Backend Architect - Tycho Technologies Pvt Ltd (Core API Re-architecture and Audience Management Integrations)

Duration: August 2024 - Present

Summary:

  • Re-architected the core API layer and led integrations with Facebook and Google for audience management, enabling seamless syncing of custom audiences without manual uploads
  • Tycho Technologies is a company focused on delivering scalable backend solutions and cloud APIs

Responsibilities:

  • Re-architected core API layer using Node.js and PHP CodeIgniter on AWS.
  • Led end-to-end Facebook and Google audience-management integrations including OAuth, rate-limit handling, and retry logic.
  • Built and mentored a 4-developer backend pod with code reviews, PR checklists, and pairing sessions.

Technologies: Node.js, PHP CodeIgniter, AWS, Facebook API, Google API, OAuth, Docker

Team Lead - Tycho Technologies Pvt Ltd (Multi-product Delivery and AWS Migration)

Duration: June 2021 - August 2024

Summary:

  • Led a cross-functional team delivering PHP and Node
  • js products across multiple client engagements
  • Migrated production applications to AWS, improving infrastructure and reducing costs

Responsibilities:

  • Led a team of 5+ developers delivering PHP (Laravel/CodeIgniter) and Node.js products.
  • Owned sprint planning, technical estimation, and delivery sign-off.
  • Migrated three production applications from legacy shared hosting to AWS (EC2, RDS, S3, CloudFront).
  • Established code-review and Git-flow standards and onboarded new engineers.

Technologies: PHP (Laravel, CodeIgniter), Node.js, AWS (EC2, RDS, S3, CloudFront), Git

Sr. PHP Developer - Tycho Technologies Pvt Ltd (Admin Panel Rebuild and Payment Gateway Integration)

Duration: August 2020 - June 2021

Summary:

  • Rebuilt the core admin panel and designed the first REST API layer for the platform
  • Took ownership of payment gateway integration and automation of finance reconciliation

Responsibilities:

  • Rebuilt admin panel using Laravel and MySQL replacing CodeIgniter codebase.
  • Designed and shipped REST API layer enabling mobile client development.
  • Managed payment gateway integration (Razorpay) and reconciliation jobs.

Technologies: PHP (Laravel), MySQL, REST API, Razorpay

Senior Software Engineer - Keepme.ai (Backend Systems and CRM Development)

Duration: August 2024 - Present

Summary:

  • Designing and developing scalable backend systems and APIs with microservices architecture
  • Building CRM, audience management, and automation solutions integrated with multiple platforms

Responsibilities:

  • Design and develop backend systems and APIs using PHP, Node.js, and microservices.
  • Build CRM, audience management, and automation integrated with Facebook, Firebase, Twilio, and third-party APIs.
  • Work on real-time systems, notifications, analytics dashboards, and performance optimization.
  • Lead feature development, code reviews, debugging, and deployment.
  • Develop cloud-native solutions using Docker, Kubernetes, MySQL, MongoDB, Redis, and AWS.
  • Collaborate with cross-functional teams to deliver secure and reliable software.

Technologies: PHP, Node.js, Microservices, Facebook API, Firebase, Twilio, Docker, Kubernetes, MySQL, MongoDB, Redis, AWS

Senior PHP Developer - Allsport.in by Khelo Tech & Strategy (KTSPL) (Fantasy Sports Scoring Engine)

Duration: June 2020 - August 2020

Summary: Developed a fantasy sports scoring engine handling concurrent contest evaluation for thousands of users per match, ensuring real-time updates and database efficiency.

Responsibilities:

  • Developed fantasy sports scoring engine in PHP.
  • Implemented cron and queue infrastructure for near-real-time match event processing.
  • Ensured user-facing updates without overwhelming the database.

Technologies: PHP, Cron, Queue infrastructure

PHP Developer - Sublime E Solution (Client Web Applications and Database Optimization)

Duration: January 2018 - May 2020

Summary:

  • Delivered over 10 client web applications in PHP across ecommerce, lead-generation, and CRM domains
  • Led database design and API development improving query performance

Responsibilities:

  • Developed client web applications using PHP (Laravel and CodeIgniter).
  • Owned database design and API layers including migrations to normalized schemas.
  • Mentored junior developers on PHP best practices and code reviews.

Technologies: PHP (Laravel, CodeIgniter), MySQL, API design

Web Developer - 7Server (Client Website Development and Maintenance)

Duration: May 2015 - December 2017

Summary:

  • Built and maintained client websites using PHP, MySQL, and front-end technologies
  • Managed full client delivery cycle from requirements to deployment

Responsibilities:

  • Developed and maintained websites using PHP, MySQL, HTML/CSS, JavaScript, Bootstrap, and WordPress.
  • Handled requirements gathering, scoping, building, and deployment.

Technologies: PHP, MySQL, HTML, CSS, JavaScript, Bootstrap, WordPress

Education

  • HI-TECH INSTITUTE OF ENGINEERING AND TECHNOLOGY, GHAZIABAD
    B.Tech, Computer Science
    July 2011 - May 2015
  • Christian Inter College
    Highscool & Intermidiate, PCM
    July 2008 - May 2011

Certification

  • Yuva AI for All

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