Hi, I'm Zeeshan 👋
Backend-leaning Software Engineer / Platform Engineer

ABOUT ME

Backend-leaning Software Engineer / Platform Engineer with 4+ years of experience building cloud-native, SaaS systems used by enterprise and high-scale consumer platforms. Strong ownership across system design, backend architecture, cost optimization, and secure application development. Experienced in AWS and GCP, serverless and microservices architectures, and data-intensive systems. Known for translating business problems into scalable technical solutions and collaborating effectively with non-technical stakeholders.

KEY ENGINEERING STRENGTHS

  • Cloud-native backend & platform engineering (AWS, GCP)
  • Distributed & serverless system design
  • Cost optimization & performance tuning
  • Secure system design (application & cloud security)
  • API design (REST, GraphQL)
  • CI/CD & infrastructure as code

WORK EXPERIENCE

Rebolet

July 2024 - March 2025
Berlin, Germany - Remote
Senior Software Engineer
  • Architected and delivered a serverless customer return portal using AWS Lambda and AppSync GraphQL, serving 100,000+ users and reducing manual inspection effort by 50%.
  • Designed a multi-platform integration layer leveraging Strategy and Mapper patterns to abstract Shopify, ChannelEngine, and Macke APIs, with sequential query fallback ensuring high reliability and error isolation
  • Implemented hierarchical BigQuery category traversal with statistical fallback, adopting GraphQL over REST for flexible querying and reduced over-fetching, and secured access via API keys stored in AWS Secrets Manager for fine-grained control
  • Architected and implemented a serverless invoicing module within the Supplier Portal using Google Cloud Functions, Express.js, and BigQuery, enabling automated batch invoice generation with retry logic, rate limiting, and timezone-aware processing, and seamlessly integrating with Zoho Books API to convert sales and logistics data into accurate invoices for multiple suppliers.
  • Collaborated directly with leadership and non-technical stakeholders to align engineering decisions with business objectives.
Industry:
B2C, B2B and B2B2C SaaS and versions of our app
E-Commerce
Retail
Re-Commerce
Logistics

Rebolet

July 2022 - July 2024
Berlin, Germany - Remote
Software Engineer
  • Led the design and development of an enterprise Product Information Management (PIM) system, centralizing product data across multiple e-commerce platforms.
  • Deployed and operated a self-hosted Directus platform on Google Cloud Run using Docker, Cloud SQL, and Cloud Storage, significantly reducing operational overhead.
  • Integrated BigQuery for real-time supplier and product analytics, enabling data-driven decision-making for internal teams.
  • Improved application performance and reliability through CDN caching, backend optimizations, and CI/CD pipeline improvements, reducing deployment friction by 30%. Optimized backend APIs and frontend delivery (tree-shaking, bundle optimization), reducing load times by 35%.
  • Implemented access-control and permission systems to meet internal security and compliance requirements.
Industry:
B2C, B2B and B2B2C SaaS and versions of our app
E-Commerce
Retail
Re-Commerce
Logistics

HackerOne

August 2017 - January 2021
San Francisco, California - Remote
Security Researcher (Bug Bounties & Vulnerability Research)
  • Recognized by industry leaders like Meta, Airbnb, Toyota, Snapchat, HackerOne, Shopify, and Spotify for identifying security vulnerabilities impacting 100M+ daily users. Notably, Authored a top-ranked HackerOne report, on Nov 10, 2017, which led the HackerOne Hacktivity dashboard for two months, serving as a key resource for security researchers.
  • Earned several badges, including Greybeard for submitting valid reports for more than one month in a row, Good Samaritan for resolving issues with teams that do not pay, Belle of the Ball for a top-ranked Hacktivity report which maintained a high-impact presence in the security community, contributing to industry best practices and Hacking Hackers. https://hackerone.com/zeesek/badges

EDUCATION

Bahria University E-8 Campus

February 2020 - February 2024
Islamabad, Pakistan
Bachelors In Information Technology
Projects

I like building things

I've worked on a variety of projects, from simple websites to complex web applications and I like builiding tools that make life easier for other devs. Here are a few of my favorites.

Product Information Manager

The Product Information Manager (PIM) is a headless CMS-based system built on Directus that enables us at Rebolet to effectively track, manage, and enrich product data across multiple e-commerce channels and marketplaces. The system automates product enrichment, pricing, inventory management, and multi-channel synchronization.

Supplier Portal Dashboard

The Supplier Portal Server Side is a microservices-based serverless architecture built on Google Cloud Platform, designed to provide a comprehensive backend system for supplier management, analytics, invoicing, and inventory operations. The side on the system I worked on serves as the backend API for a supplier-facing portal, enabling suppliers to:

  • View sales analytics and performance metrics
  • Track inventory and product data
  • Access financial information and invoices
  • Manage account settings
  • Query contract metadata and fee history
  • Upload bulk inventory files

Customer Return Portal

The Customer Return Portal (CRP) is a serverless 1 page facing web application that enables customers to initiate and manage product returns across multiple e-commerce platforms. The system serves 100,000+ users and has reduced manual inspection effort by an estimated 50% through automated condition grading and return label generation.

VAssist

Developed a Virtual Assistance Platform for users where they can connect on a single platform to have an interaction and exchange information live, they can get help or get paid for providing help.

Active Tracker

Developed a Workout Tracker App to keep track of all your activity inside gym.

React Custom Hooks VSCode Extension

Developed a VS Code extension to streamline real-time development by providing ready-to-use React custom hooks. Simplified workflow, reduced boilerplate, and improved code consistency for JavaScript and TypeScript projects by dynamically adapting hooks to project needs.

And much more. To explore additional projects, please checkout my Github.

Contact

Get in Touch

Want to chat? Just shoot me a dm with a direct question on LinkedIn and I'll respond as soon as I can.