Aug 2023 – May 2025 · 1 yr 9 mos · Sydney, New South Wales, Australia · Hybrid

• Implemented Authorization and Authentication and Other Services
• Used JWT tokens for secure authentication.
• Developed using Spring Boot framework.
• Adopted micro services architecture, build services for each domain, achieved modularity using docker, cloud run, container registry, secrets etc.
• Added parallel streams and asynchronous programming techniques and enhanced api's performance above 80% in response time.
• ETC
• Integrated Distributed Messaging Queue (RabbitMQ)
• Implemented notification services such as email, push notifications, and SMS.
• Utilized third-party tools like SendGrid and Twilio for email and SMS delivery.
• Achieved Significant Business Growth
• SWAV helped clients conduct $2 million worth of business in 18 months.
• Demonstrated the ability to drive commercial success through technical innovation.
• Led a Multidisciplinary Development Team
• Managed frontend and backend developers to deliver a greenfield product (SWAV.app).
• Made critical decisions about development and deployment strategies.
• Fostered collaboration and ensured timely delivery.
• Optimized Query Performance
• Reduced CPU utilization by optimizing database queries.
• Implemented batch operations to decrease the number of IOPS on RDS for daily import scripts.
• Frontend Development with React
• Utilized state, props, routing, hooks, and other React fundamentals.
• Built a responsive and user-friendly application interface.
• Integrated Multiple Data Sources
• Connected with NetSuite, Xero, Sage, Winmagi, and other platforms.
• Employed various authentication mechanisms: OAuth2, OAuth1, Basic Auth.
• Upgraded AWS EKS Cluster
• Automated provisioning of resources like EKS, EC2, Security Groups, and RDS using YAML files.
• Ensured consistent and repeatable infrastructure deployments.
• Enhanced Security with Parameter Store
• Moved environment variables to AWS Systems Manager Parameter Store.
• Technologies: AWS Parameter Store, Helm Charts, Kubernetes Secrets.

Nov 2021 – Jun 2023 · 1 yr 7 mos · Sydney, New South Wales, Australia · Remote

• Created a microservices for messaging, utilizing Twilio send grid for email and messages, and FCM for cloud messages to mobile applications.
• Implemented code review guidelines, resulting in a decrease in production issues.
• Worked with a team to design scalable microservices and event based back-end for migrating from the
• current monolithic legacy codebase.
• Used the Adapter pattern as part of implementing Domain-Driven Design to decouple domain logic and
• facilitate better code maintainability and flexibility.
• Developed RESTful web services using Spring's @RestController and @RequestMapping annotations.
• Architected and implemented a transactional strategy at the service layer using Spring’s @Transactional
• annotation, optimizing for both performance and data integrity
• Integrated Spring Security to handle authentication and authorization for RESTful APIs and web
• applications.
• Optimized backend logic which was integrated with frontend via wicket, utilized @transactional for
• ensuring appropriate behaviors.
• Improved complicated domain logics, re-wrote domain codebases to simplify code and speed up
• calculations, wrote unit tests.
• Utilized jProfiler to identify memory leaks and fix them.
• Used JPA and Hibernate for different parts of database connection.
• Created a service for integrating Managed Kibana to the database for updating reports.
• Integrated square payment gateway for tier-based subscription model.
• Analyzing, identifying and monitoring issues using AWS CloudWatch and Dynatrace.
• Troubleshooting memory leaks in legacy systems via JProfiler to improve performance issues.
• Worked on MySQL and MongoDB, wrote migration scripts with flyway for database updates on MySQL
• production.
• Built multiple functionalities in the flutter based mobile application for android and iOS.
• Worked with developer to architect flutter application on MVVM.

Mar 2021 – Sep 2021 · 6 mos · Sydney, New South Wales, Australia · On-site

• Managed entire product single handedly
• Communicating product details with client, creating tickets, assigning tasks, and completing them too.
• Worked on angular to add new features to web portal.
• Worked on capacitor to deploy android application based on angular.
• Wrote custom capacitor plugins on Kotlin for Android to communicate with BLE sensors and rfcomm based bluetooth devices.
• Worked on AppSync for offline sync for mobile app.

Sep 2017 – Oct 2017 · 1 mo · Greater Sydney Area

• Understanding current data storage infrastructure and consulting regarding creating better data-warehousing solution for future endavour.
• Extraction of data from AWS-S3 buckets, to RDS databases, writing CRON jobs to perform ETL.
• AWS basics, EC2, RDS, AWS Lambda, research and some hands one.
• Docker and Metabase, data exploration.
• Creating Visualizations.
• Continuous code integration.

Apr 2017 – Mar 2021 · 3 yrs 11 mos · Sydney, Australia

• Responsibilities
• Write new modules, add new features too old modules requested by our clients on the current android app based on Java.
• I have worked with Room, Retrofit 2, ButterKnife, Material Design, Dagger2, Koin, Picasso, Glide, RxAndroid, Firebase SDK (Crashlytics, FCM, Database, Storage), Google SDK (Direction, Static Map, Places etc), AWS SDK (S3 document sync cognito), room database, sqlite and other libraries and frameworks as per the requirements.
• Provide support to any bug in current android application, solve tickets on Freshdesk.
• Google SDKs for Directions, Route Optimisation, Maps and Others.
• Implementing continuous integration and deployment (CI/CD) using Github and CircleCI.
• Continuously upgrade legacy android code base from SDK level 14 to 24, 26, 28 and now 29.
• Implementing architecture like MVVM in our new codebase of android applications built on Kotlin, using data binding.
• Monitoring applications using logs via tools such as Crashlytics/Fabric.
• Added a lot of new code, RxJava, Services, FCM, Firebase SDK, AWS S3 cognito sync and much more.
• Experience of working with JSON API’s, I have even written API’s on Flask, NodeJS and Laravel.
• Understanding of microservice architecture and applications at scale.
• Write custom ETL/Data migration scripts that can handle various sources like Flat files, CSV files,SQL Server databases, and REST API’s.
• Achievements
• Re-Wrote the entire background sync process, backend API and android code base, which improved applications synchronisation time for our offline users 2x-3x.
• Successfully added 18 new modules in our current codebase.
• Removed long, lengthy process of distributing and Implemented CircleCI, CI/CD to automatically deploy APK to play-store in one go. This reduced week work into hours.
• Integrated Multiple third-party API’s into the system, including but not limited to MYOB, Xero, Simtac, and OnTap, built abstract layers for data migration processes.

Aug 2016 – Mar 2017 · 7 mos · Sydney, Australia

• Key Responsibilities
• Architected android application from scratch.
• Completed 2 Flavours of android application. (User/Driver)
• Created php/node.js REST API with mongoDB.
• Peer review code, maintain code readability, debug issues, write some tests.
• Used bitbucket for code sharing in team.
• Used TravisCI for continuous deployment.
• Key Tools and Frameworks
• Java, EJS, ButterKnife, FabricIO (Crashlytics), Retrofit 2.
• PHP, Node.js and Python for backend.
• Pycharm, PHPStorm, SublimeText, Visual Studio Code, Android Studio
• Biitbucket, Gitbash, and Sourcetree.
• Stripe as payment gateway on mobile app and backend integration.
• Observer pattern with mix of MVP in android code, services for detaching views to background processes.

May 2014 – Dec 2014 · 7 mos · Zamzama, karachi

• Used unity 3D engine for graphics intensive mobile applications.
• Used unity 3D to work on research/proof of concept projects utilising leap motion, kinect, oculus and other hardware.
• Worked on image recognition, pattern matching.
• also created first android application on Java using Eclipse IDE.
• Had some exposure to OpenCV, OpenFramework to create jumpcam project.

Mar 2014 – May 2016 · 2 yrs 2 mos · Karachi · On-site

• To understand projects requirements limits and make a deal with client, am also responsible for helping programmers understanding the tasks and develop what is needed. and also work on Android and other projects.
• Project management.
• worked on android apps.
• created c# based windows services, an arbitrage for Karachi Stock Exchange.
• + this was used as service to connect to live stream of future and current index.
• + and Identify opportunities (the differences of prices between two indexes for same stock)
• + and place a buy or sell orders based on predefined criteria set using windows application.