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Wahaj A.

Fullstack Developer

Stockholm, Sweden

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About Me

I am a Senior Fullstack Developer with 6+ years of experience building beautiful, clean, and simple applications on projects. I handle frontend, backend, design, architecture, development, DevOps, CI/CD, monitoring and logging tasks - providing end-to-end services to enhance features, functionalities and components on solutions. I have a technical understanding of new concepts and technologies in aggregating standards and best practices on projects.

JavaScript 6 years Typescript 5 years Sequelize React.js 5 years Node.js 6 years Express Nest.js 2 years Python Flask Bitbucket 2 years JIRA 2 years Elastic Search 2 years Kibana 2 years AWS 6 years AWS S3 5 years ECS 2 years AWS RDS 2 years AWS Elastic Beanstalk Fargate 2 years Lambda 2 years Docker 5 years DataDog 2 years Splunk 2 years Redis 2 years Kafka 2 years MongoDB 3 years

Work history

UpStack

Fullstack Developer

2022 - Present (2 years)

Remote

Creating and developing innovative software solutions for clients across a broad range of industries.
Participate in scrums consisting of cross-functional teams, both software and hardware.
Ensure that features are being delivered efficiently and on-time.

JavaScript AWS Node.js Typescript Docker React.js MongoDB ECS

Klarna

Software Engineer

2020 - Present (4 years)

Stockholm, Sweden

Designed and implemented solutions to migrate a legacy Scala code to TypeScript - working component by component on the solution.
Wrote and deployed several web scrapers to maximize customer KPIs for the team - enhancing coverage from 70% to 80%.
Developed a new cache to improve overall system performance - collaborating with other devs to migrate and test services.

JavaScript Typescript React.js DataDog Splunk Bitbucket JIRA AWS API Gateways Jenkins Microservices Redis Kafka AWS S3 Lambda

Red Buffer

Senior Software Engineer

2018 - 2020 (2 years)

Islamabad, Pakistan

Designed and implemented a scalable architecture on a sports-related mobile app with real-time commentary features.
Worked on a serverless web tool that helps users design custom charts in Adobe XD - delivering different solutions for the tool.
Built and deployed solutions across the stack for an AI-based content management platform that allows users to read and upload PDF reports.

React.js Node.js ECS AWS RDS Docker Gitlab Typescript Nest.js Fargate JavaScript Vue.js Elastic Search Kibana APM AWS S3

DealSmash

Fullstack Developer

2017 - 2018 (1 year)

Islamabad, Pakistan

Designed and launched the architecture and APIs for DealSmash's mobile app - delivering the FSM pipeline to handle user receipts.
Led and influenced the development of the loyalty program on the app with features for users to redeem points with various vouchers.
Developed a React-based dashboard to help merchants analyze in-app purchases, run promotions, and send notifications.

JavaScript Node.js Express AWS Elastic Beanstalk AWS S3 AWS RDS ABBYYFineReader Redux-Saga React.js Redux Sequelize Python Angular Flask

CyTech Solutions Pvt Ltd

Fullstack Developer

2016 - 2017 (1 year)

Rawalpindi, Pakistan

Designed and implemented jQuery/AJAX on a web solution to enhance the web page and the overall end-user experience.
Developed and deployed a micro Dapper ORM into CyTech's dev process - increasing the efficiency and performance of solutions.
Developed a VoIP client using SIP.js for audio calls to a mobile phone - configuring SIP trunks and Asterisk server on the backend.

ASP.NET MVC Dapper Entity Framework jQuery Bootstrap Asterisk VoIP

Portfolio

Fullstack Developer - Odin Chart

Worked on Odin Chart, a Vue.js-based data-agnostic tool that helps users design custom charts on Adobe XD. The app allows users to choose graphs and charts like pie, donut, line and area to visualize data uploaded in CSV format or copy-pasted. Implemented a parse server on the backend to write and update data to the database.

Fullstack Developer - Monarch Tracker

Designed and built a vehicle tracker app that provides real-time location of vehicles and comes with a central dashboard that plots them on a map. Influenced the design of the backend architecture and the web dashboard on the project - processing and providing users with real-time information on location, state, speed, mileage, and fuel status.

Fullstack Developer - RaveOn

Built a mobile application with features for real-time match commentary for several sporting events like NBA, NCAA and UEFA competitions. Implemented backend solutions on the app and deployed admin dashboards. It uses SportsRadar API to fetch live sporting events and broadcast them to a user's mobile phone in real-time using WebSockets.