Haidar A is a Senior Backend Engineer with over five years of experience building scalable, cloud-native systems using Spring Boot, Node.js, and AWS across CleanTech, SportsTech, and Publishing industries. At Createch IT Solutions, he architected geospatial data pipelines and designed on-demand reporting services for large environmental datasets, optimized distributed caching for faster API performance, and deployed containerized microservices through automated CI/CD pipelines. His backend expertise extends to event-driven… Show more

1. Senior Backend Engineer

   Createch IT SolutionsJun 2022 — Present

   • Architect ETL geospatial data pipelines for data ingestion, sanitization, and validation using Spring Boot for large environmental datasets to enable large-scale environmental planning analyses
   • Design on-demand report services such as carbon footprint report generation from complex spatial datasets
   • Optimize database queries and implement event-driven distributed caching strategy to cut DB load and boost API response times by ~15% in load tests
   • Apply TDD with JUnit and Mockito for unit tests and RestAssured for automated API testing of key services; utilize Testcontainers to validate end-to-end integration
   • Containerize services with Docker and deploy them to EC2 via a GitHub Actions CI/CD pipeline to enable zero-downtime releases
   • Participate in sprint planning, design decisions, product design, and code reviews in an agile environment

   Spring BootJUnitMockitoDockerAWS LambdaPythonFastAPIPostgreSQLRedis
2. Software Engineer

   Self-EmployedMar 2021 — Apr 2022

   • Partnered with international clients to gather requirements and agree on solutions aligned with business goals
   • Engineered and refactored full-stack solutions using NestJS, Node.js, and AWS
   • Delivered 8+ tailored software solutions for clients and earned a Top Rated status (4.7/5) on Upwork

   NestJSNode.jsAWSReactAWSPostgreSQL
3. Backend Engineer

   MicroAgility ServicesOct 2020 — Mar 2021

   • Designed RESTful APIs with Spring Boot with a reusable service layer for a mobile-first U.S. consultation firm
   • Migrated and refactored core MongoDB schemas to improve data integrity and cut query time by ~20%
   • Built a push notification microservice using Amazon SQS to boost real-time user engagement
   • Collaborated remotely with the team, contributed to design decisions, ran code reviews, and wrote documentation

   Spring BootMongoDBAmazon SQSNode.jsJava
4. Full Stack Engineer

   KapOnTwoDec 2018 — Aug 2020

   • Architected and developed a basketball sports analytics platform
   • Implemented core features for play-by-play stats logging, automated video highlights
   • Built a worker service to transcode videos into compatible formats that reduced storage costs by 40%

   Node.jsReact
5. Technical Author

   BaeldungJun 2021 — Present

   • Published 150+ in-depth articles on programming, infrastructure, and Linux, reaching thousands of developers
   • Increased publishing throughput by 1.5× via research across 2,500+ topics, ranking in the top 5% of contributors

   JavaDockerKubernetesLinux

1. Bachelor of Science in Software Engineering

   University of SwatSwat, Pakistan2014 — 2018