Qaiser A.
Freelance DevOps Engineer
Experience
Freelance DevOps Engineer
HUK-Coburg
Migrated and optimized core services in a hybrid cloud environment to increase scalability and maintainability
Took over technical responsibility for Go-based development after the only Go expert left, strengthening the team's AWS and Terraform skills
Designed and implemented data services to build a service catalog with Backstage.io
Developed a Kafka HTTP proxy in Golang as a secure replacement for the Confluent version
Created a high-performance Lambda function as a custom AWS API Gateway authorizer and packaged it as a central Terraform module
Extended a TypeScript-based pipeline to integrate with IBM API Connect
Created a technical blueprint for transferring large BLOBs from the AWS VPC to the secured on-premise network
Provided team coaching on AWS, Terraform, Golang, and Quarkus
Freelance DevOps Engineer
AboutYou (SCAYLE Storefront)
Developed a service facade to encapsulate core business logic (cart, wishlist, search, etc.) with a focus on scalability and performance
Initiated and led the replacement of a hard-to-maintain PHP legacy interface with a high-performance Go implementation
Significantly improved API performance and scalability compared to the legacy PHP interface
Collaborated with tech leads on architecture decisions and evaluated new technologies
Contributed to the development of the open-source TypeScript SDK for the Storefront API
Coached and supported junior developers in Golang
Freelance DevOps Engineer
RTL
Implemented central data and search services for the new RTL+ app
Advised on buy-vs-build decisions for Elasticsearch (self-hosted vs. cloud service)
Developed a microservice architecture with Python in Google Kubernetes Engine (GKE)
Evaluated the performance of the new interfaces
Supported stakeholder management by coordinating and communicating between business units
Freelance DevOps Engineer
Delivery Hero
Assisted the backend team with integrating the partners API and optimizing internal backoffice applications
Implemented additional use cases for order processing, central product database, and catalog management
Improved continuous integration and deployment workflows
Revamped and expanded the test suite with a focus on reliability and efficiency
Freelance DevOps Engineer
IKEA
Developed and enhanced a Google Cloud application in the warehouse & logistics area to connect the WMS to robotic storage components
Built microservices on Google Cloud Platform using Cloud Functions and Cloud Run
Automated the infrastructure with Terraform
Supported the product owner in requirements analysis
Freelance DevOps Engineer
Taxdoo
Designing and implementing a high-performance import service for transaction data from third-party payment providers
Developing a low-latency import service with AWS Lambda
Designing a data warehouse setup including visualization with AWS QuickSight
Developing interfaces for automated VAT ID verification
Lecturer in Software Engineering
FOM Hochschule
- Teaching software engineering
Freelance DevOps/Cloud Engineer
Freelance IT Consulting
- Specializing in DevOps and cloud infrastructure
Freelance DevOps Engineer
SAP Cloud Platform Application Performance Monitoring
Conducting a feasibility study for cloud cost optimization in Dynatrace Synthetic Monitoring and evaluating a self-hosting strategy
Implementing a Terraform deployment for ActiveGate in various target clouds
Performing benchmark analyses with hardware sizing recommendations
Further developing the SAP-internal Dynatrace CLI tool in Golang
Senior DevOps Engineer, Search
SoundCloud
Further developing search systems and operating large-scale Elasticsearch clusters (~100 nodes)
Reducing reindex time from 6 to 1 hour and improving p95 search latency by four times
Creating A/B test proposals and RFCs (e.g., exact match searches)
On-call duties and incident management handling up to 2,000 queries per second
Senior DevOps Engineer, Product Development
Dibuco
- Development of a Big Data platform
Senior IT Consultant
Codecentric
- Java and DevOps consulting for Douglas, Aareal Bank, and FAZ
IT Consultant
Novatec Consulting
- Java consulting for Commerzbank, Daimler, Bosch, and Swissgrid
Bachelor of Science in Computer Science
Frankfurt University of Applied Sciences
- Bachelor thesis: Evaluation of BeanTest
Summary
I have deep experience in designing and implementing cloud-based infrastructures and optimized DevOps solutions. I have migrated and optimized core services in hybrid cloud environments, led Go-based development teams, and implemented scalable data and API services using AWS, Terraform, and Golang. I have a solid track record in container orchestration, serverless application design, and building efficient pipelines for service integration.
I excel in technical coaching and simplifying complex architectures for better performance and scalability. My work in diverse industries, from media to retail and logistics, has sharpened my ability to deliver high-quality solutions that streamline operations and improve system reliability.
Languages
Education
Frankfurt University of Applied Sciences
B.Sc. · Computer Science · Frankfurt, Germany
Certifications & licenses
TDD Workshop with Robert C. Martin
Codecentric
AWS Developer SAP Cloud APM
AWS Solutions Architect (WIP)
SoundCloud
Elasticsearch Engineer 2
Taxdoo
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