Khaled M. - Senior/Staff Backend Engineer

Berlin, Germany

Experience

Mar 2022 - Present

3 years 9 months

Designed a unified ingestion platform with YAML-based configuration, enabling new dealer data pipelines to be onboarded without code changes, cutting setup time from ~2 months to 2-3 days and improving scalability by 40%.
Acted as the company's Keycloak expert, scaling it for multi-tenant identity management and extending functionality with custom plugins and delegated admin APIs.
Developed a back-office application integrated with Salesforce, enabling dealers to manage inventory, convert leads, and handle support requests in real time.
Collaborated across backend teams to migrate core services into a unified multi-tenant cluster, ensuring high availability.
Optimized monorepo delivery by implementing CircleCI dynamic config with NX, deploying only affected UI projects and drastically cutting build times.
Enhanced monitoring and release reliability while mentoring backend engineers and improving code review standards.

Aug 2019 - Feb 2022

2 years 7 months

Riga, Latvia

Redesigned and optimized microservice architecture to improve scalability, resilience, and fault tolerance across distributed environments.
Led a distributed team across Latvia, India, and the UK, coordinating with product owners and scrum masters to align technical priorities with business outcomes.
Introduced Kafka-based event streaming and reactive programming (RxJava3) to eliminate system bottlenecks and boost throughput.
Refactored Activiti 7 to handle complex manager approvals and multi-stage workflows, reducing project delivery times.
Designed fault-tolerance algorithms and improved monitoring, reducing intermittent production issues and bug rates by over 70%.
Mentored engineers, introduced modern frameworks, and scaled team capability through knowledge sharing and technical workshops.

Jul 2016 - Jul 2019

3 years 1 month

Cairo, Egypt

Developed and maintained backend modules for subscriptions, service usage, and product catalogs as shared components across multiple markets.
Introduced RxJava2 for parallel API orchestration and fault-tolerant middleware calls, significantly enhancing response times and reliability.
Collaborated with Pivotal experts in Portugal to migrate legacy services to PKS Cloud Foundry and Skytap, driving global cloud adoption.
Implemented auto-scaling and fault-recovery strategies for high-load middleware runtimes and API gateways.
Streamlined build and release pipelines using Jenkins, GoCD, and Ansible, reducing manual steps and deployment errors.
Contributed to the development of DXL, a global middleware platform connecting payments, subscriptions, and account services, focusing on scalability, fault tolerance, and cloud-native transformation.

Mar 2014 - Jun 2016

2 years 4 months

Cairo, Egypt

Built event-driven workflows using BPMN for pickup, delivery, and return operations on the Lastmile logistics platform.
Developed matching algorithms for optimal vehicle allocation and resource utilization.
Implemented multi-level authorization with Spring Security and OAuth2.
Designed real-time dashboards with WebSockets for live delivery tracking.