Nashad Safa
Bothell,WA
Summary
12+ years in developing complex software applications that meet high standards for performance and reliability. Utilizes collaborative approach to ensure team cohesion and project success. Track record of leveraging problem-solving skills and technical expertise to deliver impactful software solutions.
Overview
15
15
years of professional experience
Work History
Senior Software Development Engineer
Aurora Serverless
Seattle, WA
11.2024 - Current
- Led design and delivery of next-generation hardware qualification (R8G) and scaling improvements for Aurora Serverless v2’s placement and host management system.
- Drove end-to-end new hardware qualification for database instance: designed and executed noisy neighbor tests, heat management simulations, scaling tests, and nightly automated test suites across MySQL and PostgreSQL engines. Authored qualification results documentation and coordinated multi-team launch readiness.
- Designed and implemented dynamic scaling rate improvements in the Database Host Manager including token bucket refill rate tuning, dynamic cooldown periods after scale-down, reducing customer-visible throttling events.
- Enhanced Receive Packet Steering (RPS) configuration to dynamically adjust to CPU core count changes across instance types, boosting network throughput for serverless instances.
- Built post-copy live migration feature support in the Placement Service to increase success rate of heat management by 15%.
- Developed operational tools including dedicated host un-adoption tool, migration testing tool, and AI ops agent for investigating availability events and automating log retrieval.
- Proposed predictive heat management strategy using AI forecasting models (Chronos, XGBoost) to mitigate scaling throttles.
Senior Software Development Engineer
AWS Lambda
Seattle, WA
09.2018 - 11.2024
- Led the design and implementation of the re-architected network communication path for Lambda functions attached to a virtual private cloud. The cold start latency was brought down from ten seconds to under 500 ms as a result of this multi-team initiative. The project required deep understanding of network tunneling, network namespace, virtual machine (firecracker), virtual interfaces (tap, bridge devices etc), understanding of DHCP, DNS protocols and overall advanced linux systems knowledge.
- Led the design, implementation and customer experience of IPv6 communication support in Lambda execution environments that are attached to Virtual private cloud (VPC).
- Designed and implemented a custom DHCP client in Golang to run in the Lambda execution environment to reduce DHCP execution time by 30% to improve container initialization time significantly.
- Designed and implemented automated network debugging utilities, network health sensor for Lambda containers.
Software Development Engineer
AWS S3
Seattle, WA
10.2013 - 05.2018
- Implemented cellular architecture on S3 storage system, developing high TPS, low latency routing layer as part of re-architecture.
- Improved PUT throughput by reducing the processing overhead of the erasure encoding code by more than 10%.
- Designed and implemented cost savings for storage through variable availability zone placement, managed complex changes across multiple components and redefined assumptions for storage placement and durability constructs.
- Led the design and implementation of Standard-IA feature on the storage system.
- Developed automated testing frameworks to enhance code quality and ensure continuous integration.
Data Management Consultant
ISolutions Inc
Calgary, AB
04.2012 - 08.2013
- Developed tools to optimize collection, management, and reporting of production data using C#, Office Interop, and PI-SDK from historian database for energy companies.
GIS Software Developer
MRF Geosystems Corp
Calgary, AB
09.2011 - 03.2012
- Developed Land Inventory and Data Application (LinDA) for City of Calgary, integrating with CoC web services (using SOAP) to create a land inventory management system leveraging map data through ArcGIS SDK.
Education
MSc - Computer Science
University Of Calgary
Calgary, Alberta08.2011
BSc - Computer Science and Engineering
Bangladesh University Of Engineering And Technology
Dhaka, Bangladesh2007
Skills
- Application development
- Advanced computer programming
- Performance and scalability optimization
- Testing and debugging
- Golang
- Java
- Python
- C#
- C
- Linux Systems
- Database Systems
- Version control systems
- Containerization technologies
- AI integration
- Cross-functional teamwork
- Hardware qualification
- Software architecture design
Publications
Secure localization using dynamic verifiers
publication date: Sep 12, 2011
ESORICS'11 Proceedings of the 16th European conference on Research in computer security
Privacy-Preserving Implicit Authentication
Publication Date: June 2014
IFIP Advances in Information and Communication Technology
Patent
US-12417115-B1
On-demand code execution computing resource access management
Timeline
Senior Software Development Engineer
Aurora Serverless
11.2024 - Current
Senior Software Development Engineer
AWS Lambda
09.2018 - 11.2024
Software Development Engineer
AWS S3
10.2013 - 05.2018
Data Management Consultant
ISolutions Inc
04.2012 - 08.2013
GIS Software Developer
MRF Geosystems Corp
09.2011 - 03.2012
MSc - Computer Science
University Of Calgary
BSc - Computer Science and Engineering
Bangladesh University Of Engineering And Technology