
Sayed Ahmad
Verified Expert in Engineering
Full-stack Developer
Dhaka, Dhaka Division, Bangladesh
Toptal member since September 15, 2022
Sayed is a full-stack .NET developer with six years of experience focusing on analyzing requirements, designing and building large-scale distributed systems with Azure technologies, and developing microservices. He has contributed to all parts of the SDLC, including architectural design, and worked with a wide range of technologies and industries. Sayed has sound knowledge of algorithms and data structures, excellent problem-solving skills, and a bachelor's degree in computer science.
Portfolio
Experience
- Microsoft SQL Server - 5 years
- Data Structures - 5 years
- REST APIs - 5 years
- JavaScript - 5 years
- C# - 5 years
- ASP.NET Core - 5 years
- Back-end Development - 5 years
- Angular - 3 years
Availability
Preferred Environment
Windows 11, Google Meet, Visual Studio, Windows 10
The most amazing...
...thing I've done was scale a system, enabling it to send 20 times more emails than it could before.
Work Experience
Software Technical Lead
Enosis Solutions
- Designed and developed a highly scalable containerized messaging microservice to send millions of messages. Used Azure, Service Bus, Event Hub, Azure Container, Azure Cosmos DB, Dapr, gRPC, Open API, Twilio, and SendGrid.
- Integrated the microservice into the existing system and built the campaign-based messaging system using it.
- Managed two .NET development teams of 18 members.
PowerShell Expert| Hr
Nuovo Photography Inc
- Wrote PowerShell Script to install multiple applications for Windows 11.
- Created PowerShell Script to remove all bloatware from Windows 11.
- Fixed existing Windows 10 PowerShell Script, which was not working for Windows 11.
Senior Software Engineer
Enosis Solutions
- Contributed to all stages of software development, including designing and developing new features, integrating third-party services, and maintaining the existing codebase.
- Designed the codebase using the Singleton, Adapter, and Façade design patterns and principles.
- Performed requirements analysis through written and oral communication with the client and executed the analysis toward the development.
- Led a team of nine .NET developers to build the application from scratch, upgrade to newer .NET core versions, implement new features, and improve the security and overall performance of the application.
- Designed and developed the architecture of an email microservice integration into the existing promotional mailing module.
- Troubleshot technical and functional issues and coordinated resolution with development and Tier 3 teams.
- Designed and developed RESTful web APIs and databases while ensuring quality performance, reliability, and security.
- Reduced the email template rendering by more than 500% by optimizing the underlying stored procedure. Scaled the system to send emails or SMS to millions of people by introducing Azure Service Bus, Functions, and WebJobs.
- Migrated two existing projects with Azure technologies and deployed them into Azure App Service.
Software Engineer II
Enosis Solutions
- Implemented standard software engineering methodologies, unit testing, code reviews, and design documentation.
- Developed a referral management system, including the front end, with the help of a ZIP code API to refer patients to the nearest doctor using C#.NET, MVC architecture, JavaScript, and jQuery. Also developed a public portal to see all referrals.
- Refactored two legacy projects and upgraded them to modern .NET MVC architecture.
- Performed written communication, estimation, and task breakdown.
- Implemented encryption and decryption functionality to transfer data securely over the network using CryptoJS.
- Migrated the entire project to support the Canadian culture.
Software Engineer I
Enosis Solutions
- Translated designs into front-end code and integrated the front end with the back end.
- Designed and developed a fully responsive UI for the login and landing pages.
- Wrote unit tests for the existing codebase and used them to verify the business logic.
- Designed a code library for rendering third-party, interactive charting using SVG in Ionic and Angular.
Junior .NET Software Engineer
Black Stone
- Analyzed business requirements to determine project scopes and objectives to deliver high-quality solutions within deadlines.
- Created requirements and designed specifications from high-level requirements.
- Translated designs into functional front-end code.
- Developed a Windows service and installer project to pull customer data periodically from supermarkets at different locations, using Nimble APIs, and sync the database accordingly.
Experience
Dental Practice Management Solution
Multi-vendor eCommerce System
http://chef-net.com/Notification Hub
Quiz Builder Web API
Nimble MCA Customer Service
Human Resources Management System
Real-time Code Collaboration Tool
Order Management System
https://github.com/sayedgkm/SalesOrderManagementEducation
Bachelor's Degree in Computer Science
Military Institute of Science and Technology - Dhaka, Bangladesh
Certifications
Web Application Security with OWASP Top 10 Advanced
eduCBA
Skills
Libraries/APIs
REST APIs, SignalR, jQuery, Entity Framework, Web API, Windows Forms (WinForms), jsPDF, Stripe Connect, Stripe API, Stripe, Moq, React, RxJS, Log4Net, Azure Blob Storage API, Dapr
Tools
Dapper, Git, TFS, Visual Studio, Azure App Service, Azure DevOps Services, Jira, Visual Studio 2019, Bitbucket, GitHub, Microsoft Visual Studio, Microsoft Excel, Spreadsheets, Azure Logic Apps, Google Meet, Skype, NGINX, xUnit, Azure Key Vault, Azure Application Insights, OpenEdge, SendGrid
Languages
JavaScript, CSS, C#, C++11, SQL, HTML, SCSS, Visual Basic .NET (VB.NET), C#.NET, TypeScript, VB.NET, Visual Basic 6 (VB6), Active Server Pages (ASP), Visual Basic, T-SQL (Transact-SQL), HTML5, PHP
Frameworks
ASP.NET Core, JSON Web Tokens (JWT), Angular, Entity Framework Core, .NET, ASP.NET, ASP.NET MVC, .NET Core, VB.NET WinForms, .NET 4, Windows Presentation Foundation (WPF), Razor, ADO.NET, Entity, ASP.NET Web API, Blazor, AngularJS, NUnit, ASP.NET Web Forms, Angular Material, Bootstrap, Ionic, Windows PowerShell, Ionic 4, Ionic 3, gRPC
Paradigms
HTML DOM, REST, Agile, MVC Design, Model View Controller (MVC), Desktop App Development, Azure DevOps
Platforms
Visual Studio 2016, Amazon, Azure, Amazon Web Services (AWS), Azure Functions, Docker, Windows Server, AWS Lambda, Azure Event Hubs, Twilio
Storage
Microsoft SQL Server, SQL Server 2016, JSON, Data Pipelines, IIS SQL Server, Database Architecture, Azure SQL, SQL Server Integration Services (SSIS), MySQL, Azure Cosmos DB, Web Forms, HBase, Amazon S3 (AWS S3), SQL Server Reporting Services (SSRS), PostgreSQL, Azure Cloud Services
Other
Algorithms, Data Structures, Web Development, Windows 11, Back-end Development, APIs, .NET 6, SOAP, SOLID Principles, HTTP, Front-end, PDF, Authentication, Back-end, Troubleshooting, Root Cause Analysis, CSS3 Animation, HTTP Server, Cordova, Webhooks, Message Queues, API Management, Full-stack, User Interface (UI), PDF Design, Third-party APIs, eCommerce, Architecture, Front-end Development, Performance, Web Technologies, WebAssembly (Wasm), Reports, Windows Services, UI Components, Angular Bootstrap, Windows Desktop Software, Stripe Payments, Azure Service Bus, Ajax, Virtual Machines, Microsoft Stack, Documentation, Windows 10, Web Security, Vulnerability Identification, Microsoft Azure, Verifone VX805, SVG, Windows System Administration
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