Abuzar Hasanov
Verified Expert in Engineering
Back-end Developer
Baku, Azerbaijan
Toptal member since May 20, 2022
Abuzar is a back-end developer with 15+ years of experience in all phases of the software development lifecycle. He excels in C#, SQL and NoSQL, ASP.NET (+Core), Angular and React, GIS, Azure/AWS, and microservice architecture, as well as Agile development processes, design patterns, data structures, algorithms, and asynchronous programming. Abuzar enjoys solving problems and delivering outstanding software products to end users.
Portfolio
Experience
- C# - 13 years
- GIS - 8 years
- Desktop App Development - 7 years
- ASP.NET Core - 6 years
- Microsoft SQL Server - 6 years
- API/Services Architecture - 6 years
- Azure - 6 years
- Docker - 3 years
Work Experience
Software Engineer and Consultant
Self-employed
- Managed a team of front- and back-end developers and QA to automate the business plans for small and medium-sized businesses.
- Integrated several products with the global payment system Stripe.
- Consulted the US-based startup company to scale 1:100.
- Helped a retail company improve and Dockerize several microservices to enable using Terraform in AWS.
- Founded several startups and led the technical teams from requirements to deployment (CD).
.NET Core Back-end Developer
Resident Advisor Tickets Ltd
- Implemented real-time data synchronization from heterogeneous SQL databases into PostgreSQL via Debezium connectors.
- Developed a background cron job in .NET Core to automate Google Feed API integration, processing real-time ticket availability feeds that directly drove increased marketplace conversion and ticket sales.
- Automated infrastructure provisioning and deployment to AWS using Terraform, defining reproducible Infrastructure as Code (IaC) configurations for consistent environment setups.
Full-stack C# Developer
Endpoint Clinical
- Developed a fully cloud-native app in Azure using serverless architecture (Azure Functions and Durable Functions), messaging (Service Bus and Event Grid), and a NoSQL database (Cosmos DB).
- Implemented an event-driven architecture to handle large-scale data.
- Integrated an AI chatbot using the RAG system for support and an AI assistant for project overview/task/story explanation.
- Implemented ETL and leveraged Azure Data Factory and Databricks to report statistics.
Back-end .NET Developer | Civil 3D Integration
BoreDM LLC
- Developed a WPF (with MVVM) plugin app for Civil 3D to render data in 2D and 3D formats.
- Optimized the API service to efficiently handle high-load data, improving performance by 20%.
- Provided strategic consulting on efficient business planning and deployment.
Lead ArcGIS Developer
DripDrop Marketing
- Created a map that displays past, current, and potential clients.
- Integrated the map with Placer.ai to show potential marketing areas.
- Tracked and fixed bugs using Jira as a reporting tool.
Senior Software Engineer
ScaleUp Finance
- Played a key role in the advancement of a CFO as a service startup.
- Analyzed and optimized the system's critical path, resulting in a substantial 90% reduction in operational time.
- Created APIs to connect seamlessly with external services such as e-conomic, Xero, Twilio, Stripe, etc.
- Leveraged various Azure services, including Blob Storage, Event Grid, Service Bus, Functions (HTTP Trigger, Queue Trigger, Timer Trigger, Durable Functions), Application Insights, and Cognitive Search.
Visual Basic Developer
DOROTHEE MANTEAU
- Developed an app that reads AutoCAD files and makes them readable for humans. Enabled the end user to update texts and convert the files to AutoCAD format.
- Designed the app to be responsive while reading and converting big files using async operation.
- Added unit tests, which covered 85% of the whole project.
C# and .NET Developer
MySmartHeart AG
- Developed an app that monitors the user's ECG data saved in special devices.
- Consulted the CTO on how to design the whole system, which should be scalable.
- Used Azure services like BlobStorage and Functions to make the product more reliable.
Team Lead
xCritical Software
- Improved the trading CRM product, which had more than 50 microservices.
- Led several microservices in ASP.NET Core from the requirements to the deployment stages.
- Improved the logging mechanism in all microservices and integrated them with the ELK.
- Fixed the integration issues with 3rd-party services such as call centers, AML and KYC service providers, and mail campaign services.
- Helped others deliver solutions by mentoring or reviewing their code.
- Participated in improving the CI/CD pipeline on TeamCity.
Senior Software Engineer
R.I.S.K.
- Led the development of web services in ASP.NET Core integrated with Azure.
- Refactored projects to make the code testable by writing tests.
- Used ORMs such as Entity Framework Core and NHibernate with SQL Server, MySQL, SQLite, and PostgreSQL databases.
- Leveraged parallel processing and async programming in C# to improve the app's responsiveness and maximize performance.
- Created the GIS apps based on ArcObject (ArcGIS) using C#.
Software Engineer
R.I.S.K.
- Developed a standalone plug-in responsive desktop (WinForms and WPF) of GIS applications using ArcObjects in C#.
- Supported legacy apps written in languages such as Delphi, VB 6, VBA, VB.NET, and C#.
- Managed the automatic creation of a database in PostgreSQL based on XSD files and a data provider for reading and writing.
- Involved in implementing the SOA approach using different languages like C, Delphi, and C# to make calculations for GIS-based air navigational apps.
- Developed several plugins/tools for Excel/Word with VBA (macros).
Project History
LinkPay
We used MS SQL Server for data storage, configured the CI on GitHub, and conducted deployment on premise.
Duello
4Rest
Social App for the Trading Lovers
RESPONSIBILITIES
• Introduced Azure functions to make some logic in the serverless
• Fixed issues in the parser of social media like YouTube, Twitter, Reddit, news, etc.
• Used Azure Blob Storage, Azure Key Vault, and Azure Storage Queue to scale up the system, as well as Azure Functions to make it serverless.
Automation of Business Plans
Payment Gateway
Repsly
Education
Master's Degree in Informatics and Applied Mathematics
Baku State University - Baku, Azerbaijan
Bachelor's Degree in Informatics and Applied Mathematics
Azerbaijan State Oil and Industry University - Baku, Azerbaijan
Skills
Libraries/APIs
REST APIs, Azure Blob Storage API, ArcGIS, Windows Forms (WinForms), Azure API Management, SignalR, React, Authorize.net, Node.js, Vue 3, Stripe API, ArcGIS JavaScript API 3, Google Maps API (GeoJSON), Cosmos API, Civil 3D
Tools
GIS, RabbitMQ, Azure Key Vault, Azure App Service, ArcMap, ArcObjects, C#.NET WinForms, SendGrid, Firebase Cloud Messaging (FCM), HashiCorp, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), Git, AutoCAD Civil 3D, AutoCAD, Autodesk, CAD, Auth0, ELK (Elastic Stack), TeamCity, Azure Application Insights, Terraform, Kafka Connect, Kafka Streams
Languages
SQL, C#, Transact-SQL (T-SQL), C#.NET, JavaScript, VB.NET, Visual Basic .NET (VB.NET), GraphQL, Delphi, Excel VBA, XAML, Delphi 7, Visual Basic, Visual Basic for Applications (VBA), PHP, Python, TypeScript, HTML, Visual Basic 6 (VB6), Arc, C++, CSS
Frameworks
.NET, Windows Presentation Foundation (WPF), ASP.NET Core, Entity Framework Core, Razor Pages, JSON Web Tokens (JWT), .NET Core, ASP.NET MVC, ASP.NET, .NET 4, Angular, ASP.NET Web API, VB.NET WinForms, ASP.NET Core 6, ASP.NET Core 7, Blazor, React Native, Cosmos SDK, Next.js
Paradigms
Test-driven Development (TDD), Microservices, Unit Testing, API/Services Architecture, REST, Desktop App Development, Microservices Architecture, Event-driven Architecture, CQRS, Model View ViewModel (MVVM), Event Sourcing, Serverless Architecture, DevOps, Agile, Scrum
Platforms
Azure, Azure Functions, Windows Desktop, Docker, Amazon Web Services (AWS), Twilio, AWS Lambda, ArcGIS Server, Azure AI Search, Kubernetes, Telerik, Xamarin, Databricks, Debezium, Apache Kafka, Confluent Kafka
Storage
PostgreSQL, Azure Queue Storage, Microsoft SQL Server, PostGIS, Azure Cosmos DB, MongoDB, Amazon S3 (AWS S3), NoSQL, SQL Server 2016, Azure Table Storage, Azure SQL, Redis Cache, Azure Storage, MySQL, Redshift, Database Architecture
Other
API Design, Software System Architecture Development, Windows Communication Foundation (WCF), Cross-functional Team Leadership, Remote Team Leadership, Team Leadership, Contract Testing, Pact, Authentication, Back-end Development, Customer Relationship Management (CRM), Minimum Viable Product (MVP), Full-stack, APIs, Azure Durable Functions, Azure Event Grid, Azure ServiceBus, Desktop App, RESTFul APIs, SQL Server, Event-driven Systems, Domain-driven Design (DDD), Solution Architecture, SaaS, CI/CD Pipelines, IIS, Software Architecture, Azure Service Bus, GitFlow, Data Scraping, Web Scraping, Security, Technical Leadership, Azure Data Factory (ADF), Okta, Fintech, Finance, Distributed Systems, Intuit QuickBooks, Full-stack Development, Healthcare Software, Know Your Customer (KYC), Containerization, Infrastructure as Code (IaC), Parallels Business Automation, API Integration, GeoJSON, Azure Databricks, Research & Critical Thinking, Back-end, Civil Engineering, Azure Blob Storage, GitHub Actions, RESTful Microservices, RAG Systems, Large Language Models (LLMs), AI Agents, Strimzi
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