ASHISH SONAR
Principal Engineer | .NET Core | AWS Cloud Architecture
Jalgaon
Summary
Dynamic Principal Engineer with over 14 years of experience in delivering scalable, high-performance web, desktop, and ERP applications. Expertise in .NET Core (3.1–8), C#, ASP.NET Core Web APIs, and AWS cloud-native architectures, complemented by strong skills in backend engineering and secure payment integrations (Stripe, Xero). Proven track record includes modernizing legacy systems, architecting multi-tenant ERP platforms, and leading teams to create reliable, future-ready applications across diverse sectors including Sports, Pharma, Finance, and Enterprise. Proficient in CI/CD automation and designing integrations that ensure seamless scalability and cost-effective cloud solutions while adhering to GDPR compliance.
Overview
15
15
years of professional experience
3
3
Languages
3
3
Certificates
Work History
Lead Software Developer → Principal Engineer
Ampity Infotech Pvt Ltd
11.2022 - Current
- Project: Web Application Infrastructure for a Sports Domain
- Team Sport Admin - TSA (Sports Domain)
- The project is all about sports event management, such as camps, tournaments, etc. The application basically has three types of logins: Application Admin, Organization Admin, and Player. The application consists of various modules, such as Payments, Players, Events, Organization, and Teams, etc.
- Technical Environment: C#.NET, ASP.NET Core, Entity Framework Core, Angular, Web API, Identity Server, LINQ, MVC, Bootstrap, MySQL, Visual Studio 2022, Visual Studio Code, Git, AWS, JIRA, XERO, STRIPE, PLAID, SENDGRID, DOCUSIGN.
- Roles and Responsibilities:
- Analysis and Requirements:
- Communicated with clients to gather and clarify technical and functional requirements.
- Attend the client call to discuss the sprint progress and planning.
- .NET Back-End Development:
- Designed and developed new features and enhancements using .NET Core, Web API, C#, and related frameworks, following the design patterns.
- Provided maintenance and support for .NET applications, ensuring stable operations.
- Integrated third-party services, including Xero, Stripe, and other APIs.
- Consumed Stripe and DocuSign WebHooks within the application to support event-driven processes, and ensure accurate real-time data handling.
- Applied soft delete functionality and global filter throughout the application for deleted records.
- Migration:
- Migrated applications across framework versions: .NET Core 3.1 → 6.0 → 8.0.
- Migrated Identity Server from AWS Elastic Beanstalk to IIS on EC2.
- Migrated DocuSign legacy authentication to OAuth 2.0 for improved security and compliance
- AWS:
- Developed an AWS Step Functions-based background job to automate periodic invoice syncing from the application to Xero for each connected tenant, significantly improving accuracy, and reducing manual effort.
- Monitored triggered alarm and API error logs to resolve issues promptly.
- Monitored and validated daily, recurring payment processes.
- Deployment/Release:
- Executed end-to-end deployment activities across QA, UAT, and Production environments.
- Maintain release versions according to the sprint.
- Database:
- Architected the database schema for handling the integration of third-party services and financial transactions, and invoices generated.
- Performed data fixes and updates in the database as required.
- Maintained and optimized MySQL database performance.
- Generated custom reports and exported data to Excel.
- Prepared an ER diagram for various modules: Payments, Event Registration, User/Admin login, Player, etc.
- Coordination and collaboration:
- Coordinated with managers for sprint planning and resource scheduling.
- Collaborated with the Looker team to prepare and refine report queries.
- Assisted and supported team members with their technical tasks.
Sr. Software Developer
NLI HealthCare
03.2020 - 11.2022
- Project: Web Application Infrastructure for a Pharma Domain.
- ERP (Pharmaceutical Domain)
- The project is to build a cloud-based SaaS ERP web application in the pharmaceutical and healthcare domains (GDPR compliance), hosted on IIS in AWS. which has Employee Management, Security and Administration, Procurement, and Production processes, etc. modules. This is a multi-tenant application having multiple clients on a single instance.
- Technical Environment: C#.NET, ASP.NET Core, Entity Framework Core (DB First), React, Material UI, Web API, Identity Server, LINQ, MVC, Bootstrap, Syncfusion, SQL Server, Visual Studio 2019, Visual Studio Code, Azure DevOps, AWS, JIRA, and Confluence.
- Role and Responsibilities:
- Developed and implemented authentication and security features.
- Developed and implemented role-based authorizations.
- Developed and implemented (GDPR) for employee management.
- Designed, developed, and implemented a license management system.
- Implemented LINQ for querying, sorting, and filtering the database.
- Collaborated with the UI designer and the Database Administrator to enhance the application.
- Hosted the application in IIS on an AWS EC2 instance.
- Designed and developed some database-related activities.
- 1. Understanding the client's requirements.
- 2. To analyze, design, and develop the Security, Administration, and Employee Management modules.
- 3. Primarily responsible for hosting, deployment, and onboarding the application.
- 4. Involved in database-related activities also.
- 5. To support and guide team members.
- License Management.
- This is a cloud-based web application that handles generating, renewing, and managing client licenses.
- Technical Environment: C#.NET, ASP.NET Core, Entity Framework Core (DB First), React, Material UI, Web API, Identity Server, LINQ, MVC, Bootstrap, Syncfusion, SQL Server, Visual Studio 2019, Visual Studio Code, Azure DevOps, AWS, JIRA, and Confluence.
- Role and Responsibilities:
- 1. Analyze and develop the process flow.
- 2. Primarily responsible for designing the application wireframes, developing, resolving bugs, and unit testing.
- 3. Involved in database-related activities also.
-
- Regulatory Management and Approval.
- This web application manages vaccine and drug regulatory approval submissions. This application has three specific modules, namely Human Capital Management (HCM), Document Change Control (DCC), and Regulatory Management and Approval (RMA). The DCC system allows you to truly manage your documents with reports, dashboards, and electronic signatures, thereby maintaining compliance and increasing profitability. The RMA module digitizes, automates, and connects your regulatory management environment on a single platform to improve collaboration, increase accuracy, and simplify template management for various regulatory agencies, e.g., FDA, EMA, etc.
- Technical Environment: C#.NET, ASP.NET Core, Entity Framework Core (DB First), React, Material UI, Web API, Identity Server, LINQ, MVC, Bootstrap, Syncfusion, SQL Server, Visual Studio 2019, Visual Studio Code, Azure DevOps, AWS, JIRA, and Confluence.
- Role and Responsibilities:
- 1. Understanding the client's requirements.
- 2. Application design, development, bug fixing, peer code reviews, and unit testing.
- 3. Primarily responsible for hosting, deployment, and onboarding the application.
- 4. Involved in database-related activities also.
Sr. Software Developer
Vaneera
03.2011 - 01.2020
- Project: Desktop Application for a Pharma Domain
- ERP:
- This is a horizontal ERP product for pharmaceuticals built in. WCF and WPF products have a total of around 30 modules, with standard Crystal Reports for every section. This is completely service-oriented architecture. Product features are as follows.
- Production Planning and Inventory Control (PPIC)
- Product Family -> Product Recipe -> BOM (Bill of Material) -> Product Formula -> Material Requisition -> Weighable
- Work Order Request (WOR)
- Create a Work Order -> Department Approval -> QA Approval -> Work Done -> Work Review -> Assessment -> Final Approval -> WOR close.
- Asset Management.
- Formula Management (Tablet, Liquid, Ointment)
-
- Technical Environment: C#.NET, ADO.NET, WPF, WCF, Crystal Reports, Visual Studio 2017, TFS, QC, MS Office, and SQL Server.
- Role & Responsibility:
- To develop and unit test the material management, production, and HR module of this project.
- To design and develop the database and its functionalities.
- Designed and developed Windows Forms (GUI) using C#.NET.
- Used Windows UI (XAML) to modernize and mobilize WinForms.
- Designed and developed a database of various modules.
- Created stored procedures, functions, views, and queries.
- Used cursors and user-defined table types.
- I worked on the Crystal and RDLS reports.
- I also worked on the remoting concept.
- 2: ERP .Net Remoting
- This is Horizontal ERP product for Pharmaceuticals built in .Net Remoting, Product has total 14 Sections with standard Crystal Reports for every section. This is completely service Oriented Architecture. Product Features are as follows.
- Inventory Management system.
- Quality Assurance.
- Quality Control.
- Production Planning and Inventory Control
- Administration + HR Support
- Marketing (Customer Product Specification, Sales and Campaign information)
- Technical Environment: C#.NET, ADO.Net, .Net Remoting, Crystal Reports, Visual Studio 2010, TFS, QC, MS Office and SQL Server
- Role & Responsibility:
- To Develop and test the various modules of this project.
- To Design and develop Database and the functionalities
Education
MCA - Comp.
B.Sc. - Comp.
Skills
Programming Languages: C#, VBNet
Servers: IIS, Configuration, Hosting & Deployment
Project / Work Management : JIRA, Confluence
Third-Party Integrations: Xero, Stripe, Plaid, SendGrid etc
AWS Cloud Services: EC2, S3, IAM, VPC, Lambda, Step Functions, Route 53, API Gateway, CloudWatch, RDS, Aurora, ElastiCache, ALB, SQS, SNS,SecretManager & ParameterStore etc
CICD: AWS Code Pipeline,GitHub
Source Control: GIT, DevOps
Database Technologies: SQL Server, MYSQL,Entity Framework Core, ADONET, LINQ, DynamoDB
Frameworks: NET, NET Core 31, 6 & 8
Web Development: ASPNET Core, Web API, Web Hook, MVC
Windows Application Development: Win forms, WPF
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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LANGUAGES
Marathi: Native language
English: C1 Advanced
Hindi: C1 Advanced
Timeline
Lead Software Developer → Principal Engineer
Ampity Infotech Pvt Ltd
11.2022 - Current
Sr. Software Developer
NLI HealthCare
03.2020 - 11.2022
Sr. Software Developer
Vaneera
03.2011 - 01.2020
MCA - Comp.
B.Sc. - Comp.
Certification
AWS Partner: Accreditation (Technical)
Core Strengths
- Cloud Expertise: EC2, S3, IAM, VPC, RDS, Aurora, DynamoDB, Lambda, ECS, Step Functions, API Gateway, CloudWatch, CloudFormation, CodePipeline, GitHub Actions
- Architecture & Engineering: Distributed systems, microservices, backend architecture, ERP platforms
- Integrations: Stripe, Xero, custom payment flows
- Compliance & Quality: GDPR, secure coding, performance tuning
- Leadership: Mentoring teams, driving technical strategy, aligning engineering with business goals
- Having Good communication skills, dedication to assigned work, and being interested in resolving complex issues. Maintains consistency with deliverables.