Software Engineer Development

Resume of Chandrasiri S.A. Page * of *

Chandrasiri Saparamadu Arachchige

** ********** ***, ***, *******, MA 02150

Tel: 857-***-**** Email: ************@*****.***

Summary

Innovative Full-Stack Software Engineer and DevOps Specialist with extensive expertise in software development, AI/ML integration, data engineering, and IT infrastructure. Proven track record in designing scalable, cost-effective solutions and optimizing CI/CD pipelines using agile methodologies. Adept at leveraging technologies including .NET Core, C# (C Sharp), Python, React, SQL (Structured Query Language), and Azure to drive digital transformation in educational and corporate environments.

Education

Master of Science in Software Development January 2025 Boston University, USA

Bachelor of Information Technology March 2009

University of Colombo, Sri Lanka

Professional Experience

Focus Insite, West Chester, PA Aug 2024 – Present Full-Stack Software Engineer AI Developer

• Project Ownership & Leadership: Spearheaded full-cycle software development from requirements analysis and system architecture to deployment and support, ensuring alignment with business objectives.

• Technical Architecture & Development: Designed and built scalable web applications using

.NET Core 7/8/9, C#, Python, React, TypeScript, SQL Server, PostgreSQL, RESTful and FastAPI, following Clean Architecture, SOLID principles and modern design patterns.

• AI-Driven Solutions: Engineered AI agents for participant screening, email campaigning and predictive models for bid automation optimization.

• DevOps & Automation: Streamlined CI/CD pipelines using GitHub Actions, Docker, and Azure, boosting deployment speed and reliability.

• Domain & Branding Integration: Managed Cloudflare DNS, custom domains, and subdomain routing; integrated branded domains with Google OAuth and LinkedIn, improving security and user trust.

• Quality Assurance: Employed Test-Driven Development (TDD) and rigorous code reviews to maintain high software quality.

• Documentation & Training: Developed comprehensive project documentation and provided user training to ensure seamless adoption.

Resume of Chandrasiri S.A. Page 2 of 5

Key Projects

1. Participant Portal for Research Study Recruitment (May–June 2025) Technologies: Clean Architecture, React, TypeScript, Material UI (MUI), ASP.NET Core 9, C#, PostgreSQL, RESTful APIs, JWT, EF Core, Serilog, GitHub, Azure, CI/CD

• Designed and implemented a secure, user-friendly portal for research study participants to manage their profiles, view upcoming projects, and apply to relevant studies.

• Developed the frontend using React and MUI with a responsive, dashboard-style layout supporting mobile-friendly drawer menus and dynamic profile data rendering.

• Built secure backend APIs with ASP.NET Core 9 and EF Core, enforcing role-based access control, JWT-based authentication, and profile step tracking logic.

• Integrated centralized identity system for seamless login, token refresh, and protected API access.

• Implemented profile registration workflows with conditional fields, dynamic form sections, health/lifestyle data collection, and encrypted storage of sensitive information.

• Applied industry-standard PII protection strategies, including field-level encryption, secure cookies, and access logging.

• Enabled modern UX enhancements including badges, animated completion rewards, and auto-filled demographic forms for higher engagement and data quality. 2. Central Identity System for Enterprise Application Security (May 2025) Technologies: Clean Architecture, React, TypeScript, ASP.NET Core 9, C#, PostgreSQL, RESTful APIs, MUI, JWT, GitHub, TLS, Identity, Serilog, EF Core, Azure, CI/CD

• Designed and implemented a secure, centralized identity system to manage authentication and authorization across multiple enterprise web applications.

• Developed frontend in React with MUI and backend in ASP.NET Core 9 using JWT-based authentication and refresh tokens.

• Followed PII and data protection best practices including encryption, secure token flows, and audit logging.

• Enabled Google OAuth, CAPTCHA, token refresh logic, and secure logout using context- based auth flows in the React client.

• Enforced transport-level security and created a future-ready architecture supporting SSO and microservices integration.

Resume of Chandrasiri S.A. Page 3 of 5

3. Email Blaster System for Campaign Automation (Mar–May 2025) Technologies: ASP.NET Core 8, PostgreSQL, EF Core 9, RESTful APIs, React, JavaScript, Quartz.NET, SendGrid, Twilio, JWT, AES Encryption, Serilog, CI/CD, Azure App Service

• Designed and implemented a scalable email and SMS campaign system integrated with enterprise databases and participant data.

• Developed backend API using ASP.NET Core with secure handling of email queues, templates, and recipient segmentation.

• Built automation using Quartz.NET to schedule and execute bulk campaign jobs with status updates and retry mechanisms.

• Implemented secure message delivery using SendGrid and Twilio APIs with compliance- focused logging and tracking.

• Created React-based admin interface to manage campaigns, preview content, monitor live status, and track delivery results.

• Applied robust security practices including JWT-based authentication, role-based access control, and AES encryption for PII.

4. Automated Survey Creation for Research Participant Recruitment (Jan-Feb 2025) Technologies: AI/ML, Python, C# (C Sharp), .NET Core, .NET Core, React, BS, EF Core, SQL

(Structured Query Language) Server, RESTful APIs, Fast APIs, Azure, GitHub

• Designed and implemented a full-stack web application to automate dynamic screener/survey form generation for research recruitment.

• Integrated AI/ML techniques for question extraction and digital form creation, enhancing data accuracy and user engagement.

• Engineered robust data pipelines and SQL database structures to efficiently store, process, and analyze applicant responses.

5. SharePoint Integration and Data Extraction System (January 2025) Technologies: AI/ML, Python, Pandas, NumPy, C# (C Sharp), .NET Core, ASP.NET Core, React, EF Core, SQL (Structured Query Language) Server, RESTful APIs, FastAPI, Graph API, Azure, GitHub

• Developed an end-to-end solution to extract and consolidate demographic data from 42,000+ Excel files stored in SharePoint (2016–2024).

• Utilized natural language processing (NLP) for context-aware column mapping, standardizing over 3,500 inconsistent column names.

• Optimized processing pipelines with batch and parallel techniques, reducing runtime from 36 hours to under 45 minutes.

Resume of Chandrasiri S.A. Page 4 of 5

6. FocusPro BidAgent - AI based Bid automation system (December 2024) Technologies: AI/ML Python, C#, .NET Core, React, EF Core, SQL(Structured Query Language), RESTful APIs, Fast API, Unicorn, Azure App Service, Linear Regression, Random Forest, GridSearchCV, Azure, GitHub

• Developed an intelligent bid automation platform to optimize pricing decisions using predictive modeling and dynamic pricing strategies.

• Created a RESTful API delivering real-time bid predictions, integrating advanced feature engineering and data analytics.

7. Project Management & Communication Automation System (Aug 2024 – Nov 2024) Technologies: AI, ASP.NET Core, C#, RESTful API, TDD, EF Core, .NET Core Identity, Azure SQL(Structured Query Language), Graph API, Twilio API, WebRTC, AMD, CNAM, Quartz.NET, React, GitHub, CI/CD

• Designed and implemented a centralized system for project and participant management to streamline research recruitment processes.

• Automated communications through integrated email, and SMS (via Twilio and Graph API),with a real-time browser-based click-to-call system improving operational efficiency by over 80% and communication cost by 70%.

• Leveraged AI algorithms for automated participant onboarding and real-time dashboard updates.

EARLIER EXPERIENCE

Wisdom Institute, Kalutara, Sri Lanka 2008–2023

Software/Solution Engineer and ICT Lecturer

• Led digital transformation initiatives, including the development of online education platforms and smart classroom technologies.

• Designed and developed customized systems such as an online teaching, learning and management platform, office automation system to enhance educational infrastructures .

(using .NET Core, C#, jQuery, BS, EF Core, SQL, BBB, Telerik, Linux hosting, DNS, Git Hub)

• Designed and developed a lecture room management system for the University of Kelaniya. (using .NET Core, VB Net, C#, jQuery, BS, EF Core, SQL, Telerik, Linux hosting, DNS, Git Hub)

• Taught ICT subjects to students aged 12–21 and contributed to institutional strategy as a co-founder and director.

Resume of Chandrasiri S.A. Page 5 of 5

WorldVision Sri Lanka, Sri Lanka

National IT Coordinator (2007–2008) IT Helpdesk Coordinator – Lanka Tsunami Response Team

(2005–2007) IT Helpdesk Engineer (2002–2005)

• Managed IT operations, including network installations, troubleshooting, and user training.

• Supervised hardware/software support to ensure uninterrupted operations across district offices.

SKILLS

Technical Skills:

• Programming Languages: C#, Python, Java, SQL Server, PostgreSQL, JS, HTML, CSS

• Frameworks & Technologies : .NET Core, ASP.NET Core, EF Core, React, TypeScript, Bootstrap, jQuery, Kendo UI, MUI, RESTful APIs, FastAPI, Uvicorn

• DevOps & Cloud: CI/CD, Azure, GitHub, Docker, Kubernetes

• AI/ML & Data Science: Hugging Face Transformers, LLaMA, OpenAI API, LangChain, Scikit-learn, Pandas, NumPy, Matplotlib, Seaborn, XGBoost, PyTorch, NLP, Predictive Modeling

• Cloud & DevOps: Azure, GitHub, CI/CD, Docker, Kubernetes, Azure DevOps

• Web & Branding Infrastructure: Domain provisioning, subdomain setup, SSL via Cloudflare, branded domain integration with Google OAuth, LinkedIn App Integration

• Tools: Visual Studio, VS Code, Jira, Scrum, Agile methodologies, Crystal Reports, BigBlueButton, Microsoft Graph API, Twilio, Quartz.NET

• IT Infrastructure: DNS, Networking, Cloud Computing, Virtual Desktop Systems, Smart Classroom Technologies, Security/Surveillance Systems Soft Skills:

• User Training & Support, Team Coordination, IT Project Management, Technical Documentation, Strategic Planning

ADDITIONAL INFORMATION

• Affiliations: IEEE Member, Red Cross Volunteer, BU Affiliated

• Languages: Fluent in English and Sinhalese

Contact this candidate