summary

Backend developer building APIs and working with infrastructure on AWS - from PayPal and DAFpay integrations to legacy refactoring into modern services on ECS Fargate and EC2. Looking for backend and devops work, a modern stack and AI-assisted workflows.

Experience

RemSoft.Dev - Middle ASP.NET + SQL Developer

Sep 2024 - Present

Fundraising platform for 5,000+ nonprofits and 4M donors.

  • Replaced manual releases with two-stage CI/CD and tracked SQL migrations, split between CodeDeploy to EC2 and ECR to ECS Fargate with OpenTelemetry

  • Owned DAFpay integration from estimate to production, with HMAC verification and idempotent webhooks

  • Developed fee reconciliation over PayPal Classic API (NVP and SOAP) on EF6, recovering 60-100 donations that had taken 3-4 hours to backfill by hand monthly, plus an admin API that cleared 8 years of backlog

  • Extracted email and file handling into standalone minimal Web API services, orchestrated locally with Aspire, adding provider-agnostic fallbacks and moving storage to S3 with CDN and access-checked streaming

  • Drove legacy minimization and hardening - .NET 4.5 to 4.8, 25 projects down to 7, builds 3x faster - unifying unit testing, rebuilding CSRF protection and input sanitization, and moving secrets to AWS Secrets Manager

  • Initiated team-wide Claude Code adoption, with conventions and MCP servers for Jira, SQL Server and Git

MeetPoint - Full-stack Developer

Aug 2023 - Jul 2024

Non-commercial team project - meetup planner.

  • Built the backend as an ASP.NET Core Web API on clean architecture, with PostgreSQL and EF Core, JWT auth over ASP.NET Identity, a SignalR Redis backplane and Docker Compose for local runs

  • Integrated Google Maps APIs into the Angular frontend, computing distances locally to avoid repeat calls

Projects

Claude Code multi-repo knowledge system - GitHub

Jul 2026

Agentic development workspace for a legacy multi-repo .NET codebase.

  • Authored, benchmarked and iterated 11 skills for explore, review and QA workflows

  • Cached codebase facts and pitfalls in staleness-checked maps, with a Python grader, linters and deny rules

ETL CLI tool - GitHub

Jul 2024

Console tool for preprocessing and bulk-importing large datasets into SQL Server.

  • Implemented streamed CSV import with CsvHelper and FastMember, without loading files into memory

  • Designed preprocessing and SqlBulkCopy load into a SQL Server schema with computed columns and indexes

Skills

  • Backend: C#, .NET 10, ASP.NET Core (Web API, MVC, Razor), Aspire, .NET Framework 4.x (Web Forms)

  • Databases: SQL Server (T-SQL), EF Core, PostgreSQL, Redis

  • Integrations: payments (PayPal, DAFpay, Stripe), email (Mailgun, SMTP), REST, SOAP, NVP, webhooks

  • Infrastructure: AWS (ECR, ECS (Fargate), EC2, S3, Secrets Manager, CloudWatch), OpenTelemetry

  • CI/CD and testing: Bitbucket Pipelines, AWS CodeDeploy, Docker, xUnit, NUnit, Moq, Postman

  • AI tooling: Claude Code, MCP servers, agent workflow automation (hooks, custom skills, codebase maps)

  • Frontend: TypeScript, Angular (RxJS), JavaScript, AngularJS, jQuery

Education

Bachelor of Software Engineering, Faculty of Applied Mathematics

2021 - 2025

National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"