Максим

Maksym Paliy
Junior .NET Developer — Backend, Full-Stack & AI / LLM Integration
Lviv, Ukraine · [open contact info](look above in the "contact info" section) · github · LinkedIn

SUMMARY
Backend, FullStack - focused .NET developer with about one year of hands-on experience building and shipping full-stack applications on
ASP.NET Core (.NET 8/9) — API and data layer, React frontend, Docker delivery. I design with Clean / layered architecture over EF Core,
PostgreSQL and MongoDB, and I care about production hardening: auth, rate limiting, input sanitization and secrets management (I
rewrote a live website's backend to close its vulnerabilities). Recent focus: integrating LLMs with Microsoft.Extensions.AI using function /
tool calling and guardrails.

EXPERIENCE
Software Engineering Intern — SoftServe 2025 · 3 months SoftServe — one of Ukraine's largest IT companies · Lviv
• Completed a 3-month engineering internship: hands-on .NET / C# development inside a team using a real workflow — Git, code review,
task tracking and Agile ceremonies.
Backend Developer — Freelance & Open-Source (part-time) 2025-2026 – Present BEST Lviv organization + personal
products · Lviv / remote
• BEST Lviv (live production site, real users) — rewrote the backend into a layered .NET 8 API (Controllers / Services / Repositories /
Infrastructure) on MongoDB, with content synced from Notion and media stored in MinIO (S3-compatible). • Hardened it for production:
API-key auth with constant-time comparison, per-IP rate limiting, HTML sanitization (anti-XSS), an SSRF-safe image fetcher, strict CORS,
secrets in user-secrets, and global exception handling (ProblemDetails).
• TaroSideAI (shipped full-stack product) — designed a 4-layer Clean Architecture backend (.NET 9) with a React + TypeScript SPA;
integrated an LLM via Microsoft.Extensions.AI so the model must call a DrawTarotCards tool that reads real data from PostgreSQL,
eliminating hallucinated output.
• Enforced tariff limits at the tool level: when a user's quota is spent the AI tool is not attached to the request, so limits cannot be
bypassed by prompt injection. ASP.NET Identity + JWT; EF Core migrations & seeding; Swagger.
TECHNICAL SKILLS
Languages: C#, SQL, JavaScript / TypeScript, HTML, CSS, Python
Backend & APIs: ASP.NET Core (Web API & MVC), .NET 8/9, EF Core, ASP.NET Identity, REST API design, Clean Architecture, Repository /
Unit of Work, DI, AutoMapper, FluentValidation
AI / LLM: Microsoft.Extensions.AI, function / tool calling, prompt design & guardrails, local inference (Ollama)
Security & Reliability: JWT & API-key auth (constant-time), rate limiting, XSS sanitization, SSRF-safe HTTP, secrets via user-secrets,
ProblemDetails error handling, health checks
Data & Storage: PostgreSQL, MySQL, MS SQL Server, MongoDB, MinIO / S3
DevOps & Tools: Docker, Docker Compose, Git / GitHub, Swagger / OpenAPI, Google Cloud (Cloud SQL), Postman, Rider, Visual Studio
Frontend: React, TypeScript, Vite, Bootstrap
PROJECTS
Hotel Booking System — layered ASP.NET Core MVC app github.com/Msk3123/HostelSite • Layered MVC app (Domain /
Application / Infrastructure) with Razor views and an admin panel for full CRUD over hotels, rooms and bookings; role-based access via
ASP.NET Identity (Admin / Client).
• Repository + Unit of Work and AutoMapper over EF Core (MySQL); fully containerized with Docker Compose, migrations applied on
startup, database on Google Cloud SQL.
CompanyEmployees API — multi-project REST Web API github.com/Msk3123/CsWebAPi • Multi-project REST API with full
CRUD, DTOs + AutoMapper, a repository abstraction, global exception-handling middleware and structured logging (NLog).
LEADERSHIP & COMMUNICATION
• BEST Lviv (international student organization) — Corporate Relations at the Engineering Job Fair: pitched the event to companies and
coordinated partners, translating technical value to non-technical decision-makers. Also HR (team of 11, 6 months) and CTF event
logistics.
EDUCATION
Lviv Polytechnic National University 2023 – 2027 BSc, Computer Engineering — Institute of Computer Technologies,
Automation and Metrology
LANGUAGES
Ukrainian — native · English — Intermediate (B1)