Freelance (Hourly) Full‑stack Developer (.NET Core + React/Next.js)

Company Description

Leptes is a software development company serving EU clients. We build modern web apps primarily on .NET Core, SQL Server, React and Next.js.

Engagement & Location

• Type: Long‑term freelance / contractor (hourly)
• Hours: 20–40 h/week (flexible) with 3–4h overlap with CET
• Location: Remote (Turkey)
• Start: ASAP

Compensation & Invoicing

• Rate: Hourly Rate + TR VAT (KDV)
• Invoicing: Monthly (TR invoice required). Payments via bank transfer/Wise.

What you’ll do

• Design, develop and maintain .NET 6–9 backend services and REST APIs.
• Build responsive UI with React (Hooks + Redux) and TypeScript; contribute to Next.js features (SSR/App Router, API routes, Auth.js/NextAuth).
• Work with Entity Framework Core and SQL Server (schema design, queries, tuning).
• Write clean, testable code; participate in code reviews and follow Git/CI/CD practices.
• Collaborate with PMs/designers, refine requirements, estimate tasks and deliver iteratively.

Must‑haves

• 4+ years work experience as full-stack development
• 4+ years in .NET (C#, .NET 6–9, EF Core, .Net MVC).
• 2–4+ years building SPAs with React and 2+ years with TypeScript.
• Azure development environment (DevOps, Entra, BlobStorage, etc.)
• Solid SQL skills on MSSQL.
• Working English (B2+) for daily standups and async written communications
• Must be located in Türkiye
• Candidates must be able to issue invoices for their work.

Nice to have

• Experience with testing (xUnit/Jest), performance profiling, and caching
• Next.js experience (SSR, App Router, API routes; Auth.js/NextAuth).
• Knowledge of Azure AI (Open AI, AI Foundry)
• DevOps basics (Docker, CI/CD).
• Legacy front‑end exposure (jQuery/AJAX) for maintenance cases.
• Security/GDPR awareness.