Senior .NET Core Engineer

**仕事内容:** We operate and develop a growing social media network and digital platforms used internationally. Our work focuses on building, modernizing and maintaining reliable web applications that support content distribution, user interaction, and internal tools. As a **Full\-Stack Engineer**, you will be responsible for developing web\-based interfaces using **.NET Core.** You also know **JavaScript, HTML, CSS, SQL\-Server and APIs**. You will modernize old systems from scratch, work on responsive, user\-facing features, improve usability and performance, and collaborate closely with designers and engineers. The role is **fully remote** and offers a **flextime working style** with no core hours. You are expected to manage your own schedule while delivering maintainable and documented code. **Key responsibilities:** * Develop in ASP.NET‑Core Systems * Collaborate with designers and other developers * Improve performance, code quality, and maintainability * Participate in feature planning and technical discussions **Required skills:** * A **very good experience** in **.NET.** * Understanding of modern web development practices * Ability to work independently in a remote environment This is a full\-time position with long\-term potential. Our system has existed for over 25 years, so this is a very secure job offer with good and relaxed conditions. **アピールポイント:** * Fully remote work * Flexible working hours under a flextime system (no core hours) * Operates established digital platforms with over 25 years of operational history * LGBTQI\+ friendly \& vegan friendly * Small, focused team with direct communication and low bureaucracy * Opportunity to work on real production web applications * Long\-term, full\-time position with a stable workload **求める人材:** * Experience in full\-stack developement * Experience with .NET Core * Build web applications yourself in .NET Core * Ability to work independently in a fully remote environment * Communication skills in english with our team * Attention to code quality, maintainability, and performance **勤務時間・曜日:** 勤務時間・勤務形態 ・勤務日：月曜日〜金曜日 ・勤務時間：フレックスタイム制（コアタイムなし） ・休憩時間：60分（取得時間は業務状況に応じて調整） ・時間外労働：あり（業務状況により発生する場合あり） ・勤務形態：フルリモート（日本国内在宅勤務） **休暇・休日:** * Weekends off (Saturday and Sunday) * Japanese national holidays * 120 holidays per year * Fully remote work with a flextime system **待遇・福利厚生:** 社会保険 ・社会保険完備（健康保険、厚生年金保険、雇用保険、労災保険） **その他:** Job Type: Full\-time Pay: 600,000円 \- 800,000円 per month Average number of scheduled working hours (monthly): 160 hour(s) Language: * English (Required)