Senior Software Engineer

Position Overview

As the energy sector undergoes rapid digital transformation, demand for our services continues to grow. To accelerate our business growth and deliver greater value to our customers, we are looking for a talented and driven Software Engineer to become a key member of our development team.

Responsibilities

You will be responsible for the design, development, and operation of Bluefield Cloud and related new services. Depending on your experience and interests, your responsibilities may include:

• Define requirements, design, implement, test, and release new features
• Improve existing features and address technical debt and performance bottlenecks
• Design and improve system architecture with scalability and reliability in mind
• Build, operate, and optimize cloud infrastructure (Microsoft Azure)
• Promote development process improvements and automation
• Provide technical support and code reviews for team members

Why Join Us

• Work on socially impactful product development in the rapidly growing EnergyTech market
• Gain experience in a cloud-native development environment centered around Microsoft Azure
• Take ownership and contribute to product direction as part of a small, high-caliber team

Ideal Candidate Profile

• Self-motivated with the ability to identify and solve problems proactively
• Shares our vision of supporting critical social infrastructure
• Interested in documentation and system design, and values teamwork
• Eager to continuously learn and apply new technologies and design methods

Required Skills and Experience

• Experience developing web applications using C# and ASP.NET Core
• Database development using Entity Framework Core
• Designing and implementing REST APIs
• Experience writing automated unit tests
• Solid understanding of object-oriented design and design patterns
• Basic knowledge of relational databases (e.g., SQL Server)
• Experience developing systems in cloud environments (e.g., Azure)
• Familiarity with Agile development methodologies (e.g., Scrum)

Preferred Skills and Experience

• Experience with agent-driven development and harness engineering
• Experience building cloud infrastructure on Microsoft Azure and using Azure DevOps
• Hands-on experience with Agile frameworks like Scrum
• Understanding of DDD, EventStorming, or Clean Architecture
• Knowledge of architecture patterns like CQRS, Mediator, or Inbox/Outbox
• Experience with React and Carbon Design System
• Ability to understand electricity industry regulations and legal frameworks in Japanese

Technology Stack

Backend

• Language: C#
• Framework: ASP.NET Core
• ORM: Entity Framework Core
• API: REST (OpenAPI)
• Libraries: FastEndpoints, MediatR, Finbuckle.MultiTenant, FluentValidation, Polly
• Testing: xUnit

Frontend

• Language: TypeScript
• Framework: React
• Build Tool: Vite
• Styling: SCSS
• Linters & Formatters: ESLint, Stylelint
• UI Framework: Carbon React
• Testing: Playwright, Vitest, React Testing Library
• API Client: Kiota

Infrastructure

• Cloud: Microsoft Azure
• Hosting: Azure App Service (container), Azure Functions
• Database: Azure SQL Database
• Messaging & Storage: Azure Storage Queues, Azure Blob Storage
• Configuration & Secrets: Azure App Configuration (with feature flags), Azure Key Vault

Development and Operations Tools

• Project Management: Azure Boards (Azure DevOps)
• Source Control: GitHub
• Build: Nuke, Docker Compose
• CI/CD: GitHub Actions
• Communication: Microsoft Teams

Development Environment

• Coding Agent: Claude Code (Team plan)
• Workstation: Lenovo ThinkPad (AMD Ryzen 7 or Intel Core Ultra 7+, RAM 32GB+, SSD 512GB+, 14")

Selection Process

• Document Screening
• First Technical Assessment
• Second Technical Assessment
• First Interview
• Third Technical Assessment
• Second Interview
• Third Interview
• Final Interview