Senior Software Development Engineer – .NET Core at NTT Ltd.

The Senior Software Development Engineer is responsible for leading the technical delivery of .NET Core solutions within an agile team, contributing deep hands-on expertise while guiding solution design and implementation. This role plays a key part in shaping application architecture, ensuring code quality, and supporting junior engineers, while collaborating closely with team leads and client stakeholders to deliver scalable, secure, and maintainable systems.


Key Responsibilities


Design and develop robust .NET Core applications aligned to client business and operational requirements.
Translate business and functional requirements into well-structured, scalable technical solutions.
Take ownership of complex components, integrations, and critical code paths within the solution.
Contribute to architectural decisions and ensure adherence to established patterns and best practices.
Lead by example through high-quality code, testing discipline, and documentation.
Actively participate in sprint planning, estimation, and delivery tracking using Azure DevOps.
Perform code reviews and provide constructive guidance to intermediate and junior developers.
Collaborate with testers, analysts, and DevOps engineers to ensure smooth end-to-end delivery.
Support deployment, monitoring, and troubleshooting across non-production and production environments.
Ensure solutions comply with security, governance, and regulatory standards applicable to client environments.


Technical Skills & Tools


Languages & Frameworks: C#, ASP.NET Core, EF Core, SQL, TypeScript, HTML/CSS
DevOps & CI/CD: Azure DevOps, Git, Docker (experience advantageous)
Front-End: Vue (or similar modern JavaScript framework)
Cloud & Infrastructure: Microsoft Azure (App Services, Functions, Storage, Virtual Machines)
Testing & QA: xUnit, Playwright (or equivalent), Postman
Security: OAuth2, JWT, OWASP Top 10 secure coding practices


Knowledge & Attributes


Strong technical problem-solving and analytical skills.
Ability to work independently while contributing effectively within a team.
Comfortable engaging with technical and non-technical stakeholders.
Demonstrated ownership mindset and accountability for delivered solutions.
Ability to mentor and uplift less experienced developers.
Solid understanding of Agile delivery methodologies and SDLC best practices.
Experience balancing technical excellence with delivery timelines.


Qualifications


Bachelor's degree in Computer Science, Engineering, or related field (advantageous) or equivalent practical experience.
Microsoft or Azure-related certifications are advantageous.
Additional certifications in software architecture or cloud technologies are beneficial.


Experience


5 - 8 years of professional software development experience.
Proven experience delivering production-grade .NET Core applications.
Experience working in Agile teams with responsibility for significant solution components.
Exposure to regulated or enterprise environments (e.g., healthcare, finance) is advantageous.
Demonstrated experience supporting applications across the full SDLC, including post-deployment support.