Senior Software Engineer – .NET, React, Azure

Castillians

Senior Software Engineer responsible for guiding and mentoring a team in software development. Focused on .NET, React, and Azure technologies at a leading IT services company.

Posted 7/9/2026contractRemote • 🌎 Anywhere in the WorldSeniorWebsite

Tech Stack

Tools & technologies

ASP.NETJavaScriptMS SQL Server.NETReactSQL

About the role

Key responsibilities & impact

Providing technical guidance and expertise to the team.
Supporting architectural and technology-related decision-making throughout the project lifecycle.
Mentoring team members on a regular basis to promote professional growth and knowledge sharing.
Fostering a culture of empowerment, innovation, and effective problem-solving within the team.
Participating actively in code reviews to ensure high standards of code quality and maintainability.
Taking part in Agile ceremonies and contributing to continuous team improvement.
Identifying, assessing, and helping resolve technical risks, issues, and project impediments.
Delivering constructive technical feedback and conducting reviews to support team success.
Resolving technology-related challenges that may hinder development progress.

Requirements

What you’ll need

At least 5 years of full-stack software development experience, with strong expertise in MS SQL Server, C#, .NET Core, .NET Framework, and ASP.NET MVC.
Solid back-end development experience using C#, including hands-on experience designing, developing, and maintaining APIs, services, and enterprise applications.
Strong front-end development skills using HTML, CSS, JavaScript, and modern frameworks such as React.
Proficiency with Git for source control, version management, and collaborative development workflows.
Excellent written and verbal communication skills in English, with the ability to articulate technical concepts clearly and work effectively within a team environment.
Strong organizational, time-management, and problem-solving abilities, with a proven capacity to manage competing priorities and perform well under pressure.
A proactive and solution-oriented approach, with the confidence to take initiative, challenge existing practices, and drive continuous improvement through innovative solutions.

Benefits

Comp & perks

Clear scope with no ambiguity over deliverables.
Opportunity for repeat engagements based on performance.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C#MS SQL ServerASP.NET MVCHTMLCSSJavaScriptReactAPI DevelopmentGit.NET Core

Soft Skills

Excellent Communication SkillsProblem-Solving AbilitiesOrganizational SkillsTime-Management SkillsMentoring