Senior .NET Engineer

About Excella

Excella is a transformative technology firm that helps organizations unlock new possibilities. We believe the key to helping clients challenge the status quo and reach new heights lies in our talented people. That’s why we’re committed to developing talent and providing opportunities for career growth at every stage. Join our collaborative team dedicated to solving complex problems with sustainable solutions while building your future as a leader.

At Excella, you’re empowered to make lasting impact, turning today’s challenges into tomorrow’s mission successes.

• Workplace locations vary;
  Excellians are a distributed workforce with flexible work/life integration regardless of location.
• Top‑of‑industry medical, dental, and vision benefits plus options like employer‑contributed HSA, infertility coverage, orthodontia.
• 8 weeks of parental leave, discounted pet insurance,  membership with 3 back‑up emergency child/elder care days annually.
• 15 days paid vacation, 6 federal holidays, 4 floating holidays; bonus eligible from day one.
• TechEleX program: choose Mac or PC, hardware refreshed every three years; original device kept for personal use.
• Annual internet reimbursement: $25/month to offset internet costs.
• 3 paid professional development days per year with registration fee allowance.
• Employee wellness events, Head Space membership, access to Talk Space and mental health coverage via medical plans.
• Diversity and inclusion initiatives: employee‑led affinity groups and Inclusion Diversity Equity Ambassador (IDEA) team.
• Bring‑your‑device workplace: cost shared for a new Mac or PC.

Excella is a leading provider of Agile software development and data/analytics solutions to clients in the federal, commercial and non‑profit sectors. We need passionate, innovative people who love working with technology and are ready to make an impact.

• Design and implement scalable, high‑performance applications using modern .NET technologies and frameworks.
• Collaborate with clients and teammates to translate business requirements into technical solutions.
• Develop robust RESTful APIs and web applications using ASP.NET Core.
• Create responsive and interactive user interfaces with modern JavaScript frameworks.
• Apply SOLID principles, design patterns, and automated testing best practices.
• Conduct thorough code reviews and provide constructive feedback to maintain code quality.
• Mentor junior team members and share knowledge across the organization.
• Stay current with emerging technologies in the .NET ecosystem and contribute to technical discussions.
• Participate actively in agile ceremonies and contribute to continuous improvement initiatives.
• Advocate for quality engineering practices and modern development approaches.

• 3+ years of .NET development experience with strong technical foundation.
• Expertise in C# and ASP.NET Core for web applications & APIs.
• Experience with modern frontend tech such as React, Angular, or Vue.js.
• Strong knowledge of SQL Server, Entity Framework Core, and other ORMs.
• Proficiency in test‑driven development and tools such as xUnit, NUnit, Moq.
• Knowledge of cloud platforms (Azure, AWS) and Docker.
• Understanding of API design principles and implementation best practices.
• Proficiency in Git‑based workflows and SDLC management.
• Experience in agile environments following agile methodologies.
• Excellent communication skills, able to explain complex technical concepts.
• Problem‑solving mindset with strong analytical and critical thinking skills.

• Experience with microservices architecture and distributed systems.
• Knowledge of CI/CD pipelines using Azure Dev Ops, Git Hub Actions, or similar tools.
• Familiarity with .NET performance optimization and debugging techniques.
• Experience with serverless computing and event‑driven architectures.
• Understanding of WCAG and implementing accessible applications.
• Experience with observability tools for monitoring & logging.
• Proficiency with GenAI productivity tools such as ChatGPT, Claude, Git Hub Copilot.
• Understanding of trunk‑based development practices and feature flags.
• Experience with message brokers, asynchronous processing technologies.
• Understanding of Dev Sec Ops  principles and application security best practices.

Excella is an equal‑opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law.

Excella is committed to providing access, equal opportunity, and reasonable accommodation for individuals with disabilities in employment. To request reasonable accommodation to participate in the job application or interview process, contact  or 703‑840‑8600.

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