Senior Developer, Full-Stack .NET

About the Role

The Senior Full-Stack .NET Developer balances deep, hands-on .NET software coding with technical oversight and vendor direction. This position acts as the vital bridge between architectural vision and team execution, collaborating closely with the Technical Application Architect through design review and adherence to enterprise coding standards, while independently owning implementation approach and execution across Azure Cloud infrastructure.

A key component of this role involves writing clean, production-grade .NET code, directing tasks for managed services vendors, verifying the quality of their deliverables, and partnering closely with Software Quality Assurance (SQA) to guarantee robust, thoroughly tested applications.

Responsibilities

• Drive hands-on software development by writing clean, maintainable, and secure code across the entire application stack.
• Incorporate design guidance and standards review from the Technical Application Architect while independently determining implementation approach for secure, robust, and scalable cloud applications, as well as desktop and mobile solutions.
• Define clear technical requirements, assign development tasks to external managed services partners, and rigorously review their code to ensure alignment with ACCO’s standards.
• Collaborate actively with the Software Quality Assurance team to design test plans, facilitate automated and manual testing, and ensure overall application stability prior to deployment.
• Build and maintain a diverse application portfolio, focusing heavily on .NET cloud architectures while supporting desktop and mobile initiatives within the Microsoft ecosystem.
• Establish, document, and enforce code quality, security protocols, and CI/CD pipelines across internal and external teams to ensure absolute adherence to architectural standards.
• Conduct pairing sessions, code reviews, and workshops to help junior and mid-level developers level up their development, architectures, and overall engineering skills.
• Ensure all internal developers and external partners understand and follow core design patterns, minimizing technical debt.
• Build and maintain responsive, component-driven front-end interfaces, integrating them cleanly with back-end services to deliver a high-quality user experience.

Requirements

• 6+ years of professional full-stack software development experience with a strong focus on hands-on coding.
• Advanced, expert-level proficiency writing clean code in C# and the .NET framework (.NET Core / .NET 6 / .NET 8+).
• Hands-on experience building single-page applications with Vue.js.
• Hands-on experience developing, deploying, and managing cloud-native .NET applications within the Azure Cloud ecosystem.
• Strong SQL skills and hands-on experience working with relational and analytical data platforms, specifically Microsoft SQL Server and Databricks, including writing performant queries and integrating data access into .NET applications.
• Proven experience assigning work to third-party vendors or managed services teams and conducting strict quality control/code reviews on their deliverables.
• Strong familiarity with software testing methodologies, collaborating with QA teams, and implementing .NET unit/integration tests (e.g., xUnit, NUnit).
• Solid grasp of dependency injection and inversion of control, with hands-on experience using the built-in .NET dependency injection container to build loosely coupled, testable, and maintainable applications.

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, Engineering, or equivalent practical/industry experience.
• Desired experience developing console applications or background services or building cross-platform mobile applications as single-page apps using Vue.js with the Quasar framework.
• Proven track record of leading, mentoring, or acting as a technical lead for a team of developers.
• Certifications such as Azure Developer Associate or Azure Solutions Architect.

Skills

• Proactivity/Initiative: Recognizes what needs to be done and accomplishes it with minimal supervision.
• Perseverance: Shows wherewithal to fight for difficult goals despite challenges and to bounce back from adversity.
• Motivation/Dedication: Commits to excellence in pursuing unselfish goals, takes responsibility, and shows personal humility.
• Technical Curiosity/Willingness to Learn: Interest in seeking out new experiences, knowledge, and candid feedback; openness to learning and change.
• Insight: Ability to gather and make sense of information that suggests new possibilities.
• Engagement: Uses emotion and logic to communicate a persuasive vision and connect with people.
• People Skills: Is approachable and gains the mutual trust and respect of others; understands people’s strengths and weaknesses.
• Communication: Fosters open, honest, candid, and respectful communication; effectively assesses and defines issues in a timely manner.
• Teamwork: Effectively works toward common goals by supporting, encouraging, and sharing information in an authentic and approachable manner.
• Big Picture: Understands and contributes to organizational strategy; has independently developed a vision for short- and long-term career success.
• Problem-Solver: Ability to identify, analyze, and solve problems in support of personnel, group, department, or organizational objectives.
• Execution: Translates vision into action, removes barriers, demonstrates time management, prioritization, and holds team members accountable.
• Professionalism: Respectfully challenges the status quo, accepts feedback, and takes responsibility; leads by example through positive influence and ethical leadership.

Schedule

This is an exempt position. Workdays are scheduled from Monday through Friday. Typically, work hours begin and end between 7:00 am and 5:00 pm as scheduled with the position's supervisor. Work outside of regular hours may occasionally be necessary to meet business needs.

Travel required 0-5% of the time to other office locations.

Physical Demands

• Must frequently lift and/or move up to 10 pounds and occasionally lift and/or move up to 20 pounds.
• Specific vision abilities required include close vision and ability to adjust focus.
• Prolonged sitting.
• Frequently required to reach with hands and arms.
• Occasionally required to stand, walk, stoop, kneel, or crouch.

Pay

Competitive wages ranging from $133,000 to $171,500 annual salary. Actual compensation is determined by several factors unique to each candidate, including job-related skills, depth of experience, certifications, relevant education or training, and specific work location.

About Us

ACCO Engineered Systems is one of the largest mechanical contractors in the country. Since 1934, owners and builders have selected ACCO to design, install, and maintain more than 250,000 mechanical projects. ACCO is dedicated to the design, fabrication, installation, maintenance, and service of commercial and industrial HVAC, refrigeration, plumbing, process piping, and building automation systems.

Here at ACCO, we are a part of something bigger. Projects include the California Academy of Sciences, L.A. Live, and San Francisco 49ers Stadium. While we have been around for 80+ years, we continue to grow at a dynamic pace. As a 100% employee-owned ESOP, we’re a private company with a family-oriented feel. Several employees have worked at ACCO for twenty-five, thirty, and even over forty years!