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Added 5 days ago
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Senior Developer, Full-Stack .NET
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Added 5 days ago
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ACCO Engineered Systems

Senior Developer, Full-Stack .NET

Pasadena, CA, United States

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Job details

Experience: 6+ years of professional full-stack software development experience with a strong focus on hands-on coding.
Posting language: English
Posted: Nov 2, 2026

Original job description

Job Summary:

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 our Technical Application Architect through design review and adherence to enterprise coding standards, while independently owning implementation approach and execution across our 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.

Essential Duties and 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 our 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.

Position Requirements (Work Experience, Skills, Licenses, etc.):

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+), alongside modern front-end web technologies, including 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.

Education and Experience:

Required:

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.

ACCO Competencies:

Proactivity/Initiative: Recognizes what needs to be done and accomplishes it in a manner appropriate for one’s level/position and 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. Initiates action with collective goals, takes responsibility, and shows personal humility.
Technical Curiosity/Willingness to Learn: Interest in seeking out new experiences, knowledge, and candid feedback; demonstrating an openness to learning and change.
Insight: The ability to gather and make sense of information that suggests new possibilities.
Engagement: Shows a knack for using 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 & weaknesses and actively seeks to understand other perspectives.
Communication: Fosters open, honest, candid and respectful communication. Effectively assesses, defines and communicates issues in a timely manner, both written and verbal.
Teamwork: The ability to effectively work toward common goals with others by supporting, encouraging, and sharing information in an authentic and approachable manner.
Big Picture: Understands and contributes to the organizations’ short- and long-term business strategy. On a personal level 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: Effectively takes a vision and translates into action by including the right people. Identify and remove barriers, when possible, to achieve results. Demonstrates appropriate compromise, effective time management, prioritization practices and holds team members (including themselves) accountable for their performance/conduct.
Professionalism: Respectfully observes and challenges the status quo with intent for improvement. Can take direction, accept feedback, and take full responsibility for their actions. Lead by example through positive influence and ethical leadership with consideration of the entire organization.

Job Responsibility Level:

No direct reports

Travel Requirements:

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

Hours:

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. Physical Demands: (The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.)

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

Why join ACCO? 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. Whether your project is a low or high-rise office building, a shopping mall, hospital, semi-conductor fabrication facility or pharmaceutical manufacturing plant…ACCO can design, build, install, and maintain a mechanical system to meet your needs.

Here at ACCO, we are a part of something bigger. Just ask our customers: 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. And we are looking for talented individuals to join our team.

What's great about working at ACCO is that we’re a big enough company to be the leader in HVAC mechanical contracting in California and the Southwest U.S., but as a 100% employee-owned ESOP, we’re a private company with a family-oriented feel. Several of our employees have worked at ACCO for twenty-five, thirty, and even over forty years! Together, the employees of ACCO are comprised of intelligent, dedicated, and entrepreneurial team members who put customers first and enjoy what they do.

ACCO IS AN EQUAL OPPORTUNITY EMPLOYER AA M/F/V/D.

We proudly hire U.S. Military Veterans, and those qualified are encouraged to apply.

Equal Employment Opportunity is The Law.|Pay Transparency Nondiscrimination Provision

ACCO will consider qualified applicants with criminal histories for employment.

Notice to Outside Recruiters:

Hiring managers are not authorized to review or accept recruiting agreements from any outside recruiting agencies. Outside recruiting agencies should not submit unsolicited resumes without signing the company's recruiting agreement.

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More about this job

Skills

.NET
Quality assurance
Software development
CI/CD
C#
Microsoft .NET Framework
Vue.js
Microsoft Azure
SQL
Microsoft SQL Server
Databricks
Quality control
NUnit
Computer science
Coaching
Communication skills
Teamwork
Time management
Prioritization
Accept constructive criticism
Leadership

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