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Sr Engineer, Software (.Net)

Dover · Downers Grove, IL · Full time

Posted Oct 2, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a production bug that was hard to find. How did you track it down?

What they are checking: Whether they debug methodically with logs and evidence, rather than changing code until the problem disappears.

Our development teams sit in several countries. Tell me about working on a project with engineers in other time zones.

What they are checking: Whether they communicate clearly in writing and hand off work cleanly across a global team.

What would you do

How do you review a junior developer's pull request that works but is hard to maintain?

What they are checking: Whether they teach through code review and raise the team's standard without crushing confidence.

A product manager wants a feature in two weeks that you think needs six. How do you handle it?

What they are checking: Whether they negotiate scope honestly and offer options, instead of either caving or flatly refusing.

How do you decide when to refactor old code and when to leave it alone?

What they are checking: Whether they weigh business value and risk before rewriting code that already works in the field.

About the work

Walk me through a .NET application you designed from the ground up. What choices did you make about architecture, and would you make them again?

What they are checking: Whether they can explain design decisions and their tradeoffs, which is what separates a senior engineer from a fast coder.

Fueling sites run payment and tank gauging software that cannot go down. How would you design a .NET service that keeps working when the network to the cloud drops?

What they are checking: Whether they plan for offline operation and safe recovery, which matters for equipment at a gas station.

How do you handle async code and threading in C# without creating deadlocks or race conditions?

What they are checking: Whether they understand concurrency deeply enough to avoid bugs that only show up in the field under load.

Payment data passes through fueling systems. What do you do in code to protect card data and meet PCI requirements?

What they are checking: Whether they treat security as part of everyday coding, since a breach at a fuel site hurts customers and the brand.

What is your approach to automated testing in a .NET codebase that has very little coverage today?

What they are checking: Whether they add tests where risk is highest and improve a legacy codebase gradually instead of stalling on a rewrite.

What does a good CI/CD pipeline look like for software that ships to devices at customer sites?

What they are checking: Whether they think about safe releases, versioning and rollback when software runs on hardware far away.

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The full job description

As published by Dover.

At Dover Fueling Solutions (DFS), we are taking fueling and convenience retail to the next level. We are passionate about cultivating excellence in everything we do, but what really fuels us is our people. They’re the heart of our company. As an employee, our promise to you is that you’ll work on new and innovative products and solutions, be mentored by managers and teammates who are collaborative, caring, and act with integrity, and have the opportunity to grow in ways that are meaningful to you. Unique and interesting projects – both locally and globally – will challenge you and allow you to pursue different and rewarding career paths. We are #EnergizedByGrowth. DFS is part of a legacy of leadership that spans back generations, made up of some of the most trusted, leading-edge brands in the industry. As part of Dover Corporation and with our talented, innovative, outstanding people, we are doing great things and redefining what is possible in fueling and convenience retail. Providing advanced fuel-dispensing equipment, including clean energy solutions, systems and payment, automatic tank gauging and wet stock-management solutions, DFS comprises the product brands of Wayne Fueling Systems, OPW Fuel Management Systems, ClearView, Tokheim, ProGauge, Fairbanks, LIQAL, AvaLAN, and Bulloch Technologies. Headquartered in Austin, TX, DFS has a significant technology development and manufacturing presence worldwide, including facilities in Brazil, China, India, Italy, Poland, the Netherlands, the United Kingdom and the United States. Position Summary The Full Stack AWS & Azure Developer will design, develop, and maintain robust cloud solutions across AWS and Azure platforms. This role focuses on full stack development using C# for backend services, integrated with an Angular frontend and modern cloud infrastructure. The developer will build scalable, secure applications and hybrid cloud integrations, ensuring high performance and compliance with industry standards. Experience with MikroTik or similar networking products is highly desirable to assist with hardware-cloud integrations. Job Details • Location : Downers Grove, IL • Work Policy : Hybrid (4 days in office, 1 day work from home per week) Main Responsibilities • Architect Applications : Design and implement full stack applications and hybrid solutions across AWS and Azure. • Write Code : Develop clean, secure backend services in C# and responsive interfaces using Angular. • Integrate Systems : Build APIs and custom scripts to connect cloud services with on-premises infrastructure. • Collaborate Daily : Participate in technical meetings to translate client requirements into scalable system architectures. • Optimize Performance : Identify and implement application features that improve speed, security, and cloud efficiency. • Document Work : Create comprehensive documentation for system designs, API endpoints, and deployment procedures. • Review & Test : Perform regular unit testing and conduct peer code reviews to maintain high code quality. • Provide Support : Offer Level 2/3 troubleshooting support for complex application and cloud infrastructure issues. • Stay Updated : Monitor advancements in AWS, Azure, and Angular ecosystems to pitch continuous product upgrades. Requirements • Education : Bachelor’s degree in Computer Science, Information Technology, or a related field (Master’s degree is a plus). • Experience : Minimum of 3 years of continuous experience in full stack application development and cloud engineering. • Frontend Skills : Strong proficiency in Angular, TypeScript, HTML5, and CSS3. • Backend Skills : Strong proficiency in C# and .NET Core framework for building backend services. • Cloud Platforms : Hands-on experience deploying and managing resources in both AWS and Azure environments. • Database Knowledge : Proficiency with SQL (e.g., PostgreSQL, SQL Server) and NoSQL databases. • DevOps & CI/CD : Experience setting up automated pipelines using Git, AWS Code Pipeline, or Azure DevOps. Nice to Have • Certifications : AWS Certified Developer, Microsoft Certified: Azure Developer Associate, or relevant networking credentials. #LI-TE1 
This position is eligible to earn a discretionary bonus based on performance metrics and other criteria outlined in our applicable bonus plan.

We consider several job-related, non-discriminatory factors when determining the pay rate for a position, including, but not limited to, the position’s responsibilities, a candidate’s work experience, a candidate’s education/training, the position’s location, and the key skills needed for the position. Pay is one of the Total Rewards that we provide to compensate and recognize employees for their work.


 All qualified applicants will receive consideration for employment without discrimination on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, age, genetic information, or any other factors prohibited by law. Fraudulent Recruiting Disclaimer: Dover Corporation and our affiliated operating companies want to alert applicants to internet job posting fraud, where parties posing as Dover employees, recruiters, or other agents, try to engage with online candidates in an attempt to steal personal and/or financial information. We do not endorse or engage in any recruitment practices that involve payment or personal information outside of our official application and hiring process. Please verify the authenticity of an invitation to apply for a job, or for a job offer by contacting us directly through our Dover and affiliated operating company websites at https://careers.dovercorporation.com/ . To learn how you can protect yourself, review our Recruitment Fraud Notice on our careers site.

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