Senior .NET Software Engineer

ATG (Auction Technology Group); United States; Remote; USD 100,000 - 150,000; Full time

Job summary

A leading company in the auction technology industry seeks a Senior .NET Software Engineer to develop impactful features for their high-transaction e-commerce applications. This remote position requires expertise in React and .NET Core, along with strong collaboration skills in an agile environment.

Benefits

Opportunities to grow and take ownership

A culture that values innovation and learning

Qualifications

• 5+ years of software development experience in full-stack engineering roles.
• Strong experience with React and related front-end frameworks (Next.js, TypeScript).
• Expertise in .NET Core (3+ years) for backend services.

Responsibilities

• Develop and enhance user interfaces using React, Next.js, and modern front-end technologies.
• Design and maintain scalable .NET Core backend services, ensuring high performance.
• Collaborate with UX designers, product managers, and backend engineers to create applications.

Skills

Front-end development

Collaboration

Continuous improvement

Performance optimization

Software engineering best practices

Job description

Job Details: Senior .NET Software Engineer

Full details of the job.

Vacancy Name

Vacancy Name Senior .NET Software Engineer

Vacancy No

Vacancy No VN217

Status

Status Active

Location

Location Remote US

Location Country

Location Country United States

Location Region

Location City

Description

Description Who We Are:

Auction Technology Group (ATG) is transforming the multi-billion-dollar global auction industry. Our platforms connect thousands of auction houses with buyers in over 170 countries, powering more than $15 billion in annual sales. Through innovative online auction technologies, we help auctioneers expand their reach, boost efficiency, and maximize value—while giving bidders unrivaled access to rare and specialized items.

As a publicly traded company, ATG has scaled from $18 million to $170 million in revenue, with sustained growth beyond the pandemic. We're modernizing one of the last industries to fully go digital—building a global, category-defining business in the process.

Who Are We Looking For:

As a Senior Full-Stack Engineer at ATG, you'll play a key role in developing high-impact features for our high-transaction e-commerce web applications. While you are comfortable working across the stack, you have a strong inclination toward front-end development and delivering exceptional user experiences using React and modern front-end technologies.

You thrive in an agile, DevOps-focused environment, believe in continuous delivery, and understand that quality is a shared responsibility. You will help shape technical decisions, mentor team members, and drive best practices in both front-end and back-end development. Our team values collaboration, ownership, and innovation, and we look forward to welcoming someone who shares these principles.

Key Responsibilities

Key Responsibilities • Develop and enhance user interfaces using React, Next.js, and modern front-end technologies
• Design and maintain scalable .NET Core backend services, ensuring high performance and reliability
• Collaborate with UX designers, product managers, and backend engineers to create intuitive and performant applications
• Write clean, maintainable, and well-tested code across the full stack, with a strong emphasis on front-end best practices
• Optimize application performance and ensure smooth user experiences
• Conduct code reviews and advocate for high standards in accessibility, responsiveness, and maintainability
• Work with cloud platforms such as AWS, Azure, or Google Cloud to deploy and scale applications
• Troubleshoot issues, optimize performance, and continuously improve the development process

Key Requirements

Key Requirements • A passion for building great user experiences and front-end development while being comfortable working across the stack
• Strong collaboration skills—you enjoy brainstorming with designers and backend engineers to build cohesive features
• A product-focused mindset, balancing technical excellence with delivering real value to users
• A willingness to embrace new technologies and continuously improve your skills
• 5+ years of software development experience in full-stack engineering roles
• Strong experience with React and related front-end frameworks (Next.js, TypeScript, etc.)
• Expertise in .NET Core (3+ years) for building scalable backend services
• Solid understanding of RESTful APIs, microservices architecture, and event-driven systems
• Experience with SQL and NoSQL databases such as SQL Server, PostgreSQL, or MySQL
• Familiarity with cloud platforms (AWS, Azure, or Google Cloud) and designing scalable applications
• Strong grasp of software engineering best practices, including CI/CD, automated testing, and performance optimization

Why Join Us?

• Work on impactful projects that reach thousands of users
• Collaborate with a skilled, supportive, and forward-thinking team
• Opportunities to grow and take ownership in a fast-paced, evolving company
• A culture that values innovation, learning, and delivering great experiences