Senior Back End Developer

Who are we?

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.

What are we hiring for?

We're seeking a Senior Backend Software Engineer to join our engineering team and help build a robust, scalable infrastructure that powers our global marketplace platforms. You'll be designing and developing high-performance backend services and APIs that handle millions of auction events, bids, and transactions across our international marketplaces.

In this role, you'll work with modern technologies including Go, Redis, and MySQL to build microservices that scale globally. You'll collaborate closely with Product, Engineering, DevOps teams to deliver features that directly impact our users' experience and our business growth.

This is an opportunity to make a significant impact on a platform serving millions of users worldwide while working with cutting-edge technologies in a rapidly evolving industry.

What you'll be doing:

• Design, develop, and maintain scalable backend services and RESTful APIs using Go
• Build and optimize high-performance microservices that handle real-time bidding, transactions, and user interactions
• Implement robust data models and schemas in MySQL/RDS, ensuring data integrity and optimal performance
• Develop caching strategies using Redis to improve application performance and reduce database load
• Write clean, maintainable, and well-tested code with comprehensive unit, integration, and end-to-end tests
• Build and maintain CI/CD pipelines using GitHub Actions for automated testing and deployment
• Implement observability and monitoring solutions using Dyatrace/Dataset
• Collaborate with cross-functional teams to define requirements, architect solutions, and deliver features
• Participate in code reviews, provide constructive feedback, and maintain high code quality standards
• Debug production issues, optimize system performance, and ensure high availability
• Contribute to technical documentation and architectural decision-making
• Mentor junior engineers and share knowledge with the broader engineering team

Who are we looking for?

Required Experience & Skills:

• 5+ years of professional software engineering experience with a focus on backend development
• Strong proficiency in Go, with production experience building scalable services
• Experience with relational databases (MySQL, RDS) including schema design, optimization, and query tuning
• Understanding of Redis and caching strategies for high-performance applications
• Proficiency with Git
• Experience implementing observability with tools like Dynatrace
• Strong understanding of RESTful API design principles and best practices
• Experience with microservices architecture and distributed systems
• Knowledge of message queuing systems (RabbitMQ, Kafka, AWS SQS/SNS) or event-driven architectures
• Familiarity with AWS cloud services (Lambda, API Gateway, S3, CloudWatch, etc.)
• Understanding of authentication/authorization patterns (OAuth, JWT, API keys)
• Experience with testing frameworks and writing comprehensive test suites (Go testing)
• Strong problem-solving skills with the ability to debug complex distributed systems

Soft Skills:

• Passion for building solutions while continuously iterating and improving using the latest technologies
• Customer-centric mindset with a focus on delivering value to end users
• Experience enabling data-driven decisions through well-architected systems
• Excellent communication skills with the ability to explain technical concepts to diverse audiences
• Comfortable working cross-functionally with Product, Engineering, DevOps, and Data teams
• Strong track record of successful prioritization and meeting critical deadlines
• Proactive approach to identifying and addressing technical debt and system improvements
• Collaborative team player who thrives in a fast-paced, agile environment
• Ability to balance competing priorities and manage multiple projects simultaneously

Nice-to-Have:

• Experience with API design and implementation
• Knowledge of Docker
• Experience in eCommerce, marketplace, or auction platforms
• Background in high-traffic, real-time bidding, or payment processing systems
• Experience with performance testing and optimization tools
• Experience with on-call rotation and incident management