Staff/Senior Software Engineer, Salesforce

• Must have lawful permanent residency in the U.S
• 8+ years of experience in software engineering, with a strong focus on distributed systems, cloud-native applications, and microservices
• Hands-on experience with cloud providers such as AWS or GCP
• Strong knowledge of TCP/IP, DNS, DNSSEC, and related network protocols
• Proven track record of building tools, automation, or services using one or more programming languages (e.g., Go, Ruby, Python, C/C++)
• Extensive experience with infrastructure-as-code (Terraform, CloudFormation)
• Prior experience deploying, operating, and debugging server software on Linux
• Strong interpersonal and communication skills; able to explain complex technical concepts to designers, support staff, and fellow engineers
• A BS, MS, or Ph.D. in Computer Science, Engineering, or related technical field (or equivalent work experience)

Desirable

• The Cloud Network team is a globally distributed team of systems and software engineers across Australia, the US, and Canada, responsible for enabling the fast and reliable delivery of Slack to over 17M+ daily active users worldwide
• We manage Slack’s AWS cloud ecosystem and provide the foundational networking, account and identity access, and infrastructure-as-code platforms that power Slack’s operations at scale
• Our work spans ingress load balancing and intelligent traffic management—including our own fleet of software load balancers, cloud load balancing infrastructure, DNS and CDN services
• We also design and operate systems for DDoS detection and automated mitigation, ensuring Slack remains resilient against large-scale threats
• We are a small team making a large impact. We rapidly iterate and work closely with other teams in engineering ensuring resilient systems built to scale
• We have a strong commitment to quality and understand that simplicity and reliability should be primary aspects of the systems that we build. Reliability is Slack’s most critical feature!
• This is a full-time staff engineering position based in the U.S
• Design, build, and operate the systems that power Slack’s global cloud networking stack—including ingress/egress load balancing, service-to-service networking, DNS, CDN, and traffic management
• Develop and automate detection, mitigation, and response systems to defend against DDoS and other large-scale network threats
• Contribute to infrastructure-as-code and automation frameworks to improve reliability, repeatability, and efficiency
• Troubleshoot complex issues across applications, distributed systems, and networks in Linux-based environments
• Partner closely with AWS and other engineering teams to scale Slack’s worldwide infrastructure and adopt new cloud technologies
• Drive improvements in system observability, reliability, and ease-of-use by iterating quickly on designs and collaborating across engineering
• Participate in on-call rotations to ensure the availability and resiliency of critical Slack infrastructure