Front is the customer operations platform purpose-built for the intricacies of B2B business. It keeps every team, tool, and customer conversation synchronized, enabling companies to grow significantly without losing their personal touch. For complex B2B customer relationships, where simple interactions fall short, Front provides the essential coordination and context. Over 9,000 companies, including industry leaders like Uber Freight, Navan, and Stripe, depend on Front to manage the operational layer vital for successful customer-facing work. Front is backed by Sequoia Capital and Salesforce Ventures, having secured $204M in funding from leading venture capital firms and independent investors. The company has received extensive recognition as a Great Place to Work, including being named among Built In's 100 Best Midsize Places to Work in SF 2025, a Top Place to Work by USA Today 2025, on Y Combinator's list of Top Companies in 2023, #4 on Fortune’s Best Workplaces in the Bay Area™, listed in Inc. Magazine's 2022 Best Workplaces, and featured on Forbes Best Startup Employers 2022 List. Front operates on a hybrid model, requiring in-office collaboration on Tuesdays, Wednesdays, and Thursdays.

About the Position

Introduction

Front is a customer operations platform designed for B2B complexity, synchronizing teams, tools, and conversations to enable scalable customer relationships. Unlike platforms handling simple interactions, Front excels at the coordination and context demanded by complex B2B customer relationships. Over 9,000 companies, including Uber Freight, Navan, and Stripe, rely on Front for its operational layer crucial to customer-facing success.

Front is backed by Sequoia Capital and Salesforce Ventures, having raised $204M from prominent VC firms and investors. It has earned numerous Great Place to Work accolades, including Built In's 100 Best Midsize Places to Work in SF 2025, Top Places to Work by USA Today 2025, Y Combinator's list of Top Companies in 2023, #4 on Fortune’s Best Workplaces in the Bay Area™, Inc. Magazine's 2022 Best Workplaces list, and Forbes Best Startup Employers 2022 List.

We are seeking two experienced Senior Backend Software Engineers to join our Deliverability team in San Francisco. This team is critical to Front's operations, managing the pipeline that connects Front to the external world, processing tens of millions of events for reliable email, SMS, and message delivery. You will own crucial infrastructure and provide technical leadership, enhancing deliverability systems for performance, scalability, and reliability.

Responsibilities

Serve as a technical lead on the Deliverability team, guiding the architecture and execution of major infrastructure and product projects.
Own and improve high-volume email infrastructure and decisioning systems, covering ingestion, routing, and outbound delivery to ensure deliverability at scale.
Oversee key services powering Front and lead architectural advancements for enhanced reliability and scalability.
Collaborate with other systems and infrastructure teams to contribute to next-generation architecture.
Work closely with product managers, product designers, and other engineers to conceptualize, build, and test new product features.

Requirements

5+ years of professional software engineering experience.
Strong experience building and operating high-scale, distributed backend systems.
Comfortable with owning complex systems and making architectural decisions with real production impact.
A collaborative, low-ego approach to engineering and cross-team partnerships.
Experience with on-call responsibilities and a strong sense of ownership over system reliability.
Product mindset, focusing on building scalable and extensible solutions that meet customer requirements.
Fluency in a dynamic language like Javascript (Typescript), Python, Ruby, or similar.
Strong track record of launching and delivering projects of significant complexity and high levels of ambiguity.
Experience architecting, deploying, and operating asynchronous work queues, high-volume storage systems, or high-throughput systems.
Ability to understand the trade-offs in employing different engineering solutions, prioritizing pragmatism over idealism.
Ability to thrive in a dynamic, fast-paced, collaborative, and high-growth environment.

Nice to Have

Prior experience at a B2B SaaS or customer communications company.
Familiarity with email sending at high volume (millions of messages/day).
Experience with DNS infrastructure.
Experience working on software systems built on Amazon Web Services.
Deep knowledge of the email stack and assorted RFCs.
Experience with anti-spam infrastructure to prevent abuse of email services.
Built deep integrations with email delivery services like SendGrid, MailGun, Mandrill, or SparkPost.
Experience with Gmail or Office 365 APIs.
Experience with Kafka.

Benefits

Competitive salary.
Equity (post-series D, backed by top US VCs).
Private health insurance, with some no-cost employee plan options.
Paid parental leave.
Flexible time off policy.
Flexibility to work from home on Monday and Friday (unless a fully remote role).
Mental health support via Workplace Options.
Family planning support via Maven.
$100 per month Lifestyle Stipend for fitness, health, wellness, and other activities.
Wellness Days: additional day off in months without holidays.
Winter Break: offices closed from Christmas to New Year's Day.