Front is the customer operations platform built for B2B complexity, keeping every team, tool, and customer conversation in sync so companies can scale without losing connection. Others handle simple interactions. Front handles the coordination and context behind complex B2B customer relationships. Over 9,000 companies, including Uber Freight, Navan, and Stripe, rely on Front because it's the only one that can run the operational layer that makes customer-facing work actually succeed. Backed by Sequoia Capital and Salesforce Ventures, Front has raised $204M from leading venture capital firms and independent investors including top executives at Atlassian, Okta, Qualtrics, Zoom, and PagerDuty.

About the Position

Introduction

Front is a customer operations platform designed for complex B2B interactions, synchronizing teams, tools, and customer conversations to enable companies to scale without losing personal connection. It specializes in the intricate coordination and context required for successful B2B customer relationships, trusted by over 9,000 companies including Uber Freight, Navan, and Stripe.

Front is seeking two experienced Senior Backend Software Engineers to join its Deliverability team in San Francisco. This team is central 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. The role involves owning critical infrastructure, taking a technical leadership position, and enhancing deliverability systems for performance, scalability, and reliability.

Responsibilities

Serve as a technical lead on the Deliverability team, guiding the architecture and execution of significant infrastructure and product projects.
Own and enhance high-volume email infrastructure and decisioning systems, covering ingestion, routing, and outbound delivery to ensure deliverability outcomes at scale.
Oversee key services powering Front and lead architectural advancements to build for reliability and scalability.
Collaborate with other systems and infrastructure teams to develop 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.
Comfort owning complex systems and making impactful architectural decisions.
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, focused on building scalable and extensible solutions that meet customer requirements.
Fluency in dynamic languages such as 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 trade-offs in engineering solutions, prioritizing pragmatism.
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 high-volume email sending (millions of messages/day).
Experience with DNS infrastructure.
Experience working with software systems built on Amazon Web Services (AWS).
Deep knowledge of the email stack and assorted RFCs.
Experience with anti-spam infrastructure.
Experience building 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 leading VCs).
Private health insurance, with some options at no cost to employees.
Paid parental leave.
Flexible time off policy.
Flexibility to work from home Monday and Friday (unless fully remote role).
Mental health support with Workplace Options.
Family planning support with 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).

About Company

Front is the customer operations platform built for B2B complexity, keeping every team, tool, and customer conversation in sync so companies can scale without losing connection. Trusted by over 9,000 companies, Front handles the coordination and context behind complex B2B customer relationships. Backed by Sequoia Capital and Salesforce Ventures, Front has raised $204M from leading venture capital firms and independent investors. The company has received many 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. Front operates on a hybrid model, requiring in-office presence on Tuesdays, Wednesdays, and Thursdays for collaboration.