Senior Software Engineer - NYC

About Sequence

We care deeply about the quality of the product we're building. We're looking for ambitious software engineers with strong backend and cloud infrastructure experience to build the systems that power billing for modern B2B companies.

What you'll be doing

• Own revenue-critical event infrastructure.
  • You'll work on systems that process customer usage data on which billing and invoicing depend.
  • Design event streaming pipelines that handle high throughput with low latency.
  • Build robust systems where data accuracy is non-negotiable.
  • Design scalable data systems.
  • You'll work with event streaming architectures, building sophisticated ingestion pipelines and query optimization strategies.
  • Our event volumes grow with every new customer, so you'll architect systems that scale efficiently while keeping costs reasonable.
  • Shape our backend architecture.
    • You'll tackle our most complex technical challenges and set the standards for how we solve them.
    • Our services run on Kotlin with Spring Boot, and you'll have significant influence over architectural patterns and how we approach infrastructure problems.
  • Build for the next phase of growth.
    • You'll design systems that work beautifully today and scale to 10x the load tomorrow.
    • This means thinking about data storage strategies, horizontal scalability, and how your architectural decisions affect performance as volume increases.

What you should apply if

• You're a builder who wants to solve problems end-to-end.
  • You've shipped production backend systems and care about the difference between "it works" and "it's reliable."
• You love building systems that scale.
  • You've worked on backends that handle significant load and understand the tradeoffs in designing for throughput, latency, and cost.
• You have strong experience in event-driven architectures.
  • You've built pub/sub systems, worked with event streaming platforms, and understand the nuances of event delivery semantics, backpressure, and ordering guarantees.
• You think deeply about data systems.
  • You've worked with analytical databases or OLAP systems.
• You own your infrastructure.
  • You've provisioned cloud resources, written infrastructure-as-code, and made architectural decisions that balance competing constraints.
• You understand how to model and optimize costs as systems scale.
  • You care about customers - you want to understand why you're building something, not just what.
• You're comfortable with ambiguity.
  • You thrive in early ideation stages, share work-in-progress to gather feedback, and adapt easily based on input.
• You communicate clearly.
  • Thoughtful communication is a superpower that sharpens how we collaborate and build.

This might not be right if

• We're a small team moving fast on hard problems.
• You enjoy larger organization structures and staying only within your area of expertise.
• Taking ownership here means doing whatever the problem needs.
• You prefer a traditional engineering team set up, with a predictable roadmap and clearly scoped out tickets provided for you.
• You prefer a slower pace. Customers are depending on what we ship.
• You aren't comfortable with production responsibility. We're revenue-critical infrastructure - on-call matters here.

Tech stack

• Backend: Kotlin (modular monolith using Http4k, Spring Boot, Exposed, Result4k)
• Storage: Postgres, BigQuery
• Async messaging: Google Cloud Pub/Sub
• Infrastructure: Google Cloud, Terraform
• Frontend: TypeScript, React
• Monitoring: Google Cloud Monitoring, Sentry
• Tools: GitHub, Slack, Notion, Linear

How we work

• We're based in London and New York and love spending as much time with our colleagues as possible.
• We spend three days together in the office, with team lunch on Wednesdays.
• We get together twice a year for company offsites.

What we offer

• Salary: $210,000 - $230,000
• Equity: Meaningful share options
• 20 days vacation plus national holidays
• Competitive healthcare and 401K
• Visa sponsorship available

Interview process

• We move fast - typically 2 weeks start to finish.
• We've written a detailed blog post about the process with tips for how to prepare.

Public resources on Sequence

• Podcast: Wharton FinTech: Reinventing Billing & Quote-to-cash (Dec 2025): origin story, why Riya built Sequence after her first exit.
• Podcast: USXP: From Oxford to a16z: building a US-first mindset at Sequence: go-to-market and US expansion.
• Podcast: The FP&A Guy: How modern finance teams are automating billing with AI: guest piece on AI in finance ops.
• Podcast: The SaaS CFO with Ben Murray: AI-native B2B billing pitch.
• Podcast: Converge Podcast (May 2024): "financial router" framing.
• Written: USXP: From Oxford to a16z: building a US-first mindset at Sequence: go-to-market and US expansion.
• Written: The FP&A Guy: How modern finance teams are automating billing with AI: guest piece on AI in finance ops.
• Written: Sequence blog: Introducing Sequence 2.0: her launch post for the AI-native rebuild.