# Senior Product Engineer (Backend) - NYC

**Company:** [Sequence](https://hotfix.jobs/companies/sequence)
**Location:** New York, NY
**Role:** Backend Engineering
**Salary:** $210k – $230k/yr
**Skills:** Kotlin, Postgres, BigQuery, Google Cloud Pub/Sub, GCP, Terraform, Spring Boot, Http4K, Exposed, React, TypeScript, Sentry
**Posted:** 2026-04-29

> Builds reliable backend systems for AI-powered revenue workflows, approval routing, collections agents, and scalable billing infrastructure. Owns end-to-end from ideation to production, focusing on distributed systems and customer needs in a fast-scaling fintech platform.

## Job Description

## Responsibilities
- Build AI-powered approval workflows configurable in natural language, turning them into deterministic business logic.
- Develop intelligent collections agents for autonomous payment workflows.
- Scale billing infrastructure for 10x throughput, optimizing storage, scalability, and cost.
- Design systems for high-velocity event streams, balancing cost, performance, and reliability.
- Build business-critical infrastructure handling production responsibility and on-call.

## Requirements
- Shipped production backend systems focused on reliability.
- Customer-oriented with end-to-end ownership from ideation to shipping.
- Comfortable with ambiguity, sharing work-in-progress, and adapting based on feedback.
- Strong communication skills.
- Interest in distributed systems and resilient software.

## Nice-to-Haves
- Deep relational database expertise for complex queries and performance.

## Tech Stack
**Backend:** Kotlin (Http4k, Spring Boot, Exposed, Result4k)
**Storage:** Postgres, BigQuery
**Async:** Google Cloud Pub/Sub
**Infra:** Google Cloud, Terraform
**Frontend:** TypeScript, React
**Monitoring:** Google Cloud Monitoring, Sentry

## Compensation
- Salary: $210,000 - $230,000
- Equity: Meaningful share options
- 20 days vacation plus national holidays
- Competitive healthcare and 401K

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**Apply:** https://hotfix.jobs/jobs/998a7d20-9813-4983-8a27-5306408c9bc3
**Canonical:** https://hotfix.jobs/jobs/998a7d20-9813-4983-8a27-5306408c9bc3