# Senior Software Engineer, Square Financial Services
**Company:** [Square](https://hotfix.jobs/companies/square)
**Location:** Remote
**Salary:** $185K-$327K
**Experience:** 5+ years
**Skills:** AWS, Kotlin, Java, Go, TypeScript, React, Kubernetes, Aws Fargate, Aws Ecs, Aws Aurora, DynamoDB, Swagger, Protocol Buffers, gRPC, Rest
**Posted:** 2026-06-26
> Senior engineer building and operating core banking platform features, public APIs, and financial tooling on AWS with Kotlin. Requires 5+ years experience and a bachelor's degree.
## Job Description
## You Will
- Design and build new features into our banking platform that meet the diverse needs of Block's broad portfolio of products and services
- Partner with engineering teams across Block to help onboard their products to SFS
- Build systems that operate on our customers' most sensitive data, while holding Square to the highest standards for security and compliance
- Design fault tolerant systems so the team can be brave and move fast, without ever negatively affecting our customers
- Ensure the continued operation of our critical services, remediate any problems that occur, and design durable fixes so that they don't happen again

## You Have
- 5 or more years of relevant experience and a Bachelor's Degree
- Hands-on skills building software products or services in the cloud (AWS, Azure, GCP, etc.)
- A track record of building software that is easy to observe and operate
- A strong sense of customer empathy and a drive to ship software that improves their lives
- Excellent written and verbal communication skills
- Proficiency building products and services using AWS
- Proficiency with Kotlin
- Experience building public APIs
- Experience building tools for finance operations

## Technologies We Use and Teach
- Kotlin/Java, Go
- TypeScript, React, PhantomJS
- Temporal.io, Kubernetes, AWS Fargate + ECS
- AWS Aurora and DynamoDB
- Swagger, Protocol Buffers, gRPC, REST
- Unit Tests, Continuous Integration, and other methods of quality assurance
**Apply:** https://hotfix.jobs/jobs/senior-software-engineer-square-financial-services-at-square-31271cbb-247e-40eb-a117-a7c385415b06
**Canonical:** https://hotfix.jobs/jobs/senior-software-engineer-square-financial-services-at-square-31271cbb-247e-40eb-a117-a7c385415b06