Senior Software Engineer, Ledger & Payments Platform

Block; California (MO); Hybrid; USD 218,000 - 327,000; Full time

Benefits offered by this job

Medical insurance

Remote work

Flexible time off

Retirement savings plans

Family planning support

Job summary

Block, Inc. is seeking a Senior Software Engineer for Ledgering to design, build, and operate the systems of record for balances and transactions used by Square and Cash App.

You will develop settlement orchestration and self-serve APIs to accelerate partner integrations, while ensuring data contracts and reliability at scale. You will collaborate with product managers, finance, and treasury stakeholders to ship new capabilities, mentor engineers, and drive architectural excellence in a

Qualifications

• 8+ years of related experience with a Bachelor's degree; or 6 years and a Master's degree; or a PhD with 3 years experience.

Responsibilities

• Design, build, and operate the balance and transaction systems of record that serve as the financial source of truth for millions of merchants and customers.
• Build settlement orchestration that determines how account holders get paid: schedules, amounts, deposit methods, and withholdings.
• Develop self-serve ledgering APIs with durable semantics and clear contracts, so partner teams can stand up a new balance or transaction type in about a day instead of waiting weeks on custom integration work.
• Emit balance and settlement data that downstream finance, reconciliation, and reporting teams can trust, against agreed data contracts.
• Design and implement reliable, high-volume distributed transaction-processing systems, making thoughtful tradeoffs between consistency and availability when both are not possible.
• Drive convergence across a large portfolio of financial services: consistent transaction and balance models, shared workflow tooling, and predictable integration patterns.
• Operate tier-0 and tier-1 financial systems against published SLOs, and debug production issues across services and multiple levels of the stack in a high-reliability environment.
• Work AI-natively: use AI agents throughout the development lifecycle, and build agents and automation that reduce operational toil across our services.
• Lead complex projects end to end, breaking the work into components and milestones that other engineers can pick up.
• Mentor other engineers and contribute to the technical direction of the team.
• Work with engineers, product managers, and finance and treasury stakeholders across the company to ship new capabilities at scale.

Skills

Distributed systems

High-throughput

SQL

Java

Kotlin

Go

Team leadership

Mentoring

AI tooling

Education

Bachelor's degree

Master's degree

PhD

Tools

AWS

Kubernetes

Terraform

Datadog

MySQL

Aurora

Vitess

Databricks

Snowflake

Temporal

Protocol Buffers

jOOQ

GraphQL

Job description

Block, Inc. is seeking a Senior Software Engineer for Ledgering to design, build, and operate the systems of record for balances and transactions used by Square and Cash App.

You will develop settlement orchestration and self-serve APIs to accelerate partner integrations, while ensuring data contracts and reliability at scale. You will collaborate with product managers, finance, and treasury stakeholders to ship new capabilities, mentor engineers, and drive architectural excellence in a