Software Engineer - Applications Platform

This position is based out of San Francisco, New York City or Seattle

We're looking for a highly motivated Applications Platform Engineer to join our engineering team. In this role, you’ll be responsible for designing, building, and maintaining core application frameworks and services that empower our engineering teams to efficiently build scalable, secure, and high-performing customer-facing products

This is a high-impact role that sits at the intersection of infrastructure and product engineering. You’ll collaborate closely with developers across teams to understand their needs, streamline development workflows, and ensure consistency and quality in our core platform capabilities.

The core platform at Modern Treasury sits between our customers and their banks. In the same way that Twilio abstracted away the complexity of working with communication networks, we have built an easy-to-use, common interface into the banking system. Our customers use our products to do things like move money to or from their users, automate back-office work, and record their transaction ledgers. The companies that can use Modern Treasury move over $750 trillion a year via bank payments, as compared to only $2 trillion per year on card payments.

Our API is often the most critical piece of infrastructure that our customers use. We place a premium on building robust, scalable systems that can sustain a high volume of API calls and exceed the reliability requirements to move money at scale. We complement this with well-thought out interfaces for our users and pride in writing quality API docs.

In addition to our API, we have had a web platform since day 1 that is used by accountants, controllers, and engineers. They use our platform to do things like manage payment workflows and monitor their business. As an engineer, you will work with our product team to build products and features for these users.

About Modern Treasury

Modern Treasury is the leading payment operations platform built for the Instant Economy. It helps customers build their best business with faster payments, smarter workflows, and real-time visibility—all powered by AI. The payment operations platform and best-in-class developer tools help companies move, track, and reconcile money in real-time. Founded in 2018, San Francisco-based Modern Treasury serves leading companies across broad sectors of the economy.

WEEK BY WEEK

During your first week you will:

• Get to know our leadership, culture, and values
• Set up your development environment and gain access to core systems.
• Meet with your manager and key stakeholders to understand goals, priorities, and team dynamics.
• Review existing platform codebases, documentation, and roadmaps.
• Ship your first commit on day 1
• Read some of our favorite industry primers

During your first six weeks you will:

• Ship your first platform improvements, bug fixes, or small features.
• Pair with team members to understand key systems and pain points.
• Participate in platform discussions and begin contributing feedback and ideas.

During your first six months you will:

• Support integration and adoption of platform components by product teams
• Independently deliver small to mid-sized platform features or improvements.Collaborate with senior engineers on cross-team projects and start contributing to broader platform strategy.
• Write your first blog post. We love writing at Modern Treasury (and have been on the front page of Hacker News multiple times with posts like “Accounting for Developers” and "What Happens When You ACH a Dead Person?")

What You Should Have

• Experience building web applications professionally for 2+ years in platform or infrastructure roles
• Strong experience working with Ruby on Rails
• Experience designing and building internal developer platforms, services, or SDKs
• Experience working with SQL/Relational databases
• Familiarity with modern application architectures (containerization, CI/CD)
• Proven ability to drive complex cross-team initiatives and align stakeholders
• Familiarity with software lifecycle, from development to deployment and monitoring
• A Bachelor’s, Master’s, or PhD degree in computer science or a directly related field, or equivalent work experience

TECHNOLOGIES WE USE

• Ruby on Rails for our backend framework
• React, GraphQL, and Tailwind CSS on the front end
• Postgres for our database
• Redis for caching
• AWS for infrastructure and hosting
• Docker for containerization
• GitHub for source code management
• Buildkite for continuous integration

Modern Treasury is committed to equal employment opportunity and does not discriminate in any employment opportunities or practices based on an individual's race, color, creed, gender (including gender identity and gender expression), religion (all aspects of religious beliefs, observance or practice, including religious dress or grooming practices), marital status, registered domestic partner status, age, national origin or ancestry (including language use restrictions and possession of a driver’s license issued under California Vehicle Code section 12801.9), natural hair, physical or mental disability, political affiliation, medical condition (including cancer or a record or history of cancer, and genetic characteristics), sex (including pregnancy, childbirth, breastfeeding or related medical condition), genetic information, sexual orientation, military and veteran status or any other consideration made unlawful by federal, state, or local laws. It also prohibits unlawful discrimination based on the perception that anyone has any of those characteristics, or is associated with a person who has or is perceived as having any of those characteristics.

Modern Treasury participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.

Compensation Range: $120K - $220K