Software Engineer (Senior)

Modern Treasury
San Francisco, CA

OVERVIEW

This position can be based out of San Francisco, New York, or remote (we accept candidates from the following states: AZ, CA, CO, CT, FL, GA, HI, IL, MA, MI, MN, MT, NC, NJ, NV, NY, OH, OK, OR, PA, TX, UT, WA, WI ).

We're looking for Software Engineers to join our Engineering team. In this role, you will build innovative payments products that delight both engineering and finance teams. As an early member of the engineering team, you will help shape the engineering culture of a fast-growing startup.

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 .

We believe in using the best tool for the job, rather than always using open source or building things ourselves. We actively embrace open source in parts of our system but aren't afraid to roll our own solution for things like writing and parsing bank files. We also contribute to open source (for example, ).

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 operating system for money movement. Our payment operations platform combines a suite of APIs and dashboards to help companies unlock new payments revenue, strengthen customer experiences, and drive efficiency through their business. Our end-to-end platform moves enterprises forward with faster payments, efficient workflows, full data visibility, and seamless bank integrations.

WEEK BY WEEK

During your first week you will:

  • Get to know our leadership, culture, and values

  • Onboard with the engineering team

  • Ship your first commit on day 1

  • Take on 1-2 small tickets to address bugs or make minor improvements

  • Read our favorite industry primers

During your first six weeks you will:

  • Ship your first major project

  • 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 "What Happens When You ACH a Dead Person?" and "How to Build an Insurance Company")

  • Shadow a few customer and partner meetings every week

During your first six months you will:

  • Work with our product team to scope and ship products for both our engineering and finance users

  • Help grow our team by mentoring new engineers, writing internal tooling and documentation, and interviewing new hires

WHAT YOU SHOULD HAVE

  • 6+ years of professional software engineering experience

  • Experience working with SQL/Relational databases

  • Experience working with large-scale, high-availability systems

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.

Posted 2025-08-22

Recommended Jobs

Field Application Engineer (FAE) - Mechanical & Electronic Background Required_San jose

Q-Edge Corporation, Foxconn
San Jose, CA

About FoxconnAbout Foxconn As the world’s largest electronics manufacturer and a global leader in technology solutions, Foxconn is driving innovation across a wide range of industries, from cons…

View Details
Posted 2025-07-30

Controller

Robert Half
Saint Helena, CA

Job Description Job Description Are you a seasoned accounting leader with a passion for wine and production environments? We’re seeking a Controller to oversee the financial health of a multi-e…

View Details
Posted 2025-07-30

Associate, Business Operations

Jerry.ai
Bodega Bay, CA

Job Description Job Description You could work anywhere. Why us? Join a pre-IPO startup with capital, traction and runway ($240M funded | 60X revenue growth in 5 years | $2T market size) Part…

View Details
Posted 2025-07-30

Software Engineer, Inference - Multi Modal

OpenAI
San Francisco, CA

About the Team OpenAI’s Inference team powers the deployment of our most advanced models - including our GPT models, 4o Image Generation, and Whisper - across a variety of platforms. Our work ensu…

View Details
Posted 2025-08-07

Environmental Technician - 2205821

Waste Management
Carson, CA

As an EEO/Affirmative Action Employer, all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, nation…

View Details
Posted 2025-07-30

Instrument Test Associate II

Medical Devices Company
San Jose, CA

Roles & Responsibilities Essential Functions: Performs instrument optimization functions after final assembly: laser alignment, pressure adjustments, electrical adjustments, etc. Performs fi…

View Details
Posted 2025-07-30

FSQA Sanitation Technician - Palisades Ranch (R83834)

Sysco
Los Angeles, CA

Company: US0310 Pallisades Ranch, Inc. Zip Code: 90058 Minimum Level of Education: High School or Equivalent Minimum Years of Experience: 3 Years Employment Type: Full Time …

View Details
Posted 2025-07-30

Principal Software Engineer - Video - Design Experience - (Role based in Australia, relocation [...] (San Francisco)

black.ai
San Francisco, CA

Job Description Join the team redefining how the world experiences video creation. Hey, g'day, mabuhay, kia ora, , hallo, vtejte! Thanks for stopping by. We know job hunting can be a little…

View Details
Posted 2025-08-17

CLM Solution Lead, Manager Save for Later Remove job

PwC
Sacramento, CA

A career within Data and Analytics services will provide you with the opportunity to help organisations uncover enterprise insights and drive business results using smarter data analytics. We focus…

View Details
Posted 2025-08-07

Manager, Audience Development/ CRM - Los Angeles, 90038

Universal Music Group
Los Angeles, CA

Manager, Audience Development/ CRM - Los Angeles, 90038, United States of America How we LEAD:  UMG Global Audience Development is seeking a creative and collaborative Manager, Audience Developm…

View Details
Posted 2025-07-31