One is a fintech company creating simple solutions to help customers save, spend, borrow, and grow their money – all in one place.

One is on a mission to revolutionize financial services by creating an all-in-one platform to help customers achieve financial progress. Backed by Ribbit and Walmart, we're addressing the crucial need in the U.S. market where millions of Americans struggle with access to credit and efficient financial management.

As a Full Stack Engineer on the One@Work team, you'll be at the forefront of developing employer benefit features, including Instapay, savings, and budgeting. You'll work with a modern tech stack including fp-ts library for functional programming with Node/TypeScript running on Kubernetes and AWS. The role offers an opportunity to build simple yet powerful experiences that impact people's daily financial interactions.

We're looking for someone who brings not just technical expertise, but also embodies our values of being Hungry, Humble, and Honest. You'll be joining a remote-friendly environment that values collaboration and innovation, with competitive compensation including a base salary range of $120,000 to $170,000, plus equity and comprehensive benefits.

The position offers significant growth potential in a high-growth fintech startup, where you'll work on solving complex problems involving real-world money movement and sensitive financial data at scale. We maintain the agility of a startup while backed by industry giants, creating an unique environment for professional growth and meaningful impact.

Full Stack Engineer position at One, building employer benefit features with Node/TypeScript and Kubernetes, offering competitive salary and remote work flexibility.

Full Stack Engineer - One@Work

One is on a mission to revolutionize financial progress for customers by creating an all-in-one platform for saving, spending, borrowing, and growing money. As a Full Stack Engineer on the One@Work team, you'll be responsible for building employer benefit features including Instapay, savings, and budgeting. The role involves creating simple yet powerful experiences for daily financial interactions.

The company is uniquely positioned with backing from Ribbit and Walmart, combining startup agility with strong financial support. They're tackling significant challenges in the US financial landscape, where many Americans struggle with access to comprehensive financial services.

The technical stack includes fp-ts library for functional programming with Node/TypeScript running on Kubernetes and AWS. While specific tool experience isn't required, familiarity with functional programming concepts is beneficial. The role offers competitive compensation ($120,000-$170,000) and comprehensive benefits including stock options and flexible work arrangements.

The ideal candidate brings 2+ years of professional experience and embodies the company's values of being hungry, humble, and honest. You'll be joining a remote-friendly environment with offices in New York and Sacramento, working on complex problems involving real-world money movement and sensitive financial data at scale.

One maintains a commitment to diversity and inclusion, recognizing that diverse perspectives are crucial for building technology that solves real-world problems. The company offers a collaborative environment where engineers partner on challenging problems while maintaining work-life balance through flexible time off and comprehensive benefits.

Full Stack Engineer position at One, building employer benefit features including Instapay, savings, and budgeting solutions.

Full Stack Engineer- One@Work

One is a fintech company backed by Ribbit and Walmart, creating simple solutions to help customers save, spend, borrow, and grow their money in one place.

One is on a mission to revolutionize financial services by creating an all-in-one platform to help customers achieve financial progress. As a Staff Software Engineer on the banking team, you'll play a crucial role in building core banking features including direct deposit, goals, savings, ledger, and bill pay systems.

The position offers a unique opportunity to work at the intersection of fintech and consumer banking, backed by industry leaders Ribbit and Walmart. You'll be joining a company that maintains startup agility while addressing critical financial challenges faced by millions of Americans - from credit access to wealth building.

The role demands a highly technical individual who can architect and implement scalable banking solutions while handling sensitive financial data. You'll be working with modern technologies including TypeScript, Node.js, and Kubernetes, utilizing functional programming principles in an AWS environment.

Your responsibilities will span from system architecture to mentoring team members, requiring both technical excellence and strong leadership skills. The ideal candidate brings 6+ years of experience in building customer-facing products, deep knowledge of banking systems, and a proven track record in fintech or banking organizations.

What makes this opportunity special is the chance to directly impact financial inclusion while working with a world-class team. One values quality across code, communication, and culture, offering a remote-first environment that emphasizes documentation and collaborative problem-solving.

The company maintains a flat organizational structure and is deeply committed to building a diverse, inclusive team. If you're passionate about using technology to solve real-world financial challenges and want to be part of a mission-driven organization, this role offers the perfect blend of technical challenges and meaningful impact.

Staff Software Engineer position at One, building scalable banking products and core financial features in a remote environment using modern technologies.

Staff Software Engineer, Product Banking

One is an innovative fintech company on a mission to revolutionize financial progress for customers. Backed by prominent investors Ribbit and Walmart, we're creating an all-in-one platform for saving, spending, borrowing, and growing money. We're addressing a crucial gap in the U.S. financial landscape, where millions are underserved by traditional banking systems.

As an Application Security Engineer, you'll play a pivotal role in ensuring the security and reliability of One's financial applications at scale. This position combines technical expertise with strategic thinking, requiring you to partner with engineering teams to embed security from the ground up. You'll be responsible for implementing secure development practices, conducting penetration testing, and developing security frameworks that protect our customers' financial data.

The ideal candidate brings 4+ years of security engineering experience, with deep knowledge of modern security practices, tools, and frameworks. You'll need proficiency in TypeScript, AWS, and security testing tools, along with experience in application architecture and deployment practices. Your expertise in cryptography, regulatory compliance, and security vulnerability assessment will be crucial.

This remote position offers a competitive salary range of $175,000-$220,000, along with comprehensive benefits including equity, 401(k) with match, and flexible time off. You'll join a fast-growing startup environment where you can make a direct impact on financial inclusion while working with cutting-edge security technologies.

If you're passionate about building secure financial systems that help people achieve their financial goals, and you embody our values of being Humble, Hungry, and Honest, this role offers an exceptional opportunity to shape the future of financial technology while growing your career in application security.

Senior Application Security Engineer role at One, focusing on securing fintech applications and implementing secure development practices.

Application Security Engineer

One is a fintech company backed by Ribbit and Walmart, focused on helping customers achieve financial progress through integrated financial solutions.

One is revolutionizing financial services with a mission to help customers achieve financial progress. Backed by Ribbit and Walmart, we're creating an integrated platform where customers can save, spend, borrow, and grow their money – all in one place. As a Senior Backend Software Engineer, you'll be instrumental in building products and systems that serve our customers and run our company. The role involves collaborating across teams, from product and design to customer support and compliance. We're tackling unique challenges in financial technology, handling sensitive data at scale, and creating innovative financial mechanics. You'll be part of a growing team that values quality, communication, and culture while working in a hybrid environment. The position offers competitive compensation, comprehensive benefits, and the opportunity to make a real impact in helping millions of Americans achieve better financial outcomes. Our engineering culture emphasizes collaboration, documentation, and technical excellence, making this an ideal role for someone who wants to grow while building meaningful financial technology solutions.

Senior Backend Software Engineer role at One, building scalable financial technology solutions to help customers achieve financial progress.

Senior Software Engineer (Backend)

One is a fintech company backed by Ribbit and Walmart, focused on helping customers achieve financial progress by providing solutions for saving, spending, borrowing, and growing money in one place.

One is revolutionizing financial services by creating an all-in-one platform to help customers save, spend, borrow, and grow their money. As a Site Reliability Engineer at One, you'll play a crucial role in ensuring the reliability and availability of critical services that impact millions of Americans' financial lives. The company is uniquely positioned with backing from Ribbit and Walmart, combining the agility of a startup with strong financial support.

The role offers an exciting opportunity to be an early member of the growing SRE team, where you'll help establish core processes and best practices. You'll work with distributed systems, implement observability solutions, and drive the incident management process while maintaining a blameless culture. The position requires expertise in cloud native systems, programming skills in languages like Python, TypeScript, or Go, and experience with observability platforms.

The company offers an attractive compensation package ranging from $120,000 to $190,000, along with comprehensive benefits including equity, flexible work arrangements, and various leave options. One's commitment to inclusion and diversity, combined with their mission to improve financial access for underserved populations, makes this an opportunity to make a real impact while working with cutting-edge technology.

Working at One means joining a mission-driven company that's addressing real problems in the financial sector, with roughly 80% of fintech users currently relying on multiple accounts to manage their finances. The role offers both technical challenges and the satisfaction of helping build systems that contribute to people's financial progress.

Senior Site Reliability Engineer position at One, focusing on ensuring reliability of critical financial services with competitive pay and comprehensive benefits.

One Engineering Jobs

One is a fintech company creating simple solutions to help customers save, spend, borrow, and grow their money – all in one place.