Senior Software Engineer, Payments

Tabs is the AI Operating System for Revenue, built for modern finance and accounting teams. It combines deep revenue and accounting expertise with the agents and applications needed to run revenue work end to end. Tabs understands customer and contract context, applies accounting logic, and executes critical workflows with built in controls, auditability, and human oversight. With Tabs, finance teams can move from manually managing revenue workflows to directing outcomes while the system executes the work. About the Role Tabs is seeking a Senior Software Engineer specifically focused on building out custom payments workflows and integrations with payment service providers. As a member of our early-stage startup, you’ll have the opportunity to shape the direction of the company and make a meaningful impact on our success. How We Work We work hard. Two-week sprints based on defined goals with short feedback cycles. Built around intra-month product releases. We work smart. Get in front of the customer, use both data and customer feedback to drive decisions, while keeping the bigger picture in mind. Hash out your ideas with other smart engineers who are dedicated to coming up with great solutions. We work together. In-office culture with people you want to work with. Lots of whiteboard space. Expense lunch and dinner when in the office, and bagel Fridays! What You'll Do Be our payments expert as we build out systems that support multiple PSPs and other exciting similar payment opportunities. There are a lot of moving pieces that have to line up and you’ll own and drive significant projects that make it work. Work closely with other engineering teams to make sure the entire revenue lifecycle delivers a frictionless billing and payment experience for our merchants and their customers. Put AI to work everywhere it can move the needle, whether it’s product automation, business process improvement, or the team’s day-to-day workflow. We're dealing with our customers' revenue, so we use AI aggressively while also getting the numbers exactly right. Level up the engineers around you. The team's about 30 today with a good range of experience and backgrounds, and we’re growing fast. You'll be someone people look up to as you set the technical bar, mentor and learn from those around you, and shape the kind of culture we want as we get bigger. About You You’ve been building software professionally for 5+ years and shipped high-impact products with a specialization in building payments systems with at least a couple of Payment Processors. You've led big, complex system design before, ideally somewhere that was moving and growing fast. You're hands-on with modern languages and frameworks. You still like being in the code, not just talking about it. You've got a strong grip on the fundamentals like algorithms, data structures, and distributed systems. You know how to apply them where they actually matter. You’re genuinely excited about AI, already using it, testing its limits, and keeping up with the latest advancements. Ambiguity doesn't slow you down. You thrive in the early, undefined stage of a problem where you get to shape the answer rather than follow a spec. You're the kind of engineer other engineers want to learn from, and you truly enjoy that aspect of the role. Not sure you tick every box? Apply anyway. If you're excited about what we're building, we want to hear from you. Tech & Tools Day to day, you'll be in Next.js, Nest.js, TypeScript, and React. You'll have a wide range of GenAI systems and tooling to build with, and a lot of freedom in how you use them. We run on AWS and Vercel, with Datadog and Sentry for observability, and Stripe and Plaid powering payments. For everything else, we use modern tools like Slack, Notion, Linear, and Google Workspace. Location: NYC, 5 days onsite Perks and Benefits (Full-time Employees) Competitive compensation and equity Unlimited PTO Up to 100% employer covered monthly healthcare premium (medical, dental, vision) Lunch provided via Sharebite, plus dinner for any later in office days. Parental leave up to 12 weeks Tax free commuter and parking benefits Voluntary insurances (Life, Hospital, Critical Illness, Accident) Employee Assistance Program (Rightway) Free One Medical Membership 401k Tabs is an equal opportunity employer. We welcome teammates of all identities and do not discriminate on the basis of race, ethnicity, religion, gender identity, sexual orientation, age, disability, veteran status, or any other protected characteristic. We’re committed to creating an environment where everyone can grow, contribute, and feel comfortable being themselves.