**Who this is for** This role is for an experienced Senior Software Engineer with a deep understanding of banking infrastructure and a passion for building miss
Work type: remote
Location: San Francisco, CA, New York, NY, Portland, OR, or Remote within Canada or United States
Salary: $166,600 – $250,900/yr
Type: Full-time
**Who this is for** This role is for an experienced Senior Software Engineer with a deep understanding of banking infrastructure and a passion for building mission-critical integration platforms. If you are adept at navigating complex enterprise systems and enjoy solving challenging problems in a highly regulated financial environment, this is an exceptional opportunity. **Key highlights** You will be a key player in building Mercury's Banking Integration Platform, connecting modern systems to established enterprise core banking systems and payment networks. This role involves designing robust APIs, managing intricate integration complexities, and owning the reliability of the most critical external connections. **You might be a good fit if you...** - Have direct experience with FFIEC-compliant bank cores or US-based Global Systemically Important Banks (G-SIBs). - Understand the intricacies of core banking operations, including accounts, transactions, and ledger systems. - Are a product-minded engineer focused on creating intuitive APIs for other developers. - Thrive in environments where you are building new, impactful systems from the ground up. - Are comfortable with or eager to learn Haskell and TypeScript. - Have strong opinions on building reliable and maintainable systems.
When the Space Shuttle approached the International Space Station, two vehicles built by different teams, in different countries, with fundamentally different engineering philosophies and systems, had to connect perfectly. The Rendezvous, Proximity Operations, and Docking (RPOD) subsystems were engineered to handle complex mismatches such as different power systems, communication protocols, and technical architectures. Get it wrong, and you have an expensive and potentially catastrophic problem in low Earth orbit.
Mercury announced on December 19, 2025 that we submitted an application to the OCC for a national bank charter and applied for FDIC deposit insurance. In other words, Mercury is building a bank. As part of this work, we will be connecting our modern, product-focused engineering systems to enterprise core banking systems and payment networks built in a different era, with different assumptions and different interfaces. Mercury’s Banking Integration Platform as a Service team is like NASA’s RPOD team, building our integration subsystems that are technically correct and operationally trustworthy.
This is some of the most consequential infrastructure work at Mercury. Every account opening, every monetary transaction, and every balance call will flow through the systems you build. Product teams across the company will depend on clean abstractions that hide the complexity underneath. You'll be one of the few engineers at Mercury who truly understands the full depth of our Bank Core and all its internal and external integrations.
In this role, you will:
The total rewards package at Mercury includes base salary, equity, and benefits.
Our salary and equity ranges are highly competitive within the SaaS and fintech industry and are updated regularly using the most reliable compensation survey data for our industry. New hire offers are made based on a candidate’s experience, expertise, geographic location, and internal pay equity relative to peers.
Our target new hire base salary ranges for this role are the following:
Mercury values diversity & belonging and is proud to be an Equal Employment Opportunity employer. All individuals seeking employment at Mercury are considered without regard to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation, or any other legally protected characteristic. We are committed to providing reasonable accommodations throughout the recruitment process for applicants with disabilities or special needs. If you need assistance, or an accommodation, please let your recruiter know once you are contacted about a role.
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