Senior Software Engineer, Mercury

Banking Integration Platform

$200.7-250.9k

For Canadian employees (any location): CAD $189,700 - $237,100. + Equity for all

Haskell

Senior and Expert level

New York

San Francisco Bay Area

Remote from Canada, US

Banking services for startups and small businesses

Be an early applicant

Banking services for startups and small businesses

1001+ employees

FintechB2BBankingFinancial Services

Be an early applicant

$200.7-250.9k

For Canadian employees (any location): CAD $189,700 - $237,100. + Equity for all

Haskell

Senior and Expert level

New York

San Francisco Bay Area

Remote from Canada, US

1001+ employees

FintechB2BBankingFinancial Services

Company mission

To make scaling tech companies simpler with a personalized banking stack for startups, and power the next generation of companies that will shape the American industry.

Job

Company

Role

Who you are

Has 7+ years of professional software engineering experience building and operating backend infrastructure and distributed systems at scale
Has experience integrating modern distributed software systems with older, legacy infrastructure, preferably in a highly-regulated environment. There are unique challenges when embarking on such a mission, and we’re looking for someone who is excited to join with eyes wide open
Has an understanding of how banks and banking systems work: accounts, transactions, ledgers, and the data models underneath
Is a product-minded engineer who thinks about the developers consuming your APIs, not just the systems you’re connecting to
Thrives in environments where you're building something new rather than maintaining something established
Is comfortable with our tech stack (Haskell) or ready to learn
Has strong and justified opinions about building reliable, maintainable systems

What the job involves

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
As a Senior Software Engineer on the Banking Integration Platform Team, you’ll play a key role as a technical leader and hands-on engineer in building seamless connections between Mercury and the outside financial world
Building Mercury Bank is the most important adventure the company is embarking on, and you have the opportunity to go on this mission
Build Mercury’s integration with an FFIEC-approved bank core and the connections to payment networks
Design internal APIs that give product teams simple, consistent interfaces to complex external systems
Handle the messy realities of enterprise integrations such as retries, failures, format mismatches, and downtime
Build data pipelines that keep Mercury's systems in sync with our bank core
Own monitoring, alerting, and recovery for our most critical external connections
Partner with many other teams at Mercury to define clean boundaries and reliable contracts
Help shape the technical architecture of Mercury Bank*

Our take

Frustrated by the archaic, fee-laden banking services offered to entrepreneurs, the founders of Mercury set out to create a better solution. They envisioned a platform that was dynamic, tech-driven, and free from unnecessary fees.

Mercury delivers on this vision by automating business payment processes, offering FDIC-insured accounts, and providing full API access, empowering entrepreneurs with greater control and efficiency. This approach stands in stark contrast to traditional startup banking, which often burdens young businesses with high fees and limited functionality.

By prioritizing user experience and offering a free service tier, Mercury has attracted over 200,000 businesses and, off the back of a $300 million Series C round, achieved a $5.2B valuation as of 2026. As a rising unicorn in the stagnant world of startup banking, Mercury is poised for continued growth, constantly adding new features and expanding its team to further disrupt the industry.

Kirsty

Company Specialist at Welcome to the Jungle

Insights

Top investors

50% employee growth in 12 months

Glassdoor (4.4)

Trustpilot (3.9)

Company

Funding (last 2 of 6 rounds)

May 2026

$200m

SERIES D

Mar 2025

$300m

SERIES C

Total funding: $650.9m

Company benefits

Health, dental, & vision
12+ weeks of paid parental leave
$600 USD custom WFH equipment setup
Unlimited vacation policy (with a mandatory minimum)
Annual $1K learning & development budget
Paid 6-week sabbatical after the 5-year mark
Weekly $100 food budget
Monthly $100 wellness budget
Monthly $50 cellphone reimbursement
Pet-friendly offices with free tea and beverages, plus lunch and snacks
Unlimited vacation policy (with a mandatory minimum)
Retirement matching up to 4% of base salary (401K/RRSP)
Inclusive fertility, hormonal health, and family-forming benefits through Carrot Fertility

Company HQ

SoMa, San Francisco, CA

Leadership

Jason Zhang

(Co-Founder & COO)

Jason graduated from Stanford University with a Bachelor of Science in Biology before spending over 4 years at Heyzap in Business Development.

Immad Akhund

(Co-Founder & CEO)

Immad graduated from the University of Cambridge with a Masters in Computer Science. He then worked as a Software Developer at Aquila and Bloomberg. He also founded Clickpass and Heyzap, and was a Part-time Partner at Y Combinator.

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