Join Mercury as a Software Engineer to build and evolve LLM-powered financial products in a dynamic startup environment.
Posted by employer 21 hours ago
First seen on Joblaze 1 hour ago
Last verified on the company career page 1 hour ago
Skills & Technologies
What you'll build
- Ship new capabilities users love
- Help design and ship new Command skills
- Build tests that prove capabilities work correctly
- Work with product and compliance teams
- Evolve and extend product capabilities
Must have
- 1-4 years of backend or full-stack development experience
- Knowledge of or excitement to learn Haskell, React, TypeScript, and Redux
- Experience building LLM powered products
Nice to have
- Empathizes with users
- Can balance tradeoffs and find creative solutions
- Actively incorporates AI tools into their workflow
AI in the day-to-day
Actively incorporates AI tools into their workflow and is excited about leveraging them to amplify their impact.
Requirements
- Experience
- 1–4 years
Not disclosed in this posting: visa sponsorship.
Benefits
Joblaze summary
In this role, the Software Engineer will focus on enhancing Mercury's LLM-powered financial assistant, Command, by developing new features and ensuring they meet user needs. Proficiency in backend or full-stack development, along with familiarity or willingness to learn technologies like Haskell, React, TypeScript, and Redux, is essential. This position is ideal for someone with 1-4 years of experience who thrives in a startup environment and is eager to contribute to product development. The team is small and experienced, emphasizing collaboration and adaptability as they refine their innovative financial solutions.
Joblaze insights
- Listed today — first seen on Joblaze October 24, 2026. Last confirmed on Mercury's careers page October 24, 2026.
- Salary band is below the typical range for Backend roles (median ~$180,000).
- Starts above 9% of 22 comparable mid backend roles in United States that list TypeScript we track (median $150,000 across 17 companies). See TypeScript salary trends
- TypeScript appears in 20.8% of 260 comparable mid backend roles in United States; React appears in 10% of 260 comparable mid backend roles in United States.
Quick facts
- Is the Software Engineer - Mercury Command role remote?
- It's hybrid — Mercury expects some on-site time in San Francisco, CA, United States.
- What's the salary range?
- Mercury lists $122,400–$176,000 for this role.
- How much experience is required?
- 1–4 years of relevant experience for this Software Engineer - Mercury Command role.
- Where is the role based?
- Mercury is hiring for this position in San Francisco, CA, United States.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: Haskell, React, Redux, TypeScript.
- What seniority level is this role?
- Mercury targets mid-level candidates for this position.
- Is this full-time or contract?
- Full-time for this Software Engineer - Mercury Command role at Mercury.
From the original posting
In 1965, an engineer in Scotland was given a mundane task with a tricky problem to it - banks wanted to close on Saturdays and still serve customers, but they didn’t know how to solve authentication of the right user. James Goodfellow, working at Smiths Industries, uncovered the insight that you needed something you have (a card) and something you know (a PIN). Because someone told him they could only remember 4 digits instead of his proposed 6, today over 3 million ATMs use a card+4 digit PIN over 60 years later.
Like the ATM, Mercury is building technology that pushes forward financial interfaces for the long term. Command is Mercury's LLM-powered financial assistant, launched to all customers in June 2026. It lets users understand their finances and take action in plain language, from asking about cash flow to sending payments, issuing cards, and managing invoices. With the product now in customers' hands, the work is to evolve it, extend its capabilities, and find new ways to leverage LLMs to give Mercury customers a more powerful banking* experience.
What You'll Do:
- Ship new capabilities users love
- Feel a strong sense of product ownership and actively seek responsibility – help design and ship new Command skills
- Partner with product and compliance teams to define what "working correctly" means for each new capability, then build the tests that prove it
- Join a small but mighty team of experienced product and AI engineers building the future of Mercury
- This list is illustrative. Command is a product in motion and priorities will shift as we learn. The right person should be comfortable working in ambiguity, in a scrappy startup environment
The Ideal Candidate:
- Has 1-4 years of backend or full-stack development experience, with knowledge of or excitement to learn Haskell, React, TypeScript, and Redux
- Experience building LLM powered products
- A builder who is passionately product-minded and has experience building and shipping new products
- Empathizes with users and can channel their perspective to build lovable products
- Can balance tradeoffs and find creative solutions to accomplish goals
- Actively incorporates AI tools into their workflow and is excited about leveraging them to amplify their impact — whether that's accelerating development, improving code quality, or finding creative solutions to hard problems
If this role interests you, we invite you to explore our public demo at demo.mercury.com.
#LI-RA1
Total Rewards
The total rewards package at Mercury includes base salary, equity (stock options/RSUs), and benefits.
Standard company text repeated across Mercury's postings is omitted here.