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Mercury Aircraft

60 Mercury Senior Software Engineer Jobs Hiring Near You

mercury

Software Engineer

Huntsville, AL · On-site

It's an excellent opportunity for an experienced software, electrical, or firmware engineer with ... Mercury Systems is a technology company that makes the world a safer, more secure place. We push ...

Posted today

Mercury

Software Engineer - Product

San Francisco, CA · On-site +1

$122K - $158K/yr

... of controlling an aircraft into a more graceful and manageable endeavor. At Mercury, we are ... Our product engineering group is growing and we're looking to hire backend and full-stack engineers.

Mercury

Senior Full-Stack Engineer

San Francisco, CA · On-site +1

$166K - $208K/yr

... of controlling an aircraft into a more graceful and manageable endeavor. At Mercury, we are ... We want to transcend the status quo for banking and fintech software, and many of our customers are ...

Mercury

Senior Software Engineer - SRE

San Francisco, CA · On-site +1

$200K - $250K/yr

While we appreciate the charm of ancient things, Mercury is engineering the future of banking*. "Quaint" and "archaic" are not values we seek in our systems. Rebooting a tumbling server and hoping a ...

New

Mercury

Senior Backend Engineer - Product

San Francisco, CA · On-site +1

$166K - $208K/yr

... of controlling an aircraft into a more graceful and manageable endeavor. At Mercury, we are ... We want to transcend the status quo for banking and fintech software, and many of our customers are ...

Mercury

Software Engineer - Infrastructure

San Francisco, CA · On-site +1

$203K - $241K/yr

The Infrastructure team at Mercury is an enablement lever for the rest of the business, building ... We are looking for an engineer to join our team to help build out the "platform" even further! We ...

mercury

Senior Mechanical Engineer

Torrance, CA · On-site

$108K - $143K/yr

Mercury Systems is seeking the best and brightest engineering talent to help us deliver cuttingedge ... Proficiency with 3D CAD software such as SolidWorks or CREO * Broad knowledge of both conventional ...

mercury

Senior Substrate Layout Engineer

Phoenix, AZ · On-site

Mercury Systems is seeking the best and brightest engineering talent to help us deliver cuttingedge ... In this role, our team is looking for a Senior Substrate Layout Engineer who will lead complex HDI ...

mercury

Sr. Principal Systems Engineer

Hudson, NH · Hybrid

Mercury Systems' Integrated Process Solutions (IPS) Line of Business (LOB) offers an exciting leadership opportunity for a Sr. Principal Systems Engineer who wants to expand your influence, own ...

mercury

Systems Security Engineer (SSE)

Hudson, NH · On-site

Mercury Systems is looking for the best and brightest talent to help bring cutting-edge technology ... including hardware/software protections, secure boot, and encryption. * Experience with ...

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Mercury Aircraft Jobs Information

What is it like to work at Mercury?

Mercury is a technology-driven company that values innovation, collaboration, and a fast-paced work environment. The company's team structure is designed to foster a sense of community, with employees working closely together across various departments to drive mission success, and its offices often feature open layouts and modern amenities. Working at Mercury may appeal to candidates who are passionate about technology and problem-solving, as the company offers opportunities to work on cutting-edge projects and contribute to its mission of advancing the field of technology.

What makes Mercury an attractive place to work?

Mercury is a well-established and respected company in its industry, known for its commitment to innovation and customer satisfaction. The company's workplace culture values collaboration, flexibility, and continuous learning, providing employees with opportunities to grow professionally and contribute to meaningful projects. Joining Mercury offers the chance to be part of a dynamic team that drives progress and innovation, with opportunities for career advancement and personal development in a fast-paced and challenging environment.

What other companies are hiring for Senior Software Engineer jobs?

What are the most popular jobs at Mercury?

Senior Software Engineer - Mercury Command

San Francisco, CA • On-site, Remote

Mercury
See more jobs at Mercuryexternal

$144K - $190K/yr

Full-time

Re-posted 15 days ago

Key responsibilities

  • Design and ship new Command skills and domain-specific instruction sets for workflows like sending money, managing invoices, and understanding cash flow

  • Build and define agentic workflows in Command, including architecture for multi-step agent interactions and tool schemas with backend teams

  • Maintain and evolve Command's prompt architecture, tune model behavior, and ensure the reliability and quality of new capabilities through testing and monitoring

Job description

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 the authentication of the right user. James Goodfellow, working at Smiths Industries, uncovered the insights 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:
  • Design and ship new Command skills, the domain-specific instruction sets that teach the model how to handle workflows like sending money, managing invoices, and understanding cash flow
  • Design and build agentic workflows in Command, defining the architecture for how multi-step agent interactions should work as we extend what the product can do on a customer's behalf
  • Work with backend teams to define tool schemas for new capabilities, shaping the data contracts between Mercury's business logic and the model
  • Own new capabilities end to end, from the system prompt to the frontend component that renders the response

Own the LLM layer:
  • Maintain and evolve Command's prompt architecture: the system prompt, skill loading system, session context, and the policy and compliance layers underneath
  • Tune model behavior: reasoning effort, prompt caching strategy, fallback chains, and the streaming patterns that make the product feel fast
  • Stay current with how models are evolving and bring that knowledge back to how Command is built

Build quality in:
  • Write and expand Command's eval harness, adding cases that cover new capabilities and scoring rubrics that detect regressions before users do
  • Partner with product and compliance teams to define what "working correctly" means for each new capability, then build the tests that prove it
  • Own the reliability and quality of what you ship, from initial design through post-launch monitoring

This list is illustrative. Command is a product in motion and priorities will shift as we learn. The right person will help choose the next highest-leverage work.
The ideal candidate
  • Has 7 or more years of software engineering experience, with deep technical expertise building and scaling LLM-powered applications in production
  • Has gone beyond shipping a first version: you have scaled an LLM-powered product, dealt with the reliability and performance problems that come with real usage, and made it better over time
  • Has experience designing agentic systems and has opinions about how to architect multi-step workflows that are reliable, explainable, and safe to run on behalf of real users
  • Has built eval infrastructure and can write cases that actually measure whether the product works, not just whether the model outputs something plausible
  • Understands the real tradeoffs in LLM deployments: latency, cost, compliance, and what breaks in production that doesn't show up in demos
  • Has opinions about what makes an AI product trustworthy, not just impressive, and can build toward that bar
  • Is comfortable with TypeScript and willing to learn Haskell for backend tool work, or already comfortable with both
  • Can work across the full stack of an AI product, from the system prompt to the streaming frontend
  • Has a track record of mentoring engineers and raising the technical bar of their team

If this role interests you, we invite you to explore our public demo at demo.mercury.com.
*Mercury is a fintech company, not an FDIC-insured bank. Banking services provided through Choice Financial Group and Column N.A., Members FDIC.
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.
#LI-RA1
Total Rewards
The total rewards package at Mercury includes base salary, equity (stock options/RSUs), 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:
US employees (any location):
$200,700-$250,900 USD
Canadian employees (any location):
$189,700-$237,100 CAD

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