Backend Engineer (£75k + Equity) at Mayday

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

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Job Title

Backend Engineer

Salary

£75k + Equity

Company Description

Mayday is an award-winning accounting-tech startup that recently passed £1m ARR and is doubling its revenue. Founded by experienced entrepreneurs David Tuck and James Scott-Griffin and backed by elite investors, Mayday builds automation and AI to eliminate manual spreadsheet work for mid-market finance teams, serving as a category leader in the Xero ecosystem.

Job Description

You will join a high-trust engineering team to build the core infrastructure automating month-end close processes. Working closely with the CPTO, you'll ship features across a Spring Boot and Kotlin stack, solving deep accounting challenges. This role offers significant visibility, requiring a pragmatic approach to testing hypotheses and building scalable, dependable products for global customers.

Location

London, UK

Why this role is remarkable

• Join a category-leading startup that recently won Xero’s Global People’s Choice Award and has already surpassed the £1m ARR milestone.
• Work under the leadership of seasoned founders including a former CFO and a CTO with experience at Optimizely and Idio.
• Benefit from a high-trust environment where you ship directly to production and see your impact on finance teams within days.
  
  

What You Will Do

• Develop and scale next-generation accounting technology using Spring Boot, Java/Kotlin, MySQL, and OpenSearch hosted on AWS.
• Collaborate directly with the CPTO to design and implement pragmatic solutions that solve complex, real-world finance automation problems.
• Maintain and improve core product features while occasionally contributing to the React/TypeScript frontend and a Ruby on Rails application.
  
  

The ideal candidate

• You are an experienced engineer with several years of experience working in fast-paced startup environments as a backend specialist.
• You possess a strong, pragmatic problem-solving mindset and are comfortable working independently or collaboratively as tasks require.
• You have deep expertise in the JVM ecosystem (Java or Kotlin) and are eager to master the complexities of mid-market accounting.
  
  

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

How does this work?

• Jack's an AI agent for job searching and career coaching. He works for you.
• Jill is the AI recruiter working for the company. She recruits from Jack's network.
• If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
  
  

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.