Senior Backend Engineer

SeedLegals; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

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Pension

Private healthcare

25 days annual leave

Birthday off

Job summary

SeedLegals is seeking senior backend developers to join a global, cross-functional team near Old Street in London with hybrid/remote options. You will mentor junior engineers, drive architecture decisions, and contribute to a codebase focused on social investment features, AI-enhanced products, and legal template generation.

The team is international, about 20+ developers from 12 countries, reporting to the Director of Engineering.

Qualifications

• Experience with JVM languages (Kotlin) and Spring framework.
• Strong backend architecture and API design skills.
• Commitment to code quality, testing, and peer reviews.

Responsibilities

• Mentor and guide junior developers within the team.
• Make architecture and design decisions for backend systems.
• Build high-performance RESTful APIs and services.
• Collaborate cross-functionally on AI-enabled features and workflow tooling.

Skills

Kotlin

Spring

API design

Code review

Test-driven development

Job description

SeedLegals is the leading provider of automated legal solutions for startups, with offices in London, New York and Paris. Since launching in 2016, we’ve supported over 75,000 startups who have collectively raised more than £2bn on our platform.

We’re a Series A company backed by Index Ventures, on a mission to make entrepreneurship more accessible and scalable.

Our values are key to our success; here at SeedLegals, we:

• Invest and trust in each other;
• Are committed to a growth mindset;
• Embrace diversity and cultivate inclusion;
• And are driven by customer success.

About the Role

We're seeking talented senior backend developers to join our team. You'll play a pivotal role in mentoring more junior developers, decision making on architecture, and contributing to our code base. Working in a scrum team alongside 6-8 engineers, a UX designer, and a Product Manager, you'll have autonomy to drive innovation in areas like social investment features, document and workflow management, products enhanced with AI, and legal template generation. Teams are managed from within and report directly to the Director of Engineering, so you'll be working alongside with your manager to solve technical problems.

This is a unique opportunity to gain extensive knowledge of the startup world, VC fundraising, investor tax schemes, and more. As you work on complex projects, you'll also gain invaluable domain knowledge that will prepare you for entrepreneurship yourself.

About the Team

We're an international team of around 20+ developers from 12 countries based in the UK and France, with a hybrid working model that allows for flexibility and collaboration. While each team meets fortnightly at our offices near Old Street to whiteboard, plan, and socialise, you'll also have the freedom to work remotely.

We’d love to hear from you if...

• You love solving challenging problems
• You love building high-performance APIs
• You love working with AI agentically
• Have experience working with, and enjoy working with JVM languages (Kotlin), and Spring
• You know how to provide a great PR review
• You have experience with software engineering best practices, like test-driven development, and have a deep appreciation for what good code looks like
• You own and take pride in contributing to all stages of development

And if you can hit one or two of these as well, even better...

• You have some personal projects on the go (maybe you write a blog, help with friends' websites, contribute to open source projects etc.)
• You've worked with LLMs such as Claude, and written your own plugins/skills/agents
• Through your work, you have started looking more into secure coding practices, and write secure code from first principles
• You have a deep understanding of how to monitor web applications, including agentic micro-services
• You understand what a product engineer is, and lean into it
• You believe in the agile manifesto

Why join SeedLegals:

You’ll join a friendly, motivated and multicultural team of founders, investors, developers and growth hackers. We’re based near Old Street, in the heart of London.

• Share options: the option to buy shares in SeedLegals via our performance-based share option scheme
• Contributory pension, private healthcare, critical illness cover + life insurance
• 25 days annual leave + bank holidays + your birthday off
• Buy and Sell Annual Leave Scheme
• Flexible working - hybrid/remote model with London office access
• Weekly allowance for a free lunch in the office
• £250 working-from-home allowance to set up your home office
• Annual learning budget for training courses, conferences and books
• 3 paid work days per year for volunteering
• Access to Happl - with monthly flexible spend on wellbeing
• Cycle-to-work scheme
• Free lunch in the office once per week

Our Interview Process:

1. 30min initial call (video call)
2. Up to two 1hr technical interviews. Here, we'll ask you to work through designing a solution to a real world technical challenge we've faced, as well as some questions about your experience with backend code in production environments.
3. 30min interview with Anthony Rose, our CEO