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For Companies At a Glance
- Tasks: Build reliable backend systems for AI-driven legal services and design innovative APIs.
- Company: Join a pioneering AI-native law firm reshaping the legal industry.
- Benefits: Competitive salary, meaningful equity, unlimited AI tools budget, and remote work options.
- Why this job: Make a real impact in a cutting-edge environment with a focus on innovation.
- Qualifications: Experience in backend systems, Python proficiency, and strong API design skills.
- Other info: Collaborate with a world-class engineering team and enjoy excellent career growth opportunities.
The predicted salary is between 60000 - 84000 £ per year.
Overview
This company is building the next generation of legal services. They’re an AI-native law firm, built from day one around AI and data. Legal is a trillion-dollar global industry that still operates as if software never happened. Lawyers spend too much time on low-leverage work and too little on judgment, reasoning, and outcomes. AI is now rapidly realigning what’s possible. They believe AI doesn’t replace legal judgment – it replaces the operating model around it. Firms that rebuild around this shift will define the next era of legal services; others will struggle to justify their costs as AI reshapes client expectations. They started in April 2025 and raised a $2M pre-seed followed by a $7M seed led by a tier-1 US VC. Our product is used daily by our own lawyers on real cases, creating a tight feedback loop between product and practice. With early customers and a world-class engineering team taking shape, it’s still day one – come build with them.
About The Role
Build backend systems for AI-native legal services, focusing on reliability, extensibility, and safety in real legal work. Design APIs, data models, and agent-facing surfaces. You will build the backend systems that make this company’s product reliable, extensible, and safe to use in real legal work. These systems power everything lawyers see and trust: documents, matters, permissions, agent actions, and the workflows that tie them together. At a high level, they are building a Cursor-like environment for legal work, where lawyers collaborate with agents that can search, reason, and act on documents, while remaining auditable, reversible, and correct. The backend defines what is possible here, and what is safe. This is a product-first backend engineering role. To succeed, you’ll need to understand the full product surface and agent behavior, so you can design systems that evolve quickly without breaking under real-world usage.
What You’ll Build
- Core product APIs: Design and evolve the APIs that power the lawyer dashboard: matters, documents, chats, permissions, and email integration, so legal work stays coherent across tools, collaborators, and time.
- Data models and pipelines: Define and maintain data structures that support evolving product and agent workflows, including document state, provenance, permissions, and history. You’ll think carefully about boundaries, migrations, and long-term extensibility.
- Agent-facing backend surfaces: Build the primitives that let agents safely operate in the system: scoped permissions, state transitions, execution boundaries, and backend objects that unlock new tools and workflows without sacrificing control.
- Infrastructure and reliability: Own backend systems in production. Contribute to deployments, observability, performance, and cost awareness, while keeping the focus on product reliability rather than infrastructure for its own sake.
Requirements
- Experience in building production backend systems
- Ability to design data models and APIs
- Comfortable with Python for application logic and data engineering
- Ability to translate product goals into reliable systems
- Remote work capability with time zone overlap between GMT-5 and GMT+1
Required Skills
- Python
- API design
- Data modeling
- Backend development
- Infrastructure management
Benefits
- Competitive salary and meaningful equity
- Unlimited budget for AI coding agents and tools
- Annual company offsite in Mallorca
- Regular team gatherings in offices
- Remote work between GMT-5 and GMT+1. You can also choose to work from offices in London or New York.
Team members
- Founders
- Small group of senior engineers
Salary: 100000 - 200000 GBP
Equity: Meaningful ownership: Competitive salary and meaningful equity, with real responsibility and impact from day one.
Product Engineer (Backend) employer: TechTree
Contact Detail:
TechTree Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Product Engineer (Backend)
✨Tip Number 1
Network like a pro! Reach out to folks in the legal tech space, especially those who are already working at companies you admire. A friendly chat can lead to insider info about job openings and even referrals.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your backend projects, especially those involving Python and API design. This gives potential employers a taste of what you can do and how you think.
✨Tip Number 3
Prepare for interviews by diving deep into the company’s product. Understand how their backend systems work and think about how you can contribute to making them more reliable and extensible. Tailor your answers to show you get their mission.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in being part of the team from day one.
We think you need these skills to ace Product Engineer (Backend)
Some tips for your application 🫡
Tailor Your Application: Make sure to customise your CV and cover letter for the Product Engineer role. Highlight your experience with backend systems, Python, and API design. We want to see how your skills align with our mission of revolutionising legal services!
Showcase Your Projects: Include examples of past projects where you've built production backend systems or designed data models. This gives us a glimpse into your hands-on experience and how you tackle real-world challenges in backend development.
Be Clear and Concise: When writing your application, keep it straightforward. Use clear language and avoid jargon unless necessary. We appreciate directness and clarity, especially when it comes to technical details!
Apply Through Our Website: We encourage you to submit your application through our website. It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it shows you’re keen on joining our team!
How to prepare for a job interview at TechTree
✨Know Your Tech Stack
Make sure you’re well-versed in Python, API design, and data modelling. Brush up on your backend development skills and be ready to discuss how you've built production systems in the past. This company is looking for someone who can hit the ground running, so show them you’ve got the chops!
✨Understand the Product
Dive deep into the company's mission of revolutionising legal services with AI. Familiarise yourself with their product and think about how your role as a Product Engineer will contribute to making it reliable and extensible. Being able to articulate how you can enhance their backend systems will set you apart.
✨Prepare for Scenario Questions
Expect questions that assess your problem-solving skills in real-world scenarios. Think about how you would design APIs or manage data models under pressure. Practising these scenarios will help you demonstrate your ability to translate product goals into reliable systems.
✨Show Your Collaborative Spirit
This role involves working closely with lawyers and agents, so highlight your teamwork skills. Be ready to discuss how you’ve collaborated with cross-functional teams in the past and how you can contribute to a culture of collaboration and innovation in this new environment.
