Senior Full Stack Engineer

Orbital Witness; Greater London; Hybrid; GBP 90,000 - 110,000; Full time

Job summary

A legal tech startup in Greater London is seeking a senior fullstack engineer to lead the design and development of a legal AI Agent. The ideal candidate will have extensive frontend experience, preferably with React and TypeScript. This role offers a competitive salary range of £90,000–£110,000, along with flexible working hours and generous benefits including matched pension contributions and equity options.

Benefits

Matched pension contributions

Equity options

Flexible working hours

25 days paid holiday

Professional equipment budget

Cycle-to-work scheme

Free lunch on Wednesdays

Qualifications

• Strong background in frontend development, ideally React, TypeScript, and/or Next.js.
• Proven experience of delivering large, complex software engineering systems.
• Excellent verbal and written communication skills in English.

Responsibilities

• Own the end-to-end design and development of key features of the web application.
• Collaborate with a cross-functional team to define user stories and ship new features.
• Participate in architecture and code reviews to improve application quality and security.

Skills

Frontend development

React

TypeScript

Next.js

Problem-solving

Communication skills

Tools

Python

GIS

Job description

About us 🏢

We are Orbital 👋 an AI company on a mission to automate the legal segment of every property transaction in the world 🌍 We iterate rapidly to build products that utilise the bleeding-edge AI models. Products that are powered by the latest frontier models including OpenAI’s GPT-5, o3 and o4-mini along with others from Anthropic and Google Gemini. This places us at the forefront of THE most advanced technological advancements of our generation 🤖 We’re spearheading an unprecedented shift in how the world’s #1 asset class is transacted, globally.

Legal reasoning is a hard problem and requires some of the smartest and most experienced professionals to solve legal challenges for their clients. Because of this we will continue to push ahead and use the most intelligent and the fastest foundational models to build an AI Assistant that can provide accurate, efficient, and reliable support to legal professionals in the world of real estate.

Already the trusted ally of thousands of lawyers and commercial property professionals across the UK and US, across a diverse spectrum of blue‑chip firms and title insurers, our innovative solutions have earned accolades from the UK's magic circle law firms—Clifford Chance, Linklaters, Allen & Overy, Freshfields, and Slaughter & May—as well as renowned organisations like PwC and Marks & Spencer. Now in the early stages of an international expansion, we're continuing to expand our talented team to support our growth.

Bolstered by the support of industry giants, including some of the world's largest real estate and insurance companies such as JLL, First American Financial, and Investec and on the back of our £7.5 million Series A funding round led by Parker89 🎉 , we’re on the lookout for exceptionally talented people to join us in shaping the future of property transactions under this new evolution of technological advancement.

Our vision 🏆

We’re building an AI assistant with the expertise of a high-performing real estate associate at a law firm. We believe property deals in the 21st century shouldn’t hinge on overworked lawyers sifting through paperwork and drafting reports. It’s time for smarter, faster, tech‑driven transactions.

Our mission 💪🏽

Our mission is to help any professional or individual involved in a property transaction to properly understand what they are getting into, from the outset, before incurring legal fees.

Our values 🐸

• We are Bold & Ambitious ⚡ (changing an entire industry is hard!)
• We give Power to our People 💪 (we give exceptional people autonomy to succeed)
• We Question or Commit 🙋 (we welcome debate, but love reaching quick decisions)
• … and we Eat that Frog! 🐸 (we take on the hardest thing first)

Role Overview 🔎

We're looking to speak to frontend heavy, senior fullstack engineers, as we've launched the industry’s first legal AI Agent and have seen phenomenal growth in both revenue and usage in the last 18 months. Orbital Copilot is a new product which is delivering much needed automation in Real Estate transactions across the country and internationally, with a view to transforming the way property is transacted. We have a successful existing product which helps real estate professionals extract key information & create reports from legal documents. We’re evolving this product to add further value to our user base.

With the recent release of many Large Language Models (LLMs), such as OpenAI’s GPT-5 and o3, we’ve continued to adopt bleeding edge frontier models. This is an opportunity for someone who is passionate about learning how to utilise this in production use cases.

You’ll own the end‑to‑end design and development of key features of our web application along with the underlying services that support it. You’ll be joining a small, dynamic and fast‑paced team with a focus on quality, usability and impact. You’ll be involved in every stage of the development lifecycle; from discovery and design, through implementation to deployment, maintenance and continuous improvement. You will be supported by a cross‑functional, collaborative and growing team in delivering an impactful product, initially to lawyers and then to a wider set of B2B customers.

You’ll get a chance to: 👩💻 👨💻

• Take ownership of key technology decisions and lay the groundwork for the company’s ambitious growth plans
• Shape how we structure our frontend architecture to optimise for scale, speed of iteration and quality
• Develop, test, refactor, deploy, maintain and support production software
• Collaborate with a cross functional team (an AI product manager, legal domain experts , AI engineers and software engineers) to define user stories, quickly experiment and ship new features along with implementing both functional and non‑functional requirements
• Champion quality and reuse across the product and the codebase
• Collaborate with individuals across the business to ensure the features you develop have real business impact for customers and actually move key business metrics as we design and build a brand new product that doesn’t yet exist in the market
• Participate in architecture and code reviews to continuously improve the quality, maintainability, security and scalability of our applications
• Ensure compliance with security policies and ISO 27001 by protecting sensitive data and following secure coding practices to prevent breaches, injection, and unauthorised access.

You should apply if you: ✍️

• Have a strong background in frontend development - ideally React, TypeScript and/or Next.js
• Care about solving the technically challenging problems we’re tackling for our customers
• Value shipping early and often to get customer feedback and then iterating quickly to improve the product
• Have excellent verbal and written communication skills in English
• Have a proven track record of building user‑facing products and have the ability to put yourself in the shoes of the customer
• Have proven experience delivering large, complex software engineering systems

It would also be nice if you have:

• Have experience with Backend development - ideally Python
• Have Geospatial / mapping / GIS experience
• Experience working with LLM’s and OpenAI's API in particular
• Built or integrated with highly secure, fault tolerant APIs
• Experience building high performance, distributed systems at scale
• Proven experience of driving and using modern dev practices like BDD, TDD, 12 Factor, CI/CD

• Competitive starting salary £90,000-£110,000

• Matched pension contributions and equity options in a fast growing start‑up
• Flexible working hours and location
• 25 days paid holiday (plus bank holidays)
• Professional equipment and personal development budget along with training opportunities to learn and develop your skills
• Cycle‑to‑work scheme
• Free lunch on Wednesdays and a Deliveroo budget if you’re working late from the office
• An inclusive community enjoying all‑company off‑sites, lunches and socials