Senior Fullstack Engineer (Typescript) – LegalTech

Conficio Recruitment Limited

Greater London

On-site

GBP 70,000 - 90,000

Full time

14 days+

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Benefits offered by this job

34 days off (25 days + bank holidays + birthday)

Competitive salary and meaningful equity

Private pension

Regular off-sites and socials

20% discount on legal services

Job summary

Conficio Recruitment Limited is looking for a Senior Full Stack Engineer to significantly impact the development and scaling of mission-critical systems within their AI-driven legal platform. You will work in a highly technical, product-centered team to solve complex design challenges, optimizing the performance and scalability of the system.

This role requires strong expertise in modern full-stack technologies and the ability to collaborate effectively in high-stakes environments. Benefits include competitive salary, generous time off, pension, and more.

Qualifications

Strong experience building and scaling distributed, event-driven systems.
Deep understanding of modern full-stack engineering (TypeScript, React/Next.js).
Experience with cloud-native infrastructures and CI/CD workflows.
Expertise in relational and NoSQL data systems (PostgreSQL, MongoDB, Redis).
Solid command of latency, availability, caching, and concurrency.
Experience in fast-paced, high-growth environments.

Responsibilities

Design and implement full-stack solutions.
Architect event-driven systems for scalability and performance.
Collaborate with engineering, product, and AI research teams.
Maintain observability and operational excellence in services.
Mentor engineers and uphold high coding standards.

Skills

Distributed systems expertise

Full-stack engineering

Cloud-native infrastructure

Relational and NoSQL databases

System-level concerns

Product development familiarity

Problem-solving skills

Self-taught programming or elite education

Education

Experience with AI/ML workflows

No formal degree required

Tools

TypeScript

React/Next.js

AWS/GCP

PostgreSQL

Redis

Job description

Our partner is transforming the legal industry by making high-quality legal support accessible to everyone. Through a combination of regulated human lawyers and proprietary AI, they’re reimagining how legal services are delivered—faster, cheaper, and more equitably.Their groundbreaking AI legal assistant is powered by a fine-tuned large language model (LLM) and has already passed rigorous legal qualification exams, showcasing its real‑world competence. Backed by leading US and UK investors—including Google Ventures and Balderton Capital—they recently closed a $40M Series A round, one of the top five largest in Europe for 2024.Now expanding internationally, they’re scaling both their engineering team and the complex systems that power their AI‑first platform.

The Role

We’re hiring a Senior Full Stack Engineer to have a profound impact at Feature level and to build & scale mission-critical systems at the core of our partner’s platform, with a focus on event-driven architecture, distributed system design, and AI productisation. You’ll join a deeply technical, product-focused team, contributing across the full stack—from frontend interfaces to backend infrastructure. Your role involves more than shipping features—you’ll be solving sophisticated architectural challenges, ensuring systems scale reliably under increasing load and complexity.

Key Responsibilities

Design and implement full-stack solutions across core product, AI workflows, and infrastructure
Architect and evolve event-driven systems for scalability, resilience, and performance
Collaborate closely with engineering, product, and AI research to bring complex tools to life
Shape system-wide architecture and contribute to long-term technical strategy
Ensure robust observability, testing, and operational excellence in all services
Mentor engineers and uphold high standards for code quality, security, and performance
Participate in hiring, technical decision-making, and roadmap planning

What You’ll Need

Strong experience building and scaling distributed, event-driven systems in production
Deep understanding of modern full-stack engineering (TypeScript, React/Next.js, tRPC, etc.)
Experience with cloud-native infrastructure, especially serverless, AWS/GCP, and CI/CD workflows
Expertise in relational and NoSQL data systems (PostgreSQL, MongoDB, Redis)
Solid command of system-level concerns—latency, availability, caching, concurrency
Experience working in fast-paced, high-growth environments or startups
Familiarity with product development processes; you work closely with designers and PMs
A passion for solving real user problems with elegant, scalable solutions
A track record of taking ownership and delivering significant engineering outcomes
We don't mind if you're self‑taught or from an elite university - this is about the combination of elite level programming and experience. Yes we'd love to see those from the likes of Imperial, UCL, Kings, Cambridge, Oxford, Warwick etc, however ultimately that's in vain unless you've used your talents in the real world on challenging engineering tasks.

Bonus Skills

Experience with infrastructure‑as‑code (Terraform)
Exposure to LLMs or AI/ML workflows in production
Strong opinions on architectural trade-offs in microservices vs. monoliths
Knowledge of security and data privacy best practices in regulated domains

Engineering Culture

Build for scale – We’re solving hard problems that require thoughtful, scalable engineering
Think event-first – Modern architecture is distributed, reactive, and modular
Move with urgency – We ship daily, experiment fast, and learn from data
Own your outcomes – Engineers shape the roadmap and make product‑defining decisions
Empathy-led – Deep understanding of user context is key to designing robust systems

Tech Stack