Full Stack Engineer

Dex; Greater London; On-site; GBP 110,000 - 170,000; Full time

Job summary

Dex is partnering with a market-leading firm to build an institutional-grade client platform for digital asset markets. You will own the stack from backend services in Go or Python to a React frontend handling real-time WebSocket streams.

This role emphasizes low-latency, high-throughput design with production-grade AWS deployments within a tight, engineering-first team.

Qualifications

• 5+ years of full-stack software engineering experience shipping production systems.
• Experience designing high-throughput REST and WebSocket APIs.
• Strong proficiency in TypeScript, React, and real-time data rendering in the browser.
• Experience with relational schema design and production cloud infrastructure on AWS or equivalent clouds.

Responsibilities

• Architect and ship a greenfield client platform end-to-end.
• Design backend services and APIs in Go or Python for high-throughput data.
• Build real-time web UIs in TypeScript/React with WebSocket streams.
• Design relational schemas and ensure data security and isolation.
• Own production deployments on AWS, containers, CI/CD, and monitoring.

Skills

Go backend

Python backend

TypeScript

React

WebSockets

AWS

Tools

PostgreSQL

Docker

CI/CD

Job description

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process.

Dex is an AI recruiter agent that helps you run your job search. Tell Dex your stack, seniority, and what you want to build. We will manage your applications and surface other opportunities that are a fit.

The role

A leading algorithmic market maker providing core liquidity across digital asset markets globally, operating at institutional scale across centralised and decentralised venues. The firm pairs high-frequency trading performance standards with the autonomy and deployment velocity of a tight, engineering-first team.

You will join the product engineering team to build a core institutional client platform from scratch, alongside internal trading tools and client portals. This is complete vertical ownership - modelling market data, writing performant Go or Python services, and rendering low-latency WebSocket streams in React - not skinning templates or gluing together third-party SaaS tools.

The work

• Architect and ship a greenfield client platform from the ground up, owning features end to end across the entire customer lifecycle.
• Design and implement resilient backend services and APIs in Go or Python, handling high-frequency market data and live order flow.
• Build high-density, real-time web applications in TypeScript and React that cleanly handle WebSocket data streaming directly to the browser.
• Design robust relational schemas, optimize complex queries, and enforce institutional security standards around authentication, authorization, and data isolation.
• Own your code in production, managing cloud infrastructure on AWS, containerized deployments, CI/CD pipelines, and active monitoring.

What You Bring

• 5+ years of full-stack software engineering experience shipping production systems across both backend services and modern frontends.
• Strong backend fundamentals in Go or Python, with hands‑on experience designing high-throughput REST and WebSocket APIs.
• Deep proficiency with TypeScript, React, and rendering real-time streaming data cleanly in the browser.
• Demonstrated ownership of relational schema design, query optimization, and production cloud infrastructure on AWS or equivalent major clouds.

Why apply through Dex

Engineering seats at tier‑one market makers are notoriously hard to access without getting lost in third‑party recruiter noise or generic talent pipelines. Applying through Dex skips the cold queue, matches you directly against the team's technical bar, and gives you an unvarnished briefing on the stack and interview roadmap before you speak with them.

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