Mid/Senior Full Stack Software Engineer – React/Javascript

Solas IT Recruitment; Leinster; On-site; EUR 90,000 - 130,000; Full time

Job summary

The client is a globally recognised fintech organisation delivering high-performance, low-latency software for real-time trading platforms. This Mid-Senior Full Stack Software Engineer role focuses ~70% front-end (React, TypeScript) and ~30% back-end (Java) in an agile team.

You'll design responsive web applications, build RESTful APIs and WebSockets, work with PostgreSQL/MySQL, and collaborate to improve software quality, performance and scalability while solving technically challenging

Qualifications

• 5+ years of commercial software engineering experience.
• Strong frontend focus with React and TypeScript.
• Backend experience in Java and REST APIs.
• Experience with WebSockets and real-time data.
• Proficient with PostgreSQL/MySQL and SQL design.
• Familiarity with Git and modern development practices.

Responsibilities

• Design and develop modern, responsive web applications using React and TypeScript.
• Build intuitive UIs for real-time data.
• Develop scalable backend services using Java.
• Design and integrate RESTful APIs and WebSocket services.
• Work with relational databases like PostgreSQL/MySQL.
• Collaborate in an Agile team to improve software quality and performance.

Skills

React

TypeScript

Java

REST API

WebSocket

PostgreSQL

MySQL

Git

Agile

Python

Tools

React

TypeScript

Java

PostgreSQL

MySQL

Git

Job description

What's on offer - Excellent Salary + Outstanding Bonus + Exceptional Benefits

About the Company

Our client is a globally recognised financial technology organisation at the forefront of their market. They develop high-performance, low-latency software that powers sophisticated trading platforms used across international financial markets. With technology at the heart of the business, you'll be joining a collaborative engineering environment where innovation, technical excellence and continuous improvement are genuinely valued.

The Opportunity

This is an exceptional opportunity for a talented Mid-Senior Full Stack Software Engineer to join a highly regarded engineering team building the next generation of real-time trading applications. Unlike many Full Stack positions, this role has a strong emphasis on creating modern, intuitive user experiences, with approximately 70% of your time focused on Front End development and 30% on Back End engineering.

What You'll Be Doing

• Design and develop modern, responsive web applications using React and TypeScript.
• Build intuitive user interfaces capable of handling complex real-time data.
• Develop scalable backend services using Java.
• Design and integrate RESTful APIs and WebSocket services for live data streaming.
• Build high-performance applications capable of processing large volumes of real-time information.
• Work with relational databases including PostgreSQL and MySQL.
• Contribute to architecture discussions and continuously improve software quality, performance and scalability.
• Collaborate within an Agile engineering environment focused on delivering high-quality software.

What We're Looking For

We're looking for engineers who are passionate about building exceptional software and enjoy solving technically challenging problems.

You'll ideally have:

• 5+ years' commercial software engineering experience.
• Commercial backend development experience using Java.
• Experience designing and consuming REST APIs and WebSockets.
• Experience working with SQL databases such as PostgreSQL or MySQL.
• Solid understanding of object-oriented programming and software design principles.
• Experience using Git and modern development practices.
• Python experience would be beneficial.
• An interest in financial markets or trading technology would be advantageous.