Senior Frontend Developer

JR United Kingdom; Lisburn; On-site; GBP 55,000 - 75,000; Full time

Job summary

A leading technology company is looking for a Senior Front-End Engineer to join its high-performing team. You will be responsible for developing modern web applications using the latest technologies, contributing significantly to both the design and delivery processes. The ideal candidate will possess a strong foundation in coding best practices, as well as a proactive approach to mentoring others within the team.

Qualifications

• In-depth understanding of the software development lifecycle.
• Experience with TDD or BDD methodologies.
• Comfortable with thorough documentation and system-level testing.

Responsibilities

• Collaborate with technical leads to implement solutions.
• Mentor junior engineers and support development practices.
• Own delivery of complex features, ensuring performance and maintainability.

Skills

Automated testing frameworks

Web performance optimization

Front-end security best practices

Problem-solving

Tools

Material UI

Ant Design

Webpack

Vite

Figma

Storybook

AWS

C#

Job description

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We are seeking a Senior Front-End Engineer to join a high-performing technology team delivering mission-critical software for both internal trading desks and external clients. You will contribute to the design and development of modern web applications in a fast-paced Agile environment, with an emphasis on quality, scalability, and continuous delivery. You’ll collaborate within a cross-functional team focused on iterative improvement, clean architecture, and DevOps practices.

Key Responsibilities

• Collaborate with technical leads and architects to implement solutions that align with broader technology objectives.
• Mentor junior engineers and support team-wide development practices.
• Own delivery of complex features and enhancements, ensuring functionality, performance, and maintainability.
• Continuously identify opportunities to enhance delivery methods and technology choices.
• Communicate clearly with stakeholders and proactively manage blockers to ensure project timelines are met.

Required Experience & Skills

• Familiarity with component libraries such as Material UI or Ant Design.
• Experience with automated testing frameworks (e.g., Selenium, Cypress) for UI, integration, and regression testing.
• Proficient in using modern build and bundling tools such as Webpack or Vite.
• Understanding of web performance optimization and front-end security best practices.
• In-depth understanding of the software development lifecycle, including involvement from planning through delivery and post-release support.
• Pragmatic and delivery-oriented mindset, capable of context-switching across projects and meeting critical deadlines.
• Independent thinker with a detail-focused, problem-solving approach and the ability to build and validate proof-of-concept solutions.
• Comfortable with thorough documentation and system-level testing.
• Familiarity with Figma or similar design collaboration tools.
• Experience using Storybook for developing and testing UI components.
• Exposure to trading systems or understanding of capital markets.
• Knowledge of AWS and cloud-native application architecture.
• Background in C# and relational database systems.
• Experience with testing methodologies such as TDD or BDD.