Senior Frontend Developer (Belfast)

Senior Front-End Engineer

Overview

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

• Strong experience building modern front-end applications using React , TypeScript , and JavaScript , applying reusable design patterns and principles of object-oriented development.
• Proficiency in HTML5 , React (v16 or newer) , TypeScript (v4+) , JavaScript (ES6+) , and JSX .
• Skilled in creating consistent and responsive user interfaces with attention to cross-browser support.
• 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.

Desirable Experience

• 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 .

Interested? Get in touch with Rory at roryfoster@ensorecruitment.com