React Front-End Developer

OneOcean Group Limited; United Kingdom; Remote; GBP 45,000 - 65,000; Full time

Job summary

OneOcean Group is seeking a mid-level React Front-End Developer to join our Technology team. You will design, build, and optimize responsive web applications in close collaboration with product managers and backend engineers.

You will translate complex requirements into maintainable UI components, leverage TypeScript, REST APIs, GraphQL, and Azure DevOps pipelines, and contribute to performance improvements and accessibility.

Qualifications

• Proven ability to ship production-grade React apps.
• Strong eye for UX/UI and translating designs into components.
• Comfortable in Agile/sprint environments.
• Experience with performance profiling and optimization.

Responsibilities

• Build and iterate new user-facing features using React and TypeScript.
• Craft responsive, accessible interfaces with modern styling.
• Utilize Azure DevOps for pipelines, boards and releases.
• Collaborate in a lightweight Agile framework and participate in sprint planning.
• Ensure code quality through testing, reviews and static analysis.
• Integrate front-end with REST APIs and GraphQL endpoints.
• Identify and resolve performance bottlenecks to improve Lighthouse scores.

Skills

React expert

UI/UX design

Agile mindset

Performance tuning

Tools

Azure DevOps

REST APIs

GraphQL

Job description

React Front-End Developer

Department: Technology

Employment Type: Full Time

Location: UK Remote

Description

Discover OneOcean: OneOcean is a unified brand born from OneOcean and Ocean Technologies Group. Owned by Lloyd’s Register, an organisation with more than 260 years of trust, integrity and leadership at sea, OneOcean combines the agility and ambition of a fast-moving innovator with the strength and stability of one of the world’s most trusted maritime institutions. At the heart of OneOcean is a portfolio unlike any other in maritime. A comprehensive, integrated portfolio built on years of expertise, trusted by thousands of maritime professionals around the world. Our Mission: Our mission is clear. In the race to zero emissions, our research, advisory and technical expertise and industry-firsts are supporting a safe, sustainable maritime energy transition. Today we are a leading provider of classification and compliance services to the marine and offshore industries, helping our clients design, construct and operate their assets to accepted levels of safety and environmental compliance. Why Join OneOcean Crew? Legacy & Innovation: We were created more than 260 years ago as the world’s first marine classification society to improve and set standards for the safety of ships. Global Impact: Our digital solutions are relied upon by more than 30,000 vessels, following the acquisition of OneOcean in 2022 and Ocean Technologies Group in 2024. Product Offering: Covering five proven product areas - learning, fleet operations, compliance, voyage planning and performance management - supporting its customers from ship to shore, from training and people operations, to voyage compliance and optimisation.

Navigating the position: React Front-End Developer

We have a proven concept and a solid foundation, now, we need a Mid-level React Front-End Developer to join our engineering team and help design, build responsive, high-performance web applications that deliver high quality user experiences. You will work closely with product managers, and backend engineers, to translate complex requirements into clean, maintainable, and scalable front-end solutions. This is an excellent opportunity for a developer who enjoys working on features end-to-end and staying current with the evolving React ecosystem.

Key Responsibilities

In this role, you will be a core contributor to our web platform. You will:

• Build & Iterate: Develop new user-facing features using React and TypeScript via reusable components.
• Elevate the Frontend: Use your expert knowledge of React and styling frameworks to build beautiful, responsive, and accessible interfaces.
• Automate Everything: Utilise Azure DevOps to manage your code (Repos), track your work (Boards), and ensure features are successfully deployed via automated Pipelines.
• Collaborate: Work within a loose Agile/Sprint framework, contributing to storyboarding, and regular sprint planning meetings.
• Code Quality: Ensuring high code quality through unit/UI testing, code reviews, and static analysis tools.
• Integration: Integrate front-end applications with RESTful APIs, and GraphQL endpoints.
• Performance: Resolve performance bottlenecks (Lighthouse scores, etc).

Skills, Knowledge and Expertise

You are a mid-level developer who is "hands-on" by nature, you don't want to sit in architectural meetings all day; you want to build great products.

• React Expert: You have a track record of shipping production-grade apps and understand the nuances of components, and performance tuning.
• Design-Led: You have a keen eye for UX/UI. You understand storyboards and can realise Figma designs into production-ready components.
• Tooling Savvy: You are comfortable with Azure DevOps, including managing pipelines, boards, and releases.
• Agile Mindset: You’re comfortable with the iterative nature of a growing product and can thrive in a sprint-based environment.

Must-Have Technical Stack

• Experience: Multiple years of commercial experience building and shipping production web applications.
• Core: React (v18+), TypeScript (v5+), and JavaScript (ES6+).
• Bundling: Familiarity with modern build tools & bundlers (Vite strongly preferred, Webpack experience a plus).
• Style: Responsive design, and CSS-in-JS or modern styling approaches (Bootstrap, Sass).
• Back-end: Experience consuming and integrating REST APIs.
• Testing: Jest, Testing Frameworks (ViTest, etc).
• DevOps: Azure DevOps (Pipelines & Boards).
• Performance: Familiarity with performance profiling tools.

Valued Technical Stack

• Complexity: Previous work on high-traffic / consumer-facing apps or apps with complex business logic.
• Accessibility: Exposure to web accessibility standards and testing tools
• Runtime: Basic understanding of Node.js.