Senior Frontend Developer - React

Role Summary Aubay UK is seeking a Senior Front End Engineer – React focused to join a long-term contract engagement supporting a large-scale data and analytics transformation programme within the energy sector. The role is focused on leading the migration of existing front-end applications into modern React-based solutions, establishing technical standards, mentoring developers, and delivering high-quality applications using React, Node.js, Azure and DevOps practices. The successful candidate will drive technical delivery across mission-critical data products and platforms that support trading, supply and operational business functions. Type of Role Permanent or Contract, 12 months+, Inside IR35 Location and Travel Location: London, Waterloo Working Pattern: Hybrid (3 days per week onsite) Travel: No travel required Required Skills and Experience 10+ years of software engineering experienceExpert-level React.js development experienceCommercial Node.js development experienceAzure cloud platform experienceAzure DevOps and CI/CD delivery practicesFull stack development expertise with strong front-end focusTechnical architecture and solution design experienceTest Driven Development (TDD) and quality engineering practicesExperience leading front-end modernisation or migration initiativesAbility to mentor and guide developers and technical teamsStrong stakeholder engagement and communication skillsAI mindset with an interest in leveraging emerging technologies Desired Skills and Experience Python development experienceDatabricks platform experiencePower BI experienceEnergy, commodities trading or supply chain domain knowledgeData architecture and analytics platform exposure Role Responsibilities Lead the migration of existing front-end applications into modern React-based solutionsDefine front-end architecture, engineering standards and best practicesDevelop scalable applications using React.js, Node.js and Azure technologiesCollaborate with product owners, technical leads and business stakeholdersMentor junior developers and support data engineers transitioning into React developmentChampion DevOps, automation and continuous integration practicesImplement test-driven development and ensure high-quality software deliveryAct as a subject matter expert across multiple application and data domainsIdentify opportunities to improve platform performance, maintainability and user experienceSupport delivery of robust, reusable and monitored data products aligned to business objectives Client Description Our client is one of the Super Major global energy companies with around 84,000 employees across 70+ countries who are working to power progress through cleaner energy solutions. Specialties include Upstream, Downstream, Bio-Fuels, Integrated Gas, New Energies, Chemicals, Energy and Trading. You will have the opportunity to work in a challenging but rewarding environment that is fast-paced and changing fundamentally, supporting the transformation of a global energy business while delivering value across business lines and geographies. About Aubay Aubay UK is a trusted IT insourcing and business scaling partner, helping organisations deliver transformation through high-performing teams, offering roles across London, the West Midlands and Belfast. Based in Canary Wharf, we take on a people-first approach, enabling IT consultants to work on meaningful projects across the Energy, FinTech, and Financial Services sectors, while building stable careers, gaining valuable project exposure and benefitting from long-term development in a supportive working environment. Built on reliability and partnership, and backed by a wider global Aubay Group network of more than 9,000 experts, we offer a low-risk, high-value delivery model.