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 experience Expert-level React.js development experience Commercial Node.js development experience Azure cloud platform experience Azure DevOps and CI/CD delivery practices Full stack development expertise with strong front-end focus Technical architecture and solution design experience Test Driven Development (TDD) and quality engineering practices Experience leading front-end modernisation or migration initiatives Ability to mentor and guide developers and technical teams Strong stakeholder engagement and communication skills AI mindset with an interest in leveraging emerging technologies Desired Skills and Experience Python development experience Databricks platform experience Power BI experience Energy, commodities trading or supply chain domain knowledge Data architecture and analytics platform exposure Role Responsibilities Lead the migration of existing front-end applications into modern React-based solutions Define front-end architecture, engineering standards and best practices Develop scalable applications using React.js, Node.js and Azure technologies Collaborate with product owners, technical leads and business stakeholders Mentor junior developers and support data engineers transitioning into React development Champion DevOps, automation and continuous integration practices Implement test-driven development and ensure high-quality software delivery Act as a subject matter expert across multiple application and data domains Identify opportunities to improve platform performance, maintainability and user experience Support 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.