Dayanithi Hari

Engineering leader with 13 years shipping mobile and full-stack software at scale, now building production GenAI and agentic systems. Has delivered white-label mobile apps for major fashion-retail brands (Boohoo Group) and mission-critical apps for RAC and Atkins, and independently builds LangGraph agent orchestration, RAG pipelines and LLM applications. Has hired and led multiple engineering squads across the UK and India, and is equally at home owning product or engineering agentic AI end to end.

Mobile Lead, AI at Nivo Solutions Limited (2025-02 – Present)

White-label apps shipped: The Co-operative, Together, United Trust Bank, Cambridge & Counties Bank, Ocean Finance, Pepper Money, Hitachi Capital, Scottish Building Society, Evolution Money, and 15+ more across UK lending, banking and wealth.

• Lead mobile engineering across a portfolio of 40+ white-label apps, owning architecture decisions, release management and day-to-day technical direction.
• Introducing AI-driven features into the app and working on the wider AI chatbot product (NivoBot); built AI orchestration workflows in n8n.
• Run product management for the app, shaping the roadmap and bridging business stakeholders and the development team.
• Building a brand-new white-label app on a shared UI component repository used across both mobile (React Native) and web, and introduced Maestro end-to-end tests and Storybook visual regression testing.

Tech Lead / Senior React Native Developer at Boohoo Group Plc (2021-11 – 2025-02)

Apps shipped: PrettyLittleThing, boohooMAN, Karen Millen, Warehouse Fashion, Misspap and Debenhams (iOS & Android).

• Led three mobile squads (one of them 6+ engineers) and owned the white-label roadmap that productised the PrettyLittleThing app into a reusable multi-brand platform; hired 6 engineers in India and travelled there to establish the team.
• Built and maintained these white-label apps from a single shared codebase, working with Product Owners, QA and stakeholders to resolve technical and functional challenges.
• Achieved a crash-free rate of 99.98% (iOS) and 99.92% (Android) across a user base exceeding 2 million, with a strong focus on production monitoring.
• Mentored junior developers and established best practices and coding standards that reduced development time, and improved UI/UX in ways that increased revenue and user retention.
• Contributed to a shared design system in Storybook with visual regression testing, introduced Maestro end-to-end tests, and led the transition to Expo Application Services (EAS) and the updated Expo architecture.

Senior Full-Stack Developer at NTT DATA (2019-10 – 2021-11)

Apps shipped: RAC (iOS & Android), published to the App Store and Play Store.

• Led React and React Native development for RAC and a delivery squad for Virgin Media, providing technical leadership on architecture, open-source technology choices and backend API integration.
• RAC Mobile App: Built a new RAC mobile app for Android and iOS in React Native with full offline support and Google Maps at its core. Stack: React Native,.NET Core (3.3), SQL, AsyncStorage, Google Maps, Contentstack, Cypress (E2E).
• Virgin Media Web: Migrated the Virgin Media website from AEM to Angular 10 using a Storybook-first, component-led approach. Stack: React, Angular 10, Strapi (CMS), GraphQL, MuleSoft, Storybook, GitLab CI/CD, Cypress E2E. virginmedia.com

Senior Full-Stack Developer at Atkins Plc (2013-03 – 2019-10)

Delivered full-lifecycle full-stack development across multiple internal tools and client apps, and set up and led a 4-person squad at the Global Design Centre in Bangalore, travelling to India to hire, establish and sustain the distributed team.

• Human-Centred Design Analysis Tool: Interactive platform built with architects and engineers for real-time design changes and testing variations across building components; 75% of design decisions were influenced by the tool. Stack: React, Angular, Node (REST), Plotly.js, Chart.js, Three.js, Dynamo (Revit 3D), MongoDB, Azure (Table Storage, Active Directory), Azure Linux VM.
• Space Maker Tool: Tool for engineers to design buildings on a geo-located map grid, optimise floor shapes with custom drawing tools, and convert designs into 3D objects. Stack: Vue, Vuex, Three.js, Leaflet, Bootstrap, SASS, Firebase (database, hosting, auth), Google Cloud Storage, Google Cloud Functions (REST).
• Consultation Apps: Public-consultation apps for Highways England and East West Rail, with an offline-capable iOS version and touch-screen support. Stack: PhoneGap, Angular, Mapbox, Materialize, SASS, CouchDB, PouchDB.
• Behavioural Assessment Framework: 180-degree questionnaire completed by an individual and their manager, producing a downloadable PDF report that compares responses to help project managers resource projects. Stack: Angular, Node, Express (REST), Sequelize (ORM), MySQL, Chart.js.

MSc in Advanced Computer Science – University of Leicester (2010 – 2011)

BEng in Computer Science – Anna University (2006 – 2010)