09/08/2026 updated

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Full-Stack Engineer | AI-Native Products & LLM Pipeline Engineering

Wielogłowy, Poland
Only remote
BSc Hons Computer Science (Graphics and Games), Middlesex University
Wielogłowy, Poland
Only remote
BSc Hons Computer Science (Graphics and Games), Middlesex University

Profile attachments

Keiron Gulrajani CV 2026.pdf

AI AgentsOpenAIJavaScriptAmazon CloudfrontPostgreSQLNode.jsRedisSmart ContractsNext.jsSQL DatabasesTypeScriptReact.jsAWS LambdaAWS ECSCloudflareWeb3.js
AI & LLM Pipeline Engineering
Expertise in building multi-stage LLM codegen pipelines with self-healing, evaluation harnesses, and multi-vendor failover. Proficiency with Anthropic, OpenAI, OpenRouter, Gemini, and Groq APIs, including prompt engineering, structured outputs, schema validation, and per-key cost budgeting.

Full-Stack Web Development
Strong command of React, Next.js, NestJS, Node.js, TypeScript, and Vue for building scalable full-stack applications. Experience designing REST APIs, GraphQL services, and real-time data pipelines backed by PostgreSQL, Redis, and SQS.

Blockchain & Smart Contract Development
Deep knowledge of Solidity, EVM-compatible chains (Ethereum, Base, Polygon), Hardhat, Foundry, and Ethers.js. Hands-on experience building and auditing smart contracts, writing subgraphs, and designing real-time blockchain indexers.

Cloud & DevOps
Practical experience with AWS services including ECS Fargate, S3, CloudFront, RDS, and ElastiCache. Deployment and CI/CD workflows using Docker, GitHub Actions, and Vercel, as well as production observability with structured logging and Sentry.

Mobile Development
Cross-platform mobile development using React Native with Expo, EAS Build/Submit, and Android-native development with Kotlin and Java. Experience shipping apps to the Google Play Store and building multi-tenant mobile SaaS products.

Android Development
Extensive senior-level Android development using Android Studio, Android SDK, Java, and Kotlin. Application of MVVM and MVP architecture patterns, integration of third-party libraries such as RxJava, Retrofit, Dagger, and Room, and delivery of large-scale apps for clients including BSkyB, Ford, and BBC.

Multi-Tenant SaaS Architecture
Design and implementation of multi-tenant SaaS platforms with tenant isolation using Row-Level Security, microservices backends, and cross-platform frontends. Integration of payment infrastructure via Stripe Connect and deployment on AWS ECS Fargate.

Real-Time Data Indexing
Building and maintaining real-time blockchain indexers tracking token launches and trade data. Experience with x402-compatible autonomous agents and APIs, as well as real-time state management from smart contract activity via WebSockets.

Frontend Technologies
Proficiency in React, Next.js, TypeScript, Vue, Tailwind, Three.js, and Material UI. Creation of reusable UI components, custom animations with GSAP, and NFT rendering interfaces for blockchain-based dApps.

Experience

Professional experience10+ years
Freelancer since2014

Languages

EnglishNative speakerFrenchBasic knowledgePolishGoodSpanishBasic knowledge

Project history

Founding Engineer

Meta Frontier Studio
Founding engineer building AI-native products end-to-end with full ownership from architecture through production. Responsibilities span product strategy, technical research, and cross-functional collaboration across AI tooling, DeFi, and SaaS. Projects include Shipr (AI-powered app builder), Clank.fun (memecoin trading platform on Base L2), Gudrok (x402-compatible autonomous agent and API), and Optiv (multi-tenant SaaS for sports tipsters).

Head Developer/Founder

MurAll
Founder and head developer of MurAll, an innovative digital mural platform on Ethereum and Polygon blockchains. Responsibilities included planning, architecting and building smart contracts using Solidity/Assembly/Truffle, research and development of image compression techniques, full stack development using React, TypeScript, Web3.js, and ethers.js, building the entire frontend dApp interface, integrating blockchain event listeners via WebSockets, and managing community/social growth.

Full Stack Blockchain Engineer

Chromaway
Developer as part of a large team designing and developing the Chromia relational blockchain and various dapps and libraries. Responsibilities included building relational smart contracts in Rell, full-stack development using React, TypeScript, Next.js, wagmi, ethers.js, and GraphQL, integrating OpenAI for NFT interactions, and performing security reviews of smart contracts. Projects included Originals (advanced NFT standard) and Social Agents (AI-driven NFT personalities on Chromia).

Blockchain Engineer

Clevertech
Solidity/Golang developer as part of a large team designing and developing the AliceNet decentralised layer 2 blockchain. Responsibilities included planning, architecting and building smart contracts using Solidity/Assembly, testing/deployment using Hardhat and Foundry, building blockchain node clients in Golang, and security review of smart contracts.

Smart Contract Developer

LaunchPool
Smart contract developer designing and developing the LaunchPool decentralised fundraising platform, including fungible and non-fungible tokens. Responsibilities included building smart contracts using Solidity/Truffle/Hardhat, writing and deploying subgraphs, using OpenZeppelin libraries for token creation, implementing access control, and building/maintaining the website frontend using Vue and ethers.js/Web3.js.

Senior Android Developer

BSkyB, London
Contract Android Developer role working in a large team to redesign the Sky Q/Go app and re-architect the codebase. Responsibilities included building apps using Android Studio and Android SDK (Java and Kotlin), applying MVVM/clean architecture patterns, using standard/third party libraries, writing unit and UI tests, and mentoring colleagues. Key project: Sky Q/Go for Android.

Senior Android Developer

Ford, Brentwood
Contract Android Developer role working in a large global team on the Ford Pass App project for Android. Responsibilities included building and maintaining apps using Android Studio and Android SDK (Java), applying MVP pattern, integrating Bluetooth communication between car head units and the app, and writing unit and integration tests. Key project: Ford Pass for Android.

Senior Android Developer

BBC, London
Contract Android Developer role working in a small team on the BBC Weather App project for Android. Responsibilities included building and maintaining apps using Android Studio and Android SDK (Java), integrating the Lottie animation library for vector animations, and writing tests with Robolectric and JUnit. Key project: BBC Weather for Android.

Senior Android Developer

BSkyB, London
Contract Android Developer role starting in a small Android app development team working on the official Sky Sports app for Android, then moving to a large team to work on adapting the Sky Q app codebase to produce Sky Go. Responsibilities included building apps with Android Studio using Android SDK (Java) and NDK (C/C++), integrating monetization and VOD streaming libraries, and mentoring colleagues. Key projects: Sky Q/Go for Android and Sky Sports for Android.

Android Developer

Monitise Create, London
Part of a large Android app development team working with high profile clients such as Formula E, Premier Inn Hotels, Eurasian Bank, and FIFA. Responsibilities included building apps using Eclipse and Android SDK/NDK (Java/C/C++), integrating RESTful APIs, extensively testing apps on many devices, and mentoring colleagues. Key projects: SmartBank for Eurasian Bank and Premier Inn app.

Multi-Platform Developer

Candyspace, London
Lead developer in the software development team working with high profile clients such as Samsung, Nintendo, ITV, Citroen, and Penguin Books. Responsibilities included building apps/games for multi platforms (Android/iOS, Mac/PC, Wii-U) using Eclipse, Android SDK/NDK, Unity3D, and iOS Objective C, integrating third party APIs, and mentoring colleagues. Key projects: ITV Player for Mobile, Samsung Recommends, Samsung Smart Care, and Victoria Pendleton App.

Android Developer

Pearson Education, London
Building apps for Android using Eclipse and the Android SDK, including customised apps for main phone functionality such as home/launcher, messaging app, and file manager. General research and development into Android and accompanying technologies. Key project: Field Trip - fully Pearson-branded Android phones for educational use.

Production Technician

Pearson Education, London
Responsibilities included intermediate/advanced Adobe Flash/AIR Actionscript 3.0 programming, reconstruction of products to work in online environments including Virtual Learning Environments, constructing software for CD reproduction, extensive testing of digital products, and troubleshooting technical support queries.

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