Full job description
This is a website development role working within the Go-To-Market (GTM) team.
Who we are
Healthcare needs a better rhythm: one that keeps care continuous and deeply human. Heidi is building an AI Care Partner that works alongside clinicians to make that possible.
We’re a team of doctors, engineers, designers, researchers, and creatives building tools that help clinicians stay focused on what matters most: their patients.
In just 18 months, Heidi has given back more than 18 million hours to healthcare professionals — supporting 73 million patient visits in 116 countries. Today, more than two million patient visits each week are powered by Heidi worldwide.
Backed by nearly $100 million in funding, we’re growing in the US, UK, Canada, and Europe, partnering with leading health systems including the NHS, Beth Israel Lahey Health, and Monash Health.
The Role
Join Heidi Health to build responsive, accessible user interfaces for our multi-locale healthcare platform using React, Next.js, TypeScript, and Tailwind CSS. You’ll work closely with our designer implementing pixel-perfect components while growing your skills in internationalisation, Sanity CMS Studio customisations, and modern frontend architecture.
What you’ll do
- Build Components: Develop and maintain simple, responsive UI components using React and TypeScript under guidance from senior developers.
- AI-Assisted Development: Proactively leverage AI coding tools (e.g., GitHub Copilot, Cursor, ChatGPT) to accelerate boilerplate generation, write unit tests, and troubleshoot errors while ensuring code quality.
- UI Implementation: Assist in implementing responsive designs from Figma, focusing on accurate styling using Tailwind CSS and ensuring basic cross-browser compatibility.
- Localisation Support: Assist with content configuration in our internationalisation systems (i18n), focusing on content deployment for our 10+ locales.
- CMS Assistance: Support the configuration of the Sanity CMS Studio, including content structure, basic custom input components, and maintaining editor workflows.
- Performance Support: Assist the team in optimising website performance, focusing on image optimisation, lazy loading, and initial analysis of Core Web Vitals reports.
- Tracking & SEO: Implement pre-defined analytics tracking code (GA4) and apply fundamental technical SEO best practices (e.g., meta tags, structured data).
- Collaboration: Participate in API integration discussions and assist with basic data fetching tasks.
- Code Quality: Write clean, well-commented code, adhere to team coding standards, and actively participate in team code reviews.
What we’re looking for
- 1-2 years of professional or advanced project-based frontend development experience.
- Foundational knowledge of React and modern JavaScript (ES6+).
- Familiarity with server-side rendering concepts and frameworks (Next.js preferred).
- AI Fluency: Comfortable using AI tools to explain code logic, refactor functions, and speed up daily development workflows.
- Experience with CSS frameworks (Tailwind CSS, CSS Modules, or similar) is a plus.
- Basic understanding of responsive design principles and browser debugging tools.
- Experience with Git workflows (cloning, branching, committing) and collaborative development.
- Eagerness to learn and strong communication skills for asking clarifying questions.
Preferred qualifications
- Exposure to TypeScript (or willingness to learn immediately).
- Experience with AI-native IDEs (e.g., Cursor) or effective prompt engineering for code generation.
- Familiarity with headless CMS platforms (Sanity, Contentful, or similar).
- Basic awareness of accessibility standards (WCAG) and internationalisation concepts.
- Experience in healthcare or regulated industries.
- Completed relevant projects showcasing component development and styling proficiency.
Heidi is dedicated to creating an equitable, inclusive, and supportive work environment that brings people together from diverse backgrounds, experiences, and perspectives. Our strength is in our differences. We’re proud to be an equal opportunity employer and welcome all applicants as we’re committed to promoting a culture of opportunity for all.
The way we work
1. Build to Last
We design for safety and reliability so clinicians, patients, and our teams can trust what we build every day.
2. Own Your Practice
Ideas rise on merit, not title, and everyone shares responsibility for the standards we set together.
3. Move Fast, Stay Steady
We move quickly but never at the cost of trust. Progress only matters if people can depend on what we make.
4. Make Others Better
Honest feedback, steady support, and shared growth keep our teams improving together.
Why you will flourish with us
- Real product momentum. We’re not trying to generate interest, we’re channeling it.
- Equity from day one. When Heidi wins, you win. You’ll share directly in the success you help create.
- Unmatched impact. Play a pivotal role in defining and scaling customer success at a critical growth moment – all while working on a product that delivers tangible value to clinicians and patients every day.
- Work alongside world-class talent. Join a team of operators and builders who’ve scaled unicorns.
- Global reach. Help shape our international expansion as we bring Heidi to key international markets.
- Growth and balance. Enjoy a £500 personal development budget, dedicated wellness days, and your birthday off to recharge.
- Flexibility that works. A hybrid environment, with 3 days in the office.
Liam Dubois | Blockchain Engineer
With a 5-year track record in software engineering and 2 years in Blockchain, I excel in DeFi protocol design and blockchain security. My expertise encompasses creating and managing smart contract infrastructures for DeFi applications, including yield-bearing tokens, options and leverage trading, staking vaults, and cross-chain transfers. I am also a dedicated Ethereum Security Researcher, actively engaged in bug bounty platforms.
Key Achievements
Secured a $25,000 Starknet Grant for developing Coiton, the tokenized real estate trading platform on Starknet, pioneering DeFi integration with real-world assets
Won over 5,000 KAIA tokens for developing a multichain deployer tool and Rust Nodit SDK on Kaia blockchain, significantly enhancing cross-chain deployment capabilities
Discovered critical vulnerabilities in major DeFi protocols through Code4rena audits, achieving top 6 ranking in security contests, and finding a high vulnerability in the Zaros lending and borrowing protocol.
Founded ZenGuard, an AI-powered smart contract auditing tool that received Bronze certification from Thrive, the leading decentralized grant-making protocol in crypto ecosystems.
Architected cross-chain infrastructure for DeFi strategy deployment across Optimism, Arbitrum, and BSC using Wormhole for cross-chain interoperability.
Technical Skills
Blockchain: Solidity, Rust, Smart Contracts, DeFi Protocols (UniswapV2, BalancerV2, Curve, Compound, MakerDAO)
Backend: Node.js, TypeScript, Go, Python, Nestjs, PostgreSQL, Redis, RabbitMQ,gRPC
DevOps: AWS, Terraform, Docker, Kubernetes, CI/CD, Infrastructure
Security: Smart Contract Auditing, Cryptographic Protocols, Code4rena
Tools: Foundry, Hardhat, Ethers.js, The Graph, Tenderly
Experience
Deck Finance | Blockchain Engineer Nov 2025 – Present
Secured Liquidity in Real-World Assets (RWA) Tokenized by architecting a hybrid custodial/non-custodial EVM Wallet Service using ethers.js, implementing JSON Keystore encryption (scrypt/PBKDF2) for secure, user-managed key persistence.
Reduced fiat-to-token settlement time by 33% by engineering type-safe, developer-centric SDKs (Node.js/TypeScript) that standardized EVM signing logic and abstracted complex cryptographic proof-of-ownership for RWA issuance partners.
Mitigated AML/CFT regulatory risks for RWA transactions by building a real-time KYT (Know Your Transaction) compliance engine using Python and RabbitMQ, processing transaction graphs to flag illicit or sanction-list addresses with sub-second latency.
Ensured full cross-chain portability and developer consistency by building all wallet tooling around the Polygon (EVM) network, supporting standard creation methods (Mnemonic/Private Key) compatible with any EVM-based blockchain.
Maintained >98% uptime over 2-month period for critical wallet and tokenization services by deploying a serverless microservices architecture on AWS Lambda and Docker, managed via Terraform for auditable infrastructure-as-code.
Chiss Protocol | Blockchain Engineer
Singapore, Central Region. Feb 2025 – Oct 2025
Architected and implemented core smart contract and backend infrastructure for Chiss on-chain fX protocol on Avalanche, securing $500k in ecosystem funding.
Designed and deployed Permissionless on-chain FX AMM on Avalanche, implementing a Stableswap invariant mathematical model for efficient, low-slippage swaps between NGN/USD currency pairs.
Engineered a robust, multi-algorithm off-chain oracle in Rust to feed real-time FX data on-chain. The system featured:
Advanced data aggregation methods (Median-Weighted, Time-Weighted, Custom Multi-Factor) for price integrity.
Statistical outlier detection and a confidence scoring mechanism for risk management.
Dynamic bid-ask spread calculation to assess market liquidity and trading costs.
Built scalable, high-performance backend services to power critical protocol infrastructure, including a secure webhook system and Facilitator APIs for off-ramp partners. Engineered a secure authentication system using AES-GCM encryption and PBKDF2, managed data integrity with PostgreSQL, and rate-limiting.
Collaborated across smart contract and leadership teams to ship end-to-end features, from mathematical model design to production deployment.
Slashed gas consumption by half (reducing verification complexity from O(n) to O(1)) for mass-scale token distributions by implementing a Merkle Tree airdrop mechanism, enabling trustless and cost-efficient claims for 3.1k+ users.
Reduced deployment gas costs by over 90% by utilizing the EIP-1169 Minimal Proxy pattern, saving costs in deployment fees over multiple contract instances.
Achieved reliable cross-chain transfers by designing a Wormhole interoperability architecture and building a custom, highly available Relayer service. This off-chain component monitored the target chain’s state to ensure message delivery and prevent bridge failure.
Principal Software Architect, Peeriva Oct 2023 – May 2024
Texas, USA.
Reduced query latency (from 200ms to 15ms) and eliminated expensive table scans by re-architecting the schema into a DynamoDB Single Table Design, utilizing overloaded Global Secondary Indexes (GSIs) to support complex access patterns in a single request.
Achieved sub-millisecond response times for high-traffic read paths by implementing DynamoDB Accelerator (DAX) as a fully managed in-memory write-through cache, reducing provisioned read capacity unit (RCU) costs by 40%.
Eliminated write throttling events during traffic spikes by decoupling data ingestion using DynamoDB Streams and AWS Lambda with tuned batch windows, ensuring asynchronous processing of log data without blocking the client application.
Optimized storage costs by 37% by implementing Time-to-Live (TTL) attributes for automated data expiry and utilizing Sparse Indexes to filter distinct user cohorts without incurring the cost of scanning the full dataset.
Cut cloud infrastructure costs by 45% by implementing a Terraform-managed infrastructure across AWS, optimizing EC2 auto-scaling groups and migrating to S3 Intelligent-Tiering for storage.
Education
Professional Qualifications
Web3Bridge Blockchain Development Program (January 2024 – May 2024) Advanced Blockchain Engineering Fellowship
Smart Contract Development & Security
Implemented ERC1155 token standard in Yul assembly language
Completed high-stakes security challenges: Damn Vulnerable DeFi, Ethernaut, EVM puzzles
Mastered gas optimization techniques and security best practices
Built protection against common vulnerabilities (reentrancy, tx.origin attacks, DOS)
Advanced Protocol Engineering
Deep dive implementation of UniswapV2 core contracts and Foundry
Developed expertise in Diamond Standard (EIP-2535) and delegate calls
Built upgradeable smart contracts and proxy patterns
Integrated Chainlink oracles and ENS functionality
Layer 2 & Infrastructure
Implemented cross-layer solutions and rollup contracts
Built decentralized storage solutions using IPFS/Filecoin
Developed with Ethereum Push Notification Service
Bachelor of Pharmacy (2018 – 2022)
University Of Port Harcourt, Port-Harcourt
Publications
Guide to Wormhole Cross-Chain R&D