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Senior full-stack developer with 13+ years of experience specialising in Node.js, TypeScript and React across healthtech, SaaS and crypto products. Known for taking ownership of hard, high-stakes problems (including cross-team migrations, domain invariants, database incidents and architectural decisions) and operating effectively as a senior IC or de facto tech lead. Strong preference for integration over rebuilding, clean domain modelling and maintainable codebases. Comfortable bridging product and engineering, collaborating across disciplines, and delivering safely under deadline pressure using robust testing, tracing and sound engineering practices.…Senior full-stack developer with 13+ years of experience specialising in Node.js, TypeScript and React across healthtech, SaaS and crypto products. Known for taking ownership of hard, high-stakes problems (including cross-team migrations, domain invariants, database incidents and architectural decisions) and operating effectively as a senior IC or de facto tech lead. Strong preference for integration over rebuilding, clean domain modelling and maintainable codebases. Comfortable bridging product and engineering, collaborating across disciplines, and delivering safely under deadline pressure using robust testing, tracing and sound engineering practices.

Anthony Sennett

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Senior full-stack developer with 13+ years of experience specialising in Node.js, TypeScript and React across healthtech, SaaS and crypto products. Known for taking ownership of hard, high-stakes problems (including cross-team migrations, domain invariants, database incidents and architectural decisions) and operating effectively as a senior IC or de facto tech lead. Strong preference for integration over rebuilding, clean domain modelling and maintainable codebases. Comfortable bridging product and engineering, collaborating across disciplines, and delivering safely under deadline pressure using robust testing, tracing and sound engineering practices.…Senior full-stack developer with 13+ years of experience specialising in Node.js, TypeScript and React across healthtech, SaaS and crypto products. Known for taking ownership of hard, high-stakes problems (including cross-team migrations, domain invariants, database incidents and architectural decisions) and operating effectively as a senior IC or de facto tech lead. Strong preference for integration over rebuilding, clean domain modelling and maintainable codebases. Comfortable bridging product and engineering, collaborating across disciplines, and delivering safely under deadline pressure using robust testing, tracing and sound engineering practices.

Available to hire

Senior full-stack developer with 13+ years of experience specialising in Node.js, TypeScript and React across healthtech, SaaS and crypto products. Known for taking ownership of hard, high-stakes problems (including cross-team migrations, domain invariants, database incidents and architectural decisions) and operating effectively as a senior IC or de facto tech lead.

Strong preference for integration over rebuilding, clean domain modelling and maintainable codebases. Comfortable bridging product and engineering, collaborating across disciplines, and delivering safely under deadline pressure using robust testing, tracing and sound engineering practices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Advanced

Work Experience

Senior Full-Stack Engineer at Birdie

April 1, 2023 - June 30, 2026

Built and evolved a healthtech platform serving hundreds of thousands of elderly care recipients and carers across the UK, processing millions of care visits. Worked across an event-sourced microservice estate using Node.js, TypeScript, React, Golang, PostgreSQL, AWS, and Kubernetes. Owned complex cross-team initiatives including an AWS SDK v2→v3 migration across multiple repositories, end-to-end integration test foundations (including LocalStack), and domain-critical medication conflict detection to enforce clinical invariants. Researched and mitigated PostgreSQL TXID wraparound risk on a 20TB+ event sourcing table, restoring headroom via tuned vacuum/reindex and batched deletion strategy. Led a hybrid micro-frontend approach to unblock a hard-deadline V2 launch by mounting legacy components into a new UI shell. Also designed integration testing for a new Golang microservice with migrations, authenticated request helpers, and CI pipeline adoption.

Full-Stack Developer at oasis.app

November 1, 2021 - April 30, 2023

Early-stage DeFi startup built on the Maker Protocol. Delivered full-stack features across a Next.js/TypeScript frontend and Postgres/Node backend within a distributed product team. Contributed to v2 of the core app to enable users to navigate between crypto positions and Oasis products for the first time (major UX improvement). Led technical spikes and planning to de-risk complex blockchain integrations and shared findings via structured documentation, working with RxJS, Postgres, and direct blockchain APIs (Maker Protocol via Infura).

Senior Developer at Day Out With The Kids

June 1, 2019 - January 31, 2020

Migrated a legacy agency-managed Umbraco site to a modern internally maintainable Node.js stack, enabling the product team to own future development. Delivered a full platform migration to a Heroku/Node.js/Postgres stack within a small team on time. Improved performance to sustain 10 data-heavy page loads per second via targeted query optimisation and Redis caching. Established the technical foundation (Express, Sequelize, Redis) that enabled an internal engineering function going forward.

Multiple Roles at Typeform

January 1, 2014 - January 31, 2019

Joined as one of the first employees (~12) and grew through company expansion to ~200+. Worked across engineering and product leadership responsibilities. Built and maintained legacy and greenfield projects, acting as IC and de facto team lead as needed. Contributed to technical direction as codebases scaled. Proposed and initiated a full renderer rewrite using a modern toolchain. Led design and delivery of seamless embed mode based on customer feedback. Project-managed GDPR 'right to erasure' across a microservice architecture involving multiple teams, delivering by statutory deadline with minimal disruption.

Analyst Developer at Enlighten Designs

August 1, 2011 - January 31, 2014

Software design agency (New Zealand). Worked on outsourced projects individually and as part of a team, then contributed to a large-scale modernisation programme. Worked with Microsoft stack: C#, .NET MVC, SQL Server, Windows Services, TDD, and CI. Part of a group of five agile teams simultaneously refactoring a monolith along business domains and bringing a flagship farm automation product to the web.

Web Developer at Dolphin Music

May 1, 2010 - August 31, 2011

Customer-facing e-commerce site and internal warehousing systems using a LAMP stack, plus technical support responsibilities.