Open to opportunities

Jessie Johns

@jessiejohns

Message

Full-stack JavaScript engineer building scalable web, mobile, and real-time systems.

United Kingdom

Message

What I'm looking for

I’m looking to build production-grade web and mobile products end-to-end—frontend, APIs, and real-time/async workflows—using modern JavaScript, strong validation, and reliable testing. I want to ship scalable features in a collaborative team.

I’m a full-stack JavaScript engineer with commercial experience building scalable web applications, mobile applications, and backend APIs. At Safiri, I develop responsive frontend and reusable UI components, build RESTful API endpoints, and integrate real-time updates and long-running workflows using Temporal.io and Ably.

I also bring strong testing and reliability habits, using Jest and Playwright to validate features and improve maintainability. Previously, at Hexis, I delivered frontend functionality for a coaching platform with React.js, GraphQL, and React Query/TanStack, and I’ve earned recognition through multiple competitions, including ConnectedLifeBeMyApp (first place, EUR10,000) and JISC (GBP10,000).

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Software Engineer

Current

Safiri

Jan 2023 - Present (3 years 6 months)

Develop and maintain scalable web applications, mobile applications, and backend APIs. Build booking/dispatch/logistics features with real-time updates and asynchronous workflows using Temporal.io and Ably.

Next.js TypeScript REST APIs MongoDB Mongoose Zod Shadcn Ui Material UI Bootstrap React Native Expo Redux Temporal.io Ably HTML5 Jest Playwright Docker Git GitHub

Frontend Full-Stack JavaScript Engineer

Hexis

Apr 2023 - Jan 2024 (9 months)

Developed frontend features for a coaching platform, including dashboard functionality for client management, goal tracking, meal planning, progress monitoring, and coaching workflows. Integrated frontend systems with GraphQL APIs and asynchronous data workflows.

GraphQL JavaScript Redux Jest Playwright

Computer Science Teacher

Sir John Talbot's School

Jan 2021 - Jan 2022 (1 year)

Delivered Computer Science lessons across Year 7 to Year 12 and created structured lesson plans, learning resources, and classroom activities. Adapted programming and computational thinking content for different learning abilities.

Computer Science Instruction Lesson Planning Programming Computational Thinking

IT Assistant & Support

Logixal Document Solutions

Aug 2016 - Nov 2017 (1 year 3 months)

Provided technical support across networking, infrastructure, desktop systems, and internal IT operations. Supported helpdesk request handling, remote troubleshooting, Active Directory user setup, workstation/server monitoring, and issue resolution.

IT Support Networking Infrastructure Desktop Support Help Desk Active Directory Account Management