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For Companies At a Glance
- Tasks: Lead a critical upgrade project for legacy Ember applications in a remote setting.
- Company: Join a well-established financial services product business making impactful upgrades.
- Benefits: Enjoy fully remote work and flexible engagement outside IR35.
- Why this job: Be part of a focused engineering team modernising essential applications with cutting-edge tech.
- Qualifications: 5 years of Ember.js experience and solid Node.js knowledge required.
- Other info: Engagement lasts 2-3 months, starting on 21st July 2025.
- Location: Remote (UK)
- Duration: 2-3 months
- Start: 21st July 2025
- Engagement: Outside IR35
- 5 Years ember experience required (Minimum requirement)
The Opportunity
A well-established financial services product business is looking for a Senior Ember.js Engineer to lead a critical upgrade project across its legacy Ember applications. These applications are part of a wider FX payments back-office platform, with components that have not been updated in several versions and are now reliant on unsupported versions of Ember.js and Node.js.
This is a focused engineering engagement. You’ll work within a mono-repo ecosystem, modernising the codebase, resolving dependencies, and ensuring successful delivery of a clean, stable, and production-ready upgrade.
What is Required.
- Working closely with internal engineering leadership and DevOps support, you will:
- Upgrade Ember.js from ~v3.20.5 to Ember 6.x (Octane) .
- Upgrade Node.js to v20+ across all associated packages.
- Migrate and validate shared packages within a monorepo (Lerna/Yarn Workspaces).
- Run and maintain comprehensive test coverage (unit, integration, and UAT).
- Identify and deprecate outdated libraries and plugins.
- Optionally consolidate “common” and “domain-common” packages into a single repo (without impacting delivery timelines)
Tech Stack:
- Frontend : Ember.js (Octane), Glimmer, Handlebars
- Tooling : Lerna, Yarn Workspaces, ESLint, Prettier
- Testing : QUnit, qunit-dom, ember-qunit
- CI/CD : AWS Amplify
- Auth : Keycloak (OAuth2 integration)
- Languages : TypeScript, JavaScript
- Misc : Ember Engines, Babel, Sass, ember-auto-import, ember-fetc
Skill-Set
- Deep experience upgrading and maintaining Ember.js applications (ideally 3.x → 5.x/6.x).
- Solid grasp of Node.js environments and version migrations (especially v20+).
- Familiarity with monorepo structures , including Lerna and Yarn Workspaces.
- Experience working with Ember Engines and component libraries.
- Strong testing mindset – you’ve worked with QUnit or equivalent test runners in Ember.
- Good communicator – able to work autonomously and update stakeholders clearly.
Deliverables
- Technical Upgrade Plan
- Comprehensive Test Plan and Cases
- Clean builds and validated UAT release
- Post-upgrade performance and stability report
Contract Role: Senior Ember.js Engineer Outside IR35 Fully Remote employer: Halian
Contact Detail:
Halian Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Contract Role: Senior Ember.js Engineer Outside IR35 Fully Remote
✨Tip Number 1
Familiarise yourself with the latest Ember.js features, especially those introduced in version 6.x. Being able to discuss these updates and how they can benefit the project will show your expertise and enthusiasm for the role.
✨Tip Number 2
Brush up on your knowledge of Node.js, particularly version 20+. Understanding the nuances of this upgrade will be crucial, so consider exploring any recent changes or best practices that could impact the migration process.
✨Tip Number 3
Gain a solid understanding of monorepo structures, specifically Lerna and Yarn Workspaces. Being able to articulate how you’ve successfully managed dependencies in a similar setup will demonstrate your capability to handle the project's requirements.
✨Tip Number 4
Prepare to discuss your testing strategies, particularly with QUnit or similar frameworks. Highlighting your strong testing mindset and how it contributes to maintaining code quality will resonate well with the hiring team.
We think you need these skills to ace Contract Role: Senior Ember.js Engineer Outside IR35 Fully Remote
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with Ember.js, especially any upgrades you've managed. Include specific projects where you've worked with Node.js and monorepo structures like Lerna and Yarn Workspaces.
Craft a Strong Cover Letter: In your cover letter, emphasise your deep experience with upgrading Ember.js applications and your familiarity with the required tech stack. Mention your ability to work autonomously and communicate effectively with stakeholders.
Showcase Relevant Projects: If you have a portfolio or GitHub repository, include links to relevant projects that demonstrate your skills in upgrading applications and maintaining test coverage. This will give the hiring team a clear view of your capabilities.
Highlight Your Testing Mindset: Since a strong testing mindset is crucial for this role, make sure to mention your experience with QUnit or similar test runners. Provide examples of how you've implemented comprehensive test plans in past projects.
How to prepare for a job interview at Halian
✨Showcase Your Ember.js Expertise
Make sure to highlight your deep experience with upgrading and maintaining Ember.js applications. Be prepared to discuss specific projects where you've successfully upgraded versions, particularly from 3.x to 5.x or 6.x, as this is a key requirement for the role.
✨Demonstrate Your Node.js Knowledge
Since the role involves upgrading Node.js to v20+, it's crucial to showcase your understanding of Node.js environments and version migrations. Prepare examples of how you've handled similar upgrades in the past, focusing on any challenges you faced and how you overcame them.
✨Familiarity with Monorepo Structures
The company is looking for someone experienced with monorepo structures, including Lerna and Yarn Workspaces. Be ready to discuss your experience with these tools and how you've managed dependencies and package migrations in a monorepo setup.
✨Communicate Clearly and Effectively
As a good communicator, you'll need to demonstrate your ability to work autonomously while keeping stakeholders updated. Practice explaining complex technical concepts in simple terms, as this will be essential during the interview to show that you can bridge the gap between technical and non-technical team members.
