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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 a strong tech stack.
- Qualifications: 5 years of Ember.js experience and solid Node.js knowledge required.
- Other info: Opportunity to work with cutting-edge technologies and enhance your skills in a supportive environment.
- 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- Identify and deprecate outdated libraries and plugins.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 | Managed Services, Recruitment Agency & Contract Staffing
Contact Detail:
Halian | Managed Services, Recruitment Agency & Contract Staffing 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
Make sure to showcase your deep experience with Ember.js, especially in upgrading applications from older versions. Highlight any specific projects where you've successfully managed similar upgrades, as this will demonstrate your capability to handle the responsibilities of this role.
✨Tip Number 2
Familiarise yourself with the tools mentioned in the job description, such as Lerna and Yarn Workspaces. If you have experience using these tools, be ready to discuss how you've leveraged them in past projects to manage dependencies and streamline workflows.
✨Tip Number 3
Prepare to discuss your testing mindset and experiences with QUnit or similar test runners. Being able to articulate how you ensure comprehensive test coverage and validate releases will set you apart as a candidate who prioritises quality.
✨Tip Number 4
Since communication is key for this role, think of examples where you've effectively communicated with stakeholders or worked autonomously. Be ready to share how you keep teams updated on progress, especially during critical upgrade projects.
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 | Managed Services, Recruitment Agency & Contract Staffing
✨Showcase Your Ember.js Expertise
Make sure to highlight your deep experience with upgrading and maintaining Ember.js applications, especially the transition from version 3.x to 6.x. Be prepared to discuss specific challenges you've faced and how you overcame them.
✨Demonstrate Your Node.js Knowledge
Since the role requires solid grasp of Node.js environments, be ready to talk about your experience with version migrations, particularly to v20+. Share examples of how you've managed dependencies and resolved issues in past projects.
✨Familiarity with Monorepo Structures
Discuss your experience with monorepo structures, specifically Lerna and Yarn Workspaces. Prepare to explain how you've used these tools to manage shared packages and streamline development processes.
✨Communicate Clearly and Effectively
As a good communicator, it's essential to demonstrate your ability to work autonomously while keeping stakeholders updated. Practice articulating your thoughts clearly and concisely, especially when discussing technical concepts.