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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 the flexibility of a contract role 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- Identify and deprecate outdated libraries and plugins.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
Make sure to showcase your deep experience with Ember.js, especially in upgrading applications. Highlight any specific projects where you've successfully migrated from older versions to newer ones, as this will resonate well with the hiring team.
✨Tip Number 2
Familiarise yourself with the tools mentioned in the job description, such as Lerna and Yarn Workspaces. Being able to discuss your hands-on experience with these tools during an interview can set you apart from other candidates.
✨Tip Number 3
Prepare to demonstrate your testing mindset by discussing your experience with QUnit or similar test runners. Be ready to explain how you ensure comprehensive test coverage and the importance of this in the upgrade process.
✨Tip Number 4
Since communication is key for this role, think of examples where you've effectively communicated technical updates to stakeholders. This will show that you can work autonomously while keeping everyone informed.
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, as these are crucial for this role.
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 working with the specified technologies. This will give the hiring team a clear view of your capabilities.
Proofread Your Application: Before submitting, carefully proofread your application materials. Ensure there are no typos or grammatical errors, as attention to detail is key in engineering roles. A polished application reflects your professionalism.
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, 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 a 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 using tools like Lerna and Yarn Workspaces. Provide insights into how you've organised codebases and managed shared packages in previous roles.
✨Communicate Clearly and Effectively
As a good communicator, it's essential to demonstrate your ability to work autonomously while keeping stakeholders updated. Prepare to share examples of how you've communicated project progress and challenges in the past.