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For Companies At a Glance
- Tasks: Build innovative software solutions for eCommerce, focusing on delivery options and customer experience.
- Company: Join Flare, the leading delivery date platform for Shopify Plus brands.
- Benefits: Enjoy 25 days holiday, competitive salary, and a fast-paced work environment.
- Why this job: Be part of a dynamic team shaping the future of eCommerce with cutting-edge technology.
- Qualifications: 3+ years full-stack experience and familiarity with Shopify APIs required.
- Other info: Fast growth opportunities and a chance to work directly with founders.
The predicted salary is between 60000 - 80000 £ per year.
About Flare
Flare is the number one delivery date platform for Shopify Plus brands globally. We power the delivery experience at checkout for over 700 merchants, handling the logic, rules, and complexity behind the scenes so shoppers always see accurate, reliable delivery options when it matters most.
We’ve grown 10x in revenue since Q1 2025, processing over $100M in orders annually across hundreds of thousands of checkouts every month. We’re growing at 15% month-on-month, cash-flow positive, and just getting started.
We’re building Flare into the end-to-end shipping logic layer for Shopify, from checkout UI to carrier integrations. Legacy and unreliable software owns this space today. We’re taking it from them.
Why this role exists
Flare was built by two founders. You’d be the third person in the company and the first engineering hire to join the founding team. The work is hard: real-time delivery calculation, geo and postcode rule enforcement, carrier and fulfilment integrations, checkout performance at scale. We need someone who loves building reliable systems fast and is happy to roll up their sleeves and get stuck in, whether that’s shipping a customer-facing fix that drives retention or architecting something that scales to ten times the load.
We move fast and the bar is high. You’ll work directly with our CTO, who built a rules and conditions engine from scratch that processes over a million requests a week, returning complex delivery decisions to Shopify in under 190ms. You’ll learn how those decisions got made, how to build for scale whilst shipping fast, and how to take something from zero to one. Our CEO grew Flare from nothing to 700 brands without a sales team, so when you’re building, you’re building on top of real commercial momentum.
You’ll own how you build, ship things live for major brands within your first weeks, and be pushed to do the best work of your career. If you’re the kind of engineer who finds that energising, this is the right place.
We’re an AI-first team. Using tools like Cursor and Claude Code isn’t optional - it’s how we move fast without cutting corners. Anything that helps us ship better product faster is fair game.
What you’ll work on
- The decision engine: At the core of Flare is a system that takes everything - postcode, product, carrier, cut-off time, cart, customer location - and distils it into a simple, accurate response that shows the right delivery options to the right shopper at the right moment. You’ll expand the rules and conditions layer, add new carrier and fulfilment integrations, and push the performance envelope as request volume grows.
- Checkout and customer experience: The Shopify checkout is one of the most constrained and scrutinised environments in eCommerce. You’ll build the frontend layer that takes the output of our decision engine and turns it into a fast, polished experience that shoppers actually enjoy using.
- AI-assisted onboarding: Onboarding is a critical and genuinely interesting problem. You’ll work on using AI to make setup as frictionless as possible, including building agents that can complete configuration autonomously.
- Scale and reliability: We’re building toward $1bn in orders processed. You’ll be a core part of figuring that out. Every architectural decision comes back to one question: is this fast and reliable enough?
The kind of person we’re looking for
We want someone who is deeply curious about the problems our merchants face, happy to get stuck into the work that makes customers fall in love with the product, and capable of thinking bigger when it matters. You care about the customer, you understand eCommerce, and you bring your own thinking to the table.
That means:
- At least 3 years of strong full-stack experience, comfortable moving between frontend product work and backend systems.
- Real experience with Shopify APIs, eCommerce, logistics, or complex rule-based backend systems.
- You think carefully about performance and know what it means to build a system that has to respond in milliseconds.
- You write with production in mind: failure cases, edge cases, what happens when something breaks at 3am for a merchant processing thousands of orders a day.
- You ship fast without being reckless, and you know the difference between moving quickly and cutting corners.
- You use AI tooling as a natural part of how you work.
The stack
TypeScript, React (Preact), Remix, Node.js, GraphQL, AWS (ECS/EC2, DynamoDB), Shopify APIs and Webhooks.
The hiring process
- Intro call (30 mins) with the CTO about your background and the role.
- Technical deep dive (60 mins) on a real system design problem relevant to Flare.
- Founder conversation (30 mins) with the CEO about how you work and what you’re looking for.
- Offer
What we offer
25 days holiday plus your local public holidays. We start with a one month trial, followed by a six month contract, with a move to a permanent position for the right person. We move quickly for the right person.
How to apply
Email with the following:
- An overview of what you’ve built and shipped: production apps, side projects, systems you owned or played a significant part in.
- Your GitHub profile, portfolio, or any links to live work.
- A short note on why this role resonates with you.
Software Engineer (Full-Stack) (Shopify) in Belfast employer: Flare - Scheduled Delivery
Contact Detail:
Flare - Scheduled Delivery Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Software Engineer (Full-Stack) (Shopify) in Belfast
✨Tip Number 1
Get your networking game on! Reach out to people in the industry, especially those connected to Flare or Shopify. A friendly chat can open doors and give you insights that a job description just can't.
✨Tip Number 2
Show off your skills! If you've built something cool, whether it's a side project or a production app, make sure to have it ready to share. We love seeing what you've done and how you think about problems.
✨Tip Number 3
Prepare for the technical deep dive! Brush up on your system design skills and be ready to discuss how you'd tackle real-world problems. We want to see your thought process and how you approach challenges.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you're serious about joining our team at Flare.
We think you need these skills to ace Software Engineer (Full-Stack) (Shopify) in Belfast
Some tips for your application 🫡
Show Us What You've Built: When you apply, make sure to give us a solid overview of your past projects. We want to know what you've built and shipped, so be specific about your contributions and the scale of what you handled. This is your chance to shine!
Keep It Relevant: In your application, focus on what resonates with us about the role. Skip the formal cover letter and just tell us why you're excited about what we're building at Flare and how your background fits into that picture.
Share Your Code (or Talk Us Through It): If you can’t share code, no worries! Just walk us through your thought process and decisions on past projects. We love to hear about your problem-solving skills and how you approach challenges.
Apply Through Our Website: We encourage you to apply directly through our website. It makes things easier for both of us and ensures your application gets to the right place quickly. Let's get started on this journey together!
How to prepare for a job interview at Flare - Scheduled Delivery
✨Know Your Tech Stack
Make sure you’re well-versed in TypeScript, React, Node.js, and GraphQL. Brush up on your knowledge of AWS services like ECS/EC2 and DynamoDB, as well as Shopify APIs. Being able to discuss how you've used these technologies in past projects will show that you're ready to hit the ground running.
✨Understand the Business
Flare is all about enhancing the delivery experience for Shopify Plus brands. Familiarise yourself with eCommerce logistics and the challenges merchants face. This will help you demonstrate your curiosity and understanding of the domain during the interview, which is crucial for this role.
✨Prepare for Technical Deep Dives
Expect a technical deep dive where you'll tackle real system design problems. Practice explaining your thought process clearly and concisely. Think about performance, scalability, and reliability in your solutions, as these are key aspects of the role.
✨Showcase Your Problem-Solving Skills
Be ready to discuss specific examples of how you've tackled complex issues in your previous work. Highlight instances where you’ve built reliable systems under pressure or improved performance. This will illustrate your ability to think critically and act decisively, which is exactly what Flare needs.