At a Glance
- Tasks: Build innovative React applications for AI-driven video analysis and enhance user experience.
- Company: Join HALOS, a cutting-edge scaleup focused on safety and innovation in security technology.
- Benefits: Enjoy generous leave, competitive salary, health insurance, and learning opportunities.
- Other info: Diverse and inclusive workplace with excellent career growth potential.
- Why this job: Make a real impact with your skills in a collaborative and creative environment.
- Qualifications: 5+ years in TypeScript/JavaScript, expert in React, and experience with modern build tools.
The predicted salary is between 60000 - 80000 € per year.
HALOS is an advanced body camera and cloud software scaleup, working with some of the biggest names in security, services, and law enforcement. At HALO, we're passionate about safety and innovation, constantly staying ahead of threats and reducing risk. What sets HALOS apart is not just the cutting‑edge technology we develop but the culture we've nurtured. Our team embodies openness, transparency, and a "one team" spirit. We're a group of passionate individuals, all working on exciting and impactful projects. Here, you'll find an environment that fosters collaboration, creativity, and a shared sense of purpose.
What You’ll Work On
We’re building the next generation of AI‑driven video forensic and evidence analysis tooling for our body‑worn camera platform. As a Senior Frontend Engineer, you’ll help shape the user experience behind complex investigative workflows including video review, transcription, timeline analysis, streaming, and AI‑assisted insights. This is a hands‑on engineering role focused on building fast, reliable, and intuitive interfaces for large‑scale media and data‑heavy applications. You’ll work closely with backend engineers, product, and design to deliver modern React applications that balance performance, usability, and maintainability across mission‑critical workflows.
Day to Day
- Build React applications using TypeScript, Tanstack Router/Query, and Shadcn UI
- Design type‑safe APIs with tRPC spanning frontend and backend
- Develop AWS Lambda functions and manage infrastructure with AWS CDK
- Work across React (Vite) and Next.js monorepos using Turbo and pnpm
- Write tests with Vitest and Playwright
- Optimize performance (bundle sizes, Core Web Vitals, query caching)
- Review code, maintain strict TypeScript standards, and ensure security best practices with Zod validation
Your Qualifications
You're a pragmatic engineer who values simplicity and type safety. You've shipped production apps at scale and understand trade‑offs between abstraction and clarity. You're experienced in taking features from requirements through implementation to production.
Required
- 5+ years professional TypeScript/JavaScript development
- Expert React with modern patterns in SPA applications
- Modern build tools (Vite, Turbo, webpack) and monorepo management
Helpful
- tRPC, Tanstack ecosystem (Query, Router, Table), & Next.js
- AWS CDK
- Tailwind CSS, Shadcn/Radix components
- Zod validation, Playwright E2E testing
- Performance optimization and Web Vitals experience
- React Native
Benefits
- Generous Annual Leave Allowance
- Competitive salary and commission/bonus package
- Employer matched pension scheme
- Learning and Development opportunities
- Private Health Insurance
- Cycle to work scheme & Home & Tech scheme through salary sacrifice
- Regular company events and social initiatives
Diversity & Inclusion
We’re an Equal Opportunity Employer and embrace a diversity of backgrounds, cultures, and perspectives. We do not discriminate on the basis of race, colour, gender, sexual orientation, gender identity or expression, religion, disability, national origin, protected veteran status, age, or any other status protected by applicable national, federal, state, or local law.
Senior Frontend Engineer in Belfast employer: HALOS Body Cameras
At HALOS, we pride ourselves on being an exceptional employer, offering a vibrant work culture that champions collaboration and innovation. Our commitment to employee growth is evident through generous learning opportunities and a supportive environment that values diversity and inclusion. Located in a dynamic sector, our team enjoys competitive benefits, including a robust annual leave allowance and health insurance, making HALOS a truly rewarding place to advance your career as a Senior Frontend Engineer.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Frontend Engineer in Belfast
✨Tip Number 1
Network like a pro! Reach out to current or former employees at HALOS on LinkedIn. A friendly chat can give you insider info and might even lead to a referral, which is always a bonus!
✨Tip Number 2
Show off your skills! If you have a portfolio or GitHub with projects that highlight your React and TypeScript expertise, make sure to share it during interviews. It’s a great way to demonstrate your hands-on experience.
✨Tip Number 3
Prepare for technical challenges! Brush up on your coding skills and be ready to tackle some live coding exercises. Practising common algorithms and React patterns will help you feel more confident.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining the HALOS team!
We think you need these skills to ace Senior Frontend Engineer in Belfast
Some tips for your application 🫡
Show Your Passion:When writing your application, let your enthusiasm for safety and innovation shine through. We love seeing candidates who are genuinely excited about the work we do at HALOS, so don’t hold back!
Tailor Your Experience:Make sure to highlight your experience with TypeScript, React, and any relevant tools like AWS CDK or Playwright. We want to see how your skills align with our needs, so be specific about your past projects and achievements.
Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon and focus on what makes you a great fit for the Senior Frontend Engineer role. Remember, less is often more!
Apply Through Our Website:We encourage you to submit your application directly through our website. It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it’s super easy!
How to prepare for a job interview at HALOS Body Cameras
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially TypeScript, React, and AWS. Brush up on your knowledge of modern build tools like Vite and Turbo, as well as performance optimisation techniques. Being able to discuss these confidently will show that you’re ready to hit the ground running.
✨Showcase Your Projects
Prepare to talk about specific projects you've worked on that align with HALOS's focus on user experience and complex workflows. Highlight your role in building scalable applications and any challenges you overcame. This not only demonstrates your technical skills but also your problem-solving abilities.
✨Emphasise Collaboration
HALOS values a 'one team' spirit, so be ready to discuss how you’ve collaborated with backend engineers, product teams, and designers in the past. Share examples of how you’ve contributed to a positive team culture and how you handle feedback and code reviews.
✨Ask Insightful Questions
Prepare thoughtful questions about HALOS’s projects, team dynamics, and future goals. This shows your genuine interest in the company and helps you assess if it’s the right fit for you. Consider asking about their approach to innovation and how they foster collaboration within the team.
