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 that values creativity and personal growth.
- Why this job: Make a real impact in a collaborative environment while working with advanced technologies.
- Qualifications: 5+ years in TypeScript/JavaScript, expert in React, and experience with modern build tools.
The predicted salary is between 70000 - 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.
Don’t meet every single requirement? At HALOs we are dedicated to building and promoting a fair and inclusive workplace where everyone can flourish, reach their full potential and truly belong. We recognize that diverse teams foster a more creative and productive environment. So, if you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for - for this role, or perhaps another.
Senior Frontend Engineer in Belfast employer: HALOS Body Cams
At HALOS, we pride ourselves on being an exceptional employer, offering a vibrant work culture that champions collaboration, creativity, and a shared commitment to safety and innovation. Our team enjoys generous benefits, including a competitive salary, extensive learning and development opportunities, and a supportive environment that values diversity and inclusion. As a Senior Frontend Engineer, you'll be at the forefront of developing cutting-edge technology while working alongside passionate individuals dedicated to making a meaningful impact in the security and law enforcement sectors.
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 folks in your industry, especially those at HALOS. A friendly chat can open doors that applications alone can't.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your best React projects. This gives you a chance to demonstrate your expertise beyond just words.
✨Tip Number 3
Prepare for the interview by understanding HALOS' mission and values. Be ready to discuss how your experience aligns with their focus on safety and innovation.
✨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 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 want to see how your passion aligns with our mission 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 or Vite. We’re looking for specific examples that demonstrate your skills and how they relate to the role.
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 position.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for this exciting opportunity at HALOS!
How to prepare for a job interview at HALOS Body Cams
✨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 Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous projects, particularly around building scalable applications. Use examples that highlight your ability to balance performance and usability, and how you’ve implemented features from requirements to production. This will demonstrate your pragmatic approach to engineering.
✨Emphasise Collaboration
HALOS values a 'one team' spirit, so be ready to talk about your experience working closely with backend engineers, product teams, and designers. Share examples of how you’ve fostered collaboration in past roles, as this aligns perfectly with their culture of openness and teamwork.
✨Ask Insightful Questions
Prepare thoughtful questions about HALOS’ projects, team dynamics, and future goals. This not only shows your genuine interest in the role but also gives you a chance to assess if the company culture aligns with your values. Asking about their approach to innovation and safety can spark a great conversation!
