At a Glance
- Tasks: Design and build innovative web apps using React and TypeScript for complex data interactions.
- Company: Join HASH, a fast-growing deep-tech company revolutionising information integration.
- Benefits: Competitive salary, equity options, 30+ days holiday, and global team retreats.
- Other info: Opportunity for significant career growth and to work on groundbreaking projects.
- Why this job: Shape the future of AI interfaces and collaborate with top experts in a dynamic environment.
- Qualifications: Expertise in React, TypeScript, and a passion for creating user-friendly web applications.
The predicted salary is between 70000 - 120000 £ per year.
About HASH
HASH's open-source platform helps firms integrate both structured and unstructured information into knowledge graphs that support simulating, optimizing and automating processes. Our mission is to solve information failure, and help everybody make the right decisions. To that end, we're unapologetically excited. Actions speak louder than words, and we measure performance by output. We prioritize speed, and measure product delivery timelines in hours and days, not months and years. We value high-energy, high-expectations people who do what they say and say what they mean. We're committed to building a high-commitment, high-trust environment, and believe that the best teams are most productive together, in-person. We're therefore currently hiring exclusively in both London (UK) and Berlin (Germany) to join the firm.
About the role
We’re a fast-growing deep-tech company crafting web-based tools that help people model, understand, and optimize real-world systems and processes using AI. From interactive process-model editors to real-time simulations, we turn complex, non-textual data into intuitive, responsive, accessible web apps designed to be used by non-technical domain experts at research labs, startups and enterprises worldwide. As a senior Frontend Engineer you’ll own end-to-end delivery of novel world modeling and AI native interface components, helping shape our frontend architecture, as part of an Advanced Research + Invention Agency funded project building systems for delivering “Safeguarded AI”. You’ll collaborate with technical product management, UX researchers and AI engineers from top labs, as well as our own developers and leadership, to push the boundaries of what a browser can do — whether that’s a drag-and-drop model builder, timeline-based simulator, or multimodal feedback interface.
What you'll work on
- Design, build, and ship production-ready React/TypeScript components and app-wide features for complex data-driven UIs
- Work with mathematical experts to convert world-modeling theory formalizations into software requirements, and writing tests which ensure implementation correctness
- Convert novel UX/UI designs— for new world modeling and AI-interaction features — into performant, responsive and accessible experiences that work across devices
- Establish project-wide standards for code quality (e.g. via linting), review and testing, and provide feedback on the work of other frontend engineers
- Profile and optimize rendering performance for complex interactions and visualisations
- Tell the story of best practices and lessons learned in developing and testing novel, complex world-modeling interfaces, e.g. via blog posts and workshops
- Partner with backend/infra teams to identify and manage interdependencies, and to help define robust APIs that support excellent, feature-rich frontend performance
- Stay on top of emerging browser capabilities and drive adoption of the ones that matter
Must have
- Expertise with React, TypeScript, modern HTML & CSS
- Proven track record architecting and delivering rich web apps that involve complex user interactions
- Rigorous approach to documenting and versioning components for external audiences
- Experience profiling and debugging performance in devtools
- Comfortable taking a visible technical leadership role, mediating discussions around standards and implementation approaches, and taking accountability for the delivery of features on time and to spec
- Excellent written & verbal communication in English and comfort working async
Nice to have
- Familiarity with process/model-oriented UIs: BPMN, UML, systems-dynamics models, graphs, etc.
- Understanding of WCAG 2.2 and pragmatic accessibility techniques (ARIA, focus management, keyboard UX)
- Public record of maintaining a well-documented, semantically versioned library (ideally in an open-source context)
- Experience with CRDTs or other real-time collaboration solutions
- Hands-on experience with WebAssembly pipelines
- Canvas/WebGL experience for high-performance rendering
Benefits
We offer leading equity-weighted total compensation, including competitive salaries and tax-advantaged options. We also offer: Employer pension contributions, At least 30 days holiday annually, Quarterly in-person team retreats around the world. This role pays £70,000-£120,000 base/bonus + meaningful equity.
Frontend Engineer London · (opens in a new tab) employer: HASH
HASH is an exceptional employer that fosters a dynamic and innovative work culture, where employees are empowered to take ownership of their roles and contribute directly to the company's strategic direction. With a strong focus on personal and professional growth, HASH offers competitive compensation packages, including performance-based bonuses and equity, alongside opportunities to tackle complex challenges in a collaborative environment. Located in vibrant cities like London and Berlin, employees benefit from a stimulating atmosphere that encourages creativity and forward-thinking.
StudySmarter Expert Advice🤫
We think this is how you could land Frontend Engineer London · (opens in a new tab)
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at HASH or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to HASH.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like HASH.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like HASH that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Frontend Engineer London · (opens in a new tab)
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at HASH.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at HASH and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at HASH
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If HASH uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
