At a Glance
- Tasks: Join a founding team to build and scale innovative software products.
- Company: Exciting YC-backed startup in London with serious market traction.
- Benefits: Competitive salary, equity, hybrid working, and direct impact on product direction.
- Other info: Perfect for builders who thrive in fast-paced, early-stage environments.
- Why this job: Be part of a dynamic team shaping the future of tech from day one.
- Qualifications: Strong experience in Python, TypeScript, and modern front-end frameworks.
The predicted salary is between 90000 - 120000 £ per year.
This founding team role offers £90 K–£120 K plus equity. I’m working with an exciting YC‑backed startup in London that’s just closed a multi‑million‑pound funding round and is looking for a Senior Software Engineer to join their founding engineering team. Despite being early‑stage, they’re already punching well above their weight – with paying customers onboarded and serious traction in their market. This is a rare opportunity to get in at the ground floor of something special.
Responsibilities
- Working directly alongside the founders to build and scale the product
- Taking real ownership over technical decisions and architecture
- Shaping the engineering culture and technical direction from day one
- Building features that directly impact paying customers
Tech Stack
- Python
- TypeScript
- React/Next.js
Benefits
- 3 days per week in their London office (hybrid working)
- Direct impact on product and company direction
- Work with world‑class founders backed by Y Combinator
Qualifications
- Strong commercial experience with Python and TypeScript
- Experience with React/Next.js or similar modern front‑end frameworks
- Someone who thrives in fast‑paced, early‑stage environments
- A builder who wants ownership, not just tickets to complete
If you’re a senior engineer looking to step into a founding team role at a startup with genuine momentum, let’s talk.
Location & Employment
- London, United Kingdom
- Full‑time, Mid‑Senior level
Senior Software Engineer employer: HartleyCo
As a leading Fleet-based IT managed service provider and consultancy, we pride ourselves on fostering a collaborative and innovative work culture that empowers our employees to thrive. With a strong focus on professional development, we offer numerous growth opportunities for our team members, alongside the chance to engage with diverse clients and cutting-edge technologies. Our hybrid working model ensures a balanced approach to work-life integration, making us an excellent employer for those seeking meaningful and rewarding careers in IT architecture.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Engineer
✨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 HartleyCo 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 HartleyCo.
✨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 HartleyCo.
✨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 HartleyCo 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 Senior Software Engineer
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 HartleyCo.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at HartleyCo 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 HartleyCo
✨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 HartleyCo 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.
