Principal Software Engineer
Principal Software Engineer

Principal Software Engineer

Full-Time 48000 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Lead the development of innovative AI tools for filmmakers and enhance creative storytelling.
  • Company: Join Flawless, a pioneering AI company transforming Hollywood with ethical technology.
  • Benefits: Enjoy a competitive salary, stock options, and a hybrid working environment.
  • Why this job: Shape the future of entertainment while collaborating with talented teams in a dynamic setting.
  • Qualifications: Deep expertise in software design and hands-on coding experience in TypeScript, React, or Python.
  • Other info: Flourish in a culture of trust, autonomy, and collaboration with excellent growth opportunities.

The predicted salary is between 48000 - 72000 £ per year.

Flawless is transforming Hollywood with assistive AI. Our tools empower filmmakers to edit, localize, and refine performances while preserving artistic intent. Designed to support, not replace, artists, our technology expands what is possible on screen and gives creators freedom to tell stories with greater impact and reach audiences in new ways. From enabling seamless multilingual releases to eliminating the need for costly reshoots, Flawless solves critical challenges that slow down productions and limit distribution. We are also setting the standard for ethical AI in entertainment. Our Artistic Rights Treasury (A.R.T.) is a rights management solution that protects artists and rights holders, ensuring that innovation moves forward with transparency and respect for creative ownership.

As a Principal Engineer in our Product Engineering team, you will be both the hands-on technical anchor for our DeepEditor product and a principal-level leader influencing work across the department. Day to day, you'll embed directly within the team - writing code, solving problems alongside other engineers, and unblocking delivery - while also guiding architecture, strategy, and technical standards for DeepEditor's long and short form offerings. You'll mentor senior engineers, shape key technical decisions, and ensure our products meet the highest standards of quality, performance, and innovation. Our core technologies are TypeScript, React, and Python. We're looking for a strong generalist that is happy to work across the stack to deliver robust, scalable solutions.

What We're Looking For

We're seeking a deeply technical, product-minded engineer who thrives in cross-functional environments and has a track record of delivering complex products at scale. You'll be as comfortable pair programming or debugging production issues as you are steering multi-team technical initiatives. You'll pair a hands-on coding approach with strategic leadership, ensuring our DE product evolves rapidly, robustly, and with a strong foundation for growth. The ideal candidate is both a technical problem solver and a culture builder, elevating engineering practices while enabling fast, high-quality delivery.

Responsibilities

  • Embed with teams to deliver high-quality product features and improvements day to day.
  • Lead the architecture and development of DeepEditor's long and short form offerings.
  • Drive technical decision-making that balances innovation with stability.
  • Mentor and coach senior engineers to raise overall technical standards.

Cross-Functional Collaboration

  • Partner with science, product, and creative teams to integrate new features and capabilities.
  • Translate product requirements into scalable technical solutions.
  • Champion best practices in code quality, testing, and deployment.

Product Optimization & Scalability

  • Improve systems to support rapid iteration of science modules.
  • Enhance performance, stability, and scalability across the DE stack.
  • Proactively identify and address risks to delivery and quality.

Qualifications & Experience

  • Deep expertise in software design, architecture and in testing and launching robust products.
  • Hands-on coding expertise in TypeScript, React, and/or an Object-oriented language such as Python, Ruby, Go, Java etc.
  • Product and delivery mindset.
  • Willingness to work embedded in teams daily.
  • Experience working in cross-functional teams.
  • Proven product ownership capability.
  • Individual contributor leadership experience with influence across multiple teams.

Interview Process:

At Flawless, our team and interview process want to help you show your best self. We'll dive into past projects and simulate working together. Our interview process is three rounds with some casual Zoom (or in-person) coffee in between to get to know each other:

  • Recruiting Screen: 30-45 minute call with our recruiting team.
  • Hiring Manager Screen: 45 minutes with our Director of Product Engineering.
  • Skills Interview: 60 minutes, for this role, this will be a live programming test with 1-2 of our current engineers.
  • Team Interview: 2.5-3 hours onsite Interview where you will meet a variety of your potential future colleagues.

Why work at Flawless?

You will be working in an environment based on trust, autonomy and collaboration, and this is a great opportunity for someone who wants to be part of a growing company in its most exciting stage of development. You can play a part in shaping the future of a company that’s caring, creative and collaborative. In addition to this, you’ll also receive:

  • Autonomy
  • A hybrid working environment
  • Competitive Salary
  • All permanent employees receive generous stock options

I don’t meet all the listed requirements—should I still apply?

Absolutely! Research shows that women and underrepresented groups often hesitate to apply unless they meet every qualification, but at Flawless, we actively work to break down those barriers. We believe diverse perspectives, experiences, and backgrounds make us stronger, and we are committed to supporting and elevating underrepresented talent. If you’re excited about the role, share our values, and believe you can contribute meaningfully, we encourage you to apply—even if you don’t meet every single requirement. Your unique skills and perspective matter, and we’d love to hear from you.

Principal Software Engineer employer: Flawless

Flawless is an exceptional employer that fosters a culture of trust, autonomy, and collaboration, making it an ideal place for a Principal Software Engineer to thrive. With a commitment to ethical AI in entertainment, employees are empowered to shape the future of filmmaking while enjoying competitive salaries, generous stock options, and opportunities for professional growth in a dynamic, hybrid working environment. Join us in revolutionising Hollywood and be part of a caring and creative team dedicated to innovation and artistic integrity.
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Contact Detail:

Flawless Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Principal Software Engineer

✨Tip Number 1

Get to know the company inside out! Research Flawless and its products, especially DeepEditor. This will help you tailor your conversations during interviews and show that you're genuinely interested in what they do.

✨Tip Number 2

Practice coding problems relevant to the tech stack they use, like TypeScript and Python. Use platforms like LeetCode or HackerRank to sharpen your skills, so you can ace that live programming test!

✨Tip Number 3

Don’t underestimate the power of networking! Connect with current employees on LinkedIn or attend industry events. A friendly chat can sometimes lead to a referral, which can give you a leg up in the hiring process.

✨Tip Number 4

Be ready to showcase your past projects and how you've tackled challenges. Prepare stories that highlight your problem-solving skills and teamwork, as these are key for the collaborative environment at Flawless.

We think you need these skills to ace Principal Software Engineer

TypeScript
React
Python
Software Design
Architecture
Testing
Product Delivery
Cross-Functional Collaboration
Technical Decision-Making
Mentoring
Problem-Solving Skills
Scalability
Performance Optimization
Agile Methodologies
Product Ownership

Some tips for your application 🫡

Show Your Passion: When writing your application, let your enthusiasm for the role and our mission shine through. We want to see how excited you are about transforming Hollywood with AI and how you can contribute to our vision.

Tailor Your Experience: Make sure to highlight your relevant experience in software design and architecture, especially with TypeScript, React, and Python. We love seeing how your past projects align with what we do at Flawless, so don’t hold back!

Be Authentic: Don’t be afraid to show your personality! We’re looking for someone who fits into our collaborative culture, so share a bit about yourself and what makes you unique. Authenticity goes a long way in helping us get to know you.

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 the role. Plus, it shows you’re serious about joining our team!

How to prepare for a job interview at Flawless

✨Know Your Tech Stack

Make sure you’re well-versed in TypeScript, React, and Python. Brush up on your coding skills and be ready to discuss how you've used these technologies in past projects. Being able to demonstrate your hands-on experience will show that you're not just a leader but also a capable engineer.

✨Showcase Your Problem-Solving Skills

During the skills interview, focus on your approach to problem-solving. Think aloud as you work through the live programming test. This will give the interviewers insight into your thought process and how you tackle challenges, which is crucial for a Principal Software Engineer.

✨Prepare for Cross-Functional Collaboration

Flawless values teamwork across different departments. Be ready to discuss examples of how you've successfully collaborated with product, science, or creative teams in the past. Highlight your ability to translate product requirements into technical solutions, as this will resonate well with the interviewers.

✨Ask Thoughtful Questions

Use the time in each interview to ask insightful questions about the team dynamics, company culture, and future projects. This shows your genuine interest in the role and helps you assess if Flawless is the right fit for you. Plus, it’s a great way to engage with your potential future colleagues!

Principal Software Engineer
Flawless

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