Principal Software Engineer in London

The AI company that's revolutionizing Hollywood. 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.

The Role: 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:

• Product Delivery & Technical Leadership: 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.