Senior Level Application Security Engineer, Synthesia
+ Stock options and bonus
AI video creation platform
Job no longer available
AI video creation platform
201-500 employees
Job no longer available
+ Stock options and bonus
201-500 employees
Company mission
To empower everyone to make video content - without cameras, microphones or studios.
Role
Who you are
- If you’re passionate about ethical use of AI, have experience in driving organizational wide application or product security programs, can dive deep technically with engineers and researchers and can communicate product risk tradeoffs clearly and with empathy, this is for you
- You have 5+ years of application security experience including design level guidance/threat modeling, code review and application security testing
- You have been part of the AppSec team for a fast-growing company and owned driving and scaling the program
- You have prior experience in understanding the unique security challenges posed by SaaS products
- You can read, and if required even write, production code in Python and Typescript, make iterative improvements, and identify and fix security vulnerabilities
- You have a track record of implementing automation in a security context
- You have built strong positive relationships with internal customer engineering teams as an application or product security engineer
- You have worked with product managers and engineers on balancing risks with product priorities such as velocity and user friction
- You have prior experience in understanding cloud security considerations for product engineering teams, particularly within AWS
What the job involves
- As a Senior level Application Security Engineer, you will join a small team of security engineers supporting the Product Engineering and Research and Development (RnD) department
- You’ll work closely with product managers, engineers and researchers to help shape and ship secure by default product features
- Driven and impact-focused, you will take the initiative to communicate effectively with product managers and teams, ensuring alignment and addressing potential issues promptly
- As a member of a small team, you’ll also help set the strategy and direction for scaling the company wide application security program
- This is an opportunity to help actually influence how generative AI products are designed and built with security, ethics and AI safety at the forefront
- Building and maintaining partnerships with specific product engineering teams, as a reasonable, friendly and effective security advocate
- Leading threat modeling of top engineering priorities with security impact, supporting engineers in reviewing pull requests, weighing in on security impacting implementations, and answering ad-hoc application security questions
- Building guidance and implementing secure by default patterns/paved roads
- Contributing to improving and scaling our secure software development program
- Co-ordinating penetration testing and bug bounty programs
- Participating in product security incident response
- Supporting our Corporate Security team who oversees general Security Operations on any area overlapping with application security
Our take
Video is an integral part of companies’ marketing strategies, and the adoption of synthetic media has grown in popularity. As organisations are investing in videos, startups are building platforms to support the process. Synthesia is an AI-powered video generation platform that saves enterprises up to 100x the cost and time of producing a video.
The company leverages deep learning to simulate real videos and real actors without the need for costly infrastructure like camera crews, actors, cameras, studios, and a lengthy post-production process. Synthesia’s first product STUDIO launched in public beta in the summer of 2020 and it is now used by 30,000+ companies, including the BBC, Teleperformance, Amazon, and Reuters.
Notably, Prof. Matthias Niessner, one of the co-founders of the company, is behind some of the most well-recognised research projects in the field Deep Video Portraits and Face2Face. The company's intuitive interface has grown to become the #1 rated video creation platform, proving its strong ability to capitalise on the growing AI in media market – which is estimated to be worth $99.48 Billion by 2030.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (last 2 of 8 rounds)
Jan 2026
$200m
SERIES E
Apr 2025
$13.2m
LATE VC
Total funding: $550m
Company benefits
- đź“ŤYou will work in a hybrid setting with offices London, New York, Copenhagen, Amsterdam, Munich & Zurich!
- đź’¸ Stock options in our fast-growing Series C start-up
- 🌴 25 days of annual leave + public holidays in the country where you are based
- 🎉 Fun culture with regular socials and company retreats (Portugal, Copenhagen & Barcelona!)
- 🍫 Office snacks and regular tasty lunches!
- 🤑 Generous referral scheme
- 🚀 A huge opportunity for career growth as you’ll help shape a market-defining product
- 🏥 Private Medical Insurance (Medical History Disregarded basis) including mental health support, dental & vision, cashback and gym discounts.
- 🍼 Paid parental leave entitling primary caregivers to 16 weeks of full pay, and secondary 5 weeks of full pay.
- 🧓 Pension contribution/salary sacrifice 🇬🇧
- 🚲 Cycle to work scheme (London) 🇬🇧
Company HQ
Fitzrovia, London, UK
Leadership
Victor Riparbelli
(Co-Founder & CEO)Experience working on growth and product at Aller Media and Founders. Co-founded Immersive Futures in 2016 and Coincall in 2017.
Steffen Tjerrild
(Co-Founder & COO)Former Investment Manager at Kukula Capital and Business Developer at Founders.
Matthias Niessner
(Co-Founder)Computer science professor at the Technical University Munich.
Lourdes Agapito
(Co-Founder)Professor of 3D Computer Vision at University College London.
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