Cookie Preferences

By clicking “Accept”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. View our Privacy Policy for more information.

Close icon
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Backend Tech Lead

Location icon
London, United Kingdom (Remote)
Clock icon
Full time


Unitary’s purpose is to make the internet safer to improve lives and create a fairer world. Our mission is to develop video understanding AI and deploy it at scale to solve real-world problems in content moderation and beyond. We believe in an online world free from harm, where we can trust AI to make safe and fair decisions.

We are a remote-first team of passionately curious individuals who want to improve our online world by understanding its content using AI. We value our different backgrounds and experiences and recognise that a more diverse team is a stronger team. While we acknowledge that we have an essential mission and serious challenges to solve, we approach them with interest, playfulness and determination. If this sounds like something you’d like to be a part of, then reach out to us!

Are you an experienced Backend Tech Lead with a passion for AI? Do you want to lead a team of talented engineers developing cutting-edge machine learning technology? If so, we want to hear from you! As part of this role, you will be accountable for creating the technical vision and guiding the approach and execution of technical problems. Tech leads need to be able to balance hands-on coding with coordinating the team and guiding development. They work closely with the Product Manager and Engineering manager of their team and should be adept at mentoring engineers.

As part of this role, you will:

  • Set the technical direction and strategy of the Backend Team
  • Cultivate the design of performant systems that scale and meet customer needs, encouraging and supporting your team to build software that is high quality and tested sufficiently
  • Work closely with the Machine Learning and Platform teams to build scalable and efficient solutions
  • Guide and mentor a team of backend developers, providing guidance and support alongside their Engineering Manager to ensure high-quality delivery
  • Carry the team’s context and maintain the essential cross-team and cross-functional relationships
  • Balance your time between hands-on development, architecture knowledge, and production support
  • Be a close partner to the team’s Product Manager and Engineering Manager
  • Stay up-to-date with the latest technologies and best practices in backend development
  • Work closely with the Engineering Manager to hire appropriately for the team


We would love to hear from you if (you have):

  • Bachelor's or Master's degree in Computer Science or a related field
  • 5+ years of experience in backend development, with a strong focus on architecture and design
  • 1+ years of experience leading and managing development teams as a Tech Lead
  • Strong understanding of software design patterns, algorithms, and data structures
  • Strong understanding of Queue-based asynchronous systems at scale
  • You have excellent communication and organisational skills
  • You value emotional intelligence and are a calming and positive presence
  • You enjoy working with a remote; international team spread across different countries and time zones

It would be even better, but not essential, if you have:

  • Experience with Machine Learning or AI projects
  • Experience with cloud computing platforms such as AWS or GCP
  • Experience with microservices architectures and containerisation technologies such as Docker, Kubernetes
  • Experience with large-scale processing
  • Experience with continuous integration and delivery (CI/CD) practices
  • Experience with Go


Unitary is a remote-first company that believes happy people are a must for company success. We are committed to creating a great culture built on genuine interest for each other's wellbeing and shared positive experiences.

We are fiercely passionate about making the internet a safer place, and deeply motivated to become a force for good. We believe that as individuals we are awesome, but as a team, we are unbeatable.

We offer progressive and market leading benefits, which we hope will enable everyone to create well balanced and exciting lives both on and off work. To name a few of them:

  • Flexible hours and location
  • Flexible public Holidays (choose to take public holidays on the days they fall, or take them at a different time of the year when it fits your values, beliefs, and calendar better)
  • Share options
  • Occupational pension
  • Paid parental leave (3 months of fully paid for everyone regardless of gender, location or family situation)
  • Paid sick leave (2 weeks fully paid)
  • Brain-Love Budget (£1,000 per person per year towards professional development and growth)
  • Feel-Good Budget (£500 per person per year towards anything health and wellness related)

Location: Fully Remote / London

Salary: £85k-£110k + Options

Apply for this job

We're looking forward to receiving your application!

Apply now
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.