Senior Fullstack Engineer

Published on February 19, 2024

Onfido makes digital identity simple. We’ve spent 10 years developing identity verification solutions that empower people to quickly and securely access the services they love. Our AI-powered solutions are built with fairness and inclusiveness at their core, and have been awarded ‘Outstanding Leader in Accessibility’ and ‘Best Innovation in Algorithmic Bias Mitigation’ from CogX. Discover how an automated identity verification solution can help your business’ bottom line by converting more customers, reducing the need for manual review, and preventing fraud risk in our ROI calculator.

Onfido lets people prove their identity anytime, anywhere. We’re creating a more open digital world by connecting them to the services they love and need simply, speedily and safely – whether they’re renting a car or opening a bank account. We’re building a full-service suite of AI-powered identity verification solutions with fairness and inclusiveness at their core, and were awarded ‘Outstanding Leader in Accessibility’ and ‘Best Innovation in Algorithmic Bias Mitigation’ and ‘Best AI product in FinTech’ awards at CogX

We are a global, established, technology company having surpassed $130M in annual recurring revenue (ARR) with a prominent position in the global marketplace, and have been repeatedly recognized for our performance and innovation. In 2023, we’ve been awarded ‘Best Fraud Detection and Prevention Company of the Year by Frost & Sullivan, featured as a Strong Performer by Forrester in its 2022 Identity Verification Wave, and named to the CB Insights Fintech 250 for the fourth year running. We've received over $200 million in funding from investors such as TPG Growth, Microsoft, and Salesforce to achieve our vision. We partner with hundreds of businesses to help millions access services every week – from billion dollar institutions to hypergrowth unicorns. We support checks in 195 countries, and 2,500+ document types. With over 1,200 customers worldwide and 500 employees

Our goal is to work together to promote and celebrate an inclusive and diverse community. Collectively, all Onfidoers are committed to creating an environment where everyone can be themselves, and where differences are celebrated. We encourage people from all backgrounds and cultures to come together to solve some of the world's most interesting problems.

We are looking for a full-stack engineer who is passionate about solving interesting problems and genuinely enjoys the craft of programming. We don’t expect a master of all trades, but someone more experienced in backend or frontend who is flexible enough to hop to the other side if needed, and who is able to reason about complete end-to-end software architectures. A T-shaped, well-rounded, software engineer that doesn’t see themselves fitting into a small very well defined box.

We’re a closely knit team who tackle challenges together - expect a lot of pair programming and rich discussions in code reviews. We have a cultural strong bias for action, like to move fast, adjust, adapt, then reflect and seek ways to improve every day. Experience working in a Lean environment is desired, and we want help to drive the shipment of well tested software frequently. TDD and good testing practices are highly valued here. As a senior engineer you’ll get to mentor and guide the more junior team members while growing your own career with the support of mentors and coaches throughout the business.

Be open to learning new things, owning topics, experimenting with new ideas, technologies and pioneering new discoveries that nobody else has thought of yet. We would love to welcome a creative and enthusiastic problem solver to join us as we achieve big things!
Tech Stack
“I get it; you are flexible about technology skills, but what stack do you use?”

-Backend: mostly Python and Ruby
-Frontend: React and Typescript
-ML: Tensorflow, Jupyter, Dask
-Kubernetes and Docker for deployment
-AWS for underlying infrastructure (Aurora, Redis, Dynamo, S3, SNS, SQS, CloudFront, API Gateway, etc.)
-Gitlab for software lifecycle management.


We are technology agnostic at Onfido. We are not looking for you to have experience in all these technologies. As long as you're open to learn, please apply.


Who you are:

We encourage people from all backgrounds, cultures and skill levels to apply. It is okay to not meet all requirements listed as we are looking for individuals who are passionate, eager to learn.

Where you will be:

At Onfido, we have a distributed workforce. This role will be based as advertised on the job description.  We have a hybrid model, and you can choose to work fully remote, or come to our offices! We let all of our employees choose what’s best for them.

Onfido Culture: 

Onfidoers share a set of core values and want to hear from you if you believe in:
> Succeeding together; you work collaboratively and put the team first
> Taking pride; you care about quality, producing great work and customer / user outcomes
> Creating customer buzz; you demonstrate a strong user / customer focus
> Learning things & sharing them; you have a natural curiosity and default to sharing knowledge with others
> Finding a better way; you’re adept at finding solutions, experimentation and innovating to make things better

Benefits: 

We're committed to making Onfido a fantastic place to work, so we go to great lengths to give you what you need to succeed. You’ll receive:
> 25 days annual leave plus a day off for your Birthday.
> Two paid volunteering days per year.*
> Private Medical Insurance through Allianz*
> Life Assurance (3x Annual Base Salary)*
> Generous paid parental leave
> Free mental health coaching provided online.
> Life enrichment allowance of up to €95 per month for services including gym, yoga, fitness classes, massages, childcare, and therapy
> Dedicated learning opportunities including using tools like Learnably with availability  to use for learning resources such as books, coaches, conferences, courses, podcasts, and more
> Our open and transparent culture is reflected in our “Better Together” motto and we bring this to life by meeting once a week for our global weekly roundup (OnThursday); holding quarterly team socials, and other company-wide social events
> Expense up to £300 (or local equivalent) to purchase workstation setup equipment
> The opportunity to become a member of Onfido’s resource groups in order to learn different skills in our belonging groups

*after passing probation (3 months)

Check out Life at Onfido via our LinkedIn Careers Page

Onfido is committed to creating a diverse and inclusive work environment. We're always on the lookout for talented, passionate people and encourage applications from all backgrounds regardless of age, disability, gender, sexual orientation, parental status, race or religion. If you need reasonable accommodation at any point in the application or interview process, please let us know.