Senior Payments Developer

The Role

Our work is driven by helping viagogo become the world's largest ticket marketplace, and to do that in truly global company - 24/7 uptime required. Customers are using different payment types all around the world - 41 payment types and 98 currencies (with more being added). We develop and support internal/external API integrations for our customers, internal services & tools accept and disburse payments, as well as fraud and compliance checks. For a global ecommerce company that both accepts and disburses payments, scaling these processes to capture all markets while not putting our existing infrastructure at risk, is one of the most critical activities for our engineering team.

As a senior developer, you'll be expected to work in every stage – from understanding the new business challenges to implementing and maintaining new third-party (or internal) APIs. Some sample projects that you might work on in the next few months include:

  • Develop efficient, performant ecosystems of APIs, services and processes to do payments, fraud checks on payments, listings, or customers created/updated everyday
  • Develop new UI tools for internal fraud/compliance checks
  • Adding new payment methods for buyers and sellers
  • Changing the decision tree models on fraud detection and payment systems to ML
  • Automate anything repetitive in our processes

The Tech

viagogo predominantly utilizes Microsoft technologies, such as Windows, .NET, C# and IIS, however we’re not afraid to use the right tool for the job. We use RabbitMQ for some of our internal pub/sub messaging, Redis for local caching and gRPC for high performance out of process calls.

Our public facing website is built using ASP.NET MVC 5.2 and is deployed to multiple Windows Servers that are fronted by an F5 load balancer. We have heavily customized MVC to suit our requirements and handles roughly 250 HTTP requests per second per server when mostly idle.

Payments and fraud team has three main services: integrations, payment & fraud checks with 3rd parties, and internal fraud checks for buyer and seller data. We operate on a global scale with our services being called 750k times on average every day.

We also have WebAPIs that are  consumed by 3rd parties to give fraud check results, payment updates, customer updates, or TC40 information about payments.

Our backend is a set of SQL Server databases deployed in a high-availability configuration using availability groups.  These databases support everything from high-volume transactions to decision support/telemetry analytics.

We're increasingly taking advantage of the Azure cloud to enable hybrid or cloud-only scenarios that support our global growth and ability to quickly respond to surges in demand.

About You

Success in this role requires passion for technology and for using tech to solve business challenges.  We expect that you've already demonstrated your ability to solve difficult problems multiple times already, and that you have consistently been drawn to larger projects with increasing amounts of risk/load/complexity (or similar dimensions). 

We would like to see team members who are creative with excellent problem solving, scalability skills while maintaining a good sense of process control and automation.

Creativity / Problem Solving: the ability to find creative, quick and robust solutions to difficult problems or new third party integrations

Scalability: the ability to develop and deploy efficient changes that will remain performant under traffic

Process Control and Automation: We should always find a way to automate anything repetitive in the payments and fraud eco system.

You'll also likely be a specialist in one or more areas. Working alongside individuals who have extreme depth in areas like WebAPI, SQL Server performance, performant C# code, etc, we'll expect you to bring an additional dimension to our team that you can leverage not only by building exceptional solutions, but also by sharing your knowledge to build a better engineering team.

Apply for this Job

* Required


U.S. Equal Opportunity Employment Information (Completion is voluntary)

Individuals seeking employment at viagogo are considered without regards to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, or sexual orientation. You are being given the opportunity to provide the following information in order to help us comply with federal and state Equal Employment Opportunity/Affirmative Action record keeping, reporting, and other legal requirements.

Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Form CC-305

OMB Control Number 1250-0005

Expires 05/31/2023

Voluntary Self-Identification of Disability

Why are you being asked to complete this form?

We are a federal contractor or subcontractor required by law to provide equal employment opportunity to qualified people with disabilities. We are also required to measure our progress toward having at least 7% of our workforce be individuals with disabilities. To do this, we must ask applicants and employees if they have a disability or have ever had a disability. Because a person may become disabled at any time, we ask all of our employees to update their information at least every five years.

Identifying yourself as an individual with a disability is voluntary, and we hope that you will choose to do so. Your answer will be maintained confidentially and not be seen by selecting officials or anyone else involved in making personnel decisions. Completing the form will not negatively impact you in any way, regardless of whether you have self-identified in the past. For more information about this form or the equal employment obligations of federal contractors under Section 503 of the Rehabilitation Act, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at

How do you know if you have a disability?

You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Disabilities include, but are not limited to:

  • Autism
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, or HIV/AIDS
  • Blind or low vision
  • Cancer
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or hard of hearing
  • Depression or anxiety
  • Diabetes
  • Epilepsy
  • Gastrointestinal disorders, for example, Crohn's Disease, or irritable bowel syndrome
  • Intellectual disability
  • Missing limbs or partially missing limbs
  • Nervous system condition for example, migraine headaches, Parkinson’s disease, or Multiple sclerosis (MS)
  • Psychiatric condition, for example, bipolar disorder, schizophrenia, PTSD, or major depression

1Section 503 of the Rehabilitation Act of 1973, as amended. For more information about this form or the equal employment obligations of Federal contractors, visit the U.S. Department of Labor's Office of Federal Contract Compliance Programs (OFCCP) website at

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.