Creating Universal Possibilities


SEE the list of OPEN OPPORTUNITIES at Cardstream below

Creating universal possibilities.

“Our international payments revolution is fast and dynamic, embracing the world of digital payments. At Cardstream, we empower forward-thinking innovators to envision universal possibilities. We understand that our success depends on the enthusiasm of the colleagues who keep it moving. We welcome meeting exceptional individuals who are interested in joining our constantly expanding Open Payment Network.”

Adam Sharpe, Chief Executive Officer

Who are the people that make up Cardstream?

We are achievers; innovators; forward-thinkers.

We enjoy the solid foundations of a proven company, whilst maintaining the creativity and entrepreneurial spirit of our early years. We all share a common goal – to influence and disrupt the status quo of payments, to the benefit of the payments ecosystem as a whole.  Cardstream’s Open Payment Network steps far beyond cards to include all forms of payment.  By emboldening collaboration and flexibility, we make possibilities happen.

Join our revolution.

SEE the list of OPEN OPPORTUNITIES at Cardstream>

PHP Software Engineer


We’re looking for an enthusiastic, technology minded PHP Engineer to join our Development team. The role involves helping to develop innovative technologies at a pace in order to contribute to the company’s rapid growth.

As the technology continues to evolve, the Software Engineer will be responsible for assisting with delivering high-quality code as part of a team working in an energetic environment. The role is ideal for an experienced PHP Software Engineer looking to consolidate their existing knowledge and in time learn the new skills necessary to move to a more senior level.

Working largely on the development and maintenance of the back end of our industry-leading payment gateway, code will primarily be produced in a sandbox, but the role may include engaging with live rollouts. The majority of the work will be backend core PHP development, some front-end web development experience is also necessary as the role will require the construction of User Interfaces for reporting or system management.

The role will require the candidate to work closely with senior development team members, helping them to deliver projects on time and on budget. As a Software Engineer, the successful candidate will be proficient in using Object Orientated PHP to develop complex solutions and provide resolutions to difficult problems.

Given the nature of the industry, security and compliance is key and the ability to adhere to coding standards, project specifications and deadlines will be of paramount importance.


Key Duties and Responsibilities

  • Object orientated PHP experience
  • PHP unit testing experience
  • JavaScript and jQuery experience
  • MySQL and/or MariaDB experience
  • Version Control with Git
  • Strong web security experience
  • Ability to assist in the production of project specification documentation and design applications
  • Ability to work occasional overtime due to the nature of the business


  • Experience with using LAMP stack
  • An understanding of PCI:DSS
  • Experience in the development of mobile applications
  • An understanding of symmetric and asymmetric encryption and message signing
  • Experience in using APIs including REST and SOAP interfaces
  • Experience of task management with Jira
  • An understanding of API protocols; Encryption; Signing; SSL; PKI; and
  • Advanced HTML / CSS skills and experience building responsive interfaces;
  • Bash shell competence
  • Knowledge of Linux and server management

Linux Infrastructure Engineer


An exciting opportunity to work in the fast-paced, ever-evolving world of FinTech, helping to ensure and improve the quality of the ground-breaking technologies propelling the company’s rapid growth. 

Cardstream is going through a period of sustained business growth and consequently, is looking to recruit a Linux Infrastructure Engineer to join our Technical Operations and Delivery team based in Taunton, Somerset (occasional remote working considered). If you are looking for an opportunity to work in an award-winning team that will provide you with rewarding working benefits and great coffee, then Cardstream is the place for you. 

As a member of the technical Support team, you will be responsible for covering systems administration, network and server administration, PCI/GDPR administration, Device builds and troubleshooting along with client support. 



System Administration 

  • Assist the team in undertaking day-to-day maintenance of the internal IT estate and Office 365 
  • Attending relevant IT meetings and providing updates 
  • Carrying out monitoring of systems to ensure system health and security 
  • Maintaining and administering Linux servers 
  • Reviewing WAF logs as and when required 
  • MySQL/MariaDB database administration 
  • 1st line support for inbound technical support for onsite and remote employees 
  • Perform PCI/GDPR compliance checks 
  • Patching servers and responding to security alerts 
  • Laptop troubleshooting and builds  
  • System trend analysis and metric reporting 
  • Out of hours on call support  
  • Monitoring and renewal of MPI/SSL certificates  

Essential Requirements  

  • Technical Background or computer science/software engineering degree 
  • Experience working in an IT administration role. 
  • Knowledge of Windows 10 and Microsoft 365. 
  • Experience with SOHO routers, firewalls, and access points. 
  • Linux systems administration (CentOS/Ubuntu). 
  • Experience with ecommerce platforms such as WooCommerce and Magento. 
  • Good knowledge of MySQL. 
  • Basic understanding of email infrastructure, DNS, DHCP, etc 
  • Understanding of networks and network switching (Cisco). 
  • A technical predisposition, and the desire to learn.  
  • Exceptional organisational and time management skills   
  • Analytical and commercially sharp 
  • Excellent communicational skills, including verbally and written.   
  • High energy with the ability to multi-task and prioritise as appropriate.  
  • Ability to work on own initiative as well as within a diverse team.  
  • Strong API and Scripting skills. 
  • Knowledge of PHP and other programming languages 

 Desirable Requirements 

  • Payments, FinTech, SasS experience  
  • Detailed understanding of PCI:DSS; 
  • Experience with Postman for API testing; 
  • Knowledge of Zendesk and Jira 

Senior Quality Assurance Engineer


An exciting opportunity to work in the fast-paced, ever-evolving world of FinTech, helping to ensure and improve the quality of the ground-breaking technologies propelling the company’s rapid growth.

As the last stop between test environments and the live system, the Quality Assurance Engineer is responsible for ensuring all software is reliable, fully functional and user friendly before being released to the public. The ability to maintain rigorous compliance with project deliverables and industry/company standards is key in this role.

As a leading technological innovator, Cardstream’s ability to release new features underpinned by flawless code is key to the company’s remaining at the forefront of the FinTech industry.

Responsibilities and Skills

Main Responsibilities: 

  • Highlighting any risks and issues with mitigation and escalation advice to address problems and keep the deliveries on track.
  • Working with internal and external delivery teams, within a functional area to convert requirements into solid and scalable test suites.
  • Utilise test automation frameworks.
  • Coordinate and participate in feature requirements review for testability
  • Responsible for end-to-end product quality, including defect management, status reporting, and escalation for critical issues discovered during the testing phase.
  • Work closely with software engineers, product managers and assist in debugging, testing, and development of tools to help identify defects.
  • Perform automated and manual testing, including regression testing for each release cycle to ensure software meets business, performance, and security requirements.
  • Drive and help to establish best practices and testing processes.

Essential requirements:

  •  A basic understanding of JavaScript
  • An understanding of BDD
  • Proven experience using tools such as Cypress, Selenium or equivalent.
  • Excellent test analysis, test preparation and test execution skills;
  • Able to demonstrate experience of the full testing life-cycle;
  • Pragmatic problem-solving abilities;
  • Ability to analyse requirements down to a user story level
  • Time management when it comes to planning tasks
  • Enthusiastic, creative, motivated and keen to learn

Desirable requirements:

  • Proven experience in a similar role within Fintech
  • A basic understanding of PHP;
  • Ability to adapt to Cardstream’s existing processes and propose improvements.
  • Knowledge of understanding of PCI
  • Experience of working with Payment Gateways; and
  • Industry recognised qualification in testing e.g. ISTQB

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