Senior Software Engineer, Backend

Primer

Senior Software Engineer designing and implementing backend services for Primer's unified payments infrastructure. Leading technical decisions and driving modern development practices in a remote environment.

Posted 6/5/2026full-timeRemote • 🇵🇱 PolandSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsPython

About the role

Key responsibilities & impact

Leading the design and implementation of core backend services for high performance, complex distributed systems
Taking ownership of key technology decisions, building for scale and optimising for output
Driving and using modern development practices such as BDD and TDD would be highly beneficial
Creating clear, modern, well tested code
Collaborating across teams in a product-driven environment
Conducting code reviews and continuously look at ways of improving our ways of working
Creating detailed internal documentation for the projects you work on

Requirements

What you’ll need

In-depth understanding of the entire development process (design, development and deployment)
Knowledge of building developer frameworks and workflows, allowing both customers and third-parties to integrate as seamlessly as possible
Experience in Python is advantageous (it's what we use!) but we have had success hiring engineers of any technical background and understand that people can adapt
Highly motivated self-starter who values autonomy and getting things done
Excellent verbal and written communication skills
Payments knowledge, always looking for ways to optimise our merchant developer experience
You will need to be based in: Poland, Portugal, Hungary, Romania or South Africa.

Benefits

Comp & perks

Competitive share options
Uncapped holiday, with 25 days minimum to be taken
Co-working space access
Workations & Company Retreat
The best equipment for your role
£500 towards your home office setup
Generous learning budget
Private Medical Insurance
A broad set of additional perks and benefits (depending on location)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

backend servicesdistributed systemsBDDTDDPythondeveloper frameworksworkflowscode reviewsdocumentationdevelopment process

Soft Skills

ownershipcollaborationmotivationautonomycommunication