Full Stack Engineer

Summary

Join Primer, a leading unified payment infrastructure company, and contribute to shaping the future of payments and commerce. We are seeking a Full-Stack Developer with a strong focus on frontend development (JavaScript/TypeScript + React) to improve and optimize our payment processing systems. You will enhance reliability, redesign data pipelines, ensure data accuracy, build A/B testing frameworks, and develop decision-based logic to optimize transaction success rates. This fully remote role offers competitive benefits, including uncapped holiday, co-working space access, generous learning budget, and medical insurance. We are hiring across several European locations but currently do not offer visa sponsorships or relocation packages. Primer values a diverse and inclusive workplace and encourages applications from individuals who may not meet every requirement.

Requirements

• A Full-Stack Developer with a strong focus on Frontend development (JavaScript/TypeScript + React)
• Someone comfortable working across the stack, with some backend experience (Python preferred) but primarily frontend-heavy
• Experience with testing frameworks and a good approach to writing testable, maintainable code
• Be willing to set goals, success metrics, driving and setting up sprints and driving refinement sessions of the tickets and driving delivery side on a day to day basis
• In-depth understanding of the entire development process (design, development and deployment)
• Highly motivated self-starter who values autonomy and getting things done
• Excellent verbal and written communication skills
• Experience working in a fast-paced environment

Responsibilities

• Improve and optimize fallback mechanisms to ensure seamless payment processing
• Enhance reliability by implementing smart routing and failover strategies
• Redesign data pipelines to improve monitoring, tracking, and real-time insights
• Ensure data accuracy and integrity across payment systems
• Build and refine an A/B testing framework to test different payment flows
• Develop if X, then Y decision-based logic to optimize transaction success rates
• Enable rapid iteration and data-driven improvements in the payments experience

Benefits

• We are fully remote
• 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
• Medical insurance
• A broad set of additional perks and benefits ( depending on location)