11 hours ago
Sofia, BulgariaSenior
Responsibilities
- Design and build acquiring capabilities covering authorization, clearing, and settlement processing.
- Develop production APIs, data models, and services for the acquiring platform.
- Build reporting, back-office, and operational tools for day-to-day acquiring operations.
- Ensure systems meet card-scheme, security, and compliance requirements.
- Create observability, monitoring, and incident-response foundations for an always-on payments platform.
- Collaborate with Processing, Reconciliation, Risk, Compliance, Finance, and Treasury teams.
- Contribute to architecture decisions and own medium-to-large technical initiatives spanning multiple teams.
- Identify and prioritize technical debt, operational risks, and platform improvements.
- Mentor teammates and contribute to code reviews, testing practices, and on-call practices.
Requirements
- 5+ years of professional software engineering experience, including hands-on Go experience.
- Experience building and consuming APIs in production environments.
- Understanding of software architecture, design principles, data modeling, API design, and SOLID principles.
- Experience with SQL and NoSQL databases; PostgreSQL and Kafka experience is valuable.
- Practical experience with Docker, AWS, and Kubernetes.
- A DevOps mindset and interest in building, operating, and improving owned systems.
- Strong problem-solving skills and a methodical approach to investigating complex issues.
- Collaborative working style, openness to feedback, ownership, and accountability.
- Experience with Elixir or another functional programming language is advantageous.
- Experience with AWS Prometheus and Grafana is advantageous.
- Fintech, payments, or other regulated-domain experience is advantageous.
- Knowledge of card schemes, acquiring, authorization, clearing, or settlement is advantageous.
Tech Stack
Categories
About SumUp
SumUp builds card readers, point-of-sale apps, and payment tools for small businesses, along with accounts, invoicing, and online checkout. It sells hardware and earns fees on payment processing and subscriptions for software and services such as invoicing and loyalty. Founded in 2012 and headquartered in London, the company serves more than 4 million merchants across 30+ markets, and offers options like payment links and Tap to Pay.