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Senior Backend Engineer – PayLink
Salla E-Commerce Platform. Design and build payment-critical backend services and APIs on Java / Spring Boot .
Core Competencies
Role fitCore Competencies
Use this summary to align your resume positioning with the role.
Demonstrates expertise in designing and building payment-critical backend services and APIs using Java and Spring Boot, with a strong focus on reliability, transactional integrity, and automated testing. Proven ability to mentor engineers and work with payment processors in a fintech environment.
Highest-signal resume keywords
Java Backend DevelopmentSpring Boot FrameworkPayments / Fintech ExperienceMicroservices ArchitectureAutomated Testing
ATS Keywords
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Hard Skills
JavaSpring BootMicroservicesREST API DesignRelational DatabasesTransactional IntegrityAutomated TestingContainersCI/CDEvent-Driven Flows
Soft Skills
Mentoring
Tools & Technologies
Payment ProcessorsAI Coding ToolsCloud PlatformsKafka
Industry Keywords
PaymentsFintechFinancial-Transaction Systems
Tech Stack
Tools & technologiesAWSAzureCloudJavaKafkaMicroservicesSpringSpring BootSpringBoot
About the role
Key responsibilities & impact- Design and build payment-critical backend services and APIs on Java / Spring Boot
- Ensure correctness and reliability under load
- Build robust integrations and event-driven flows
- Write thorough tests and help maintain high engineering standards
- Mentor mid-level engineers
Requirements
What you’ll need- 5+ years in Java backend with Spring Boot
- Hands-on payments / fintech experience is required — experience working on real payment or financial-transaction systems
- Hands-on experience with at least one payment processor or gateway (e.g. MPGS, Cybersource or mada) is required
- Strong microservices and REST API design
- Relational databases
- Solid grasp of transactional integrity and reliability
- Containers / CI/CD
- Strong automated testing
- Active day-to-day use of AI coding tools such as Claude Code is required
- Experience with more than one payment processor / gateway (nice to have)
- Cloud platforms (OCI, AWS or Azure) and Kafka (nice to have)