Senior Fintech Backend Engineer - Payments & Checkout

Salla

Jeddah

On-site

SAR 260,000 - 420,000

Full time

14 days+

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Job summary

Salla is seeking a Senior Backend Engineer to join the Checkout team, focusing on Fintech, Checkout, and Promotions. You will design, build, and scale backend systems powering payment experiences, promotions, loyalty, pricing, and financial services at scale.

Ideal candidates excel in distributed systems, high-performance services, and AI-assisted development to improve quality, testing, and delivery speed. Collaborate across Product, Design, Data, and Engineering to deliver reliable systems.

Qualifications

6+ years of professional software engineering experience building production backend systems.
Strong experience building scalable backend services in at least one modern language such as PHP, Go, Java, or C#.
Experience with PHP and Laravel is preferred but not required.
Strong understanding of distributed systems fundamentals, including consistency, availability, concurrency, fault tolerance, idempotency, asynchronous processing, messaging, and caching.
Experience designing and operating high-scale, highly available backend systems.
Proven ability to write clean, maintainable, efficient, and high-performance production code.
Strong understanding of software engineering principles, including SOLID, design patterns, clean architecture, and domain-driven design concepts.
Experience designing RESTful APIs and integrating with third-party platforms and payment providers.
Strong SQL knowledge with experience designing and optimizing MySQL or PostgreSQL databases.
Experience with caching technologies, queues, background workers, and performance optimization.
Experience writing automated tests, participating in code reviews, and working within modern CI/CD pipelines.
Comfortable using AI-assisted development tools to improve productivity, software design, implementation, testing, debugging, documentation, and code reviews.

Responsibilities

Design, build, and operate scalable backend services supporting Fintech, Checkout, Promotions, Loyalty, and Payment systems.
Develop clean, maintainable, and high-performance production code with readability and long-term ownership in mind.
Design and evolve RESTful APIs and integrations with internal platforms, payment gateways, and third-party services.
Build reliable distributed systems capable of handling high traffic, failures, and asynchronous workloads.
Drive architectural decisions with scalability, resilience, maintainability, and operational excellence in mind.
Optimize application performance across services, databases, caching layers, queues, and background workers.
Participate in architecture discussions, technical design reviews, RFCs, and engineering planning.
Ensure services are production-ready through monitoring, logging, alerting, testing, and observability best practices.
Write comprehensive unit and integration tests while maintaining high engineering standards through code reviews.
Leverage AI-assisted engineering tools responsibly to accelerate development, debugging, testing, documentation, and code quality.
Mentor junior and mid-level engineers through technical leadership, design discussions, and engineering best practices.
Contribute throughout the full software development lifecycle, from design through deployment and production support.
Continuously improve system reliability, developer experience, and engineering standards across the team.