Senior Product Engineer - Backend

Koinz is Saudi Arabia’s leading social food ordering experience the app that transforms everyday coffee and dining into a fun, rewarding, and shareable lifestyle.

With 2.7M+ signups, Koinz is more than a loyalty app it’s where Gen Z and young consumers discover brands, earn rewards, share experiences, and make food social.

Your mission is to build high-scale systems powering ordering, loyalty, and social experiences across thousands of merchants and millions of users.

As a Senior Product Engineer (Backend) who combines strong engineering skills with deep product thinking. Someone who cares about why we’re building, not just what we’re building. You’ll own features end-to-end from idea to production to post-release impact.

At Koinz, we don’t just build backend systems, we build products that users love.

What You’ll Do

• Own features end-to-end: from problem definition design development release monitoring iteration

• Build and evolve scalable backend services and APIs powering core Koinz experiences

• Translate product ideas into simple, scalable, and high-impact solutions

• Design systems that balance performance, reliability, and speed of iteration

• Continuously improve system performance (latency, throughput, cost efficiency)

• Use data (events, dashboards, session replays) to validate decisions and guide iterations

• Ensure production systems are reliable, observable, and easy to debug

• Work closely with Product, Mobile, and Design to shape user experiences — not just implement them

• Contribute to architectural decisions (microservices, integrations, system evolution)

• Take ownership of post-release outcomes: iterate, improve, or sunset features based on impact

Who You Are

• 5+ years of experience building backend systems in production environments

• Strong experience in at least one backend language (PHP, Node.js, Java, Go, or similar)

• Solid understanding of distributed systems and microservices architecture

• Strong product sense — you think in terms of user problems, not just technical tasks

• Experience designing APIs (REST/gRPC) and working with frontend/mobile teams

• Hands-on experience with relational and/or NoSQL databases

• Experience with cloud platforms (AWS, GCP, or Azure)

• Familiarity with Docker/Kubernetes or similar tooling

• Strong debugging and problem-solving skills in production environments

• Ability to make trade-offs between speed, scalability, and quality