Senior Software Engineer

About PetroApp:PetroApp is a fleet management and fuel payments platform used by businesses across Egypt, Saudi Arabia, Thailand and Nigeria. We run high-volume transactions, multi-country operations, and integrations with fuel stations, payment gateways and enterprise customers. Our products range from fleet and spend control to wallets, payments and mobile apps.The role:You'll own backend services in one of our product areas from design to production. You'll set the technical direction for your area and help raise the bar for the engineers around you. You'll work closely with Product, Design and other engineering teams, and you may move between product areas as the business grows.What you'll do:Design, build and scale backend services and APIs, following our API standardsOwn features end to end, from shaping requirements with Product to running them in productionDesign and optimize data models, queries and transactions, and use caching well, under real production loadBuild reliable integrations with external partners and third-party systemsDeliver features across the stack, including Angular (TypeScript) frontends when neededWrite design docs and ADRs, and drive technical decisions in your areaRaise quality through code reviews, automated testing and observabilityTake part in on-call and incident response, and lead fixes to root causesMentor engineers and help shape team practicesRequirements6+ years of software engineering experience, mostly backendDeep expertise in at least one backend language and its ecosystem (e.g. PHP, Java, Go, Node.js, Python, C#), plus the ability to pick up new ones quicklyStrong grasp of backend fundamentals: API design, distributed systems, async processing and queues, and cachingStrong relational database experience (e.g. MySQL, PostgreSQL), including transactions, locking and concurrencyExperience building and running high-traffic or transaction-heavy systems in productionWorking proficiency with a modern frontend framework, ideally Angular, Vue, and TypeScriptA track record of leading technical initiatives and mentoring engineersClear written communication: design docs, PR descriptions, incident write-upsBachelor's in Computer Science or equivalent practical experience