Senior Fullstack Engineer ( Golang / React )

Job description

The Home Platform team is responsible for building and scaling the systems behind one of the most frequently used experiences on Zalopay. Our mission is to provide a fast, reliable, and extensible platform that enables users to conveniently discover and access relevant products and services.

Our platform brings together data and capabilities from multiple systems to deliver consistent, data-driven experiences at scale. We build both backend services and user-facing components, with a strong focus on performance, availability, extensibility, and operational excellence.

We are looking for a Software Engineer / Senior Software Engineer (Golang/React) who enjoys solving backend and distributed-system challenges while being comfortable contributing to frontend development. This is a backend-focused fullstack role, with approximately 70% Backend and 30% Frontend responsibilities.

Depending on your experience, you will own features end to end or lead the design and delivery of larger technical solutions within the Home Platform.

Responsibilities

You will:

• Design, build, and maintain high-performance backend services that support core user experiences on Zalopay.
• Develop scalable and maintainable APIs using Golang, HTTP, and gRPC.
• Build event-driven and near-real-time data-processing workflows.
• Design data models, caching strategies, and storage solutions for performance, reliability, and scalability.
• Integrate with multiple internal platforms and services to deliver end-to-end product capabilities.
• Ensure reliability across distributed workflows through appropriate handling of concurrency, idempotency, timeouts, retries, and failures.
• Develop and maintain scheduled or batch-processing jobs where appropriate.
• Improve system performance, observability, monitoring, and production traceability.
• Troubleshoot production issues and drive technical problems through resolution.
• Develop user-facing web components using React and TypeScript.
• Implement API integration, state management, loading and error handling, and event tracking on the frontend.
• Optimize frontend performance and user experience across mobile environments.
• Write clean, maintainable, and well-tested code, including unit and integration tests.
• Conduct code reviews and contribute to technical standards and engineering best practices.
• Collaborate closely with Product, Design, Mobile, QA, Data, and other Engineering teams to deliver features end to end.
• Senior candidates are expected to lead solution design, drive technical improvements, and mentor other engineers.

Your skills and experience

You may be a good fit for this role if you:

• Hold a Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
• Have at least 4 years of professional software development experience; senior-level candidates should demonstrate strong ownership of production systems and technical design.
• Have strong proficiency in Golang, including practical knowledge of concurrency and performance optimization.
• Have hands-on experience with React and TypeScript and are comfortable contributing to frontend development.
• Have solid experience in backend system design, including API design, data modeling, service decomposition, and microservices.
• Have strong knowledge of relational databases such as MySQL or PostgreSQL, including indexing, query optimization, and performance tuning.
• Have hands-on experience with Redis or similar caching technologies.
• Have experience with Kafka or another message queue/event-streaming platform.
• Understand distributed-system concepts such as idempotency, concurrency control, eventual consistency, retry strategies, and failure handling.
• Have experience building, operating, and troubleshooting production systems.
• Have experience writing unit, integration, automation, or end-to-end tests.
• Demonstrate strong problem-solving skills, end-to-end ownership, and the ability to work effectively in a fast-paced environment.

Nice to have:

• Experience building high-traffic, consumer-facing products.
• Experience with data-intensive or near-real-time processing systems.
• Experience running services in Kubernetes.
• Familiarity with feature flags, A/B testing, and controlled rollout strategies.
• Experience optimizing React applications for mobile or embedded web environments.
• Experience with observability, performance monitoring, and production incident investigation.
• Experience in FinTech, payments, e-commerce, or other large-scale digital platforms.
• Ability to work closely with non-technical stakeholders and translate product requirements into reliable technical solutions.

Why you'll love working here

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