Senior Backend Engineer | Feeld

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Backend Engineer based in Ireland. As a Senior Backend Engineer, you will help develop and strengthen the backend infrastructure of an inclusive, mobile-first digital platform. You will take ownership of complex technical challenges, investigating and resolving backend issues while improving system performance, scalability, and reliability. Working primarily with Node. js, NestJS, TypeScript, and AWS, you will build resilient services and APIs that support a growing user base. You will also contribute to real-time functionality and event-driven architectures while safeguarding data integrity. Collaborating closely with Product, QA, and other engineering teams, you will help shape technical decisions and deliver meaningful product improvements. This remote opportunity offers significant autonomy and the chance to contribute to a product focused on creating more inclusive human connections. Accountabilities You will play a key role in the development, optimization, and maintenance of backend systems, combining hands-on engineering with technical investigation and architectural contributions. - Design, develop, and deploy scalable, resilient backend services using cloud-first architectures, NoSQL databases, and event-driven technologies. - Investigate complex backend issues, lead technical troubleshooting, identify root causes, and define clear paths toward resolution. - Optimize system performance, reliability, availability, and data integrity as the platform scales. - Build and maintain well-structured, self-documented APIs using NestJS, GraphQL, and REST. - Develop and maintain real-time application features using WebSockets. - Contribute to architectural decisions and technical direction, working independently and taking ownership of complex initiatives. - Collaborate with cross-functional teams, including Product Management and QA, to design, deliver, and improve high-quality features. - Implement effective unit and integration tests to ensure code quality and system stability.

- Apply observability and monitoring practices to identify issues, track performance, and improve operational resilience. - Develop a strong understanding of the product and its mobile-first environment to ensure backend solutions support user and business needs. Requirements The ideal candidate is an experienced backend engineer with strong Node. js expertise, a solid understanding of cloud infrastructure and distributed systems, and the ability to contribute independently in a collaborative product environment. - At least 5 years of professional backend development experience using Node. js. - Strong proficiency in TypeScript. - Demonstrated experience building backend services and self-documented APIs with NestJS, using GraphQL and/or REST. - Strong understanding of event-driven architectures, NoSQL databases, and cloud-native application development. - Hands-on experience with AWS services, particularly ECS, DynamoDB, SQS, EventBridge, and PostgreSQL. - Practical experience developing real-time features using WebSockets. - Familiarity with observability and monitoring tools such as Sentry, Datadog, CloudWatch, and Amplitude. - Experience writing reliable unit and integration tests. - Previous experience in a mobile-first organization, with the ability to understand product requirements from an engineering perspective. - Strong problem-solving and analytical skills, including the ability to investigate complex systems and work through technical challenges independently. - Full professional proficiency in English. - Strong collaboration and communication skills, with the flexibility to adapt to different working approaches. Additional experience that would be an advantage: - Experience with Infrastructure as Code tools, particularly Terraform.