firstup - Sr. Software Engineer, Fullstack
Requirements
• Bachelor's degree in Computer Science or related field, or equivalent experience. • 5+ years building reliable, performant applications and microservices. • Strong proficiency in TypeScript and Node.js. Ruby experience is a plus. • Proven full-stack experience across frontend (React.js), backend, and database layers. • Technical depth in at least one specialisation: networking, security, serverless, event streams, or similar. • Strong AWS experience, including compute, storage, networking, and monitoring. • Excitement to build beautiful, intuitive products with a strong customer focus. • Innate curiosity and a desire to learn and teach. • Experience building and maintaining integrations with HRIS platforms such as Workday, SAP SuccessFactors, Dayforce, or similar enterprise HR systems. • Experience with Kubernetes, Docker, and Helm. • Experience with Datadog or similar observability and monitoring platforms. • Demonstrated use of Generative AI tools or coding agents in development workflows. • Experience in enterprise SaaS organisations, particularly HR Tech or regulated domains. • Familiarity with ML/AI integration in production systems. • Open-source contributions or a history of side projects.
Responsibilities
• Design, build, and maintain public-facing APIs and Agentic tools that enable enterprise customers to integrate with and extend the Firstup platform. • Develop and own integrations with external enterprise systems, including HRIS platforms such as Workday, SAP SuccessFactors, and Dayforce. • Build and maintain shared platform services used across the wider engineering organisation. • Write high-quality code (reliable, readable, efficient, testable, scalable, maintainable), provide thorough code reviews, and create comprehensive tests and documentation. • Actively use Generative AI tools and coding agents in day-to-day workflows to improve code quality and accelerate delivery. • Collaborate across teams on industry standards and best practices to help others solve complex problems. • Design future-ready solutions and address architectural gaps using modern microservices and cloud-native patterns. • Own production health for your services, contributing to on-call rotations, incident response, and post-incident reviews in a "you build it, you run it" environment. • Identify, analyse, and resolve system availability, reliability, and performance issues, contributing to observability and resiliency improvements. • Partner with Product Management and Design to translate business requirements into scalable technical solutions.
Benefits
• Because you care - about people, the work you do, and the connections you make. Work is such a large part of life; it only makes sense to make it awesome. • If you want to engage brilliant minds in a high-growth and inclusive environment where ideas are rewarded regardless of who they come from, join us. This is a rapidly changing space so if you thrive on ambiguity, are hungry for a challenge, and have the guts to speak your mind, you could be a perfect fit. • We offer an excellent PTO program, great health benefits, a casual and friendly environment, remote work, and a leadership team who truly believes in your growth – both personally and professionally.
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