Senior Software Engineer, Fullstack

🕒 May 20

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

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Firstup

WebsiteLinkedInAll Job Openings

201 - 500 employees

🏢 Enterprise

👥 HR Tech

☁️ SaaS

Enterprise • HR Tech • SaaS

Firstup is a comprehensive employee experience platform designed to deliver highly personalized communication at scale. It offers an intelligent communication platform that connects with any environment, while ensuring data security and infrastructure integrity. Firstup's solutions aim to engage employees through various channels including email, mobile apps, and intranet, making every interaction meaningful across the employee journey. The platform integrates seamlessly with tools like Microsoft 365 and ServiceNow to enhance service management and workforce productivity.

📋 Description

• 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. • Apply broad, in-depth knowledge to develop and maintain large-scale multi-tenant services in the cloud. • 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.

🎯 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.

🏖️ Benefits

• excellent PTO program • great health benefits • casual and friendly environment • remote work • leadership team that believes in your growth