Firstup

2 months ago

Sr. Software Engineer, Fullstack

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 3 hours agoStatus: Live

Job Summary

Senior Full Stack Engineer responsible for building and owning scalable SaaS applications end-to-end across frontend, backend, and data layers. Design future-ready architectures, drive performance and reliability, champion shift-left testing, and leverage AI-assisted tools to accelerate delivery while mentoring others and collaborating closely with Product and Design.

Location: United Kingdom

Workplace: Remote

Employment Type: Full time

Job Function: Software Engineering

Seniority: Manager level

Key Responsibilities

•Core Engineering & Ownership: Build and own scalable SaaS applications end-to-end — frontend, backend, and data layers. Write production-grade code that is reliable, readable, efficient, and testable. Raise the bar through thoughtful code reviews and comprehensive documentation.
•System Architecture: Design future-ready architectures and proactively close gaps before they become problems.
•Performance & Reliability: Drive system availability and performance — investigate, analyze, and resolve reliability issues across the stack. Recognize opportunities and advocate for better performance and efficiency of software, systems, and processes across teams.
•Shift Left Testing & Quality: You champion a rigorous 'shift-left' quality culture, embedding comprehensive testing—unit, integration, and contract—early and continuously in the development lifecycle, not as an afterthought.
•AI Integration: Leverage and advocate for AI-assisted tools (e.g., GitHub Copilot, Claude) to accelerate development while maintaining rigorous engineering judgment and accountability for code correctness.

Key Requirements

•Bachelor's degree in Computer Science or related field, or equivalent experience.
•5+ years building reliable, performant applications and microservices in production environments. Proven full stack fluency - you're comfortable across frontend, backend, and the database layer.
•A polyglot mindset — you evolve with the tech. Familiarity with Ruby on Rails, TypeScript, Node.js, or React.js is a strong plus.
•Proven full-stack experience across frontend (React.js), backend, and database layers.
•Technical depth in at least one engineering domain: distributed systems, multi-tenant SaaS, application databases, networking, security, serverless, event streaming, or similar.

Experience:5+ yearsSaaSSoftwareFull stackMicroservices

Education:Bachelor's

Skills:React.jsRuby on RailsTypeScriptNode.js

Tech Stack:Ruby on RailsTypeScriptNode.jsReact.js

Company Brief

Firstup

Provides an employee communication and engagement platform that helps organizations deliver personalized internal communications, measure engagement, and empower frontline and deskless workers through targeted content distribution and analytics.

Industry: HR Tech

Company Size: Large (251 to 1,000 employees)

Growth: Scaleup

Website

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Firstup

2 months ago

Sr. Software Engineer, Fullstack

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 3 hours agoStatus: Live

Job Summary

Location: United Kingdom

Workplace: Remote

Employment Type: Full time

Job Function: Software Engineering

Seniority: Manager level

Key Responsibilities

•Core Engineering & Ownership: Build and own scalable SaaS applications end-to-end — frontend, backend, and data layers. Write production-grade code that is reliable, readable, efficient, and testable. Raise the bar through thoughtful code reviews and comprehensive documentation.
•System Architecture: Design future-ready architectures and proactively close gaps before they become problems.
•Performance & Reliability: Drive system availability and performance — investigate, analyze, and resolve reliability issues across the stack. Recognize opportunities and advocate for better performance and efficiency of software, systems, and processes across teams.
•Shift Left Testing & Quality: You champion a rigorous 'shift-left' quality culture, embedding comprehensive testing—unit, integration, and contract—early and continuously in the development lifecycle, not as an afterthought.
•AI Integration: Leverage and advocate for AI-assisted tools (e.g., GitHub Copilot, Claude) to accelerate development while maintaining rigorous engineering judgment and accountability for code correctness.

Key Requirements

•Bachelor's degree in Computer Science or related field, or equivalent experience.
•5+ years building reliable, performant applications and microservices in production environments. Proven full stack fluency - you're comfortable across frontend, backend, and the database layer.
•A polyglot mindset — you evolve with the tech. Familiarity with Ruby on Rails, TypeScript, Node.js, or React.js is a strong plus.
•Proven full-stack experience across frontend (React.js), backend, and database layers.
•Technical depth in at least one engineering domain: distributed systems, multi-tenant SaaS, application databases, networking, security, serverless, event streaming, or similar.

Experience:5+ yearsSaaSSoftwareFull stackMicroservices

Education:Bachelor's

Skills:React.jsRuby on RailsTypeScriptNode.js

Tech Stack:Ruby on RailsTypeScriptNode.jsReact.js

Company Brief

Firstup

Industry: HR Tech

Company Size: Large (251 to 1,000 employees)

Growth: Scaleup

Website