> Markdown version of [/jobs/ext/4653269-backend-engineer](https://www.wearedevelopers.com/jobs/ext/4653269-backend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Backend Engineer - **Company:** Ai-assisted - **Location:** France - **Experience:** Expert - **Salary:** €99,000 - €133,000 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software as a Service, Code Review, Software Debugging, PostgreSQL, Node.Js, Next.js, Systems Architecture, TypeScript, Data Logging, Test-Driven Development (TDD), ReactJS, Backend, Figma, Front End Software Development, Api Design, Domain Driven Design - **Published:** November 10, 2026 - **Apply:** https://startup.jobs/staff-full-stack-engineer-admanager-vibe-8782574 ## About the Role * Modernized a legacy or fast-growing frontend * Figma-to-code workflow experience * Used AI-assisted development or design-to-code tools ## Description You'll join the team behind everything advertisers touch in Vibe: campaign setup, reporting, creatives, integrations, payments, and account management. The product has grown fast. We're adding two senior engineers, one Senior Frontend Engineer (Architecture & Design Systems) and one Senior Backend Engineer (APIs, Data & Reliability), to keep shipping at speed without dropping the bar on quality or reliability. You'll report to [Manager Name], [Title]. Three reasons to join: you'll ship product advertisers use every day, you'll work in a high-ownership, low-process team that uses AI-assisted development workflows, and you'll raise the bar for the whole team through code review and mentoring. Tell us which role you're applying for, Frontend or Backend. Open to both? Say so, and we'll talk it through., Your mission: give the frontend the structure it needs for the next phase of growth, and set the standards the team builds on. * Define the state management and component architecture for the advertiser-facing frontend * Set coding standards with clear boundaries between UI, business logic, state, and data fetching * Raise the maintainability, testability, and performance of the codebase * Drive design system adoption by building reusable components * Turn Figma designs into production-ready experiences alongside designers * Test AI-assisted design-to-code workflows to speed up delivery * Mentor engineers on frontend best practices through code review Senior Backend Engineer, APIs, Data & Reliability Your mission: own the services and data behind advertiser workflows, and keep them fast, correct, and reliable. * Design scalable APIs for campaign setup, reporting, and creatives management * Design PostgreSQL schemas that keep campaign data clean and queryable * Own initiatives from ambiguous requirement to production * Break initiatives into technical plans and milestones with PMs and engineers * Instrument every feature with monitoring, logging, and alerting before launch * Debug production issues, leading incident response through to the postmortem * Raise the team's testing standards through rigorous code review * Improve developer experience so the team ships faster, * Advanced TypeScript and React experience (Next.js is a plus) * Defined or significantly improved the architecture of an existing frontend codebase * Solved state management at scale: local, shared, server, and URL * Built, integrated, or maintained a design system * Introduced standards that other engineers adopted * Worked across the stack, including APIs and data models Senior Backend Engineer * Built production backend services and APIs (TypeScript/Node is a plus) * Strong PostgreSQL and data modeling skills * Strong fundamentals in API design and system architecture * Owned production systems: monitoring, debugging, incident response * Owned projects end to end, through long-term maintenance * Worked in React/Next.js on the frontend when the project called for it, * Background in CTV, streaming TV advertising, campaign management, or customer-facing SaaS * Applied Domain-Driven Design and Test-Driven Development * Built AI-powered products Our Values At Vibe, we run on three values: Impact, Ambition, and Urgency. We tie every goal to a real business outcome, think 10x rather than settling for good enough, and move daily rather than waiting for perfect conditions. You'll thrive here if you own outcomes without needing direction, default to action, and hold yourself to results, not effort. This is a high-performance environment with high-performance rewards: you'll work alongside people who push you, with real ownership over hard problems in a market that's moving fast.