Join Vibe.co's AdManager team as a senior fullstack engineer on a freelance contract with hybrid work in Paris. Build and maintain advertiser-facing features including campaign setup, reporting, creatives management, payments, and AI-powered workflows. Own projects end-to-end from design to production, collaborating with product managers and engineers. Use Next.js, React, Typescript, PostgreSQL, and backend APIs. Ensure reliability with monitoring, debugging, incident response, and codebase improvements. Bring strong backend fundamentals, production experience, and a collaborative mindset. Nice to have AdTech, campaign management, CTV, SaaS, Domain-Driven Design, Test-Driven Development, and AI-assisted development experience. Benefits include hybrid flexibility, annual offsite, and quarterly tech syncs.
What you'll do
Design, build, and evolve core AdManager features across campaign setup, reporting, onboarding, creatives management, payments, account management, and AI-powered workflows
Own complex initiatives from conception to production with minimal supervision
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Translate ambiguous product needs into clear technical plans, milestones, and production-ready features
Collaborate closely with product managers, engineers, and business stakeholders to deliver high-quality advertiser experiences
Build and maintain robust user-facing experiences using Next.js, React and Typescript
Design scalable APIs, services, database schemas, and domain models that remain maintainable as the platform grows
Work with PostgreSQL and backend systems to support reliable advertiser workflows and reporting experiences
Apply strong engineering practices, including testing, clear architecture, and thoughtful code reviews
Ship features with appropriate monitoring, logging, alerting, analytics, and observability
Investigate, debug, and resolve production issues for the systems you build
Contribute to incident response and postmortems with clear communication and ownership
Improve codebase maintainability, documentation, conventions, and developer experience beyond your assigned tickets
Understand advertiser workflows and proactively identify better product or technical solutions
Challenge weak assumptions and propose pragmatic alternatives that balance speed, business impact, and long-term quality
Use AI-assisted development workflows to accelerate delivery while maintaining a high bar for correctness and maintainability
Contribute positively to a shared codebase and a collaborative, low-ego engineering culture
Requirements
Strong experience shipping production-grade fullstack software, especially with Next.js, React, Typescript, backend APIs, and PostgreSQL
Proven ability to own projects end-to-end, from problem definition to rollout, monitoring, and long-term maintenance
Strong backend engineering fundamentals: API design, architecture, testing, data modeling, and system design
Ability to independently build and evolve complex user-facing experiences
Comfort operating in ambiguity, breaking down initiatives, identifying dependencies, managing risks, and keeping delivery momentum
Strong instincts for code quality, maintainability, and pragmatic technical decision-making
Experience taking responsibility for production systems, including monitoring, debugging, incident response, and postmortems
A collaborative, low-ego mindset and clear communication style, especially during project delivery and production issues
A strong sense of urgency, with the judgment to move fast without sacrificing reliability or long-term maintainability
Tech stack
Next.jsReactTypescriptPostgreSQLAPI designAI-assisted development
Benefits
Hybrid flexibility — We're in the heart of ParisAnnual offsite — The whole team, once a year, somewhere worth the tripTech Syncs — Engineering and Product meet in person at least quarterly, worldwide
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