Fullstack Engineer

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We build production web applications for clients, and we like engineers who are comfortable owning a feature from the database to the interface. As a Senior Fullstack Engineer, you work across React / Next.js and Node / TypeScript to design, build, and ship features that stay reliable in production.

You’ll work inside a Monks delivery team, alongside clients, product, and design, taking real ownership of the parts of the product you build.

We’re all-in on agentic engineering. Tools like Claude Code and Codex are part of our everyday workflow, and we’re looking for people who are genuinely fluent working alongside AI coding agents and excited to push those practices further.

Who You Are

• Comfortable across the whole stack: you move between frontend and backend without friction.

• Ownership-minded: you take a feature from idea to shipped, and you sweat the details.

• A pragmatic problem-solver: you pick the simplest thing that works and holds up.

• A clear communicator: you keep clients and teammates in the loop without noise.

What You'll Do

• Design, build, and maintain features across the frontend (React / Next.js) and backend (Node / TypeScript).

• Build and consume APIs, and model the data behind them.

• Review code, including AI-generated code, for quality and consistency.

• Collaborate with product, design, and other engineers to ship end to end.

• Troubleshoot and resolve production issues.

• Contribute to the team's standards, tooling, and practices.

What You Bring

• 5+ years building and shipping full-stack web applications.

• Strong TypeScript: React and Next.js on the front end, Node on the back end.

• Solid API design and data modeling.

• Experience building on AWS.

• Good testing habits and an eye for maintainable code.

• Strong English communication skills.

• Comfortable in a fast-paced, agile consulting environment.

Extra Credit

• You've worked on AI-heavy products or integrated LLMs.

• Deep PostgreSQL experience.

• You've built or maintained a design system.

• Familiarity with CI/CD and DevOps practices.

• Open-source work you're proud to link.

**About Monks **

Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact.

Monks was named a Contender in The Forrester Wave: Global Marketing Services, ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization, Monks was also awarded Business Intelligence Group’s 2025 Excellence in Artificial Intelligence Award in both the Organizational and AI Product categories. As a trusted partner to cutting-edge innovators in tech, Monks earned titles such as Optimizely Experimentation Partner of the Year (2025), runner-up for the Adobe Firefly Partner Award (2024), and Workato’s AI Visionary Customer Impact Award (2024). Additionally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner.

We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.