Join a cross-functional team as a Senior Full Stack Engineer, driving high-quality software solutions using Ruby and React while ensuring code quality and operational excellence.
Please note that we will never request payment or bank account information at any stage of the recruitment process. As we continue to grow our teams, we urge you to be cautious of fraudulent job postings or recruitment activities that misuse our company name and information. Please protect your personal information during any recruitment process. While Monks may contact potential candidates via LinkedIn, all applications must be submitted through our official website (monks.com/careers).
We are seeking a highly experienced and seasoned Senior Full Stack Engineer to join our cross-functional team as a key individual contributor. This pivotal role requires a balanced expertise in both backend and frontend technologies, with a 50/50 split focused on delivering high-quality, end-to-end software solutions.
You will be expected to drive features from architectural conception through to deployment, working across modern Ruby microservices and scalable React single-page applications. This position demands a high degree of autonomy, strong collaborative skills, and a commitment to code quality, testing, and operational excellence, including contributions to our CI/CD pipelines.
Full-Stack Ownership: Take complete ownership of feature development, encompassing technical design, implementation, comprehensive testing, and eventual deployment across both the frontend and backend.
Backend Engineering (Ruby): Design, build, and maintain efficient, reusable, and reliable code for new and existing backend microservices and APIs using Ruby.
Frontend Development (React): Develop complex user-facing features and enhance existing modern single-page applications using React and its core ecosystem.
API Design: Architect, build, and maintain robust and scalable RESTful APIs to serve the application and external integrations.
Technical Governance & Testing: Contribute significantly to technical design discussions, component architecture, and uphold quality by writing comprehensive unit and integration tests.
DevOps & Deployment: Contribute to the operational excellence of new services, including the occasional setup and configuration of CI/CD pipelines.
Collaboration: Collaborate closely and continuously with product managers, UX/UI designers, and other engineers within an agile and highly autonomous environment.
Problem Solving: Proactively identify performance bottlenecks and bugs across the stack, devising and implementing effective solutions.
Extensive Experience: 8+ years of professional software development experience in a full-stack capacity.
Deep Backend Expertise (Ruby): Demonstrated deep expertise in backend development using Ruby, including significant experience building and maintaining services outside of a large Ruby on Rails monolith.
Strong Frontend Proficiency (React): Strong proficiency in frontend development, specifically with React and its modern component-based architecture.
State Management: Hands-on experience implementing and managing application state using advanced tools like Redux or Redux Toolkit (RTK).
Data & API: Proven experience designing, building, and maintaining scalable RESTful APIs and strong knowledge of PostgreSQL, including basic ORM and query optimization skills.
Containerization & Orchestration: Required hands-on experience utilizing Docker and Kubernetes for containerization, deployment, and orchestration in a production environment.
Quality Commitment: A strong, demonstrable belief in automated testing and extensive experience writing comprehensive unit and integration tests across the stack.
Autonomy & Communication: Proven record of high autonomy, strong ownership, excellent communication, and effective collaboration skills.
Hands-on professional experience with the Ruby on Rails framework.
Familiarity and practical experience with TypeScript in a large-scale React application.
Experience with other backend languages such as Python or Golang.
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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.
Monks offers a distinctive blend of global marketing and technology services to enhance how brands connect with consumers in a digital-first world. By harnessing data-driven insights and innovative strategies, it aims to redefine brand interactions for a wide spectrum of clients.
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