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At Staffy, we're seeking a Senior Full-Stack Engineer to join a high-impact internal analytics platform initiative at a mobile-first financial platform. The team is responsible for building and evolving internal products that provide Product, Analytics, Operations, and Experimentation teams with deep visibility into customer behavior, product funnels, event flows, and cross-platform interactions across a large-scale mobile ecosystem.
We are looking for a professional who can own complex frontend experiences while actively contributing to backend services built in Clojure. This is a true full-stack role with a strong product and platform focus, requiring hands-on expertise in both React and Clojure to build scalable, data-driven internal products.
As a Senior Engineer, you will contribute to analytics and experimentation workflows related to event exploration, product funnels, operational visibility, rollout controls, and instrumentation quality while helping evolve a business-critical platform used across multiple teams.
Build and maintain high-quality React applications supporting analytics, operations, experimentation, and internal business workflows.
Design, develop, and maintain backend services and APIs using Clojure.
Design and deliver analyst-facing and back-office experiences focused on usability, performance, and maintainability.
Collaborate with backend services, query layers, and analytical data systems to support product workflows.
Contribute to service integration using contract-driven APIs, typed schemas, and structured backend interfaces.
Support experimentation workflows, rollout controls, feature flag systems, and operational tooling.
Develop and improve event exploration, funnel analysis, instrumentation quality, and product analytics experiences.
Optimize frontend performance across rendering, browser behavior, network interactions, and query-driven user interfaces.
Implement and maintain testing strategies across unit, integration, and end-to-end testing layers.
Instrument applications and collaborate on observability initiatives, monitoring runtime behavior and investigating production issues.
Work within mature products and platforms, delivering improvements while maintaining the stability of business-critical systems.
Participate in technical discussions, architecture decisions, and cross-functional collaboration within a remote environment.
5+ years of software engineering experience.
Strong hands-on experience with React, TypeScript, and JavaScript, including component architecture, hooks, reusable abstractions, and maintainable UI systems.
Production experience developing backend services with Clojure.
Ability to contribute across both frontend application development and backend services.
Experience working with modern React frameworks as well as mature SPA and back-office architectures.
Experience building data-intensive products involving tables, filters, dashboards, charts, path analysis, funnel analysis, and operational interfaces.
Strong understanding of service-oriented architectures, HTTP APIs, typed contracts, authentication-aware flows, backend-for-frontend patterns, query services, and analytical payloads.
Experience building analytics-focused products where event data, operational insights, experimentation, or behavioral analytics are central to the user experience.
Experience managing local, shared, and remote state using React Query, Context API, Redux, or similar solutions.
Experience consuming contract-first APIs, generated clients, typed schemas, and structured service interfaces.
Experience working with component libraries and design systems such as Ant Design, Material UI, Chakra UI, or similar.
Practical experience with experimentation platforms, rollout controls, and feature flag systems.
Strong understanding of event instrumentation, event schemas, funnel analysis, and behavioral data workflows.
Experience diagnosing and improving frontend performance in data-heavy applications.
Experience with observability, monitoring, logging, metrics, tracing, and tools such as Sentry.
Experience implementing unit, integration, and end-to-end testing using Jest, React Testing Library, Playwright, Cypress, or similar.
Ability to understand existing systems quickly and improve them incrementally while maintaining platform stability.
English level C1 with excellent communication skills in remote and multicultural environments.
Experience with real-time OLAP systems such as Apache Pinot, Druid, ClickHouse, BigQuery Real-Time, or similar analytical platforms.
Experience building analyst-facing products for support, fraud, analytics, or business operations teams.
Experience with internationalization and localization workflows.
Familiarity with product analytics, segmentation, funnel exploration, and experimentation-oriented user experiences.
People First culture.
Free access to streaming platforms.
Free access to Spotify Premium.
GYM discount.
Travel discount.
E-Learning discount.
Birthday day.
We are a fast-growing technology consulting company specialized in connecting top talent with innovative projects across Latin America and the United States. We support organizations of different sizes and industries in building high-performing teams through recruiting, outsourcing, and team-building services.
Our culture is built on trust, transparency, and collaboration. We value autonomy, continuous learning, and professional development, creating environments where people can grow, contribute ideas, and make an impact from day one.
Today, more than 60 professionals work remotely, collaborating on challenging projects with international teams and leveraging cutting-edge technologies to solve real business problems.