Senior Full-Stack Engineer (React/Clojure for Analytics Platform)

We are looking for a Senior Full-Stack Engineer to join a high-impact internal analytics platform initiative at a mobile-first financial platform. This team is building and evolving internal products that give product, analytics, operations, and experimentation teams deep visibility into customer behavior, product funnels, event flows, and cross-platform interactions across a large-scale mobile ecosystem.

This role sits at the intersection of modern web product development, analytics infrastructure, and internal platform engineering. The work combines rich analyst-facing and back-office web experiences with contract-driven service integration over real-time and high-volume analytical data systems. The ideal candidate is comfortable owning complex frontend surfaces while also working effectively across backend services, query layers, and data-facing product workflows.

This is a true full-stack role with a strong product and platform component. On the frontend side, you should be able to build polished, high-density React applications with strong usability, performance, and maintainability. On the backend integration side, you should be comfortable working with service-oriented architectures, typed contracts, query services, and backend systems built in Clojure or similar functional / JVM environments.

As a Senior Engineer, you will help evolve internal analytics and experimentation workflows related to event exploration, product funnels, operational visibility, rollout controls, and instrumentation quality. You are expected to bring 5+ years of overall software engineering experience, including strong production experience building web applications with React and meaningful experience integrating with backend services in Clojure or adjacent ecosystems. The ideal candidate combines strong product judgment with engineering depth in environments where frontend delivery, service integration, and analytical data all need to work together reliably.

• React + TypeScript / JavaScript: Strong hands-on experience building production web applications with modern React, including component architecture, hooks, reusable abstractions, and maintainable UI systems for complex internal products.

• Clojure or Strong Adjacent Backend Experience: Production experience working on or deeply integrating with backend systems built in Clojure, or strong experience in adjacent JVM / functional ecosystems such as Scala, Kotlin, or Java with clear readiness to ramp into Clojure quickly.

• Full-Stack Product Ownership: Ability to work across frontend application layers and backend-facing integration concerns, contributing meaningfully to both user-facing product delivery and service-level technical design.

• Modern Web Platform Experience: Experience working across more than one React application model, including modern framework-based applications and mature SPA/back-office architectures. The team operates in a mixed environment rather than a single greenfield stack.

• Frontend-Inclined Strengths: Ability to build high-quality internal web products with strong UX for dense, data-heavy, read-intensive workflows such as tables, filters, charts, path analysis, funnel analysis, and analyst-facing operational screens.

• Backend-Inclined Strengths: Ability to work effectively with service-oriented architectures, HTTP APIs, typed contracts, auth-aware flows, backend-for-frontend patterns, query services, and large analytical payloads.

• Analytics and Data-Heavy Product Experience: Experience building products where event analytics, product usage data, operational insights, experimentation data, or other analytical workflows are central to the user experience.

• State Management: Ability to model local, shared, and remote state clearly using practical patterns such as React Query, Context, Redux, lightweight state stores, or equivalent approaches without unnecessary complexity.

• Schema-Driven Integration: Experience consuming contract-first APIs, generated clients, typed schemas, or strongly structured service interfaces, with emphasis on correctness and safe evolution between frontend and backend systems.

• Component Libraries and Design Systems: Experience building polished interfaces with mature component systems such as Ant Design, Material UI, Chakra, or similar libraries commonly used in internal operational platforms.

• Experimentation and Feature Flags: Practical experience with experimentation platforms, rollout controls, or feature-flag systems where gradual release, measurement, and operational safety matter.

• Instrumentation and Product Analytics: Strong understanding of event instrumentation, event schemas, funnel-oriented product analysis, and the practical realities of building software around behavioral data.

• Performance Optimization: Track record of diagnosing and improving bottlenecks across React rendering, browser performance, network behavior, and query-driven UI flows in data-heavy applications.

• Observability and Error Monitoring: Practical ability to instrument applications, investigate runtime issues, and work with logs, metrics, traces, and monitoring tools such as Sentry or equivalent platforms.

• Testing: Commitment to quality through unit, integration, and end-to-end testing using tools such as Jest, React Testing Library, Playwright, Cypress, or equivalent.

• Existing System Ownership: Ability to join mature products, understand constraints quickly, and improve them incrementally without destabilizing business-critical systems.

• English C1: Ability to communicate technical trade-offs clearly, participate in design discussions, and collaborate effectively in a remote, multicultural environment.

EXTRAS (Nice to have)

• Real-Time OLAP Experience: Previous work with Apache Pinot, Druid, ClickHouse, BigQuery real-time, or similar analytical systems that power operational or analyst-facing products.

• Analyst-Facing Product Experience: Experience building products for support, fraud, analytics, or business operations teams where large datasets and workflow efficiency are central to the user experience.

• Clojure Service Familiarity: Exposure to integrating with Clojure-based backend services or comfort ramping into teams where key backend domains are implemented in Clojure.

• Internationalization: Experience with runtime localization systems or externalized translation workflows beyond simple build-time string handling.

• Product Analytics and Funnel UX: Familiarity with event analytics, funnel exploration, segmentation workflows, or experimentation-oriented product interfaces.

• Functional or JVM Background: Background in Scala, Kotlin, Java, or functional design approaches can be valuable when paired with strong frontend and product-platform delivery skills.

Quick Skills Reference

• Languages: TypeScript, JavaScript, SQL, Clojure or adjacent JVM / functional language

• Frontend: React, Next.js, SPA Architecture, HTML5, CSS3, Accessibility, Data-Heavy UI

• Backend Integration: Clojure Services, HTTP APIs, Contract-First Clients, Auth-Aware Flows, Query Services, Service Integration

• State & UI: React Query, Redux or equivalent state patterns, Component Libraries, Design Systems

• Product Platforms: Internal Tools, Experimentation, Feature Flags, Operational Workflows

• Analytics: Product Analytics, Event Instrumentation, Funnel Analysis, Virtualized Tables, Charts, Real-Time Analytics

• Data / Infra Context: OLAP Systems, Analytical Query Services, Event Pipelines, Observability

• Quality / Tooling: Jest, React Testing Library, Playwright, Cypress, Sentry, CI/CD