Sonika Sonika
8+ years exp
20+ projects
Java
API Design: 4/10
Data Layer & Database: 4/10
Scalability & Performance: 4/10
Active 2 days ago
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Overview
Technical skills
Roles
Overview
API-focused backend engineer (Middle) with a practical strength in building GraphQL APIs using Spring Boot and the DataLoader pattern. The strongest proven skill is reducing N+1 problems and wiring mapped batch loaders as shown in the ProductController batchLoaderRegistry and the ProductService batching/async helpers. There is limited evidence of production-grade operational concerns such as migrations, auth/token handling, retries/timeouts, or large-scale service decomposition.
Technical skills
Java• Architect • 8y+ • 20+ projects
Frontend
React.js• 4 projects
React Router• 4 projects
Middle Backend Developer
Confidence: Medium API Engineer
API-focused backend engineer (Middle) with a practical strength in building GraphQL APIs using Spring Boot and the DataLoader pattern. The strongest proven skill is reducing N+1 problems and wiring mapped batch loaders as shown in the ProductController batchLoaderRegistry and the ProductService batching/async helpers. There is limited evidence of production-grade operational concerns such as migrations, auth/token handling, retries/timeouts, or large-scale service decomposition.
API Design
4/10
How well APIs are designed
Clear GraphQL API design with mapped DataLoader registration and schema-level resolver wiring, but no evidence of API versioning, idempotency strategy, or pagination/large-result handling.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/controller/ProductController.java - BatchLoaderRegistry registration and @QueryMapping/@MutationMapping/@SchemaMapping usage
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/exception/GraphqlExceptionHandler.java - GraphQL exception handler
Data Layer & Database
4/10
Working with databases
Reasonable use of JPA entities and Spring Data repositories with service-layer encapsulation and basic integrity via JPA annotations, but no migration history or explicit transaction/isolation controls shown.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/entity/Product.java - JPA entity with @OneToOne Price mapping
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/service/ProductService.java - repository usage and save/find operations
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/DataloaderApplication.java - DB seeding (initDB)
Scalability & Performance
4/10
Handling load and speed
Shows performance-awareness via GraphQL DataLoader batching and some async (CompletableFuture), but lacks broader scalability work such as caching with invalidation, queue-based decoupling, connection-pool tuning or measured load testing artifacts.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/controller/ProductController.java - mapped batch loader that prevents N+1
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/service/ProductService.java - CompletableFuture.supplyAsync getProductsByIds
System Architecture
3/10
Overall system structure
Conventional, sensible layering (controller-service-repository) and some wiring for validation directives, but no evidence of multi-service architecture trade-offs, graceful degradation across services, or secret/config management for production.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/controller/ProductController.java - controller layer exposing GraphQL endpoints
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/service/ProductService.java - service layer logic
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/configuration/GraphQlConfig.java - runtime wiring for validation
Security & Auth
2/10
Protecting data and access
Minimal security posture visible; basic GraphQL validation wiring and exception handling are present but there is no auth/authz, token lifecycle, input sanitization beyond schema directives, or secrets hygiene demonstrated.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/configuration/GraphQlConfig.java - ValidationSchemaWiring directive setup
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/exception/GraphqlExceptionHandler.java - centralized GraphQL exception handler
Reliability & Observability
3/10
Stability and monitoring
Basic observability and reliability signals such as SLF4J logging and an exception handler are present, but there are no retries with backoff, timeout boundaries, structured correlation ids, or metrics/alerting artifacts.
Evidence
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/service/ProductService.java - log statements using lombok @Slf4j
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/controller/ProductController.java - log statements in controller
GraphqlDataloader/dataloader/src/main/java/com/ebay/dataloader/exception/GraphqlExceptionHandler.java - GraphQL exception mapping
Expertise
Java• Middle
Microservices & API Architecture• Middle
Industries
Commerce• Middle
Recommendations
- Develop GraphQL-backed APIs and data-access layers that use DataLoader batching and async patterns for throughput-sensitive endpoints.
- Work on production hardening tasks: schema migrations, transactional boundaries, timeouts/retries with backoff, and integration tests to increase reliability.
- Build full-stack prototypes combining the existing React frontends with Spring GraphQL backends to improve end-to-end design and contract testing.
Repositories
The developer's experience in this domain has been verified based on AI analysis of the following repositories:
Intern Frontend Developer
Confidence: Medium UI Engineer
A Junior frontend engineer focused on React-based UI work with a clear strength in building small single-page interfaces and component-level styling. The strongest proven skill is practical React state and UI wiring as shown by the Context + useReducer localStorage persistence (src/context/GlobalState.js) and component usage in src/components/ResultCard.js. There is little evidence of advanced state discipline (cancellation, optimistic updates), formal accessibility tooling, automated tests, or large-system architecture in the public code.
UI Component Architecture
3/10
How interface parts are built
Basic component breakdown and separation of concerns using React components and Context API, but no evidence of a custom design system or complex composition patterns.
Evidence
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/components/ResultCard.js
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/context/GlobalState.js
ReactSimpleCalculatorProject/src/App.js
Responsive & Cross-browser
2/10
Works on all screens and browsers
Responsive layout via CSS media queries and grid is present, but no advanced responsive techniques (container queries, RTL, or i18n readiness) are evident.
Evidence
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/App.css
Performance Optimization
2/10
Speed of the interface
Shows awareness of performance measurement (web-vitals) but no concrete measured optimizations, code-splitting, or virtualization patterns in the application logic.
Evidence
ReactSimpleCalculatorProject/src/reportWebVitals.js
Accessibility & Semantics
2/10
Usable for everyone
Some basic semantic attributes exist (img alt, disabled buttons) but no explicit ARIA, focus management, keyboard handling for custom widgets, or CI a11y checks.
Evidence
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/components/ResultCard.js
State Management & Data Flow
3/10
Managing data in the app
Uses Context + useReducer and persists state to localStorage with useEffect, demonstrating basic app-state discipline but lacking advanced server-state patterns, cancellation, optimistic updates or race handling.
Evidence
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/context/GlobalState.js
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/components/ResultCard.js
UX & Visual Polish
3/10
Look and feel quality
Visual polish with CSS, hover states and disabled states are implemented, but UX edge states (loading, empty, skeletons, undo) and measured perceived performance are limited.
Evidence
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/App.css
MovieAddToWatchListReact/movie-watchlist-react-master/movie-watchlist-react-master/src/components/ResultCard.js
Expertise
React• Intern
HTML & CSS• Intern
Industries
Media & Entertainment• Intern
Recommendations
- Develop small-to-medium React single page apps and UI features where Context/useReducer and localStorage persistence are sufficient.
- Prototype and implement component-driven UI work and theming, taking ownership of component boundaries and CSS modules or tokens.
- Work on polishing accessibility, edge states (loading/empty/error), and add basic unit/integration tests to increase production readiness.
- Improve state discipline on data-fetching flows by introducing request cancellation, server-state caching (e.g., React Query), and optimistic update patterns.
Repositories
The developer's experience in this domain has been verified based on AI analysis of the following repositories: