Front End Developer

Infinity Constellation

. Wire up the BFF client: consume the checked OpenAPI contract via generated clients, and establish stable success/error envelopes, request IDs, idempotency-key and If-Match plumbing, and loading/empty/error/permission state scaffolding.

Posted 7/28/2026contractRemote • 🇺🇸 United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in React and Next.js for building robust, performance-oriented user interfaces, with a strong focus on contract-first client consumption and identity-aware UI. Proficient in creating data-dense visualizations and ensuring accessibility and performance standards are met.

Highest-signal resume keywords

React DevelopmentNext.js (App Router)OpenAPI/TypeScript Client ConsumptionCognito AuthenticationTailwind CSS

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

ReactNext.jsOpenAPITypeScriptSSE (Server-Sent Events)CognitoTailwind CSSCore Web VitalsE2E TestingData Visualization

Soft Skills

CollaborationProblem-SolvingAttention to Detail

Tools & Technologies

PnpmStripe

Industry Keywords

User ExperiencePerformance OptimizationComponent-Driven UIDesign SystemPublic Reference Data

Tech Stack

Tools & technologies

JavaScriptNext.jsReactSwitchingTypeScript

About the role

Key responsibilities & impact

Wire up the BFF client: consume the checked OpenAPI contract via generated clients, and establish stable success/error envelopes, request IDs, idempotency-key and If-Match plumbing, and loading/empty/error/permission state scaffolding.
Build invited sign-in and account context: Cognito sign-in (email/password + Google, PKCE) wired to opaque BFF sessions and protected routes, with explicit account-context switching on staging.
Stand up the guided-exploration entry point: exploration create/run UI wired to the agent and the public corpus, showing the operation lifecycle via resumable SSE on staging.
Conduct a UX & code audit: review for correctness, performance, and consistency; produce a prioritized fix list and a design-system alignment plan.
Invited-account onboarding: invitation acceptance (personal signup / team membership), first workspace creation, first source upload with visible quarantine states (upload_pending → quarantined → processing → available|rejected|processing_failed), and ToS/legal-disclosure acceptance.
Account & membership UX: personal/team accounts, owner/member capabilities via capability policy v1, membership states, and guarded personal↔team conversion flows, with the active account always explicit and never inferred.
Guided exploration experience: the primary entry point over the workspace/exploration/idea/draft model, surfacing exploration lineage (derived_from / incorporates / branches_from / supersedes) and the operation lifecycle (accepted → dispatched → executing → succeeded|failed|cancelled|expired); raw model chain-of-thought is never shown.
Durable-operation progress: fetch-based resumable SSE (auth via header, cookie, or storage; reconnect replays from the last-seen event sequence; respect streams/session and account limits), with cursor-polling fallback and 409 cursor_expired snapshot/resync.
Public graph & analysis views: production-quality visualization and core claims/novelty/cluster views over the public reference plane.
Billing UI (beta): Stripe test-mode plan selection and entitlement display, with no live charging.
Performance & robustness: meet agreed Core Web Vitals budgets; consistent loading/empty/error/permission states; responsive and accessible UI.
Test coverage & handover: component and E2E coverage for critical paths, documented component patterns, and clean handover.

Requirements

What you’ll need

Deep experience with React & Next.js, including Next.js (App Router) as a containerized service, server components, routing, and SSR that calls an internal API rather than data stores directly.
Contract-first client consumption: experience consuming generated OpenAPI/TypeScript clients in a pnpm monorepo, including idempotency keys, ETag/If-Match concurrency, and 202+operation polling, treating the BFF contract as the sole data authority.
Streaming UI experience: building guided/streaming agent interfaces on fetch-based resumable SSE (header auth, reconnect from last-seen sequence, stream limits) with cursor-polling fallback and 409 resync.
Identity-aware UI: experience handling Cognito-backed opaque BFF sessions, protected routes, and explicit account-scoped context on the client.
Data-dense & public-graph UX: experience building dashboards over search, claims/citations, clusters, and validation results, and interactive visualization of large, public reference data sets.
UI & styling: strong Tailwind skills and experience building component-driven UI from a design system and semantic tokens, not ad-hoc styles.
Performance & quality: solid grasp of Core Web Vitals, bundle size, and rendering performance, plus component and E2E testing and accessibility fundamentals.
Availability with meaningful overlap with US and Australian project hours for weekly sync and incident response.

Benefits

Comp & perks

High-impact work at the intersection of AI and critical infrastructure regulation
Direct customer exposure and a seat at the table when we decide what to build
Small team with outsized influence; your field learning shapes the product roadmap
Modern AI-native development environment (Claude Code, Cursor, multi-model orchestration)
Remote-first
Competitive compensation