Level Home

Level Home

Senior Full-Stack WebApp Engineer

Bellevue · Senior

Sponsorship not specifiedDetected 48 days ago
TypeScriptJavaKotlinReactReact NativeBackend DevelopmentFull-Stack DevelopmentCode ReviewPostgreSQLRedisDynamoDBAWSDockerKubernetesTerraformCI/CDGrafanaDatadogAPI DevelopmentRESTgRPCOAuthDesign SystemsAccessibility

About the role

  • Level is a learning technology company dedicated to helping students build real academic and life skills with confidence and joy. We combine proven curriculum principles with world class interactive design to make meaningful practice something students want to come back to, not something they struggle through.
  • We support what teachers, schools, and parents are already doing by increasing student engagement with high quality, standards-aligned practice that reinforces classroom learning.

Responsibilities

  • Own full-stack feature delivery across the web client and its supporting backend services - from UX and component work down through API design, data modeling, and persistence.
  • Design and evolve platform-facing web surfaces - authentication, account capture, invitation and onboarding flows, embedded authoring, and admin tooling consumed by web, mobile, and native clients.
  • Implement clean, readable, testable code on both client and server; take responsibility for features from initial design through release and ongoing maintenance.
  • Architect and implement backend services and APIs (REST and gRPC) that back the web experience and are reused across product surfaces.
  • Make explicit trade-offs on data modeling, contract design, and service boundaries; partner with backend architects on shared libraries and patterns.
  • Define and own reliability targets (SLOs/SLIs) for the services you own; implement structured logging, metrics, and tracing on top of platform standards.
  • Profile, optimize, and tune both client and server for latency, throughput, and cost efficiency - Core Web Vitals on the front-end, p95/p99 on the back-end.
  • Participate in incident response and post-mortems for what you own.
  • Partner with product, design, mobile, and infrastructure engineers to translate product intent into concrete technical designs and ship them iteratively.

Requirements

  • Experience with PostgreSQL and data modeling for product features
  • Strong testing discipline - unit, integration, and end-to-end - and a track record of partnering with QA/DevProd to ship reliably.
  • Need to Have:
  • familiarity with key-value / document stores (DynamoDB, Redis) and with caching, queues, and eventual-consistency trade-offs.
  • Working knowledge of AWS, containers (Docker / Kubernetes), and CI/CD pipelines as a consumer - you don't need to own clusters, but you should be effective in them. Familiarity with Linkerd, ArgoCD, Terraform is a plus.
  • Excellent written and verbal communication
  • ability to lead design discussions, write clear RFCs, and represent technical trade-offs to non-engineering stakeholders.

Nice to have

  • Experience with authentication and identity systems - OAuth/OIDC, SSO, session and token management, third-party providers (Google, Discord, Apple, etc.).
  • Familiarity with OpenTelemetry, structured logging, and modern observability stacks (SigNoz - Level's stack - Grafana, Datadog).
  • Background in EdTech, K-12, or other domains with strong privacy and accessibility requirements (FERPA, COPPA, WCAG).
  • Exposure to Backstage, internal developer platforms, or other developer productivity surfaces.
  • 5+ years of professional full-stack web engineering experience shipping production systems used by real users.
  • Strong proficiency with TypeScript and a modern component framework (React preferred - React Native experience a plus given our direction on client shells)
  • state management, accessible UI patterns, and performance optimization in the browser.
  • Strong backend proficiency in Kotlin or Java on the JVM (Kotlin is Level's primary backend language) or TypeScript for shared platform libraries and tooling

Skills

  • This is an onsite role (5 days per week)

Benefits

  • Ensure high standards of performance, stability, and test coverage across the web surfaces and services you own; partner with our DevProd lead on test strategy, CI/CD, and performance benchmarks.
  • Identify and address technical debt, production issues, and scalability concerns - leave the code better than you found it.
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This listing is sourced directly from Level Home's careers page and normalized into a canonical job model.