543
Learners
verifying this skill
1,132
Sessions
completed to date
70
Avg SCI
across all levels
4
Tiers
claimed → peer-endorsed
In a peer session, design schemas, write resolvers, or optim
In a peer session, design schemas, write resolvers, or optimize query performance for a given API problem.
Your partner evaluates your type system usage, subscription
Your partner evaluates your type system usage, subscription handling, batching strategy, and client-side caching considerations.
Rated evidence builds your GraphQL SCI.
Rated evidence builds your GraphQL SCI.
GraphQL — facts worth knowing.
GraphQL was developed internally at Facebook in 2012 and used to power their mobile app rebuild. It was open-sourced in 2015, after Facebook had already shipped it to billions of users.
Did you know?
The DataLoader library, created to solve the N+1 query problem in GraphQL, was so universally needed that it has been reimplemented in virtually every server-side language ecosystem.
Did you know?
GitHub's v4 API is entirely GraphQL – you can fetch a repository's name, star count, and latest commit in a single request. Their v3 REST API would have required three separate requests.
Did you know?
Why GraphQL matters.
GraphQL is a query language and runtime for APIs that gives clients the power to request exactly the data they need. It replaces REST in many modern stacks with typed schemas, subscriptions, and a self-documenting API layer. Lemma sessions test your schema design, resolver implementation, and performance intuition.
GraphQL adoption is growing rapidly in product companies that need flexible, efficient APIs for mobile and web clients. Verified GraphQL proficiency signals you can design schemas that scale, implement resolvers correctly, and avoid the N+1 problem that brings down naive implementations.
543 people are learning this on Lemma
1,132 peer sessions completed
Avg SCI of 70 — tier 3 practitioners
avg SCI on Lemma
GraphQL practitioners
Related skills
GraphQL verification — common questions
In a peer session, you design schemas, write resolvers, or optimize query performance. Your partner evaluates your understanding of type systems, subscriptions, batching, and client-side caching strategies.
Your GraphQL SCI measures competence in schema design, resolver implementation, query optimization (N+1 prevention), authorization patterns, and federation architecture.
Yes. GraphQL skills are increasingly expected in frontend-heavy teams and microservice architectures. Verified GraphQL competence signals flexibility and modern API design understanding – valuable even if your current stack is REST.
Common topics include schema-first vs. code-first design, resolver execution order, DataLoader for batching, subscription implementations with WebSockets or SSE, and federation for combining multiple GraphQL services.
Tutorials teach patterns in isolation through guided examples. Lemma verification proves you can design and implement GraphQL APIs under real constraints with a peer evaluating your schema design and performance decisions.
Start verifying your GraphQL skills.
Join the waitlist. Your first peer session is free.