Senior Fullstack Engineer

Job Description

About the role MetAntz is hiring for a fast-moving, top tier VC funded Silicon Valley startup currently in stealth mode, started by two industry stalwarts. The company is backed by a?top-tier venture firm?(managing over $40B) with an exceptional track record of making early bets on category-defining companies, including?Palantir?and?ServiceNow. About the Company They are building ambitious products at the intersection of web apps and modern AI systems. They are looking for people who thrive in ambiguity, move quickly, and love building zero-to-one products. We ship fast, cut clean corners, and obsess over reliability, security and craft. You?ll work end-to-end from whiteboard to prod-owning services, shaping architecture, and raising the bar for engineering excellence. You?ll fit right in if you?ve worked in an early-stage company before - or if you?ve always wanted to experience the intensity and freedom of a startup. We value initiative over process, learning over perfection, and collaboration over hierarchy. Things change daily, and that?s part of the fun you?ll wear multiple hats, experiment, and help shape both the product and the culture from the very beginning. What you will do Design & build production services and UIs, from APIs to frontends, with an eye for simplicity, performance, and operability. Own systems instrument, monitor, and debug in prod; drive incident response and post-mortems; automate everything. Evolve our AI stack prototype and productionize features that depend on LLMs?prompt pipelines, evals, guardrails, retrieval, and memory. Tune & measure experiment with model selection, finetuning, quantization, LoRA,PEFT, structured outputs, function, tool calling, and latency, cost tradeoffs. Ship great APIs design pragmatic REST, GraphQL, and/or gRPC interfaces; versioning, pagination, authN,Z, schema evolution, and backward compatibility. Collaborate tightly with product, design to turn ambiguous problems into lovable, secure, and compliant experiences. Mentor teammates via reviews, tech talks, and crisp docs. What makes you a great fit 4-10 years of relevant full stack experience Curiosity as a habit you read release notes, try new runtimes and models, and build weekend prototypes for fun, a lot of your Youtube consumption is hacking and learning new technologies, and you enjoy learning what you don?t know on your own Self-driven you find the problem behind the problem, align stakeholders, and land outcomes without hand-holding. Systems mindset you think in SLOs, budgets (latency, cost, error), blast radius, and graceful degradation. API ergonomics you care about naming, error design, rate limits, observability, generated SDKs, and docs that don?t lie. Data foundations you know when to pick Postgres vs columnar vs KV vs vector; you have shipped schema migrations and zero-downtime deploys. LLM-practical you have built RAG or agents in anger; you understand context windows, tokenization, evals, and prompt, tooling hygiene. Security instincts you default to least privilege, tame secrets, and design auth flows that survive real traffic. Nice to have Hands-on with vector DBs (e.g., FAISS, HNSW, Milvus, PGVector), embeddings pipelines, and hybrid ranking. Can Design retrieval layers build embeddings pipelines, vector indexes, hybrid search (BM25 + ANN), chunking,merging strategies, and memory graphs. Protocol-fluent you actually enjoy HTTP,1.1 vs HTTP,2,3 quirks, caching semantics, content negotiation, and idempotency. Experience with model hosting (self-hosted inference servers, serverless GPUs, or managed endpoints) and caching, streaming strategies. Infra chops containers, IaC, CI,CD, service meshes, feature flags, canary, blue-green, cost observability. Frontend XP with modern TypeScript frameworks and component systems; accessibility and performance budgets. Prior startup experience or meaningful open-source contributions. Knowledge of Golang Compensation & location Competitive salary + equity; Development team based in Chennai, collaborating with some team members in San Francisco. If this sounds like you, show us, don?t just tell us share a system you have built, the toughest incident you have owned, or a small repo that captures your taste, and/or the last two-three things you built and taught yourself. **This is urgent requirement and early joiners will be preferred**