Member of Technical Staff (MTS) – Core Full-Stack / Backend

About Us We are an AI-first engineering intelligence platform building the future of developer workflows completely from scratch. We are the core engineering team behind Fi, where we built and scaled fintech systems for over 3 million users. We don’t stitch together basic API wrappers; we work directly on deep system architectures. If you want a highly challenging, completely flat environment where you own your vertical without bureaucratic red tape, this is it. The Role & Technical Depth We are shifting past static components into high-concurrency, data-heavy production web flows and fully autonomous AI agent systems. We need a stellar engineer who can write high-performance backends and wrap deterministic, bulletproof software around non-deterministic AI outputs. Build the Stack: Design, develop, and optimize core services, heavy web architectures, and transaction flows for our platform. Production-Grade AI Agents: Take AI loops out of the "toy project" phase and build the software loops, validation guardrails, and caching mechanisms required to run them reliably at scale. Performance Engineering: Diagnose and resolve complex backend bottlenecks, database deadlocks, and high-concurrency latency spikes. Our Expected Stack:Go (Golang) or high-performance backend equivalents, relational/non-relational databases, Redis cache/queuing systems, and modern, highly optimized web engineering frameworks. Who You Are Experience:3–4 years of intensive full-stack or backend engineering experience. Startup DNA: Proven track record in high-velocity tech startups with heavy execution demands. You excel in ambiguous environments where the destination is clear but the map is yet to be drawn. Strong Fundamentals: You know how to build software that scales. You understand memory management, concurrency primitives, asynchronous task processing, and how web protocols actually break under load. Selection Process : Once you apply via the career page, we will reach out to set up a first round of technical interview, followed by 2/3 rounds of interviews with leadership & key stakeholders. You might be required to attempt a take home technical assignment/excercise which typically takes 3-4 days. In addition to assessing your technical/coding experience, expect at least 2 rounds to assess your communication & articulation ability, general aptitude, attitude and cultural fitment. We aspire to create an inclusive culture of diverse people not just because it's the right thing to do but because heterogeneity inspires us and is more fun! We employ people solely on merit and do not discriminate against any employee or applicant because of race, creed, color, religion, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, marital status, pregnancy or related condition (including breastfeeding), or any other basis protected by law.