System Architect

Description Tango is a successful, market leader, a live-streaming Platform with 450+ Million registered users, in an industry projected to reach $240 BILLION in the next couple of years. The B2C platform, based on the best-quality global video technology, allows millions of talented people around the world to create their own live content, engage with their fans, and monetize their talents. Tango live stream was founded in 2018 and is powered by 500+ global employees operating in a culture of growth, learning, and success! The Tango team is a vigorous cocktail of hard workers, creative brains, energizers, geeks, overachievers, athletes, and more. We push the limits to bring our app from “one of the top” to “the leader”. The best way to describe Tango's work style is not to use the word “impossible”. We believe that success is a thorny path that runs on sleepless nights, corporate parties, tough releases, and of course our users' smiles (and as we are a LIVE app, we truly get to see our users all around the world smiling right in front of us in real-time!). Do you want to join the party? Responsibilities Own the backend architecture — service boundaries, data flows, and how services communicate. Set standards for API design, versioning, and integration between our services and external partners. Define backend conventions: project structure, testing, error handling, documentation, and how architecture decisions get made and recorded. Design for throughput, latency, and failure — and fix bottlenecks and single points of failure before they cause incidents. Choose the right storage for each use case, design schemas, and define which service owns which data. Design how LLMs fit into our backend: agent and tool-calling patterns, MCP servers over our internal systems, context handling, evaluation, and fallbacks when the model gets it wrong. Set the standard for AI-assisted development — how the team uses coding agents, what belongs in the repo (context files, custom commands, review workflows), and where the guardrails are. Keep track of architectural risks and technical debt, and turn them into a plan the teams can actually execute. Evaluate frameworks and third-party services, and decide what we adopt. Work with mobile, data, cloud, and product teams so the backend fits what they need. Review designs and mentor engineers. Requirements 8–10+ years in backend engineering, with recent experience in an architect role. Deep hands-on experience with Java and Spring (Spring Boot, Spring Cloud). Strong understanding of microservices and distributed systems, including how they fail. Solid API design experience (REST, gRPC) and event-driven, asynchronous architectures. Hands-on experience with Kafka — topic design, partitioning, consumer groups, delivery guarantees. Experience with SQL and NoSQL databases: data modeling, indexing, query optimization. Practical knowledge of caching (Redis or similar) and tuning systems under load. Understanding of application security — authentication and authorization, secrets management, data protection. Working knowledge of Docker and Kubernetes — enough to design systems that run well on them. Experience with CI/CD, monitoring, and logging. Daily use of AI coding agents (Claude Code, Cursor, Copilot, or similar) — and a clear view of where they help and where they don't. Experience shipping LLM features to production: prompt and context design, tool calling, MCP, streaming, cost and latency control. Good communication skills and English (Intermediate+). Would Be a Plus Experience with high-scale consumer products and real-time systems. Experience breaking up a monolith or running a large migration. JVM performance tuning and profiling. Hands-on experience with an agent framework (LangGraph, LangChain, or similar) — multi-step flows, state, retries, human-in-the-loop. Experience building or operating MCP servers for internal tooling. Familiarity with RAG, vector stores, and embedding-based retrieval. Experience evaluating LLM output — test sets, regression checks, tracing. Experience with mobile–backend integration. What we offer: Stock options grant (we’re a Silicon Valley Company) Competitive salary Medical insurance for you and 75% off for your relatives On-site position with 4 days at the office and 1 day WFH Budget for lunch Parking Multisport card Cheerful team spirit and fun office atmosphere If this sounds like you, apply and help empower live entertainers and creators to build independent businesses around their live talents. #LI-YT1