Legion is building a regulatory-compliant platform that enables companies to conduct responsible, IPO-style initial coin offerings (ICOs) for retail investors.
<h1> Chief Architect </h1> <h2><strong>Hybrid, Bucharest, Romania</strong></h2> <p><strong>JOB OVERVIEW</strong></p> <p>Legion Technologies is building the AI-powered operating system for the hourly workforce. We are hiring a Chief Architect to serve as Legion’s most senior hands-on technical leader and to shape the technical foundation that will power the next decade of product innovation.<br>This is not a strategy-only or advisory role. The Chief Architect must live close to the code, go deep with engineering teams, challenge assumptions, write and review technical designs, make high-consequence architecture decisions, and help turn bold product ambitions into scalable, reliable production systems.<br>This person will own architecture and technical decision-making for the most complex parts of Legion’s Workforce Management platform, including AI, optimization, forecasting, scheduling, distributed systems, data platforms, real-time decisioning, enterprise scalability, security, compliance, and developer productivity.<br>The ideal candidate has built and scaled mission-critical software used by large enterprise customers, has deep technical credibility with senior engineers, and can operate fluidly between code-level decisions and long-term platform strategy. They are pragmatic, decisive, opinionated, and comfortable making hard tradeoffs when simplicity, scalability, reliability, or customer trust require it.<br>This role reports to the Head of Product, Engineering, and Support. This is an open role currently being filled on an interim basis by the CEO.</p> <p><strong>RESPONSIBILITIES AND DUTIES</strong></p> <h3><strong>Hands-On Architecture and Technical Decision-Making</strong></h3> <ul> <li>Serve as Legion’s senior-most hands-on technical authority for complex architecture, system design, and platform evolution.</li> <li>Personally dive into code, design documents, production incidents, performance bottlenecks, and implementation tradeoffs to diagnose root causes and guide technical direction.</li> <li>Lead the hardest technical decisions across AI systems, optimization engines, distributed systems, data architecture, reliability, scalability, security, and platform modernization.</li> <li>Write prototypes, reference implementations, architecture decision records, technical specifications, and design patterns where needed to unblock teams and establish clear direction.</li> <li>Make high-consequence technical decisions with incomplete information, balancing correctness, simplicity, speed, scalability, reliability, cost, and long-term maintainability.</li> <li>Challenge architectural drift, unnecessary complexity, weak abstractions, and short-term decisions that create long-term platform risk.</li> <li>Partner directly with Staff, Principal, and senior engineering leaders in design reviews, code-level discussions, and implementation planning.</li> </ul> <h3><strong>Platform Architecture and Technical Vision</strong></h3> <ul> <li>Define and own the long-term architecture for Legion’s AI-driven Workforce Management platform across application services, data infrastructure, ML systems, optimization engines, APIs, integration architecture, developer platforms, and enterprise-scale operations.</li> <li>Establish engineering-wide standards for system design, scalability, performance, reliability, extensibility, observability, security, and maintainability.</li> <li>Serve as the final architectural authority for major platform initiatives and technical decisions with long-term consequences.</li> <li>Identify opportunities to reduce complexity, improve system efficiency, accelerate engineering velocity, and unlock new product capabilities.</li> <li>Proactively surface technical debt, architectural risk, and platform constraints before they compound into customer, product, or engineering velocity issues.</li> <li>Create pragmatic migration paths from current-state architecture to target-state architecture while maintaining uptime, customer trust, backward compatibility, and delivery speed.</li> <li>Ensure Legion’s architecture supports enterprise configurability and extensibility without allowing uncontrolled customization or product fragmentation.</li> </ul> <h3><strong>AI, Optimization, and Decision Systems</strong></h3> <ul> <li>Architect AI-native product capabilities across forecasting, scheduling, labor optimization, recommendations, copilots or agents, anomaly detection, decision automation, and other intelligent workforce management use cases.</li> <li>Define the architecture for production AI systems, including data pipelines, feature platforms, model training, model serving, retrieval, evaluation, monitoring, feedback loops, and continuous improvement.</li> <li>Make clear build-versus-buy decisions across LLMs, classical ML, optimization solvers, retrieval systems, evaluation frameworks, and internal AI platforms.</li> <li>Partner closely with Product, Data Science, and Engineering to turn mathematically complex labor optimization problems into reliable, scalable, explainable production systems.</li> <li>Establish standards for AI system quality, including accuracy, latency, cost, explainability, drift detection, reliability, customer-specific behavior, and production observability.</li> <li>Ensure Legion’s AI capabilities remain differentiated, defensible, enterprise-ready, and deeply integrated into operational workflows rather than bolted on as superficial features.</li> </ul> <h3><strong>Distributed Systems, Data, and Enterprise Scale</strong></h3> <ul> <li>Drive architecture for large-scale, multi-tenant SaaS systems serving complex enterprise customers with high availability, performance, security, and compliance expectations.</li> <li>Lead technical decisions involving microservices, APIs, event-driven architecture, distributed data processing, real-time systems, data governance, and large-scale analytics.</li> <li>Improve the architecture for observability, inciden