Are you passionate about building high-performance, user-friendly applications and driving technical vision at scale?We are looking for a Staff Front-End Engineer to join our distributed, innovative engineering team working on a next-generation SaaS video communication platform. This role offers both strategic influence and hands-on impact, combining architecture ownership with direct contribution to product excellence.At Sigma Software, we deliver high-quality solutions for global customers, fostering a culture of collaboration, transparency, and innovation. You will work in a friendly environment with talented engineers across multiple countries, solving complex challenges in high-load, real-time systems.Why join us? You will gain the opportunity to shape architecture decisions, mentor a strong team, and grow in an environment that values technical leadership and continuous improvement.CUSTOMEROur Customer is a fast-growing European SaaS company specializing in browser-based video communication solutions. Their platform enables organizations to host webinars, virtual meetings, product demos, and training sessions entirely in the browser, without downloads or installations. Serving thousands of teams worldwide, the company is recognized for seamless user experiences.PROJECTThe flagship product integrates event management, interactive engagement tools (chat, Q&A, polls), third-party system integrations, and advanced analytics to deliver high-quality virtual events. Built to handle high-traffic, real-time environments, it focuses on performance, scalability, and usability. The engineering team embraces modern JavaScript frameworks and robust architecture practices to continuously evolve the product.RESPONSIBILITIES Own and drive the front-end technical vision and architecture ensuring scalability, performance, and long-term maintainability Define, evolve, and document front-end standards, frameworks, and best practices including design system direction Design and implement scalable front-end solutions leveraging APIs, webhooks, and system integrations Identify, analyze, and resolve performance and scalability bottlenecks in high-load, real-time environments Lead architectural and technical discussions, challenge assumptions, and influence decisions across Engineering, Product, and other stakeholders Collaborate closely with back-end, Product, and Design teams to deliver cohesive, customer-driven solutions Provide technical leadership and mentorship to front-end engineers and other technical team members Support team growth by contributing to technical interviews, candidate evaluation, and profile definition Take ownership in ambiguous or early-stage initiatives driving solutions from concept and prototypes to production REQUIREMENTS Strong expertise in JavaScript and modern front-end development with hands-on experience in Vue.js Proven track record of owning front-end architecture in complex, production-grade applications Strong architectural judgment and ability to predict system behavior at scale Solid background in building high-traffic, real-time, or data-heavy front-end systems Strong technical knowledge of APIs, webhooks, and SaaS integrations Proficiency in web technologies including TypeScript, GraphQL, REST, etc. Deep understanding of performance optimization, scalability, and front-end bottlenecks in production Experience designing or evolving design systems, UI frameworks, and front-end guidelines Experience contributing to or supporting front-end hiring decisions At least an Upper-Intermediate level of English WILL BE A PLUS Proven experience in a Tech Lead and/or Software Architect role Experience with pre-sales engagements and collaboration with account teams Background in a startup or scale-up SaaS environment Familiarity with automation platforms such as Zapier, Make, etc. Experience defining technical guidelines, processes, and internal tooling PERSONAL PROFILE Passion for architecture, scalability, and performance in high-load systems Strong leadership in technical discussions and mentoring Ability to thrive in distributed, collaborative environments Comfortable working with ambiguity and driving initiatives from concept to delivery