As a Senior Full Stack Engineer at Voltchat, you'll be responsible for architecting and scaling backend services for our WhatsApp messaging client. Your role will include optimizing systems for speed and efficiency, working on real-time data processes, and collaborating closely with frontend developers to ensure a seamless user experience.

To apply for the Senior Full Stack Engineer at Voltchat, one should have over 5 years of experience in JavaScript or TypeScript development, with deep expertise in Node.js, real-time messaging systems, and API design. Familiarity with both SQL and NoSQL databases is also essential, along with strong problem-solving skills.

Voltchat offers a hybrid work model for the Senior Full Stack Engineer position, allowing you to work 3 days on-site in Vicente López and 2 days remotely each week, providing both collaboration opportunities and flexibility to accommodate your lifestyle.

At Voltchat, you'll be part of a small, agile team that thrives on collaboration and innovation. The environment is fast-paced and focused on problem-solving, with minimal corporate bureaucracy, so you can truly focus on building impressive solutions that matter.

While the core qualifications are essential, candidates with experience in WhatsApp Web reverse engineering, low-level networking, or desktop application development will have a competitive edge in the selection process for the Senior Full Stack Engineer role at Voltchat.

In your response, discuss your specific projects involving Node.js, focusing on real-time communication, such as utilizing WebSockets. Sharing your understanding of the challenges you faced and how you overcame them will showcase your problem-solving skills effectively.

Discuss techniques you've employed to analyze slow performance issues, such as profiling tools and monitoring scripts. Sharing specific examples where you successfully optimized an application, along with metrics demonstrating improvement, will strengthen your response.

Emphasize the importance of clean, well-documented APIs in ensuring seamless communication between frontend and backend systems. Discuss your experience in designing APIs and how it impacts user experience and maintainability of the application.

Select a specific situation, detailing the problem, your analysis process, the solution you implemented, and the positive outcome. This will illustrate your problem-solving skills and ability to work under pressure.

Highlight your communication strategies and tools you use to facilitate collaboration. Discuss any frameworks or coding standards you to follow to maintain coherence between frontend and backend teams.

Reflect on a key technical choice you made, whether in architecture, technology stack, or tool selection, explaining your rationale and how it influenced the project's trajectory positively.

Explain your debugging process, referring to any specific tools or methods you prefer. Illustrating your systematic approach will demonstrate your analytical mindset to the interviewers.

Share your methods for staying informed, such as following tech blogs, participating in webinars, or joining developer communities. This shows your commitment to continuous learning and improvement in your field.

Detail your experience with SQL and NoSQL databases in your projects, discussing how you manage schema design and data migration, which is crucial in maintaining a robust application performance.

Express your enthusiasm for Voltchat's mission and innovative approach, connecting it to your values as a developer. Mention specific aspects of the company culture that resonate with you while highlighting how your skills align with their goals.