Core Experience Engineer - Team Lead

​​🌎 Onsite — Caxias do Sul, Brazil

💰 $80,000 USD + Equity & Benefits

About TestBox

TestBox was founded with a bold mission: to fundamentally transform how software is bought and sold. We’re building an innovative platform that empowers buyers with transparent, interactive software experiences, while equipping sellers with powerful tools to deliver exceptional buying and onboarding journeys. Our core technologies - synthetic data, intelligent orchestration, and our unique product graph - help teams achieve faster implementations, clearer insights, and increase trust with their customers.

At TestBox, we're not just improving demos; we're building the next generation infrastructure for software transactions, creating seamless experiences from initial interest to successful onboarding and beyond.

We're a fast-growing startup built by a team that values experimentation, velocity, and customer impact. We’re backed by world-class investors and are building a platform that’s disrupting the traditional B2B sales motion.

Role Overview

As the Engineering Lead for the Core Experience team, you'll guide our core engineering team in building the foundation of our produc. You'll act as a technical leader, coach, and hands-on contributor, helping shape what we build and how we build it. You’ll collaborate closely with Product, Design, and company leadership to define, scope, and deliver impactful features that improve the buyer experience and drive TestBox’s mission forward.

You’ll bring a deep understanding of our core systems, a passion for mentorship, and a bias for action. Whether you're helping an engineer unblock a problem, leading a grooming session, or jumping into the code to push a key feature over the line, you’ll be a multiplier for the entire team.

What You'll Do

Team Leadership & Enablement

• Lead and support a small but mighty core engineering team
• Mentor engineers through pairing, thoughtful feedback, and day-to-day guidance
• Create a strong culture of ownership, attention to detail, and continuous learning
• Provide clarity and coaching when team members are stuck or uncertain

Technical Execution

• Get hands-on with the codebase — guiding architecture, reviewing PRs, and contributing directly to key systems
• Own the technical vision for our core systems and ensure implementation quality meets our standards
• Drive a high bar for development, ensuring low rework and high maintainability
  
  

Cross-Functional Collaboration

• Partner with Product, Design, and company leadership to prioritize and scope roadmap initiatives
• Participate in high-level planning, bringing technical insight to product discussions
• Lead technical grooming, and shape proposals for new features, capabilities, and tools
  
  

Innovation & Strategy

• Identify and introduce new technologies, patterns, and practices to elevate our platform
• Represent the technical voice in strategic conversations around TestBox's direction
• Help define and refine our development processes as we scale
  
  

Preferred Experience

• 6–8 years of experience in software development, ideally across full-stack systems
• 2–3 years of experience as a Tech Lead in a B2B SaaS company or hyper-growth startup
• Strong ability to navigate ambiguity and bring clarity where it's lacking
• Comfortable rolling up your sleeves to ship features and fix bugs alongside your team
• Experience mentoring engineers and fostering growth through collaboration and coaching
• Familiarity with agile methodologies and fast-paced product development environments
• Comfortable with AWS products

Why Join TestBox

• Build foundational, greenfield systems from the ground up and make a massive impact from day one.
• Solve challenging and rewarding UI/UX problems for a technical user base.
• Define the frontend architecture and best practices that will shape the company's product for years to come.
• Join a company obsessed with customer experience, speed, and scale.

Benefits

• Generous equity package for meaningful ownership.
• Prioritization of your professional growth, with dedicated career development support.
• Flexible, unlimited PTO with a minimum expectation for recharge.
• Mental Health benefits.
• Fitness allowances.
• Learning allowances.
• Remote and office setup allowances to ensure productive and comfortable working environments.