Core Experience Engineer – Team Lead

**About the Role** We are looking for a Core Experience Engineering Lead to guide a small, high\-impact engineering team at TestBox. You will act as both a technical leader and hands\-on contributor, ensuring our core systems are scalable, maintainable, and aligned with company goals. This role combines team leadership, architectural ownership, and cross\-functional collaboration with Product and Design. **In the first 3–6 months, success means:** * Building trust and rapport with your team through effective 1:1s and mentorship * Taking ownership of core systems and contributing directly to feature delivery * Raising the bar on code quality, architecture, and engineering practices * Partnering with leadership to scope and prioritize impactful initiatives **Key Responsibilities** * Lead and mentor engineers, fostering a culture of ownership and learning * Provide hands\-on guidance through code reviews, architecture decisions, and problem\-solving * Own the technical vision for core systems, ensuring scalability and performance * Drive database strategy and architecture for reliability and growth * Collaborate with Product and Design to define and deliver roadmap initiatives * Introduce new technologies, practices, and patterns to improve the platform * Represent the engineering perspective in strategic company discussions **Requirements** * 6–8 years of software development experience, ideally in full\-stack systems * 2–3 years as a Tech Lead in a B2B SaaS company or fast\-scaling startup * Strong coding background, with 1–2 years of experience in Python and React * Proven ability to mentor and support engineers’ professional growth * Experience designing scalable database architectures * Familiarity with agile methodologies and product\-driven development * Comfortable with AWS products * Advanced English (C1 or C2\), both written and spoken **Preferred Qualifications** * Experience navigating ambiguity in early\-stage or high\-growth environments * Track record of shaping frontend or full\-stack architecture at scale * Background in driving UI/UX improvements for technical products **Compensation \& Logistics** * Salary: $80,000 USD \+ Equity \& Benefits * 2,000 USD relocation bonus * Location: Caxias do Sul, Brazil * Flexible schedule with overlap required for team collaboration * Additional perks include flexible PTO, professional development support, wellness allowances, and remote setup stipends **Company Overview** TestBox is transforming how software is bought and sold. Their platform enables buyers to experience software interactively while giving sellers the tools to deliver seamless demos and onboarding. Backed by top investors, building the next\-generation infrastructure for B2B software transactions. Their technologies, synthetic data, intelligent orchestration, and our product graph, help teams accelerate implementations and build trust with their customers. **Note:** After applying, you will receive an **automated phone call from our AI Assistant** at the phone number you provided. This is a **short interview (5–15 minutes)** to help us get to know you better and speed up the hiring process. Please make sure your number is correct and be ready to answer the call.