Job Summary: As a Senior Software Engineer, you will join the Safety Engine team to architect security and moderation solutions that protect the journey of millions of users—actively participating in and influencing end-to-end development with a focus on software excellence and scalability. Key Highlights: 1. End-to-end development and influence over solutions. 2. Leadership in technical and business topics. 3. Autonomy and accountability to deliver highly available software. We are a 100% digital company, with technology developed locally and a market leader in online buying and selling. We have become the brand that best represents the circular economy in the country. Today, we operate two offices in Rio de Janeiro and São Paulo. Our flexible work model offers autonomy and freedom, enabling our people to design their own standards and routines with discipline and proactive engagement with business goals, priorities, and company purpose. Building a diverse, inclusive, and equity-focused environment is part of our DNA. We believe diversity, equity, and inclusion are essential to creating a safe environment that delivers innovative and efficient outcomes for our people and society. **Responsibilities and Duties** If you love learning and want to take on this challenge, this opportunity is for you. In this **Senior Software Engineer** role, you’ll join the Safety Engine team, which architects security and moderation solutions protecting the user journey across the OLX ecosystem. **Day-to-day responsibilities include:** * End-to-end development and influence over solutions; * Collaborating with other engineering teams to build and maintain products, keeping our customers at the center; * Prioritizing software excellence by combining your technical knowledge and experience with a proactive mindset; * Demonstrating leadership on technical and business topics; * Exercising autonomy while taking responsibility for delivering software aligned with complex business rules, high availability, meaningful business impact, and readiness to scale for growing numbers of users; * Showing resilience and adaptability to change; * Making technical decisions based on business and engineering metrics; * Sharing knowledge and mentoring others. **Requirements and Qualifications** **What do you need?** * Proficiency in Kotlin and TypeScript. * Experience developing and architecting software on cloud platforms (preferably AWS); * Application of strong software development practices, quality assurance, code standardization, and readability; * Experience building scalable systems—scalable in data, throughput, and complexity; * Experience with testing (unit, integration, end-to-end, UI tests); * Experience with version control (e.g., Git, GitFlow); * Knowledge of observability and monitoring; **Nice-to-have:** * Familiarity with React; * Familiarity with Golang. **Additional Information** **More about OLX Group:** Operating in Brazil since 2010, OLX Group’s purpose is to empower people to achieve their dreams by reinventing consumption models. Following the acquisition of ZAP Group, completed in October 2020, the company operates OLX—a horizontal platform leading in automotive, used consumer goods, and real estate categories—as well as two leading real estate platforms: ZAP and Viva Real. **Benefits:** Market-competitive compensation Health insurance Dental insurance Private pension plan Flexible benefits tailored to your needs Meal allowance Financial counseling Benefits club Remote work allowance Mobility allowance Childcare allowance Life insurance Extended leave policies Sports, wellness, and wellbeing incentives Payroll-deductible loans with reduced interest rates **Apply now and be part of this transformation with us!** We are **OLX Group**, a **100% digital** classifieds marketplace connecting over **7 million people**. A **market leader** in buying and selling vehicles, real estate, and consumer goods, our diversified ecosystem provides an innovative platform for business and conscious consumption. Over **500,000 listings** are published daily, and our platforms (**OLX, VivaReal, and Zap Imóveis**) receive **70 million visits per month**. With technology developed in Brazil, we democratize commerce access for everyone, positively contributing to the economy. Working at OLX means joining a **high-performance culture**, surrounded by the **best talent**. We **think big**, always **look to the future**, and strive to **lead our markets**. Thus, we **build trust** and generate **real impact** for businesses and people’s lives.