Job Title: Senior Backend Software Engineer (Java/Kotlin)
Location: Brazil, Costa Rica, Colombia
Work Mode: 100% Remote
Employment Type: Independent Contractor (Hourly, no benefits, candidate responsible for taxes)
Contract Duration: 6 Months (with possibility of extension)
Working Hours: 40 hours per week
Role Overview
* Senior Software Engineer on a newly formed Item Domain team (Sales & Retail: Pricing, Pay, and Merch Tools) for an authenticated luxury resale marketplace.
* Focus on rebuilding core item data systems (pricing, merchandising, enrichment) through a mix of greenfield development and legacy system integration.
* This is a high-impact role contributing to a long-term transformation of core data systems, leveraging modern backend technologies and AI-assisted development.
* Collaborate closely with product, design, and engineering leadership in a fast-moving, cross-functional environment.
Key Responsibilities
* Produce high-quality, performant, and testable code contributing to company-wide initiatives.
* Develop backend services and internal tooling using JVM (Java, Kotlin) as a core focus, along with existing systems in Python and Ruby.
* Build and support web applications for shoppers and operators (listing, enrichment, merchandising).
* Work with technologies including React, TypeScript, GraphQL, Kafka, AWS/Lambda, PostgreSQL, DynamoDB.
* Contribute to technical decisions shaping future software systems and architecture.
* Review pull requests and provide constructive feedback to peers.
* Collaborate through pair programming and support onboarding when needed.
* Deploy user-facing code to production responsibly.
* Partner closely with product managers, engineering leadership, and stakeholders across regions.
* Ensure observability and reliability by learning from metrics and incidents and maintaining systems.
* Leverage AI-assisted development tools to improve productivity and engineering workflows.
* Continuously learn and apply new technologies, patterns, and initiatives.
Required Qualifications
* Bachelor’s degree in Computer Science or equivalent experience.
* 3–5+ years of strong backend software engineering experience.
* Experience with Java or another backend language, with willingness to work with Kotlin (JVM-based systems).
* Experience building and maintaining production-ready, reliable, and secure systems.
* Understanding of APIs, distributed systems, and event-driven architectures (e.g., Kafka).
* Strong communication skills with product, stakeholders, and engineering peers ( fluent English required ).
* Comfortable working cross-functionally with distributed and US-based teams.
* Familiarity with RESTful APIs, Git, TypeScript, version control, and deployment tools.
* Strong problem-solving mindset with focus on user impact and business context.
* Openness to using AI-assisted coding tools in daily development workflows.
Preferred Qualifications
* Experience with JVM services (Java, Kotlin) in production environments.
* Experience with Python or Ruby.
* Experience with web technologies: JavaScript, TypeScript, HTML, CSS, React.
* Experience building microservices and working across distributed systems.
* Experience integrating LLMs or managed AI APIs into backend or internal tools.
* Experience with eCommerce platforms.
* Experience working with CMS tools (especially Prismic).
* Experience with monitoring, dashboards, and incident response in production.
What We’re Looking For
* Backend-strong engineer (full-stack experience is a plus).
* Adaptable and fast learner with flexibility across technologies.
* Comfortable working in ambiguous, fast-moving, and greenfield environments .
* Strong ownership mindset and ability to work independently.
* Excellent communicator and collaborative team player.
* Open to AI-assisted development workflows and modern engineering practices.