Mid-level Kotlin/Java Developer

Remote; San Francisco (CA); Remote; USD 22,000 - 33,000; Full time

Benefits offered by this job

Health benefits

Remote work

Continuous learning opportunities

Competitive compensation

Job summary

This position is a partner-backed role focused on backend development using Kotlin and Java. The developer will design, build, and maintain backend services for digital products with a focus on scalable microservices and reliable data handling.

Remote-first environment in Brazil; you’ll apply TDD, DDD, Clean Code, and Hexagonal Architecture, while collaborating with client stakeholders to ensure performance, observability, and high-quality delivery.

Qualifications

• Backend experience with Java and Kotlin.
• Knowledge of SQL/NoSQL databases incl. PostgreSQL.
• Familiarity with microservices and REST APIs.
• Experience with TDD, clean code, and hexagonal architecture.
• Remote-friendly with strong collaboration skills.

Responsibilities

• Design, develop, and maintain backend services with Kotlin/Java.
• Build scalable microservices using established patterns.
• Write unit, functional, and performance tests.
• Instrument apps with logs and metrics for observability.
• Collaborate with clients and teams to deliver objectives.
• Follow client policies, security standards, and processes.

Skills

Kotlin

Java

Backend development

TDD/DDD/Hexagonal

REST APIs

Tools

PostgreSQL

Swagger

Git

Grafana

JUnit

Docker

Kubernetes

Job description

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Mid-level Kotlin/Java Developer based in Brazil.

In this role, you will develop and maintain backend services for digital products supporting one of Brazil’s largest banking institutions. You will contribute throughout the entire product lifecycle, from designing and implementing new features to testing, production deployment, ongoing support, and continuous improvement. Working with Kotlin, Java, and modern software architecture practices, you will help build scalable, reliable, and maintainable microservices. You will collaborate closely with multidisciplinary teams and client stakeholders to resolve technical challenges and deliver high-quality solutions. Your work will also contribute to application performance, observability, and system reliability through effective testing, monitoring, and metrics. This is an opportunity to strengthen your engineering expertise in a collaborative, remote-first environment focused on modern technologies, technical excellence, and continuous learning.

Accountabilities:

• Design, develop, and maintain backend services using Kotlin, Java, and object-oriented programming principles, contributing to the full software development lifecycle.

• Participate in feature conception, technical design, implementation, testing, production deployment, application support, and continuous improvement.

• Build and maintain scalable, reliable microservices using established architectural patterns and software engineering best practices.

• Apply Test-Driven Development (TDD), Domain-Driven Design (DDD), Clean Code principles, and Hexagonal Architecture to improve code quality and maintainability.

• Work with SQL and NoSQL databases, including PostgreSQL, to support reliable data storage, retrieval, and processing.

• Develop and maintain APIs and backend integrations using HTTP/HTTPS protocols, Swagger documentation, and established development standards.

• Write and maintain unit, functional, and performance tests in accordance with team guidelines and quality expectations.

• Investigate and resolve bugs, production incidents, and technical issues within appropriate timeframes, identifying root causes and proposing lasting improvements.

• Instrument applications to collect performance data, logs, and metrics, using tools such as SonarQube and Grafana to support observability and reliability.

• Collaborate with developers, other technical specialists, and client stakeholders to align priorities, solve problems, and deliver product objectives.

• Follow established client policies, technical standards, security requirements, and development processes.

• Contribute to code reviews, technical discussions, and continuous improvement initiatives that enhance engineering practices and delivery quality.

Requirements:

• Professional experience in backend software development using object-oriented programming languages, particularly Java and Kotlin.

• Familiarity with JavaScript for Backend-for-Frontend (BFF) development.

• Solid understanding of microservices architecture and the principles of building scalable, maintainable backend applications.

• Knowledge of software engineering best practices, including TDD, DDD, Clean Code, and Hexagonal Architecture.

• Experience working with SQL and NoSQL databases, including PostgreSQL.

• Understanding of HTTP/HTTPS protocols and API development and integration.

• Experience using Git for version control, Git Flow for branching strategies, and Swagger for API documentation.

• Ability to write and maintain unit, functional, and performance tests in line with established quality standards.

• Familiarity with application monitoring, performance instrumentation, logs, and metrics, including tools such as SonarQube and Grafana.

• Strong analytical and troubleshooting skills, with the ability to investigate defects, resolve incidents, and recommend effective technical improvements.

• Good communication and collaboration skills, with the ability to work closely with teammates and client stakeholders.

• Proactivity, accountability, attention to quality, and a commitment to following defined policies and processes.

• A continuous learning mindset and the ability to adapt to evolving technical requirements and development practices.

Nice to have:

• Experience with Spring Boot and/or Javalin.

• Familiarity with NoSQL database technologies.

• Knowledge of Docker and Kubernetes for containerization and orchestration.

• Exposure to Apigee Hybrid, Google Cloud Platform, Node.js, and AWS.

• Experience supporting production systems and improving application reliability in enterprise environments.

Benefits:

• Health insurance: Medical coverage to support your health and well-being.

• Dental insurance: Access to dental care and related services.

• Meal and food allowances: Benefits to help cover daily meals and grocery expenses.

• Childcare assistance: Financial support for eligible childcare expenses.

• Extended parental leave: Additional time and support for employees welcoming a child.

• Wellness benefits: Access to fitness facilities and health and wellness professionals through partner platforms, including Wellhub and TotalPass.

• Profit-sharing program (PLR): Participation in a profit-sharing and results program, subject to applicable terms.

• Life insurance: Additional financial protection for employees and their beneficiaries.

• Continuous learning: Access to professional development resources and an internal learning platform.

• Online learning opportunities: Partnerships with online course providers to support ongoing technical development.

• Language learning: Access to language-learning platforms to help strengthen communication skills.

• Discount club: Access to discounts and special offers through partner programs.

• Physical and mental well-being: Access to an online platform focused on physical health, mental health, and overall wellness.

• Parental support: Educational resources covering pregnancy and responsible parenting.

• Inclusive workplace: Dedicated support for professionals with disabilities, including assistance with accommodations throughout the recruitment process.

• Remote work: A remote working arrangement, with office attendance required for professionals residing in the Campinas metropolitan area in accordance with the applicable attendance policy.