Hybrid Backend Software Engineer – Golang, Java

at 1GLOBAL

• Job title: Backend Software Engineer – Golang, Java
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Azure, Cloud, Distributed Systems, Docker, DynamoDB, Google Cloud Platform, Grafana, GRPC, Java, Kafka, Kubernetes, Microservices, MongoDB, Oracle, Postgres, Prometheus, RabbitMQ, Redis, Go
• Location requirements: Hybrid, Sao Paulo, Brazil

About the role

• Backend Software Engineer developing Network API and xSIM Management System at 1GLOBAL. Working in a hybrid environment at a technology-driven global mobile communications provider.

Responsibilities

• Provide accurate effort estimates to support roadmap planning and effective expectation management.
• Design and implement resilient, scalable, secure, and fault-tolerant architectures to ensure system reliability and performance.
• Develop new features and support existing systems across the Network API, xSIM Management System, and Recording Platforms.
• Contribute with small, incremental enhancements that seamlessly integrate into the established codebases.
• Maintain and update existing solutions to keep them modern, efficient, and reliable.
• Collaborate with team members to ensure smooth development processes and shared understanding.
• Write and maintain comprehensive tests to ensure fast regression and reliable validation of new features.
• Implement procedures and metrics to enable effective monitoring and observability of platform contributions.
• Participate in code reviews to promote high standards of code quality, readability, and maintainability.
• Take ownership of the quality and outcomes of your work, ensuring fully functional end-to-end flows.
• Create and maintain accurate, up-to-date technical documentation.
• Actively contribute to team discussions, with a mindset for continuous improvement and openness to new ideas or technologies.

Requirements

• 3+ years of professional experience in backend development, preferably with Go (Golang). Strong Java experience with willing to learn Go is also welcome.
• Strong understanding of concurrency models, with practical experience in implementing asynchronous workflows, inter-process communication, and synchronisation techniques.
• Skilled in designing, building, and consuming RESTful APIs, following best practices for API design and performance optimisation.
• Proven experience working with databases, both relational (e.g., PostgreSQL) and non-relational (e.g., Redis, MongoDB, DynamoDB), including data modelling, query optimisation, and performance tuning.
• Experienced in writing unit tests, integration tests, and benchmarks, with a test-driven development mindset.
• Comfortable with networking protocols and distributed communication patterns (e.g., gRPC, WebSockets, TCP/UDP).
• Experienced in building scalable microservices architectures and distributed systems.
• Knowledgeable in applying software engineering best practices and design patterns for maintainable, testable code.
• Skilled in using DevOps tools and practices, including Docker, CI/CD pipelines, and Infrastructure as Code.
• Familiar with Git workflows and collaborative development processes such as pull requests, code reviews, and agile methodologies.
• Demonstrated accountability for technical outcomes and ownership of end-to-end feature delivery.
• Effective communicator in English, both written and verbal, suitable for a remote and largely asynchronous work environment.
• Proficient in writing idiomatic Go code, with solid understanding of the language’s core features such as interfaces, structs, composition, and error handling.
• Competent in profiling and performance tuning using Go’s built-in tools such as pprof and trace, with a focus on optimisation.
• Demonstrated experience with event-driven architectures, including the implementation of producers and consumers using platforms like Kafka, RabbitMQ, or ActiveMQ.
• Solid hands-on experience deploying, monitoring, and maintaining applications on Kubernetes.
• Working knowledge of cloud platforms (e.g., AWS, GCP, Azure, Oracle Cloud) with experience deploying cloud-native applications.
• Hands-on experience with observability and monitoring tools like Prometheus and Grafana.
• Experience with MSML and SIP is a strong plus

Benefits

• CLT contract — enjoy job stability and reliable benefits that value your work
• Quarterly performance bonuses to reward your hard work and achievements
• Meal allowance paid into Caju card — R$100 per working day
• Health insurance with SulAmérica — 50% covered by the company
• Daycare allowance provided to mothers with children under 3 years old — R$500 per month per child
• Kickstart your journey with an exciting welcome onboarding trip to one of our European offices (Lisbon or Berlin)!