Mid/Senior Java Developer, Brazil

CI&T; Brazil; On-site; BRL 180,000 - 300,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Meal allowance

Paternity leave

Gym membership

Profit sharing

Life insurance

CI&T University

Discount club

Well-being platform

Parenting course

Online learning

Language platform

Job summary

CI&T is seeking hands-on backend engineers to own forked Java/Spring Boot services powering a direct-to-consumer platform. You will stabilize critical flows, document tri-layer context, and collaborate with a global team to ensure reliability in production environments.

Experience in distributed microservices, REST APIs, and Azure DevOps is required. English communication is essential for cross-team collaboration.

Qualifications

• Hands-on AI-assisted development tools in real work.
• Java backend production experience required.
• Spring Boot core framework across the service landscape.
• REST API design and integration.
• Azure DevOps pipelines, repos and environments.
• CosmosDB and PostgreSQL databases.
• JUnit testing; E2E/integration testing.
• Incident response mindset in distributed systems.
• English reading and written communication.
• Inherit and debug distributed microservices in production.
• Clear, proactive communication; document knowledge.
• Work with inherited/legacy code mindset.

Responsibilities

• Own forked backend services (Java/Spring Boot).
• Shadow the original team to map dependencies.
• Build service context documentation in three layers.
• Support 24/7 production incidents.
• Contribute to CI/CD pipelines and Azure DevOps.
• Adopt GitFlow and improve test coverage.
• Identify systemic risks in services.

Skills

Java

Spring Boot

REST API

Azure DevOps

Distributed microservices

English proficiency

Tools

CosmosDB

PostgreSQL

Job description

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions.

With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.

We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

We're assembling a small team to take over a set of backend services that power a direct-to-consumer commerce platform of a global beverage/consumer goods company. The platform is being separated from the B2B ecosystem it was born in. As part of that separation, a group of critical services (orders, pricing, payments, and promotions/combos) is being forked as-is into the new environment, and they need a team that owns them.

The mission for this phase is clear: keep the lights on. Absorb these services fast, keep them stable through the highest-demand period of the year, and leave them better documented and tested than we found them. The client's architecture team is designing the target architecture in parallel. That work is not in this team's scope today, but it is the natural next step.

This is not greenfield. You'll inherit real services with real history, learn them from the people who built them.

What You'll Be Doing

Own a portfolio of forked backend services (mostly Java/Spring Boot): bug fixes, small changes, and day-to-day stability.

Drive knowledge transfer with the original team through shadowing sessions. Ask the right questions, map dependencies, and turn tacit knowledge into something written.

Build service context documentation in three layers (business rules, application behavior, operations) following the client's template. This feeds both the human team and the AI-assisted development model the client already runs in production.

Support incidents in a production environment that runs 24/7 across global markets, including critical flows like orders and payments.

Work within an Azure-based infrastructure (Azure DevOps, pipelines, and subscriptions), contributing to the duplication and adaptation of CI/CD pipelines for the new environment

Participate in the team's shift toward better engineering practices: adopting GitFlow, strengthening test coverage, and gradually incorporating quality gates — without breaking what already works

Help classify services by technical criticality and flag systemic risks early, such as hidden dependencies, shared databases/queues, and fragile integrations.

Requirements (Must Have):

Hands-on use of AI-assisted development tools (coding agents, assistants) in real work, with judgment about when to trust and when to verify.

Java (backend, production experience) — this is non-negotiable

Spring Boot — the core framework across the service landscape

REST API design and integration

Azure DevOps — familiarity with pipelines, repos, and environments

Non relational (CosmosDB for MongoDB) and relational databases (PostgreSQL)

Testing — JUnit for unit tests; familiarity with E2E or integration testing

Incident response mindset — ability to diagnose, triage, and resolve issues in complex distributed systems under pressure

English — for reading documentation, participating in cross-team calls, and written communication

Hands-on experience operating and debugging distributed microservices in production: logs, tracing, triage under pressure.

Clear, proactive communication. You'll extract knowledge from a team that is moving on, so you must be able to drive conversations, write things down, and elevate early.

Comfort working on inherited/legacy code with a "understand first, change carefully" mindset.

Nice to Have Skills:

Experience with microservices at scale — especially the operational realities of running and debugging many services in production

Azure cloud services beyond DevOps (Service Bus, Blob Storage, Functions, etc.)

Familiarity with DDD (Domain-Driven Design) concepts and service boundary thinking

Go — a secondary language used in some newer services

Understanding of internationalization and global commerce (multi-currency, multi-region systems)

Performance optimization experience in high-throughput environments

What Makes This Role Different:

You'll be joining at a moment that requires adaptability over idealism — the goal isn't to redesign what's working, it's to understand it deeply, keep it running, and incrementally move it toward a cleaner state. The team values engineers who can hold two things at once: operational discipline today and architectural vision for tomorrow.

If you've ever had to inherit complex legacy systems, win trust through reliability, and earn the space to improve things over time — this will feel familiar in the best way.

Seniority Levels:

We're open to Mid-Level and Senior profiles. Both levels are hands-on: everyone on this team writes code, fixes bugs, and takes on-call shifts. The difference is scope and autonomy.

Mid-Level: Delivers fixes and changes independently on well-understood services, with guidance on the more complex ones. Strong Java/Spring Boot fundamentals and solid microservices concepts. Takes part in incident response alongside senior engineers. Learns a complex domain fast through shadowing and documentation, and writes down what they learn.

• -Health and dental insurance
• -Meal and food allowance
• -Extended paternity leave
• -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass;
• -Profit Sharing and Results Participation (PLR);
• -Life insurance
• -Continuous learning platform (CI&T University);
• -Discount club
• -Free online platform dedicated to physical, mental, and overall well-being
• -Pregnancy and responsible parenting course
• -Partnerships with online learning platforms
• -Language learning platform

And many more!

More details about our benefits here: https://ciandt.com/br/pt-br/carreiras

At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here. This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it.

We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.