Full Stack Engineer

About Brillio

Brillio LLC is a fast-growing, pure-play Digital Transformation Solutions and Services company backed by Bain Capital private equity. Founded in 2014 and headquartered in Silicon Valley, Brillio is focused on delivering design-led solutions for our customers. We are not an IT Services company trying to pivot and support the “next big thing.” As a digitally native company, everything we have done and will continue to do, will have this laser focus. Brillio delivers disruptive digital solutions across capabilities such as Design Thinking, Product Engineering, Data Analytics, Digital Front Office, and Digital Infrastructure. Our core values of Customer success, We Care, Entrepreneurial (mind set) and Excellence - drive everything that we do, from the very first day.

Brillio Romania

Brillio Romania is a dynamic and rapidly growing company with over 200 employees and offices in Cluj, Oradea, and Bucharest. With its fast-paced growth, the company has consistently demonstrated an unwavering commitment to client satisfaction.

At Brillio Romania, we know our success comes from the innovative contributions and brilliant work of our people. So, we make fostering a positive work environment our top priority. Employees at Brillio Romania not only thrive, but they also have the chance to build long and fulfilling careers, fostering a sense of stability and dedication that ultimately benefits both the company and our valued clients.

Role:

Senior Full Stack Engineer

About the Role:

As a Senior Full Stack Engineer, you will contribute to building scalable, high-impact applications used by a global audience. You will work across the entire stack, delivering both frontend and backend solutions while contributing to system design and overall platform quality.

In this role, you’ll collaborate closely with product managers, designers, and engineers to create seamless, user-centric experiences. You’ll take ownership of complex features and contribute to improving system performance, scalability, and maintainability.

Responsibilities:

• Design and develop scalable applications across frontend and backend.
• Build end-to-end features with a focus on performance, reliability, and user experience.
• Develop and maintain secure, high-quality APIs (REST/GraphQL).
• Contribute to system design discussions and technical improvements.
• Support modernization efforts (e.g., reducing technical debt, improving architecture).
• Collaborate with product, design, and engineering teams to deliver features.
• Ensure high-quality, accessible, and performant user interfaces.
• Deploy, monitor, and maintain production systems.
• Write clean, maintainable, and well-tested code.
• Break down tasks and deliver incrementally in an agile environment.

Must-Have Requirements:

• Strong experience with JavaScript / TypeScript and React
• Solid backend development with Kotlin / Java (Spring Boot) / Python
• Experience designing and building REST and/or GraphQL APIs
• Good knowledge of databases: MySQL, DynamoDB, Redis / Elasticache
• Experience with event-driven architecture (e.g., Kafka)
• Familiarity with microservices and distributed systems
• Experience with containerization & orchestration (e.g., Kubernetes)
• Understanding of system design principles (scalability, performance, reliability)
• Knowledge of software architecture patterns (DDD, monolith decomposition)
• Experience with testing practices and writing maintainable code
• Familiarity with monitoring/observability tools (e.g., Datadog)
• Frontend state management and modern UI best practices

Nice to have:

• Experience with Next.js, gRPC/Protobuf
• Experience with observability and monitoring tools (e.g., Datadog)
• Experience building accessible, user-centric interfaces
• Experience working with large-scale, distributed systems
• Experience in payments domain, including payment processor integrations and understanding of payment flows

Soft Skills:

• Strong ownership and accountability for delivered work
• Excellent problem-solving and analytical thinking
• Clear and effective communication within cross-functional teams
• Strong collaboration skills with product, design, and engineering stakeholders
• Ability to break down complex problems into actionable steps
• Proactive attitude and continuous improvement mindset
• Adaptability in a fast-paced, agile environment