Senior Software Engineer (Java, React)

Zartis

Remote

Full Time

Posted December 23, 2025

Not Specified

Remote

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Job Description

A Senior Software Engineer with full-stack expertise is responsible for designing, developing, and maintaining high-performance, scalable software solutions in a fintech environment, collaborating with cross-functional teams, and ensuring quality through automated testing and best practices in an agile, remote setting.

Key Responsibilities

Design, build, and maintain high-performance, reusable, reliable fullstack solutions
Collaborate with Product and cross-functional teams to shape, implement, and deliver technical solutions end-to-end
Work in an Agile environment applying Lean principles, with a focus on CI/CD, automated testing, and continuous delivery
Follow a well-defined delivery lifecycle, adhering to engineering best practices, code quality standards, and development processes
Own technical software design and provide accurate estimates for complex work packages and projects
Partner proactively with customer stakeholders to ensure deliverables meet requirements and expectations
Continuously monitor solution quality and stability, identifying improvement opportunities and proposing constructive changes

Requirements

Minimum 5 years of experience developing applications using Java with SpringBoot.
Extensive hands-on experience with JavaScript, TypeScript, and React.
Expertise in designing software solutions leveraging asynchronous messaging patterns, ensuring decoupled, scalable, and resilient systems.
Solid understanding of Behavior-Driven Development (BDD), Test-Driven Development (TDD), and test automation using tools such as Jasmine, Cypress, or PyTest.
Experience in containers and container orchestration with Kubernetes.
Exposure to or experience working in an event-driven architecture environment.
Knowledge of microservices architectures is a strong advantage.
Excellent written and verbal communication skills, with the ability to present complex technical concepts clearly to a variety of audiences.

Benefits & Perks

100% remote work

Monthly WFH allowance as financial support for remote working

Career development program with 360º feedback

Time allocated during the week for tech training (online courses, English classes, books, conferences, events)

Mentoring program (opportunity to become a mentor or receive mentorship)

Access to Zartis Wellbeing Hub Kara Connect with sessions with mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars

Participation in multicultural work environment with organized tech events, webinars, online team-building games, and contests