Senior Fullstack Engineer (Java / React)

Zartis is a global AI transformation and technology consulting partner where talented engineers and technologists work on cutting edge innovation. We partner with ambitious organizations to design, build, and scale technology solutions that deliver real impact.

Our teams bring deep expertise in AI driven platforms, secure API architectures, and cloud native engineering. You will work on meaningful projects that accelerate the adoption of advanced technologies, from strategy and discovery through to full product delivery, helping turn complex challenges into measurable outcomes.

With engineering hubs across EMEA and LATAM, and long term partnerships in financial services, healthcare and life sciences, and energy and climate, we offer opportunities to work on projects that truly matter. Here, you will not just build technology, you will drive business impact and grow your career alongside industry leaders.

We are looking for a Senior Software Engineer to work on a project in the financial services / banking sector.

Our teammates are talented people that come from a variety of backgrounds. We’re committed to building an inclusive culture based on trust and innovation.

Our teammates are talented people who come from a variety of backgrounds. We’re

committed to building an inclusive culture based on trust and innovation.

You will be embedded within the engineering team of an FCA/PRA-authorised specialist bank in the UK, working across digital banking products that span Java/Spring Boot microservices, TypeScript/React frontends, and integrations with third-party financial systems. The specific platform and stream will be confirmed at the point of placement.

The team is small (~11–12 engineers), close-knit, and genuinely curious — actively experimenting with AI-assisted development. Many engineers have grown up inside this organisation, so someone with broader industry exposure will stand out, have real influence, and help shape the way the team evolves. You will own features end-to-end, contribute to cloud-native infrastructure on AWS, and work alongside product and QA in a flat, delivery-focused environment.

We are looking for someone with good communication skills, ideally with experience making decisions independently, being proactive, used to building and evolving production software, and with good attention to detail.

We are looking for someone with good communication skills, ideally with experience making decisions, being proactive, used to building software from scratch, and with good attention to detail. 

• • Design and deliver full-stack features across Java Spring Boot APIs and TypeScript/React frontends.

  • Contribute to the EKS/Kubernetes migration and ongoing cloud-native evolution on AWS.

  • Write clean, well-tested code with SonarCloud quality gates, Trivy security scans, and GitHub Actions CI/CD pipelines.

  • Work with AWS RDS Aurora (MySQL) and DynamoDB for relational and document storage patterns.

  • Integrate with third-party platforms (core banking systems, CRM) where relevant to your stream.

  • Participate in code review, technical design discussions, and architectural decision-making.

  • Mentor colleagues and share patterns and practices from broader industry experience.

  • Bring enthusiasm for AI-augmented development — the team actively experiments and values engineers who do the same.

• • 7+ years of professional software development experience.

  • Strong proficiency in Java and Spring Boot.

  • Solid TypeScript and React experience for building complex, data-driven UIs.

  • Sound understanding of REST API design (OpenAPI/Swagger), microservices, and distributed systems.

  • Hands-on experience with AWS (EC2, RDS Aurora, DynamoDB, EKS or comparable Kubernetes environments).

  • Familiarity with CI/CD pipelines using GitHub Actions or Jenkins, Docker, and container security tooling.

  • Ability to work autonomously in a small, cross-functional team with genuine ownership of outcomes.

• • Experience in a regulated financial services environment (FCA/PRA, PCI-DSS, or similar).

  • Familiarity with core banking platforms such as Mambu, or CRM integrations with Dynamics 365.

  • Experience with SonarCloud, SAST/DAST tooling, or security-focused development practices.

  • Background across multiple companies or product teams — breadth of perspective is genuinely valued here.

  • Active interest in or practical use of AI-augmented development tools (Copilot, Claude, Cursor, etc.).

• • 100% Remote Work

  • WFH allowance: Monthly payment as financial support for remote working.

  • Career Growth: We have established a career development program accessible for all employees with a 360º feedback that will help us to guide you in your career progression.

  • Training: For Tech training at Zartis, you have time allocated during the week at your disposal. You can request from a variety of options, such as online courses (from Pluralsight and Educative.io, for example), English classes, books, conferences, and events.

  • Mentoring Program: You can become a mentor in Zartis or you can receive mentorship, or both.

  • Zartis Wellbeing Hub (Kara Connect): A platform that provides sessions with a range of specialists, including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars with such professionals as well.

  • Multicultural working environment: We organize tech events, webinars, parties, and activities to do online team-building games and contests.