Senior Software Engineer - Java, React (All Genders)

SA Cosmos; Germany (OH); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

20 days abroad in approved countries

Subsidised transport or bike leasing

Career development opportunities

Job summary

SA Cosmos is seeking a Senior Software Engineer proficient in Java, React, and modern applications to join our innovative Payments Team. You’ll build scalable payment solutions, collaborating in an agile environment with a focus on performance and reliability.

This role not only involves coding but also participating in architectural decisions and improving overall developer experience. We offer a hybrid work model and various perks, including career development opportunities and benefits.

Qualifications

• Experience building modern software applications at scale.
• Good knowledge of Java and Spring-based development.
• Experience with frontend technologies such as React and TypeScript.

Responsibilities

• Build and evolve scalable payment solutions within a microservices environment.
• Take ownership of features from idea to production.
• Contribute to architecture and technical decision-making.

Skills

Java and Spring-based development

React and TypeScript

Cloud platforms and CI/CD

Microservices architecture

Observability and monitoring tools

Tools

Docker

Kubernetes

Terraform

PostgreSQL

Oracle

Job description

Senior Software Engineer - Java, React (All Genders)

Competitive

Company Description: With over 25 years’ experience, we’re trailblazers in the pet e‑commerce industry. Our solutions make over 12 million customers genuinely happier. We work together to continually adapt, embracing change to keep doing better. Join us and discover a place where your potential meets your passion for pets.

Job Description

Join our Payments Team and help shape secure, scalable payment experiences used by millions of customers every day. This high‑impact engineering role is at the centre of the customer journey, where performance, reliability, and user experience truly matter.

We’re looking for an experienced engineer who enjoys solving complex problems, collaborating across teams, and building modern applications at scale. While this is a full‑stack role, we welcome candidates with either stronger backend or frontend experience who are excited to work across the stack.

What You’ll Do

• Build and evolve scalable payment solutions within a microservices environment
• Take ownership of features from idea to production
• Contribute to architecture and technical decision‑making
• Partner closely with product, engineering, and platform teams
• Improve performance, reliability, and developer experience
• Write clean, maintainable, and well‑tested code

How We Work

• Agile, collaborative teams with high ownership
• "You build it, you run it" mindset
• Code reviews and knowledge sharing
• Continuous improvement in both technology and ways of working

Tech Stack

Java 17+, Spring Boot, React, TypeScript, AWS, Docker, Kubernetes, Terraform, PostgreSQL, Oracle, Jenkins, Prometheus, Grafana, ELK

Qualifications

• Experience building modern software applications at scale
• Good knowledge of Java and Spring‑based development
• Experience with frontend technologies such as React and TypeScript
• Familiarity with cloud platforms, CI/CD, and distributed systems
• Passion for clean architecture and quality engineering practices
• Collaborative mindset with a sense of ownership and curiosity

Nice to Have

• Experience in payments or e‑commerce environments
• Exposure to observability and monitoring tools
• Interest in AI‑assisted development tools such as GitHub Copilot

Additional Information

Headquartered in Munich with offices across Madrid, Kraków, Wrocław, London, and Vienna. We offer hybrid working (60% office, 40% home) and the option to work 20 days abroad in approved countries. Career development opportunities, excellent training and support, wellbeing offers, subsidised transport or bike leasing, and a 20% discount across all products.

Equal Opportunity

At zooplus, we believe in equal opportunity and support everyone to fulfil their potential. We recognise the power of listening and learning from each other and embrace diversity and inclusion of all.