Senior Fullstack Symfony / React Developer

Amnistreasury; Remote; Confidential; Full time

Job summary

A leading fintech company is seeking a Senior Fullstack Developer who specializes in Symfony and React. This role involves mentoring other developers, maintaining the Symfony backend, and implementing performance optimizations. Ideal candidates will have over four years of relevant experience and a proactive mindset. Benefits include opportunities for career growth, autonomy in technical decisions, and impactful work affecting SMEs in the fintech sector. Candidates should apply in English and be based in the EU.

Benefits

Growth Opportunities

Autonomy & Ownership

Career Development

Qualifications

• Minimum of 4 years of hands-on experience with Symfony (preferably SF4+) and ApiPlatform.
• Minimum of 4 years of hands-on experience with React.
• Experienced with testing tools such as PHPUnit, Behat, and Playwright.

Responsibilities

• Provide support and mentorship to other developers.
• Analyze, maintain, and improve the Symfony-based backend and React-based frontend.
• Proactively identify performance bottlenecks and implement optimizations.

Skills

Symfony

React

Docker

Problem-solving

English (B2 or higher)

Education

Degree in IT or Software Development

Tools

MySQL

Redis

Azure Kubernetes

Job description

AMNIS is a Fintech company with the mission to reshape international transaction banking for SMEs. Founded in Zurich in 2014, Amnis simplifies international business for small and medium-sized companies across Switzerland and Europe.

As our reach and impact continue to grow, we are seeking a Senior (backend heavy) Fullstack Developer (Symfony/React) who thrives on deep technical challenges and takes full ownership of their work, rather than just executing predefined tasks.

Why Join Us:

At Amnis, you’ll tackle complex, large-scale fintech systems—not just another CMS or E-Commerce site. We’re looking for someone who reasons about architecture and design, understands the why behind the code, and is eager to invest the time needed to truly comprehend our system’s intricacies. You will have the opportunity to shape the future of fintech for SMEs in a company that values innovation, collaboration, and personal growth.

Tasks

• Provide support and mentorship to other developers
• Analyze, maintain, and improve the Symfony-based backend and React-based frontend
• Proactively identify performance bottlenecks and implement forward-thinking optimizations.
• Bring fresh ideas to the table, influencing both technology choices and development practices.
• Stay up‑to‑date with industry trends, best practices, and emerging technologies to ensure the continuous improvement of our software development processes

Requirements

• Degree in IT, Software Development, or equivalent practical experience
• Minimum of 4 years of hands‑on experience with Symfony (preferably SF4+) and ApiPlatform
• Minimum of 4 years of hands‑on experience with React
• Practical knowledge of Docker and Message Queue systems
• Experienced with testing tools such as PHPUnit, Behat, and Playwright
• Strong problem‑solving mindset coupled with a proactive, ownership‑driven approach
• Language Proficiency: English (B2 level or higher); German is a plus
• Geographic Requirement: Applicants must be based in the EU

Our Tech Stack:

• Backend: PHP (Symfony)
• Frontend: JavaScript (React / React Native)
• Database: MySQL
• Other Tools: Redis, Docker, Azure Kubernetes (knowledge is a plus)

Benefits

Impactful Work: Shape the future of fintech solutions for SMEs Growth Opportunities: Play a pivotal role in our expansion and the rollout of innovative features
Autonomy & Ownership: Have a real influence on technical decisions and architecture
Career Development: Join a team that values continuous learning and growth.

If you recognize yourself in the profile described, we look forward to hearing from you.

If you’re a strategic thinker who enjoys diving into complex code, taking ownership of projects, and proactively driving meaningful improvements, we’d love to hear from you. Please send your application in English.