Senior Full Stack Software Engineer

Full Stack Engineer - Payments & FinTech Web Applications

Location: Remote - Based in EST or GMT+1

Compensation: $120K - $150K

We are a high-growth technology company building a robust FinTech and payments platform. We are seeking an experienced Full Stack Engineer with strong product sense and deep technical expertise to design and build the secure, scalable, and high-performing web applications that power our platform. This role requires translating complex backend financial systems into intuitive, reliable user experiences.

You will own the development lifecycle of web applications from design through release, working across the full stack with an emphasis on the frontend user experience. You will collaborate closely with backend teams, ensuring that all features prioritize performance, security, and scalability. You will be expected to treat UI components and APIs as products, maintaining high standards for code quality and architectural clarity.

What You'll Do:

• Application Development: Build, optimize, and maintain web applications using React, TypeScript, NestJS, and Node.js.
• API Integration: Collaborate with backend engineers to design and consume secure, efficient APIs (REST).
• UX Translation: Translate complex financial and transactional workflows into clear, usable, and accessible interfaces.
• Architecture & Standards: Architect and implement front-end systems with strong attention to scalability, maintainability, and performance. Ensure accessibility, responsiveness, and cross-browser consistency.
• Leadership & Mentorship: Lead feature delivery end-to-end, review code, share best practices, and mentor peers to maintain a high engineering standard.
• Reliability: Troubleshoot and resolve production issues, ensuring reliability and data integrity for a transaction-heavy platform.

Requirements

• Experience:5+ years of professional front-end or full-stack software engineering experience.
• Core Expertise: Strong expertise in React, TypeScript, and web application architecture.
• Backend Proficiency: Proven experience with backend technologies including Node.js and NestJS.
• Database: Experience with data stores like MongoDB or Postgres.
• Integration & Security: Proven experience integrating with backend APIs and handling data securely.
• Design for Scale: Experience designing for scalability, maintainability, and fault tolerance in web applications.
• Soft Skills: Excellent communication and collaboration skills across cross-functional teams.

Preferred Experience (Nice-to-Have):

• Exposure to financial, payments, or other transaction-heavy domains.
• Experience contributing to or maintaining shared design systems or UI libraries.
• Experience with Cypress and E2E libraries.
• Knowledge of infrastructure and deployment (AWS, Kubernetes, Terraform).
• Familiarity with real-time data or event-driven architectures, or experience working in regulated environments (SOC2, ISO27001).

Benefits

• Impact: Directly contribute to the core user experience of a high-growth payments and FinTech platform.
• Technology: Work with a modern and robust stack: React, TypeScript, Node.js, NestJS, MongoDB/Postgres, Docker, Kubernetes, and Datadog.
• Culture: Collaborative environment that favors simplicity, clarity, and continuous improvement, prioritizing developer experience and resilience.
• Growth: Opportunity to mentor peers and drive technical standards across the organization.

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing human-resources@mlabs.city.

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