Sr. Backend Fullstack Engineer

Remote, USA Full-time Posted 2026-05-04
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Salary: Negotiable

Level: Senior (5–10 years of experience), Expert (10+ years of experience)

Skills: Fullstack Engineering, ReactJS, NodeJS, SQL, Azure, .NET


Tasks


  • Focus on the backend of Client platform, while also traversing the stack to contribute to the frontend web (Hotwire) and mobile experiences.

  • Design and implement systems and features that align with both business goals and end-user needs.

  • Maintain, monitor, and optimize the performance and scalability of Client ’s core product and backend infrastructure.

  • Ensure high standards of code quality, reliability, and security across all services.

  • Quickly troubleshoot and resolve bugs or system issues as they arise in production.

  • Continuously improve client's codebases, developer workflows, and internal tools for better efficiency and maintainability.

  • Work cross-functionally with Product, Design, and other Engineering teams to fully understand product requirements and assess the real-world impact of your work.


Requirements

You’ll be a great fit if you:


Have 6+ years of experience as a Backend or Full-stack Engineer, handling projects of various complexities



  • Are highly proficient with Ruby on Rails

  • Have experience working with Javascript

  • Have strong experience working with relational databases, mainly PostgreSQL, and ORM libraries like ActiveRecord

  • Enjoy significant ownership and take pride in your independence

  • Like to ship code and test user-facing changes swiftly and rapidly

  • Can learn quickly in a new environment and has a can-do attitude with a solutions-focused mindset

  • Are a great communicator and collaborator who’s able to work and thrive in cross-functional environments

  • Love remote work


Bonus points if you:


Commercial experience with React/React Native



  • Experience or is willing to learn Hotwire / Stimulus

  • Experience in the FinTech or SaaS space

  • Experience working in a distributed international team(s) environment


Benefits

Benefits


A fully remote company



  • Unlimited paid time off + bank holidays

  • Generous equity package

  • Fast upward career growth


Work-life balance


Team off sites and fun activities



  • Inclusive work environment

  • Flexible schedule


Preferred



  • Experience as a technical team lead, especially leading a scrum team.

  • Experience with cloud platforms such as AWS, Azure, or Google Cloud.

  • Familiarity with containerization technologies like Docker and Kubernetes.

  • Knowledge of CI/CD pipelines and DevOps practices.

About the company

Ant-tech is a reputable headhunter agency in France, specializing in providing high-quality recruitment services for companies across various industries. With a team of experienced professionals and an extensive network of partners, Ant-tech connects talented candidates with organizations in need, particularly in the technology, finance, and other sectors. Committed to delivering optimal recruitment solutions, Ant-tech focuses not only on finding the right talent but also ensuring long-term and sustainable growth for both candidates and partner companies.


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