Flex
Senior Software Engineer, Backend
Remote Backend Development role with clear candidate location fit.
PostedJul 2, 2026
Eligible countries2 accepted countries
Seniority signalSenior
Work settingRemote
Accepted candidate locations
BrazilUSA
Role overview
Senior Software Engineer, Backend
Requirements and responsibilities
Readable role content extracted into sections for faster review.
What You’ll Do
- Ownership over large domains and features related to card processing/issuing, and core ledgering of financial transactions
- Play a critical role in the development, design, and maintenance of Flex's platform and services.
- Architect well thought-out services and data models that ensure Flex's continued growth
- Own problems end-to-end, thinking through everything from api contracts, data, scalability, security, observability, and metrics.
- Lead by example and mentor engineers in all aspects of planning, development and testing.
- Be a catalyst for driving best-in-class technology frameworks and tooling while staying engaged with the latest technology trends.
- Be on call, with the expectation to ability to solve problems and find solutions for the servicing team
What You Need
- Proficiency in NodeJS+Typescript and server design principles.
- An understanding and interest in architectural patterns for highly available, scalable, low-latency, asynchronous systems
- Ability to hold yourself and the team to high standards.
- Strong communication (written and verbal) and interpersonal skills.
- Ability to provide in-depth evaluation of multiple technical directions and determine tradeoffs of each.
- Strong propensity to make data-driven decisions on technical architecture and project prioritization.
- Exposure to modular monoliths and micro-services along with the benefits and challenges they bring.
- Experience with any cloud based provider like Google Cloud, AWS, or Azure.
- Four or more years of relevant industry experience with a track record of shipping high-quality products and features at scale.
- A strong work ethic and are ready to grind
- Have built and shipped a working project or product, ideally something complex
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