Fullstack Developer (Next.js/FastAPI/Pandas)

FULL_TIME

Remote | Senior | Full time | Programming

31 applications Last checked today

ⓘ Requires applying in English

We are building and maintaining a data-science-heavy application that supports an existing software solution in production. The system is built with Next.js on the frontend, deployed and managed across AWS and Vercel, and includes a strong Python data layer with heavy usage of Pandas, NumPy, and FastAPI. This role focuses on owning end-to-end changes (understanding how the UI, APIs, and data/ML-oriented computations interact) so we can keep the platform reliable, performant, and easy to evolve.

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We’re looking for 2 developers to maintain and extend our existing platform. Our ideal team member understands the full stack and can move comfortably between frontend, backend, and the data-processing parts of the system.

• Maintain and improve the application built with Next.js, ensuring stable user experiences and clean, maintainable UI code. - Develop and maintain FastAPIservices, including request/response design, validation, and error handling. - Work with PandasandNumPyto implement, optimize, and debug data transformations and computations used by the product. - Support deployments and runtime configuration across AWSandVercel(e.g., environment variables, build/deploy workflows, and monitoring signals). - Diagnose production issues end-to-end (UI → API → data processing) and implement fixes with strong test coverage where applicable.
• Collaborate with teammates to refine system architecture as requirements evolve, keeping performance and reliability in mind.
• Document changes and maintain understandable patterns so the codebase remains approachable.

We expect ownership: when a feature or fix is assigned, we want it to be delivered with clarity, quality, and a clear understanding of impact across the stack.

You’ll be most successful if you can connect the dots between UI behavior, API contracts, and the data-processing logic behind the results. We’re not only looking for someone who can “make changes”—we’re looking for someone who can reason about the whole system and improve it.

• Strong Next.js experience(components, routing, performance considerations, and debugging).- Backend experience with FastAPI(API design, dependency patterns, validation, and handling edge cases).- Data-processing proficiencywith- Pandasand- NumPy, including understanding performance implications and correctness.- Comfort with the full stack: you can explain how a change in the frontend affects API behavior and downstream data processing.- AWS and Vercel familiarityfor deployment workflows, configuration, and operational troubleshooting.- Practical debugging skillsacross environments (local vs. staging/production).
• Ownershipand a proactive mindset when requirements are not fully specified.- Clear communication- we want you to be comfortable explaining the nature of issues to non-technical team members and fielding feedback from the team.- Attention to detailfor data correctness and reliability, especially in a data science-oriented application.- Team collaborationto iterate quickly while keeping the codebase maintainable.

If you enjoy working at the intersection of web engineering and data-heavy computation, and you understand that reliability matters as much as new features, we’d like to talk.

• Experience optimizing Pandas/NumPy workloads (profiling, vectorization strategies, memory/performance trade-offs).
• Background in machine learning or data science pipelines (even if the product isn’t a full ML training system, we rely on data science-grade processing).
• Experience with automated testing for APIs and data logic (unit/integration tests, test fixtures, and regression checks).
• Familiarity with monitoring/observability practices (logs, metrics, tracing) to speed up incident resolution.
• Experience refactoring legacy parts of a production codebase while minimizing risk.

We’ll align on the working arrangement (hybrid/remote details) and the expectations for the role during the process. We prioritize ownership, code quality, and clear communication, especially in a data-intensive environment.

If you enjoy working across the full stack—Next.js, FastAPI, and Pandas/NumPy computations—and want to maintain and evolve an existing production platform, we’d be happy to review your background.

GETONBRD Job ID: 61556

** Fully remote **

Candidates can reside anywhere in the world.

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