Senior Full-stack Developer (Python / FastAPI, React / TypeScript)

Description

We are building a new multi-cloud product and need a Senior Full-stack Developer to deliver Python/FastAPI services and React/TypeScript UI at scale. You will work with PostgreSQL, OpenSearch, and Databricks, improving performance and integrations across the stack. Apply now. Responsibilities Build and support web applications using Python/FastAPI and SQL Design APIs and integrations that can handle high-load database operations Tune and optimize query performance across production environments Implement front-end features with TypeScript and React Leverage GenAI engineering tools to enhance development workflows Coordinate with the team while independently delivering assigned work Communicate early and often with teammates and stakeholders Own product features and contribute beyond simply completing tickets Operate effectively in ambiguity and ship results in a fast-paced startup environment Requirements Proven track record with 5+ years of production work using Python, FastAPI, and SQL Strong expertise in web application engineering, API design, and third-party integrations Hands-on experience operating high-load databases and tuning query performance Working knowledge of TypeScript and React with readiness to contribute across front end and back end Practical experience with GenAI engineering tools, ideally Claude Code Excellent communication skills and a proactive mindset, able to collaborate and self-direct Demonstrated ability to execute amid ambiguity without constant guidance in a transparent, fast-moving startup environment English proficiency at B2 (Upper-Intermediate) level or higher Nice to have Strong exposure to TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand Experience working with PostgreSQL and OpenSearch Familiarity with cloud platforms, Infrastructure as Code, and related tooling Data engineering background, including PySpark and SparkSQL Client-facing experience

Requirements

• Proven track record with 5+ years of production work using Python, FastAPI, and SQL

• Strong expertise in web application engineering, API design, and third-party integrations

• Hands-on experience operating high-load databases and tuning query performance

• Working knowledge of TypeScript and React with readiness to contribute across front end and back end

• Practical experience with GenAI engineering tools, ideally Claude Code

• Excellent communication skills and a proactive mindset, able to collaborate and self-direct

• Demonstrated ability to execute amid ambiguity without constant guidance in a transparent, fast-moving startup environment

• English proficiency at B2 (Upper-Intermediate) level or higher

Responsibilities

• Build and support web applications using Python/FastAPI and SQL

• Design APIs and integrations that can handle high-load database operations

• Tune and optimize query performance across production environments

• Implement front-end features with TypeScript and React

• Leverage GenAI engineering tools to enhance development workflows

• Coordinate with the team while independently delivering assigned work

• Communicate early and often with teammates and stakeholders

• Own product features and contribute beyond simply completing tickets

• Operate effectively in ambiguity and ship results in a fast-paced startup environment

Seniority

• Senior

Nice to have

• Strong exposure to TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand

• Experience working with PostgreSQL and OpenSearch

• Familiarity with cloud platforms, Infrastructure as Code, and related tooling

• Data engineering background, including PySpark and SparkSQL

• Client-facing experience