Senior Engineer, Full-Stack Software

Summary

Join Kepler, an award-winning company recognized by AdAge as a Best Place to Work in 2022, and become a Senior Full-Stack Engineer. We are building innovative data-driven solutions for advertising and marketing technology, leveraging advanced analytics and real-time data processing. This role involves designing and implementing robust full-stack solutions using React, TypeScript, and Python, contributing to technical decision-making, collaborating with cross-functional teams, and mentoring junior engineers. You will work on a sophisticated platform used by marketing professionals, offering significant technical contributions and growth opportunities. Kepler provides a transparent, collaborative, and fun work environment with competitive compensation and remote-friendly options.

Requirements

• 3+ years of experience in full-stack development
• Some experience (1+ years) in team leadership or people management in a technical context
• Strong knowledge of React, TypeScript, and modern JavaScript practices
• Proficiency in Python and related frameworks (Flask, FastAPI, or similar)
• Experience with SQL databases, ORM technologies (SQLAlchemy), and GraphQL (Apollo Client and Python-based servers)
• Familiarity with UI component libraries (particularly Mantine or similar)
• Experience with form management in React applications
• Understanding of state management patterns, testing frameworks, and deployment strategies
• Experience with build systems, module bundlers, and CI/CD pipelines
• Excellent verbal and written communication skills in English for technical discussions, documentation, and knowledge sharing
• Proficiency with preferred development environment (Mac or Linux) and related development tools
• Ability to collaborate synchronously with team members during core hours (10:00 AM - 6:00 PM US Eastern Time) while respecting work-life balance

Responsibilities

• Design and implement robust full-stack solutions using: React/TypeScript frontend with Mantine component library Python backend services (Flask, FastAPI, or similar) GraphQL APIs with Apollo Client (frontend) and Python-based GraphQL servers
• Contribute to technical decision-making processes while balancing business requirements with technical constraints
• Follow and help establish best practices for code quality, testing, and deployment processes across the entire stack
• Collaborate with product management, UI/UX designers, and engineering leads to implement technical specifications
• Implement scalable data models and APIs to support complex business logic
• Optimize application performance across multiple applications
• Apply type safety and code reusability best practices across the frontend and backend
• Participate in the full development lifecycle from planning to deployment
• Mentor junior engineers and provide technical guidance through code reviews
• Manage small teams for specific projects or features when needed
• Support team members' professional development with constructive feedback

Preferred Qualifications

• Experience in advertising technology or marketing analytics
• Knowledge of budget management and financial data systems
• Experience developing multi-app workspaces or monorepos
• Familiarity with data visualization libraries and techniques
• Understanding of accessibility standards and best practices
• Experience with real-time data processing systems
• Understanding of data privacy regulations and security best practices
• Experience with systems compliant with ISO 27001 and other security frameworks such as SOC 2, NIST 800-53, or HIPAA requirements
• Contributions to open-source projects or technical community
• Knowledge of first principles (e.g. basics of tools, internals of the computer, low level concepts and how work actually gets done, etc)
• Advanced degree in Computer Science or related field

Benefits

• Competitive compensation package
• Remote-friendly work environment
• Professional development opportunities
• Mentorship from experienced engineering leaders
• Growth opportunities to develop leadership skills