Senior Fullstack Engineer, Freelance

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Sweep

WebsiteLinkedInAll Job Openings

51 - 200 employees

🤝 B2B

📋 Compliance

☁️ SaaS

B2B • Compliance • SaaS

SWEEP is a leading sustainability data management platform designed to help organizations track, disclose, and take action on their carbon and ESG (Environmental, Social, and Governance) data. The platform offers tools to manage carbon footprints, understand value chain emissions, meet disclosure requirements such as CSRD and SFDR, and get audit-ready with efficient data strategies. SWEEP works with enterprises, midmarket firms, and financial institutions to streamline their sustainability data collection and compliance processes, all while providing insights to drive data-driven sustainability strategies.

📋 Description

• Build and own core product features - Design and implement full-stack features from the ground up: database schema, backend logic, GraphQL API, and React/TypeScript UI • Take full ownership of significant parts of the system: reliability, performance, and long-term maintainability are yours to drive • Participate in every stage of the development lifecycle, from design and implementation to rollout and smooth operation in production • Contribute to and challenge our technical architecture as we scale • Bring genuine backend depth - Design robust data models and schemas built to perform at scale • Build and operate backend services, including background jobs, async pipelines, and integrations with third-party systems • Own observability: instrument systems, define meaningful metrics, and respond to incidents with confidence • Identify and address security risks proactively from API design to infrastructure exposure • Automate deployments via our CI/CD systems and continuously improve development processes • Work with AI as a day-to-day accelerator - Leverage AI tools actively in your workflow, from code generation and review to debugging and documentation, to move faster without compromising quality • Contribute to how we integrate AI-assisted development practices across the engineering team • Stay curious about emerging AI capabilities and bring new ideas on how we can use them to ship better, faster • Be a team force multiplier - Lead technical design on significant features and share your experience openly • Review pull requests with rigor and care, raising the bar for the whole team • Participate actively in team rituals: stand-ups, planning, retros • Contribute to our culture of quality: incremental, well-tested, observable changes • Pursue quality, always - Champion clean code, solid test coverage, and strong engineering practices • Improve processes and methodologies to reach the highest standards • Bring excellence to your own work and help others do the same.

🎯 Requirements

• 5+ years of experience shipping product across the full stack, with strong backend foundations • Fluent in React/TypeScript on the frontend; deep expertise in relational databases, distributed systems, observability, and security on the backend • Comfortable owning features end-to-end with autonomy and clear communication • Strong plus: Ruby on Rails experience in a high-scale production environment • You write clean, well-tested code and take genuine ownership of your work.