Senior Back End Developer Jobs in Wisconsin (NOW HIRING)

rePurpose is the Leading Packaging Sustainability and Compliance Platform for CPG brands to streamline EPR compliance and make credible sustainability claims.

At rePurpose, we believe a world free of plastic waste is achievable within our lifetime. To accelerate our impact, we are hiring a Senior Software Engineer with deep backend and infrastructure expertise to support our vision of solving the global waste crisis. As a Senior Software Engineer at rePurpose, you will play a central role in architecting and scaling our platform — building the reliable, high-performance systems that power compliance workflows, data pipelines, and sustainability insights for brands across the US and beyond.

This position is remote-only for East Coast candidates, but we prefer candidates based in New York to join our hybrid work environment.

• Backend Development: Design, build, and maintain scalable server-side services and APIs, with a focus on performance, reliability, and security.
• Infrastructure & DevOps: Own and evolve our cloud infrastructure on AWS, including CI/CD pipelines, containerized deployments, monitoring, and cost optimization.
• Full-Cycle Development: Contribute across the full software development lifecycle — from architecture and planning through implementation, testing, and production deployment.
• Codebase Enhancement: Optimize the existing codebase to improve performance, reliability, and maintainability.
• Collaboration: Collaborate closely with cross-functional teams (product, design, and other engineering teams) to translate requirements into technical solutions.
• AI Tooling & Technology Evaluation: Stay updated with industry trends, specifically in advancements in AI technologies. Propose adoption of new technologies where applicable to enhance the product’s and company’s capabilities.

• Backend Expertise: Deep experience building robust, scalable, production-grade applications using Node.js or related backend frameworks. Strong understanding of API design (REST and/or GraphQL), service architecture, and performance optimization.
• Infrastructure & Cloud: Hands-on experience with AWS (or comparable cloud platforms) and modern DevOps practices — including infrastructure-as-code (e.g., Terraform, CDK), containerization (Docker, Kubernetes), and CI/CD pipeline management.
• Database Knowledge: Proficiency in working with databases (SQL, NoSQL), designing schemas, optimizing queries, and ensuring data integrity.
• Security & Reliability: Familiarity with backend security best practices, observability tooling, and building fault-tolerant, highly available systems.
• AI Technologies: Experience with building, or interest in learning, agentic workflows.
• TypeScript Proficiency: Strong knowledge of TypeScript as it pertains to backend systems and data modeling.
• Full-Stack Awareness: Working knowledge of front-end technologies (HTML, CSS, JavaScript) and modern frameworks (React, Vue, etc.) to collaborate effectively across the stack.
• Agile & Collaboration: Comfortable working in an Agile environment, excellent communication skills, and the ability to collaborate effectively within a team.

• A degree in Computer Science, plus a minimum of 4 years of professional experience in software development, ideally in a cloud-based modern stack. TypeScript, Node.js, GraphQL, Vue, and AWS are all preferred.
• Strong problem-solving abilities and a proactive mindset towards learning new technologies.
• Prior experience working in a startup or fast-paced environment is a plus.
• Must be authorized to work in the United States.

$160,000 - $200,000 a year

Competitive Compensation: Enjoy a highly competitive salary package based on your skills and experience.

• New York Candidates (must work hybrid) - $180,000 - $200,000
• East Coast Candidates - $160,000 - $180,000

If this is out of your preferred range, we’d still encourage you to apply, as we value the right fit over anything else!

Performance-Based Incentives: Earn additional rewards as you achieve key milestones and contribute to our success.

Employee Benefits & Wellness Funds: Access medical coverage, a wellness fund, learning opportunities, and WeWork partnerships.

This role is open to candidates based in the United States, with a preference for those located in or near New York City. We offer a hybrid working model for local candidates, with remote flexibility for those elsewhere in the US.

We’re a truly global team, headquartered in New York City, with members across Miami, New York, Los Angeles, London, Bangalore, Delhi, Mumbai, Colombo, and Jakarta.