Backend Engineer

Calyptus; Massachusetts; On-site; USD 90,000 - 130,000; Full time

Job summary

A technology firm in Massachusetts seeks an experienced Co-Founder to lead backend development focused on AI and blockchain solutions. Responsibilities include partnering with the Machine Learning team, guiding clients, developing APIs, and resolving technical issues. Candidates should have a strong background in Python, experience with cloud systems, and skills in troubleshooting complex issues. This full-time role requires effective communication and a problem-solving mindset, aimed at customer satisfaction.

Qualifications

• Proven experience in Python-based backend development.
• Skilled in troubleshooting complex production issues.
• Ability to design scalable, cloud-based systems and APIs.

Responsibilities

• Partner with the Machine Learning team for scalable solutions.
• Work directly with clients for technical guidance.
• Develop custom APIs and backend services for integration.
• Troubleshoot complex technical issues for clients.
• Deliver features for high-priority cases.

Skills

Python-based backend development

Complex production issues troubleshooting

Technical solutions delivery

Cloud-based systems and APIs design

PostgreSQL

FastAPI

Modern AI tools knowledge

LLMs and prompt engineering

Communication skills

Containerization and deployment (Docker, Kubernetes, AWS/Azure/GCP)

Job description

Co-Founder @ Calyptus | High Performance Talent at Scale | Blockchain & AI

What You’ll Do

• Partner with the Machine Learning team to design and implement scalable solutions that meet customer-specific requirements
• Work directly with clients to gather requirements, provide technical guidance, and serve as the post-go-live ML point of contact
• Develop custom APIs and backend services to enable seamless integration with customer environments
• Troubleshoot and resolve complex technical issues, acting as the technical liaison between customers and the engineering team
• Deliver small, targeted features to unblock high-priority edge cases and resolve customer tickets
• Partner closely with the ML team on inference/data pipeline issues, adding validation and guardrails where needed
• Collaborate with Product, Engineering, Customer Success, and Sales to refine features, improve customer experience, and produce clean documentation for smooth handover
• Contribute to continuous improvement of backend architecture and services, incorporating customer feedback and industry trends
• Build and maintain self-service tooling to enable non-engineers to diagnose and resolve common issues

Requirements

• Proven experience in Python-based backend development; exposure to frontend technologies (particularly React) is desirable
• Skilled in troubleshooting complex production issues, ensuring rapid resolution and system reliability
• Track record of delivering technical solutions and providing expert guidance to clients in professional services or consulting settings
• Ability to design and build scalable, cloud-based systems and APIs that integrate with client systems
• Experience with database technologies (preferably PostgreSQL) and backend frameworks such as FastAPI
• Knowledge of modern AI tools such as Cursor
• Hands‑on experience working with LLMs and prompt engineering
• Strong communication skills, able to convey complex technical concepts to both technical and non-technical stakeholders
• Problem‑solving mindset with a passion for customer satisfaction and delivering quality solutions
• Experience with containerization and deployment practices (Docker, Kubernetes, AWS/Azure/GCP) is a plus
• Demonstrated ability to balance technical excellence with business requirements and time constraints

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology and Engineering

Industries

Information Services