Backend Engineer (Node.js)

About the Position

Join as a freelance Backend Engineer (Node.js) to own and evolve backend architecture for IoT projects end-to-end, including data ingestion pipelines, API design, and infrastructure decisions. Lead technical trade-offs with clear explanations to both the team and clients, and drive architecture practices through RFCs, reviews, and post-mortems. Collaborate closely with firmware, mobile, QA, PM, and clients, using AI tools as part of your daily workflow.

Responsibilities

• Own and evolve backend architecture for IoT projects (data ingestion pipelines, API design, infrastructure decisions)
• Make and defend technical trade-off decisions
• Design and maintain AWS cloud infrastructure with production-grade reliability
• Lead technical discussions: RFCs, architecture reviews, post-mortems
• Mentor backend engineers and raise code quality standards
• Collaborate with firmware, mobile, QA, PM, and clients
• Use AI tools daily in practical development workflows
• Challenge product and technical assumptions when they don’t add up

Requirements

• 7+ years of backend development with a meaningful portion spent leading technical direction
• Strong production Node.js skills at scale
• Hands-on AWS expertise: EKS, Aurora, DynamoDB, Timestream, S3
• Experience with Kubernetes (EKS), Docker, and Terraform
• Solid understanding of distributed systems, event-driven architectures, and data pipelines
• Experience with MQTT or similar IoT messaging protocols
• CI/CD pipelines you have designed yourself (GitHub Actions, GitLab CI, Jenkins)
• English B2+ (written and spoken)
• Ability to translate business needs into technical decisions and communicate them to non-technical stakeholders
• Ability to hold strong opinions while staying open to changing direction based on evidence

We Offer

• 90–180 PLN/h net B2B (depending on experience) during freelance period; time-and-materials model
• Flexible working hours; fully remote
• Option for Warsaw office / Gdansk coworking
• Internal knowledge sharing (tech talks, experiments, side projects)
• After 3 months (if a good match): path to permanent contract with fixed monthly salary, 26 days paid leave, 10 sick days, Saltus medical care, and a training budget
• Note: during the freelance period there are no paid leave or medical benefits; those come with the permanent contract

About the Company

.intent is a company that values innovation and technical excellence. We are committed to delivering high-quality solutions and fostering a collaborative work environment.