Senior Backend Engineer Tech Lead (3‑4 month contract, Remote)

About the role

FullStackFullStack is seeking a Senior Backend Engineer to act as Tech Lead for a 3‑4 month remote engagement. You will join a U.S. client’s product team, collaborating daily with designers and engineers to deliver high‑performance backend solutions for mobile‑focused e‑commerce platforms.

Key responsibilities

• Define and drive architecture for Backend‑for‑Frontend (BFF) services and API middleware.
• Design, implement, and secure scalable micro‑services and event‑driven components.
• Lead the team in CI/CD pipeline creation and continuous delivery practices.
• Integrate AI tools such as LangChain or LlamaIndex into product workflows.
• Represent engineering in client‑facing meetings and coordinate with external vendors.

Required profile

• 6+ years of professional software engineering experience.
• 2+ years in technical leadership influencing architecture.
• Advanced English communication skills.
• Completed a four‑year college degree.

Required skills

• Node.js and TypeScript.
• AWS services: EC2, ECS, Lambda, ElastiCache, S3, CloudFront.
• MongoDB and backend deployment pipeline optimization.
• Salesforce OCAPI/API and CMS‑driven content management.
• AI development tools (LangChain, LlamaIndex) and agentic workflows.
• Design of scalable micro‑services and event‑driven architectures.

What we offer

• Remote work with flexible hours.
• Opportunity to lead a high‑impact project for a global client.
• Exposure to cutting‑edge AI integration and e‑commerce infrastructure.