Senior Backend Engineer Tech Lead (3-4 month long) - Remote - Latin America

FullStack; Córdoba; Remote; ARS 182,485,000 - 273,727,000; Part time

Benefits offered by this job

100% remote work

Opportunity to work with Fortune 500s

Continuing education opportunities

Job summary

FullStack is seeking a Senior Backend Engineer Tech Lead to join a client’s team for a 3-4 month project. You will work alongside designers and engineers daily, influence architecture, and build robust API middleware and BFFs for mobile platforms.

The role requires AWS, MongoDB, and experience leading teams in Agile settings. Ideal candidates have 6+ years of software engineering, a four-year degree, and advanced English.

Qualifications

• 6+ years of professional software engineering experience.
• 2+ years of technical leadership influencing architecture and engineering direction.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Expertise in Node.js and TypeScript.
• Experience with AWS cloud services (EC2, ECS, Lambda, ElastiCache, S3, CloudFront).
• MongoDB experience and backend deployment pipelines optimization.
• Experience with Salesforce OCAPI/API, CMS-driven content management, and mobile-specific integrations.
• Strong history of designing scalable microservices and event-driven architectures for high-scale e-commerce systems.
• Experience with AI development tools (LangChain or LlamaIndex) and agentic workflows.

Responsibilities

• Integrate directly into the client team and collaborate daily with designers and engineers.
• Architect and implement Backend-for-Frontend (BFF) solutions and robust API middleware for mobile platforms.
• Design scalable microservices and ensure CI/CD delivery pipelines are robust.
• Represent the engineering team in client interactions and coordinate with external vendors.

Skills

Node.js

TypeScript

Backend-for-Frontend (BFF)

AWS

MongoDB

Microservices

API middleware

CI/CD

Agile/Scrum

LLM tools

Education

Bachelor's degree

Tools

Salesforce OCAPI

CMS platforms

LangChain

LlamaIndex

Job description

About FullStack

FullStack is your AI-native engineering partner, built to turn AI capability into certainty. Most companies can demo AI; few can get it to production and prove what it produced. We close that gap with three capabilities, AI built into your products from the start, elite vetted talent who apply it, and transparent execution that shows value every step of the way. With now over 600 customers in North America, FullStack is one integrated partner for all your AI engineering needs. With FullStack, you move forward with confidence.

We’re Most Proud Of

• Offering life-changing career opportunities to talented software professionals across the Americas.
• Building highly-skilled software development teams for hundreds of the world’s greatest companies.
• Having delivered hundreds of successful custom software solutions, which have positively impacted the lives and careers of millions of users.
• Our 4.1-star rating on GlassDoor.
• Our client Net Promoter Score of 68, twice the industry average.

The Opportunity

Join our talent network and connect with U.S. clients for flexible, project-based development work as a Senior Backend Engineer Tech Lead (3-4 month long).

• You will integrate directly into our client's team and work alongside their existing designers and engineers on a daily basis.

What We're Looking For

• 6+ years of professional software engineering experience.
• 2+ years of experience in technical leadership influencing architecture and engineering direction.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Expertise in Node.js and TypeScript.
• Track record of architecting Backend-for-Frontend (BFF) systems and robust API middleware specialized for mobile platforms.
• Demonstrated experience working with AWS cloud services (specifically EC2, ECS, Lambda, ElastiCache, S3, and CloudFront).
• Solid background in MongoDB and optimizing backend deployment pipelines.
• Experienced with Salesforce OCAPI/API, CMS-driven content management, and mobile-specific third‑party integrations.
• Strong history of designing and securing scalable microservices and event‑driven architectures for high‑scale e‑commerce systems.
• Comfortable working with AI development tools, including LLM integration (LangChain or LlamaIndex) and agentic workflows.
• Skilled at representing engineering teams in client‑facing interactions and collaborating with external vendors.
• Ability to work through new and difficult issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of applications.
• Forensic attention to detail.
• A positive mindset and a can‑do attitude.
• Experience working on Agile/Scrum teams.
• Meaningful experience working on large, complex systems.
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon.
• Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on the commitments you and your team make to them.

Nice To Have

We’re Seeking Engineers Who Are AI‑enthusiastic In Their Workflow. Professional Experience Or Personal Project Work With The Following Is a Significant Plus

• Cursor, Windsurf, or Google Antigravity.
• Claude Code, Gemini CLI, Codex, or Copilot CLI.

Work Authorization Requirements

• Applicants must be currently authorized to work in the country of this job posting on a full‑time basis.
• FullStack will not sponsor applicants for work visas now or in the future.

What We Offer

• Competitive pay.
• 100% remote work.
• The ability to work with leading startups and Fortune 500 companies.
• Continuing education opportunities.
• Opportunity to grow and expand your career.

Our talent network is committed to fostering a diverse, inclusive, and accessible environment where IT professionals can find opportunities that match their skills. We welcome individuals of all races, religions, genders, sexual orientations, national origins, abilities, and experiences. Our focus is on connecting talent with projects based on qualifications, ensuring a fair and transparent process that values diverse perspectives and global collaboration.

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