Sr Fullstack Engineer - Capacity & Matching Consultant - (remote - Mexico)

Job description

**Engagement Overview** Inflect is engaging an independent Sr Fullstack Engineer - Capacity & Matching Consultant in Mexico through [Rippling](https://www.rippling.com/) (acting as Contractor of Record), who will serve as the primary advisor for the Gateway and Capacity Matching cluster within the Intelligence Engine. This is an autonomous, high-impact consulting engagement focused on building and maintaining the full-stack matching-to-transaction spine, algorithmic confidence scoring, cost optimization logic, and gateway service infrastructure. Working as an external subject matter expert, you will provide technical execution across the coupled Gateway and Capacity Matching surface while serving as cross-coverage backup owner for the RouteFinder and Site Prover cluster, ensuring core platform intelligence runs with high availability, accuracy, and automated resiliency. **Who We Are** We are a US-based advisory and marketplace that is revolutionizing the way companies buy and sell digital infrastructure (Datacenter, cloud, and network services). Digital infrastructure services are the building blocks of the internet and at the core of every industry. Traditionally it’s been bought manually through service provider sales people, resulting in high costs, slow procurement cycles, and services that aren’t the best fit - slowing down the ability of companies to build and innovate. Inflect’s marketplace and advisory are removing friction so any company can get what they need, when they need it, with the right deal terms. By achieving our mission, we unlock businesses to build and human innovation to inflect! **Specialized Technical Capabilities Required** - **Full-Stack Engineering Mastery:** 7–10 years of professional full-stack engineering expertise, with deep production proficiency in Go (backend services) and React/TypeScript (frontend interfaces). - **Algorithmic & Gateway Architecture:** Applied experience designing, building, and tuning algorithmic matching, ranking, scoring, or recommendation frameworks, combined with API gateway and integration-heavy backend architectures. - **Data & Cloud Substrate:** Hands-on experience with relational databases (Postgres), cloud deployments (AWS), event-driven messaging, and integrating data pipelines. - **Cross-Border Async Collaboration:** Fluent professional English communication skills for effective cross-border async collaboration, code reviews, and daily alignment across Brazil, Poland, and US time zones. **Scope of Services & Project Deliverables** - **Gateway & Capacity Matching Delivery:** Architect, build, and maintain Go-based backend services and React/TypeScript surfaces for Capacity Matching and the Inflect Gateway as one coupled surface. - **Algorithmic Engine Optimization:** Evolve matching, confidence-scoring, and cost-optimization logic to satisfy rigorous precision and explainability requirements. - **Cross-Cluster Backup & Coverage:** Serve as secondary owner and backup for the RouteFinder and Site Prover cluster, participating in cross-coverage, incident response support, and PR assessments. - **Cross-Pod & Data Integration:** Partner with Data Foundation and Lead-to-Cash pods to ensure source-data quality alignments and seamless gateway transaction surface integrations. - **Technical Advisory & Quality Standards:** Deliver well-tested, observable code and conduct pull-request assessments under the pod lead's technical direction. **Definition of Success (What Strong Performance on Projects Looks Like)** - Gateway and Capacity Matching features are independently shipped and operating reliably in production. - Capacity Matching algorithms and gateway flows achieve strict performance and accuracy standards. - Effective backup coverage and cross-support are established across RouteFinder and Site Prover clusters without single-point dependencies. - The Gateway & Capacity Matching cluster is reliably owned and maintained end-to-end under pod technical standards. **Engagement Terms & Compliance Structure** - **Contract Type:** Fixed-rate monthly Independent B2B Service Agreement executed via Rippling at $6,500-$8,000/mo based on experience - **Invoicing & Tax Compliance:** Independent contractor must be registered with the Mexican tax authority (*SAT*) under an applicable business tax regime (e.g., *RESICO* or *Persona Física con Actividad Empresarial*) and issue valid electronic invoices (*CFDI - Comprobante Fiscal Digital por Internet*) uploaded into Rippling for monthly disbursement. - **Autonomy:** Complete flexibility over work schedules, location, and execution methods necessary to fulfill project deliverables and agreed milestones; holds no direct people-management, hiring, or employee reporting lines. - **Commercial Relationship:** Strictly B2B consulting engagement; no employment relationship under the Federal Labor Law (*LFT*), *Aguinaldo* (Christmas bonus), profit sharing (*PTU*), paid vacation, or statutory employee benefit guarantees implied.