**Responsibilities**:
- Own and evolve the platform's core architecture, including service boundaries, data models, and the shared libraries and infrastructure other teams build on.
- Design and implement secure, well-documented backend services and REST APIs, shaping API contracts and OpenAPI specifications.
- Design database schemas, caching strategies, and event-driven, message-based workflows that keep high-volume transaction processing consistent, performant, and resilient.
- Champion system reliability and security across the platform, including monitoring, alerting, error handling, data encryption, and secure API design that meets the standards of a regulated financial environment.
- Build and maintain secure, scalable integrations with major financial institutions and payment networks, translating complex banking protocols into robust, reusable platform capabilities.
- Implement high-volume transaction processing systems with the accuracy, idempotency, and auditability that financial operations require.
- Partner with Product, Architecture, and Engineering teams to translate business requirements into platform solutions, drive technical decisions, and advocate for reliability and security in architectural discussions.
- Mentor mid-level and junior engineers on backend best practices, code quality, system design, and platform engineering principles.
- Lead code reviews, establish coding standards, and help shape engineering culture as the team grows.
**Requirements**:
- 7+ years of software engineering experience with a strong focus on backend and distributed systems.
- Expert proficiency in Java and the Spring framework (Spring Boot),



with a track record of building complex, high-scale backend systems.
- Deep experience designing and building microservices and REST APIs, including OpenAPI-driven contracts and generated clients.
- Hands-on experience with containerization and orchestration (Docker, Kubernetes) and cloud platforms (AWS, GCP, or Azure).
- Strong system design skills across distributed systems, including database design, caching strategies, and message queues or event-driven architectures.
- Solid understanding of authentication and security best practices (OAuth2/OIDC, data encryption, secure API design) in a financial services context.
- Proven ability to debug complex issues, optimize performance, and architect solutions for high-scale, high-availability systems.
- Strong proficiency with modern AI coding assistants (e.g., Claude Code, GitHub Copilot, or similar), with a track record of using them to boost engineering speed, quality, and impact.
- Excellent communication skills and experience collaborating in cross-functional agile teams.
- Professional fluency in English (written and verbal); all engineering collaboration, documentation, code reviews, and stakeholder communication are conducted in English.
**Nice to have**:




- Experience with real-time payment systems or high-frequency transaction processing.
- Knowledge of banking APIs, SWIFT messaging, or ACH processing.
- Experience with event-driven architectures and stream processing.
- Background in fintech, payment processing, or B2B financial platforms.
- Familiarity with enterprise DevOps practices and infrastructure as code.
- A track record of leading backend architecture decisions and establishing engineering standards.
**What's on offer**:
- **Foundational technology ownership** — they'll own core platform services that process millions in B2B payments, directly powering how enterprise customers manage counterparties, execute payments, and maintain compliance.
- **A real technical voice** — their opinions on service architecture, API contracts, and data design will directly shape how the stack is built; this is a role that defines systems, not just maintains them.
- **A modern stack** — a thoughtfully chosen technology stack that values simplicity and pragmatism over hype, with new tools adopted where they add real value.
- **Early-stage impact** — a well-funded startup where their contributions will shape both the product and the engineering culture from the ground up.
- **An AI-forward culture** — AI is embraced as a tool for innovation and efficiency, with curious, adaptable engineers welcome to bring it into their work.
- **A strong, growing team** — a diverse team, including engineers from SAP and fintech innovators, who value technical excellence, continuous learning, and work-life balance.

📌 Senior Software Engineer (Ciudad de México)
🏢 Alcor
📍 Ciudad de México