Senior Backend Platform Engineer — Config & APIs

Seesaw; México; On-site; MXN 1,000,000 - 1,500,000; Full time

Job summary

Seesaw is seeking a senior backend engineer to evolve and build internal platform services, especially configuration, for a sophisticated SaaS product. You will own complex capabilities across build-time, runtime, and customer-managed settings, collaborating with cross-functional teams and leadership to ensure reliability, security, and scalable operations.

You will contribute to architecture, execute hands-on development, and drive incremental delivery in a director-led engineering environment,

Qualifications

• 8+ years of backend engineering experience with ownership of complex platform services.
• Strong Python and AWS proficiency; proven API design experience.

Responsibilities

• Design and implement scalable backend services and internal APIs.
• Develop layered configuration model with build-time, runtime, and customer settings.
• Build runtime configuration and feature-flag capabilities with safe rollout and auditability.
• Model state transitions and recovery paths for platform capabilities.
• Define interfaces between shared platform capabilities and product-facing services.
• Ensure authentication, authorization, auditability, and secure-by-default practices.
• Collaborate with infrastructure and application teams to deliver production-ready systems with tests and observability.

Skills

Python

AWS

API design

Distributed systems

State management

Security by design

Independent delivery

Tools

Internal tooling

Job description

Seesaw is seeking a senior backend engineer to evolve and build internal platform services, especially configuration, for a sophisticated SaaS product. You will own complex capabilities across build-time, runtime, and customer-managed settings, collaborating with cross-functional teams and leadership to ensure reliability, security, and scalable operations.

You will contribute to architecture, execute hands-on development, and drive incremental delivery in a director-led engineering environment,