About The Role

We’re looking for a Senior Backend Engineer to independently own features and deliver high-quality backend systems. You’ll take projects from spec to production, write code that others want to work with, and help mentor newer engineers. At this level, you’re a reliable, autonomous contributor—you can scope and ship features end-to-end with minimal guidance and proactively unblock yourself and others.

What You’ll Do
- Own features end-to-end — scope, design, build, test, and ship features independently
- Write quality code — deliver clean, testable, well-documented code with strong testing discipline
- Unblock the team — proactively help teammates debug issues and remove blockers
- Handle on-call — confidently respond to incidents using observability tools
- Mentor newer engineers — support E1s through pairing, onboarding, and code review
- Leverage AI daily — use AI tools to accelerate coding, debugging, testing, and learning
- Pay down tech debt — identify and fix issues that slow the team down

What We’re Looking For

Technical




- 3+ years building backend systems
- Strong experience with Java (Python/Go a plus)
- Good understanding of distributed systems, APIs, and cloud infrastructure
- Strong testing discipline—unit tests, integration tests, edge cases
- Systematic debugging skills across service boundaries

AI Fluency
- Uses AI tools (Copilot, Claude, ChatGPT) daily for coding, debugging, and test generation
- Builds reusable prompts or workflows that help the team
- Teaches effective AI usage to junior engineers
- Curious about new AI capabilities relevant to backend development

Communication
- Writes clear design docs and runs small design discussions
- Gives and receives direct, timely feedback
- Fluent in Spanish; working knowledge of English for cross-team collaboration

Mindset
- Self-directed; you don’t wait to be told what to do
- Comfortable with ambiguity and changing requirements
- Product‑minded—you care about business outcomes, no

📌 Sr. Backend Engineer (Ciudad de México)
🏢 Aplazo
📍 Ciudad de México