Senior Software Engineer

About Altur

We are building what essentially is an ultra-efficient call center powered purely by AI agents. We process hundreds of thousands of AI-powered voice and WhatsApp conversations every day for some of Latin America's most important financial institutions.

Our entire stack, from telephony and real-time voice pipelines to LLM orchestration, is built in-house by a small team. That's our edge: we ship faster and iterate harder than companies 10x our size. But we're reaching the point where "move fast" needs to coexist with "build to last," and that's why this role exists.

We're YC-backed, profitable, and growing fast. We need someone who's as obsessed with clean architecture as they are with shipping.

About the role

We're looking for a senior engineer to join our core team in Mexico City and help shape Altur's product architecture and engineering culture as we scale.

You'll work directly with the founders daily. We value engineers who challenge our technical decisions and push us to do things the right way, not people who wait for instructions.

What you will do

• Ship daily and see your code live the next day.
• Design the architecture for real-time voice pipelines handling thousands of concurrent calls.
• Own the reliability and scaling of core infrastructure, Kafka event pipelines, Redis, telephony services.
• Shape how we integrate LLMs into production systems with low latency and high accuracy.
• Help build engineering culture from the ground up, code review standards, CI/CD practices, architecture patterns, and mentoring as we grow from 4 to 15+ engineers.
• Talk directly with our banking clients, understand their constraints, and translate that into product decisions.
• Help assemble a world-class engineering team: you'll be one of the earliest members and have a direct say in who we hire and how we work.

You'll be a good fit if

• You've helped scale an engineering team and codebase from early-stage to production-grade.
• You have 4+ years of experience as a software engineer working with a similar stack.
• You're obsessed with code quality, clear patterns, and the real-world results your code produces.
• You enjoy solving hard problems, writing efficient code, and shipping polished, end-to-end features.
• You enjoy solving hard, ambiguous problems and can learn fast without hand-holding (we don't expect you to know everything on day 1).
• You want high impact and ownership, not just a seat at the table, but a hand in building the table.
• You want to be involved in every aspect of the company, not just our code.
• You're excited about what AI can do to transform an industry that's been stuck for decades.

You’re not a good fit if

• You want a laid-back remote job.
• You avoid working on ambiguous, hard problems.
• You're skeptical about AI's ability to fundamentally transform industries.
• You're not looking to commit and grow with the company long term.
• You need everything defined before you start building.

Must haves

• Strong experience with Python and SQL databases.
• Experience with cloud infrastructure (bonus if AWS).
• Proven ability to design, build and scale secure production systems.
• Knowledge of CI/CD best practices, with the ability to identify possible improvements.
• Experience using Docker and Git.

Big plus if

• You have experience with Django and Postgres.
• You have worked on real-time voice or telephony systems.
• You are proficient in Go.
• You have experience scaling high-traffic, low-latency systems.
• You have used Apache Kafka in production.

Our stack

Django, Python, Go, Postgres, Typescript, React, Next, Redis, Kafka.

Our values

• High ownership. Make your own decisions and be responsible for them.
• Endurance. Think long term and act with integrity.
• Simplicity. Concise, clear and efficient work.
• Open minded. Hold strong opinions loosely, question them when the evidence says so.
• No ego. Winning as a team comes first.
• Passion. We want people that take pride in the work they do.

About the interview

• Quick intro with founders (20 min)
• Technical interview (1 hour)
• Take-home challenge (llms allowed)
• Culture interview (30 min)
• Design interview (2 hours, on-site if possible)
• Offer

Compensation & perks

• Competitive salary adjusted on experience + significant equity (%1).
• Visa sponsorship if required.
• Medical insurance.
• Gym membership.
• Top-notch setup in the office.
• In-person company offsite every year.
• Trips every now and then.