We are looking for a Backend Engineer to join a distributed, product-focused platform team building the services and processes that power a B2B2C wellbeing and benefits platform. You will work in a mid-senior team spread across Chile, Mexico and Spain, taking ownership of backend services on a modern AWS serverless stack, with a strong emphasis on security, reliability and clean integration with third-party partners.
Day to day you will design and implement REST APIs and event-driven services, integrate with external partners and internal domains, harden the security of the systems you own (access control, secrets, input validation), maintain and upgrade existing services (library and version upgrades, vulnerability remediation), and keep quality high through testing and code reviews. This is a hands-on, autonomous role: the team defines the “how”, so we value a strong analytical mindset, pragmatic judgement and clear communication over knowing every tool by heart.

MUST
Node.js & TypeScript:



4+ years of overall backend experience and 3+ years building production services with Node.js and strict TypeScript.
AWS Serverless: Solid hands-on experience with AWS serverless (Lambda, API Gateway, Step Functions), including deployment, configuration and troubleshooting in production.
Backend Security (core focus): Ability to secure the services you own: least-privilege IAM, secrets management, input validation and sanitization (DTO/schema validators), parameterized queries to prevent injection, and secure API design. This is the primary focus of the role.
Relational Databases: Strong PostgreSQL skills: schema design, query optimization, transactions and behavior under concurrency.
NoSQL Databases: Practical experience with DynamoDB (or an equivalent NoSQL store): access-pattern modeling, indexing and trade-offs versus relational.
Event-Driven Architecture: Experience designing services that communicate through queues/topics, with idempotency, retries and dead-letter handlin

📌 Backend Engineer (Argentina)
🏢 Somnio Software
📍 Argentina