Backend Engineer

Icalia Labs is hiring a Backend Engineer with deep expertise in building scalable, production-grade APIs and a strong foundation in modern backend engineering.We're looking for engineers who go beyond implementation, professionals who understand how systems behave under load, how databases perform at scale, and how to design APIs that last. What you'll be working withRuby & Ruby on Rails (API development)PostgreSQL (query optimization, indexing, performance tuning)Sidekiq (background job processing in production environments)RSpec — building and maintaining test suites from scratchAWS (cloud infrastructure and services)Docker (containerized environments) What you'll doDesign and build high-performance APIs using Ruby on RailsWrite optimized database queries and deeply understand how data flows and scalesImplement and maintain asynchronous background processing systems with SidekiqDesign integrations with third-party services and APIs — including error handling, retry logic, and data sync patternsEnsure code quality through robust RSpec testing strategiesLead system design decisions: propose architecture, identify risks proactively, and communicate trade-offs clearlyCollaborate directly with a US-based engineering team on architecture and performance improvements What we're looking for8+ years of software engineering experience or equivalent practical backgroundStrong expertise in Ruby and Rails APIs in production environmentsClear understanding of how databases work and how to write efficient queriesHands-on experience with Sidekiq in production, not just configuration, but design and troubleshootingSolid knowledge of AWS and DockerStrong grasp of API best practices, backend architecture, and system designAble to think proactively: you identify what can go wrong before it doesProfessional-level English, you'll collaborate directly with a US-based engineering team Engagement detailsStart date: Mid September 2026Contract type: ContractorContract Duration: 1-year fixed-term contract, with a strong possibility of extension.Region: LATAM At Icalia Labs, we build scalable digital products with a strong emphasis on clean architecture, performance, and long-term maintainability.If you’re interested in solving real engineering challenges and shipping meaningful systems at scale, let’s connect! Pre-Employment Verification & Compliance NoticeAll candidates who advance through Icalia Labs’ selection process will be subject to a standardized pre-employment verification process, conducted consistently and in accordance with applicable laws and company policies. This process includes verification of government-issued identification and employment history, as applicable. Candidates will also be required to provide professional references for verification. Any material discrepancy or misrepresentation between the information provided and the information verified may result in withdrawal from the selection process, subject to applicable law.Icalia Labs is an Equal Opportunity Employer committed to fostering an inclusive workplace. Employment decisions are based on job-related qualifications, relevant experience, technical skills, and merit, in accordance with applicable equal employment opportunity and anti-discrimination laws.