Localize (https://localizejs.com/) is seeking a Senior Platform Engineer to join our growing product engineering team. As Localize expands, the scalability, reliability, and performance of our infrastructure and applications have become paramount. As a critical member of our product engineering team, you will own and improve Localize's technical infrastructure, databases, and platform tooling, including monitoring, alerting, and maintenance. Your scope extends beyond delivering product tickets: you will strengthen the software development lifecycle (SDLC) and be responsible for the scalability, stability, reliability, performance, and security of the Localize platform. You will partner closely with leadership and fellow product engineers to translate business priorities and customer needs into execution, remove obstacles, and make thoughtful tradeoffs that keep the team moving forward. Like every product engineer at Localize, you are expected to be customer\-obsessed and business\-aligned: connect technical decisions to customer trust, product quality, and business outcomes. This role reports directly to the Engineering Manager. This is a hands\-on software engineering role as well as an infrastructure ownership role. You will be expected to operate at a senior backend engineering level, contributing production application code and owning complex changes from design through rollout and ongoing operation. You will also contribute across the stack when needed to deliver complete customer\-facing solutions, balancing product development with infrastructure, security, and developer experience priorities. **Key Responsibilities:** * Oversee and manage Localize's infrastructure across AWS and Cloudflare. * Design, build, test, and maintain backend services, APIs, and background processing workflows. Work hands\-on in the Localize application, including the dashboard, public APIs, legacy workers, and BullMQ workers; not only the infrastructure that supports them. * Own complex product engineering work end to end: clarify requirements, propose pragmatic designs, implement application and infrastructure changes, and validate releases in production. Contribute frontend changes when needed to complete the customer experience. * Apply sound engineering judgment to data modeling, API contracts, asynchronous processing, and failure handling. Diagnose and resolve application\-level performance and reliability issues, including inefficient queries, queue bottlenecks, and search behavior. * Raise the quality and maintainability of the codebase through automated tests, thoughtful code reviews, and incremental refactoring. Share knowledge and mentor teammates on backend design, debugging, and operationally sound software development. * Ensure the scalability, reliability, performance, and security of Localize's data stores, specifically Redis and MongoDB, through effective configuration, monitoring, query optimization, and backup management. * Own and improve deployment process and release processes, emphasizing automation, repeatability, safe rollouts, and reliable rollback procedures. * Partner with product engineers to improve the full SDLC, including development environments, CI/CD, automated quality and security checks, and release readiness. Treat this work as a core engineering responsibility alongside product delivery. * Take a leading role in infrastructure security and SOC 2 Type II compliance, partnering with engineering leadership and compliance stakeholders to operate and improve technical controls, maintain audit\-ready evidence, support audits, and remediate findings. Responsibilities include access management, vulnerability management, change management, logging, and backup and recovery controls. * Help lead incident response and blameless post\-incident reviews, translating lessons into improvements that protect customers and reduce recurring operational risk. * Prioritize infrastructure and SDLC improvements based on customer impact, business priorities, and risk. Communicate tradeoffs clearly and assess results through reliability, delivery speed, security, and cost\-efficiency. * Own and improve monitoring of uptime and performance using tools such as Datadog, Clickhouse, HyperDX, and more * Identify, plan and implement improvements and optimizations for infrastructure regarding cost, reliability, scalability. * Develop and maintain detailed documentation and maps of our infrastructure and dependencies. * Play an active role in Developer Experience enhancement * Actively learn new technologies and systems to improve the efficiency and capabilities of our infrastructure. Technologies *Experience with the specific technologies below is a plus unless listed under Must\-Have Skills. Security and compliance, including support for SOC 2 Type II, are core responsibilities of this role—not optional areas of involvement.* * AWS: Elastic Beanstalk, SQS, Cloudfront, EC2, Elasticache, Route 53, VPS * Platforms: Kubern