Senior Backend Engineer - Python/ Java

**About Coderio** Coderio designs and delivers scalable digital solutions for global businesses. With a strong technical foundation and a product mindset, our teams lead complex software projects from architecture to execution. We value autonomy, clear communication, and technical excellence. We work closely with international teams and partners, building technology that makes a difference. Learn more: http://coderio.com In this role, you will join a rapid experimentation team focused on building and scaling digital products in the social\-financial space. You will not act as a “pure” coder, but as a technical driver with an end\-to\-end ownership mindset and the autonomous leadership capabilities to move experiments from a whiteboard sketch to a production environment. You will be the backbone of a cross\-functional squad, leveraging AI\-native technology such as Claude Code, GitHub Copilot, and Cursor to bypass traditional backend bottlenecks. Your focus will be on throughput and outcome, using modern tools to handle the heavy lifting so you can focus on system architecture, deployment strategy, and driving the team toward successful product iterations. You will work in an environment that blends the agility of Python and Django with the robustness of Java for integration, ensuring the experimentation platform remains both flexible and scalable. What to Expect in This Role (Responsibilities) Take full end\-to\-end ownership of backend features from initial architectural design through pull request management, testing, and final production deployment. Function as a self\-starting leader within the squad, identifying technical hurdles before they become blockers and driving the team toward delivery without requiring constant oversight. Build and maintain scalable APIs and services using Python and Django, specifically designed to support rapid A/B testing, feature flagging, and user segmentation. Manage integrations and service\-to\-service communication between a primary Django environment and existing Java\-based integrations, ensuring data consistency and high performance. Proactively use Claude Code and other AI coding assistants to automate documentation, generate unit tests, and refactor code to maintain velocity above traditional engineering benchmarks. Drive the build lifecycle by following through on pull requests, collaborating with mobile engineers to ensure contract alignment, and overseeing automated deployments to cloud environments. Implement and monitor observability tools such as Datadog, New Relic, or Sentry to ensure that rapid experiments do not negatively impact system stability or user experience. Requirements 5\+ years experience in a high\-velocity senior backend engineering experience with an end\-to\-end ownership mindset. 5 \+ strong leadership autonomy with the ability to drive experiments from concept to production. 5\+ years experience in a deep expertise in Python, Django, and Django REST Framework including ORM optimization, middleware customization, and secure authentication patterns. 3\+ years experience as a hands\-on experience with AI\-native development workflows using tools like Claude Code, GitHub Copilot, and Cursor. 5 years experience building scalable APIs for experimentation platforms with A/B testing, feature flagging, and segmentation. 5\+ years experience in a ability to manage service\-to\-service communication in a polyglot environment with Java\-based integrations. 4\+ years of strong understanding of CI/CD pipelines, Docker, Kubernetes, and automated deployment workflows. 4\+ years experience implementing observability and monitoring in production systems. Nice to Have Familiarity with fintech platforms including digital wallets, P2P payments, and PCI\-DSS security requirements. 4\+ experience with event\-driven architectures using Apache Kafka or RabbitMQ. 4\+ years experience in exposure to GraphQL for building flexible front\-end APIs. 4\+ years experience collaborating with ML engineers to integrate personalization or recommendation models. Ability to explain technical trade\-offs to non\-technical stakeholders and align teams under pressure. Benefits 100% remote Long\-term commitment with autonomy and impact High\-velocity experimentation environment with real product ownership Collaborative international team and strong technical culture Clear path to growth within Coderio Why join Coderio? At Coderio, we value talent regardless of location. We are a remote\-first company passionate about technology, collaborative work, and fair compensation. We offer an inclusive, challenging environment with real opportunities for growth. If you are motivated to build solutions with impact, we are waiting for you. Apply now. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.