Senior Distributed Systems Engineer - Platform Engineering

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 126 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com. Reddit has a flexible workforce! If you happen to live close to one of our physical office locations our doors are open for you to come into the office as often as you'd like. Don't live near one of our offices? No worries: You can apply to work remotely in any country in which we have a physical presence Team Overview We are building the next generation of ML research tools and agentic AI platforms that power machine learning development across Reddit. Our mission is to accelerate the Ads ML lifecycle – from experimentation and training to deployment, evaluation, and autonomous operations – through scalable platform services, intelligent automation, and developer-centric tooling. Our team owns critical platform capabilities including offline ML experimentation systems, production training orchestration frameworks, ML lifecycle automation and, agentic ML frameworks that enable faster model iterations. We are looking for an experienced engineer with deep expertise in large-scale distributed systems, ML platforms, and emerging agentic architectures to help define and build the foundational tooling for the next generation of our machine learning devX tooling. What You’ll Do * Design and build large-scale offline ML experimentation platforms that enable reproducible research, model development, evaluation, and promotion workflows. * Develop production-grade training orchestration frameworks supporting distributed training, hyperparameter optimization, model evaluation, and automated retraining. * Build infrastructure for experiment tracking, metadata management, lineage, artifact versioning, model registries, and reproducibility. * Partner with ML engineers and researchers to improve experimentation velocity and operational efficiency. * Build automated workflows for model promotion, rollback, compliance validation, and continuous evaluation. * Design and build an agentic AI execution platform supporting autonomous and human-in-the-loop workflows, including multi-agent orchestration, memory/context systems, and scalable workflow infrastructure. What You Bring * 5+ years in infrastructure/platform engineering or large-scale distributed systems. * 2+ years of hands-on experience building and operating production ML infrastructure, developer SDKs, platform APIs, or self-service AI tooling. * Experience building workflow orchestration systems, developer platforms, or large-scale automation frameworks. * Experience with distributed data processing systems such as Spark, Flink, Ray, or equivalent technologies. * Experience with modern orchestration and workflow technologies such as Kubeflow, Argo, Airflow, or similar frameworks. * Experience building offline ML experimentation platforms, model registries, experiment tracking systems, or training orchestration frameworks. * Experience building and operating agentic AI systems, including multi-agent orchestration, autonomous workflows, and agent communication/runtime frameworks (e.g., MCP, A2A, and orchestration systems) is a strong plus * Experience running end-to-end model development and iteration cycles at scale is a plus Pay Transparency: This job posting may span more than one career level. In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, and parental leave. To learn more, please visit https://www.redditinc.com/careers/. To provide greater transparency to candidates, we share base salary ranges for all US-based job postings regardless of state. We set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant licenses/credentials, and may vary from the amounts listed below. The base salary range for this position is: $216,700—$303,400 USD In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews. During the interview, we will collect the following categories of personal information: Identifiers, Professional and Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you choose to share with us. We will use this information to evaluate your application for employment or an independent contractor role, as applicable.  We will not sell your personal information or disclose it to any third party for their marketing purposes.  We will delete any recording of your interview promptly after making a hiring decision.  For more information about how we will handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential Employees and Contractors. Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve.  Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview process, please let your recruiter know.

Description Conexiom is transforming how manufacturers and distributors process critical business documents. Our AI-powered platform automates the conversion of unstructured orders and other commercial documents into accurate, validated, ERP-ready transactions. Today, Conexiom processes more than one billion order line items annually and combines advanced AI, deterministic validation, deep ERP integrations, and enterprise-grade automation to help customers eliminate manual work and improve customer experiences. As we evolve into an order automation platform company, we are modernizing our architecture to create a more scalable, extensible, and developer-friendly foundation for the future. About the Opportunity: We are looking for an exceptional Principal Engineer to help lead the architectural transformation of Conexiom's platform. This is not a traditional individual contributor role. You will serve as one of the company's most senior technical leaders, helping define the future architecture of our platform while influencing engineering, product, data, AI, and infrastructure decisions across the organization. You will partner closely with executive leadership, engineering teams, product management, and reliability engineering to evolve our architecture from a collection of successful products into a unified, modern platform. This includes driving API-first design, cloud-native architecture, AI enablement, platform scalability, developer productivity, and operational excellence. What you’ll do Lead Architectural Transformation: Define and champion Conexiom's long-term technical architecture vision. Drive modernization initiatives across applications, services, integrations, data, and infrastructure. Establish architectural principles, standards, and governance processes. Lead architecture reviews and guide critical technology decisions. Create reference architectures that enable scale, resiliency, extensibility, and rapid innovation. Accelerate Platform Unification Help evolve Conexiom toward a unified platform architecture. Drive modernization initiatives around containerization, service boundaries, shared platform capabilities, developer tooling, and common services. Improve consistency across user experiences, integrations, APIs, observability, and operational workflows. Champion Engineering Excellence Mentor senior engineers, staff engineers, architects, and engineering leaders. Raise the technical bar across the organization through coaching, reviews, and standards. Improve software quality, reliability, security, and performance. Promote modern engineering practices including DevSecOps, platform engineering, observability, and automated testing. Enable Business Growth Collaborate directly with customers, partners, and strategic prospects on architecture discussions. Support enterprise-scale integrations with ERP, CRM, eCommerce, and partner ecosystems. Evaluate emerging technologies and lead proof-of-concepts where appropriate. Balance innovation with practical business outcomes. What Success Looks Like Within your first 12–18 months you will: Establish a clear architectural north star for the company. Accelerate migration toward a modern cloud-native platform. Improve engineering velocity through platform simplification and developer enablement. Increase platform scalability, reliability, and operational efficiency. Help position Conexiom as the leading AI-powered commerce automation platform in the industry. Develop the next generation of technical leaders across the engineering organization. What We're Looking For Required Experience 15+ years of software engineering experience building large-scale SaaS platforms. 5+ years operating at Staff, Principal, Distinguished Engineer, or equivalent architecture leadership level. Deep expertise in distributed systems, platform architecture, cloud-native development, and software modernization. Proven success leading architectural transformations in complex production environments. Strong experience with public cloud platforms. Expertise in APIs, event-driven architectures, distributed messaging, microservices, and modern integration patterns. Experience operating highly available, mission-critical systems at scale. Strong understanding of software delivery, DevOps, CI/CD, and cloud operations. Exceptional communication and influence skills. Ideal Experience Experience modernizing monolithic applications into modular platform architectures. Experience with AI/ML platforms, LLM integrations, agent frameworks, and AI-powered products. Experience building platforms that integrate deeply with ERP ecosystems such as SAP, Epicor, Infor, Oracle, Microsoft Dynamics, or Salesforce. Experience with containerization, Kubernetes, platform engineering, and developer experience tooling. Experience leading architecture in growth-stage SaaS organizations. Leadership Characteristics Thinks in years, not sprints. Balances pragmatism with visionary thinking. Earns influence through technical credibility rather than authority. Simplifies complexity. Obsesses over customer outcomes. Uses AI as a force multiplier for both engineering teams and customers. Raises the capability of everyone around them. Thrives in environments undergoing significant transformation. Why Conexiom Why This Role Matters Conexiom is at an inflection point. We have proven scale, deep domain expertise, and an industry-leading AI foundation. The next phase of growth requires a platform that is more open, extensible, intelligent, and scalable than ever before. This role will directly influence the technical direction of the company and help define what the next generation of AI-powered commerce automation looks like. Impactful Work You won't be maintaining the status quo here. Conexiom is actively changing how manufacturers and distributors operate at scale — eliminating the manual, error-prone processes that slow businesses down and cost real money. The work you do has a direct line to outcomes customers can measure, and teams you'll never meet will work better because of it. Real Growth, Not Just a Title We're on a rapid growth trajectory, which means the opportunities you create here are yours to own. High performers don't wait for a seat at the table — they build one. If you're someone who runs toward complexity and wants your contributions to shape the direction of a scaling company, you'll find room to grow. A Culture That Actually Includes You Inclusive culture isn't a talking point for us — it's something we actively build. That means hiring for diverse perspectives, creating space for candid conversations, and holding ourselves accountable to an environment where different backgrounds and ways of thinking make the work better. We're not perfect, but we're committed. Conexiom is an equal opportunity employer. We believe the best teams are built from diverse perspectives, backgrounds, and experiences — and we're committed to creating an environment where everyone can do their best work. If you don't meet every qualification listed, apply anyway. We hire for skills, experiences, and accomplishments — not where you've been, but what you've done. If you require accommodations at any point during the recruitment process, please reach out to our People team at [email protected] . We're happy to help.