Top Internships in St. Louis, MO

Remote unpaid 20-hr/week graphic design internship supporting marketing: create social, presentation, web, and multimedia assets; maintain brand consistency; iterate on designs; collaborate with teams; learn design and digital marketing best practices.

Supports G2 Marketing’s AI fluency initiative by developing AI adoption deep-dives, diagnosing team readiness, tracking progress, maintaining assessment tools and dashboards, supporting cross-team workflows, building training materials, and documenting playbooks. The intern analyzes assessment data, validates use cases, coordinates curriculum rollout, gathers feedback, and helps marketing teams embed AI into daily workflows.

Build and deploy production AI agents for real customers. Responsibilities include orchestrating LLM pipelines, integrating APIs and tools, developing React interfaces, implementing RAG and document-processing systems, deploying serverless applications, and monitoring performance. The role requires strong Python or JavaScript skills, hands-on OpenAI and multimodal LLM experience, vector databases, agent frameworks, function calling, and full-stack integration. Applicants must be pursuing a Master's or PhD in a technical field.

Support the sales team by identifying leads, conducting market research, preparing sales materials and proposals, participating in meetings and presentations, and collaborating with cross-functional teams to help drive business development and ensure client satisfaction.

Support the sales team by researching markets, identifying B2B opportunities, preparing sales materials and proposals, attending meetings, and collaborating with cross-functional teams to help drive client satisfaction and business development.

Support international B2B sales through lead generation, prospect qualification, outreach, CRM data hygiene, sales material preparation, market research, pipeline tracking, and cross-team collaboration while learning sales processes.

Product Management Intern responsible for discovering patient, clinician, and care-team needs; translating ambiguous problems into product requirements, workflows, and success metrics; and partnering with engineering, design, clinical, and operations teams to prototype, launch, and iterate AI-powered healthcare experiences. The intern will own a defined product initiative from discovery through iteration, contribute to mock prototypes and code, and support activities such as patient-call shadowing and care-team training.

Research and prototype transformer-based and graph-based foundation models using customer, transaction, and merchant data. The intern will design and train models, run rigorous experiments, evaluate results, and develop working prototypes. Responsibilities include collaborating with Product, Engineering, Analytics, and Applied Science teams to improve customer experience, operational efficiency, and business outcomes.

Software Engineer Intern contributing to SingleStore’s distributed SQL database. Responsibilities include developing and testing database features, query processing, storage engines, indexing, distributed systems, concurrency, performance, scalability, and fault tolerance. The role involves code reviews, technical design, debugging, documentation, and collaboration with engineering and product teams.

Software Engineer Intern contributing to cloud-native database services, including workspace lifecycle management, provisioning, scaling, backups, APIs, reliability, observability, testing, and production deployment. The role involves distributed systems, cloud infrastructure, backend development, debugging, code reviews, and collaboration with engineering and product teams.

Supports the CIH Marketing team with trade show and event coordination, retailer and distributor marketing requests, newsletters, marketing asset inventories, expense tracking, and project planning. The intern gathers information, coordinates stakeholders, manages deadlines, and helps execute trade marketing initiatives remotely, with potential travel to Ripon, Wisconsin.

Support the sales team by conducting cold calls, generating leads, assisting with sales strategies, handling administrative tasks, maintaining customer databases/CRM, and collaborating to meet sales targets while gaining hands-on experience.

Summer supply chain internship supporting logistics, rail and truck transportation, warehousing, carrier coordination, rate analysis, shipment troubleshooting, contracts, invoicing, settlements, and accounts payable. The role uses transportation and warehouse management systems while collaborating with operations, sales, carriers, and third-party logistics partners.

Summer internship supporting financial planning and investment management for high- and ultra-high-net-worth families. Responsibilities include learning financial planning processes, reviewing complex portfolios, preparing quarterly reports, interpreting trading recommendations, supporting client management operations, and participating in professional events. Interns work full time in the office and receive mentorship while developing analytical, communication, and client-service skills.

Participate in the full software development lifecycle for high-performance, low-latency financial data processing applications. Responsibilities include software design, development, testing, secure coding, version control, adopting new technologies, and completing projects collaboratively. The intern will work with Python, C, C++, Linux, GitLab, Jenkins, Artifactory, Jira, Agile, and CI/CD practices in a hybrid St. Louis environment.

Supports procurement, claims, and transitions teams with record and database maintenance, operational documentation, management reports, process recommendations, and general departmental tasks. The internship provides hands-on commercial real estate experience, mentorship, professional development, and exposure to operational functions. Candidates must be pursuing a relevant bachelor's or master's degree, have strong Microsoft Office skills, and demonstrate organization, communication, and teamwork.

Supports aerospace engineering projects through technical documentation, research, data gathering, CAD drawing creation, simulations, analysis, project scheduling, quality inspections, and technical reviews. Provides administrative and technical documentation support while collaborating with engineering teams. Requires current enrollment in an aerospace, mechanical, or related engineering degree program, strong academics, CAD familiarity, analytical ability, teamwork, and communication skills.

Supports technical employees with basic engineering tasks under direct supervision. Contributes to projects, maintains documentation and records, organizes engineering drawings and maps, collects and codes data, and reviews records for revisions. The role is intended for an undergraduate student pursuing a technical degree and requires teamwork, communication, attentiveness, and the ability to follow directions.

Supports mechanical engineering projects for pharmaceutical, biotech, food and beverage, and industrial process facilities. Develops calculations, reports, construction drawings, specifications, and conceptual designs under mentorship. Coordinates with multidisciplinary teams, vendors, clients, contractors, and regulatory standards. The role emphasizes HVAC systems and may involve AutoCAD, Revit, Navisworks, BIM360 Suite, and Assemble.

Process Engineer Interns support the design and engineering of pharmaceutical, biotech, food and beverage, and industrial manufacturing facilities, equipment, infrastructure, and utility systems. Working under a mentor, they develop project deliverables, document process design scopes, collaborate across disciplines, and contribute to renovations and new construction projects. The role requires pursuing an engineering degree, full-time summer availability, strong analytical and communication skills, and willingness to relocate to an internship location.

Work with the development team to build and debug web applications: write Python backend code, create responsive HTML/CSS/JavaScript frontends, integrate frontend and backend, participate in code reviews and testing, learn frameworks and document progress.

Assist in designing and building full-stack web applications using the MERN stack. Work on frontend (React) and backend (Node/Express), create responsive UIs, develop RESTful APIs, manage MongoDB databases, debug and optimize applications, collaborate in code reviews and agile sprints, and stay current with web development trends.

Support mechanical engineering team in CAD modeling, FEA, tolerance analysis, and prototype validation for rack- and row-based data center infrastructure. Create manufacturing-ready drawings, support BOM and lab testing, and collaborate with cross-functional teams throughout new product development.

Supports enterprise AI transformation through machine learning, generative AI, data science, retrieval-augmented generation, and workflow automation. Responsibilities include data preparation, feature engineering, model development and evaluation, monitoring, dashboard and documentation creation, and secure AI application development. The intern collaborates with IT, AI transformation teams, data stewards, and business stakeholders to deliver practical AI and analytics solutions while following security, privacy, and responsible AI requirements.

Supports pharmacists and healthcare providers in chronic care and remote patient monitoring programs. Responsibilities include patient engagement calls, medication reconciliation, chart preparation, care plan documentation, EHR updates, task coordination, compliance tracking, and collaboration with clinical teams. The intern also assists with administrative duties, follows CCM and RPM regulations, documents patient interactions, and participates in professional development and care conferences.