Top Internships in Jacksonville, FL

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.

Part-time fall internship supporting communications through graphic design, social media content creation, event photography/videography, and administrative organization of media assets. Assist with branded visuals, short-form video and reels, attend community events to capture content, and support general communications projects under the Communications Director.

Support sales team by identifying and generating leads, maintaining CRM lead data, assisting with presentations and proposals, following up with prospects, and helping refine lead generation strategies and processes. Gain hands-on experience in sales and data-driven lead nurturing in a remote, part-time internship.

Support development and testing of software applications, troubleshoot issues with the development team, maintain documentation, attend team meetings, and help optimize application performance and user experience.

Support the business team with data collection, cleaning, analysis, dashboarding, and predictive modeling to measure and improve the internship program and client outcomes. Deliver visualizations, insights, and documentation to inform strategy and operational efficiency while collaborating with cross-functional teams.

Build, test, and deliver process simulation models to identify inefficiencies and recommend optimizations. Analyze and visualize data using Excel/Power BI/Tableau, prepare data with SQL or Python, collaborate with project teams and clients, and present findings to technical and non-technical audiences while managing simulation projects end-to-end.

Support project managers with planning and maintaining project plans, schedules, budgets; organize meetings and documentation; track deliverables; perform research and analysis; maintain project management tools and contribute to team brainstorming in a remote, part-time unpaid internship.

Assist the HR team with sourcing candidates, scheduling and conducting interviews, developing recruiting strategies, providing administrative support, and improving recruitment processes. Part-time, unpaid remote internship (10–30 hrs/week) lasting 180 days.

Remote unpaid legal internship supporting contract drafting and review, legal research, compliance, policy development, meeting participation, and administrative support for a startup-focused legal team. Ideal for JD students or recent graduates seeking practical corporate and contract law experience.

Support HR team in designing and delivering training programs, assist with performance reviews, maintain training materials, identify training needs, evaluate training effectiveness, and contribute to process improvements in a remote internship.

Coordinate and manage new-employee onboarding, conduct orientation sessions, develop onboarding programs, collaborate with HR and departments, support new hires during integration, and improve processes using feedback and best practices.

Create and edit short-form videos, reels, posts, and stories for Instagram, TikTok, YouTube, and LinkedIn. Collaborate with marketing and social teams to develop ideas, follow content trends, and track performance and engagement. Part-time remote internship (10–30 hrs/week) for educational experience, unpaid, 180-day duration.

Remote, unpaid back-end web development internship focused on building and maintaining WordPress sites and web applications. Responsibilities include API integration, server and database management, collaborating with React front-end developers, debugging, and producing technical documentation. Mentorship and hands-on learning provided; part-time (10–30 hrs/week) for approximately 180 days.

Assist in developing and maintaining cross-platform Flutter apps for Android and iOS, implement UI/UX with Flutter widgets, integrate Firebase and REST APIs, debug and optimize performance, and collaborate with the team while staying current with Flutter/Dart technologies.

Work on real-world web applications across frontend and backend. Use modern frontend frameworks (React/Angular/Vue) and backend tech (Node.js, Python, Java, PHP). Integrate RESTful APIs with databases (MongoDB, PostgreSQL, MySQL), debug, test, optimize performance, and collaborate with designers and product teams while gaining hands-on mentorship.

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.

Support CEO and leadership on market intelligence, financial modelling, go-to-market strategy, partnerships and PMO. Run competitor analysis, size segments, build investor-ready business plans, craft value propositions and support partner negotiations while tracking cross-functional OKRs and dashboards.

Perform B2B market and contact research to identify prospective companies and decision-makers, achieve daily lead-generation targets, gather executive contact information using tools and strategies, and support email prospecting and outreach efforts.

Entry-level cybersecurity compliance internship providing hands-on exposure to audits, CMMC compliance reporting, risk and security assessments, GRC artifact management (POA&M, SSP), policy and awareness program development, incident response, and managing GRC toolkits. Interns participate in customer meetings, industry activities, and author technical articles while receiving mentorship and on-the-job training.

Support go-to-market strategy and execution across inbound and outbound channels: define ICPs, join user calls, create Excel demo videos, run outreach using Clay/HeyReach/Instantly, post and measure performance on social platforms, and optimize funnel metrics (visits, conversion, retention, referral).

Remote, full-time six-month paid internship supporting sales operations: engage prospects, coordinate calls, build proposals/quotes, collaborate across engineering and marketing, support pre-sales activities, maintain partner relationships (Microsoft), and develop CRM and customer-service skills.

The QA Intern will support the Product team by testing mobile app features, performing regression testing, validating content, and suggesting UX improvements while maintaining structured documentation.

Remote fall internship assisting with creation, management, and analysis of paid social campaigns across Meta, TikTok, Pinterest, and LinkedIn. Support competitor analysis, copywriting, campaign structure, performance reporting, and trend research. Participate in training, cross-channel learning, and client communication to develop paid social advertising skills.

The Engineering Intern will assist senior engineers in plant operations, maintenance processes, safety program updates, and data analysis for optimization initiatives.

Assist the Reedsy Learning team with community management, outreach to influencers, engaging with students, and promoting courses and events.