Senior Fullstack Engineer

Kavaliro is seeking a Senior Full Stack Developer for our local Jacksonville client. n this role, you’ll serve as a key contributor across the full product lifecycle, with a strong emphasis on backend architecture and development. This is a fast-paced, hands-on position suited for an experienced full stack engineer who enjoys tackling complex systems, working at scale, and shaping technical direction.

• Design and implement cloud-based architecture in Microsoft Azure to support high-volume simulation workloads running in fully automated, background batch processing environments.
• Develop and maintain simulation software across the stack, with a primary focus on backend systems using C#/.NET Core, C++, and Python.
• Build and manage integrations with multiple external systems through APIs and data pipelines.
• Debug, troubleshoot, and optimize complex codebases using Microsoft Visual Studio.
• Design and maintain data storage solutions, including SQL databases, No
  
  SQL systems, and data lakes, to support large and complex datasets.
• Participate in system installation, testing, validation, and issue resolution alongside internal teams and clients.
• Deliver software updates and support deployment and validation efforts in production environments.
• Provide technical guidance and leadership to engineers and technicians assigned to your projects.
• Identify opportunities to improve performance, scalability, and overall development efficiency.

• 3+years of professional experience in full stack software development, with a strong emphasis on backend engineering.
• Bachelor’s degree in Computer Science or a related technical field, plus 3+years of hands‑on engineering experience.
• At least 2+ years of experience designing and implementing Azure-based enterprise applications, including batch processing, queue management, and parallel execution at scale.
• Proven experience leading or driving software architecture initiatives from planning through delivery and operational support.
• Hands‑on experience designing and tuning databases (SQL, No
  
  SQL, and/or data lakes) to support large, performance‑sensitive datasets.
• Experience designing, consuming, and integrating RESTful APIs, including complex JSON-based data structures and build pipelines that ingest data from multiple external sources.
• Strong object‑oriented programming skills and a disciplined approach to debugging and problem solving.
• Clear, effective communication skills and the ability to collaborate across teams.
• Self‑directed, highly motivated, and comfortable working independently.
• Fast learner with a curiosity for new tools, technologies, and domains.
• Creative problem solver who’s comfortable challenging existing approaches.
• Authorization to work in the United States.

• Proficiency with C#/.NET Core, C++, Python, and batch scripting.
• Strong background in API and web service integration.
• Familiarity with GIS data or spatial data systems.
• Experience generating reports, both scheduled and on-demand.
• Experience using Kanban‑style project management tools such as Jira or Trello.
• Ability to juggle multiple priorities in a fast‑moving environment.
• Strong written and verbal technical communication skills in English.
• Exposure to modeling and simulation concepts or experience within the railway industry.
• Demonstrated team leadership or mentorship experience, with a desire to help others grow.
• Confidence navigating large, complex, and legacy codebases.
• Working knowledge of applied engineering math concepts such as force, acceleration, friction, momentum, and power.

Kavaliro provides Equal Employment Opportunities to all employees and applicants. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Kavaliro is committed to the full inclusion of all qualified individuals.

In keeping with our commitment, Kavaliro will take the steps to assure that people with disabilities are provided reasonable accommodations. Accordingly, if reasonable accommodation is required to fully participate in the job application or interview process, to perform the essential functions of the position, and/or to receive all other benefits and privileges of employment, please respond to this posting to connect with a company representative.