Invenergy is seeking a Senior GIS Developer. The qualified and successful front-end web developer will support our geospatial application portfolio. You will take part in all aspects of the software development lifecycle, including design, development, testing, and maintenance of software products. You will primarily develop application experiences using React/Typescript, in addition to backend tools using Python or C#. This position requires a candidate with extensive experience in React, JavaScript, HTML/CSS, and Python, as well as knowledge and skills in gathering requirements, UI/UX, designing application logic and writing documentation. Experience developing with the ArcGIS JavaScript SDK and similar APIs is strongly preferred. A developer divides one’s time between the maintenance of the current software and design of new applications in a collaborative development team. Submitting a portfolio of prior work is strongly encouraged. The position is on-site at Invenergy's headquarters in downtown Chicago, IL.