Senior Fullstack developer

Jonas Jensen Senior Full Stack developer

*****.**********@*****.*** Copenhagen, DK +453******* Linkedin Over 8 years experience developing scalable and efficient e-commerce, HealthCare, Fintech and AI-powered web applications leveraging React, Python, PHP and SQL. Contributed to increasing user participation and satisfaction through smart and user-friendly UI/UX design. Proficient in using React, TypeScript, Node.js, Laravel, Go, Rust and Django, FastAPI frameworks and has extensive experience building and deploying web applications on the AWS and GCP. Flexible communication skills with technical and non-technical colleagues and strong technical problem-solving skills.

Experience

Senior Full Stack Engineer, DevGrid(Remote) Jun 2022 – Dec 2023 United Kingdom

•Designed and implemented a microservice-based infrastructure using tRPC, Prisma, and Next.js, which enhanced flexibility and scalability.

•Designed and implemented a MongoDB, PostgreSQL database for a web application, leading to increased data storage capacity and improved data retrieval speed..

•Managed Test-Driven Development (TDD) processes and implemented a CI/CD pipeline using GitLab CI/CD.

•Participated in the development of an AI-powered processing system by integrating machine learning algorithms and Large Language Models (LLMs), as well as Retrieval- Augmented Generation (RAG).

•Gained extensive experience in writing and maintaining complex third-party API integrations, particularly with financial APIs such as Open Banking.

•Designed microservices based on Domain-Driven Design (DDD) principles.

•Optimized application performance through code refactoring, caching strategies, and database query optimization, leading to a significant increase in page load speed. Full-stack Developer, ICF of Oklahoma(Remote) Oct 2020 – Apr 2022 Oklahoma, United States

•Developed and deployed a web application on AWS and a healthcare platform, providing medical support and diagnosis to patients through the integration of several third-party APIs.

•Utilized the Context API, Redux, Redux-Saga, and Pure Components, while tailoring React Hooks to enhance data management, thereby promoting scalability and reliability in front- end applications. Employed Webpack and Babel on Linux for optimized development.

•Developed a RESTful API that enhanced web application performance, resulting in a reduction of average response time

•Developed unit, integration, and end-to-end (E2E) test cases using Jest, Mocha, Cypress, among other tools.

•Wrote and optimized SQL queries for data retrieval and manipulation, significantly reducing query execution time and improving overall application performance. Full Stack Developer, LEAWARE Apr 2017 – Sep 2020

Copenhagen, Denmark

•Create web-based interfaces and re-usable interface components with Typescript and React, Vue.

•Collaborated with a team of designers and product owners to implement security measures that protected the web application from potential threats and vulnerabilities.

•Develop and maintain back-end services and APIs using NestJS (Node.js) and Python Flask.

•Developed and maintained a web application using React and Node.js.

•Collaborate with cross-functional teams to identify and develop software solutions that meet business requirements in agile environment.

•Implemented Search Engine Optimization(SEO) by using Next.js and Python Django

•Work with the best and brightest on a global cutting-edge SaaS product Web Developer, Freelance Aug 2016 – Mar 2017

•Design, develop and implement web to support business requirements and projects using PHP, Laravel framework, utilizing MySQL and PostgreSQL for data storage and React for Single Page Applications

•Built a real-time chat application, Healthcare, Education using PHP, Laravel, Symfony, MVC and WebSockets, providing users with a seamless communication experience and increasing user engagement.

Education

DTU - Technical University of Denmark,

Bachelor's degree, Computer Science

Sep 2013 – Jun 2016

Copenhagen, Denmark

Skills

Frontend — HTML, CSS, JavaScript, TypeScript, React, Vue, Next.js, Bootstrap, Figma, MUI, Styled-component, Chakra UI, Tailwind CSS

Backend — Node.js, Express.js, Nest.js, PHP, Laravel, Python, Django, FastAPI, Flask Databases — MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch, TypeORM Testing — Jest, Mocha, PHPUnit, Codeception, Cypress DevOps — RESTful API, GraphQL, AWS, GCP, Docker. Kubernetes, Git, GitHub, GitLab, Jira, Microservices

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