> Markdown version of [/jobs/ext/2031168-junior-developer](https://www.wearedevelopers.com/jobs/ext/2031168-junior-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Junior Developer - **Company:** Cobalt Recruitment - **Location:** Chelmsford, UK - **Experience:** Starter - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Microsoft Online Services, Corona (Software Development Kit), JSON, Python (Programming Language), Node.Js, Operational Data Store, Standard Sql, SQL Databases, Large Language Models, Zapier, Backend, Git, Nintex, Software Coding, Restful APIs - **Published:** August 12, 2026 - **Apply:** https://eu.experteer.com/career/view-jobs/junior-developer-essex-grossbritannien-58918333 ## About the Role _ Working knowledge of SQL, REST APIs and JSON. * Familiarity with Git and modern development practices. * Ability to solve problems, learn and take ownership of your work. * Right to work in the UK. Key requirements * hybrid working * mentoring from Technology Lead * budget for learning and development ## Description Experteer Overview As a Junior Developer at Cobalt, you'll gain practical exposure to AI and modern software development while supporting day-to-day operations. You'll work closely with the Technology Lead, receiving mentoring and access to production systems from day one. You will build AI agents, automate workflows and develop internal tools to improve business processes. This role combines hands-on coding with data and integrations, offering meaningful impact on operations and learning opportunities. Pay / Benefits * Build and orchestrate AI agents to automate business processes. * Develop APIs, backend services and internal tools using Python and Node.js. * Create automation workflows using Make, Zapier, n8n and LLM-powered tools. * Integrate third-party platforms, APIs and Microsoft 365 services. * Work with SQL and operational data to support automation and reporting. Tasks * Working knowledge of Python and JavaScript / Node.js. * Interest in AI agents, LLMs and automation. * Working knowledge of SQL, REST APIs and JSON. * Familiarity with Git and modern development practices. * Ability to solve problems, learn and take ownership of your work. * Right to work in the UK. Key requirements * hybrid working * mentoring from Technology Lead * budget for learning and development ## Related Videos - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Navigating the Future of Junior Developers in Tech](https://www.wearedevelopers.com/videos/1280-navigating-the-future-of-junior-developers-in-tech) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [Web development best practices in 2021](https://www.wearedevelopers.com/videos/280-web-development-best-practices-in-2021) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk)