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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Fullstack Engineer - **Company:** PLANS RUNNER, INC. - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Flutter, Artificial Intelligence, Amazon Web Services, Amazon S3, Application Performance Management, Automation of Tests, Continuous Delivery, Continuous Integration, Software Debugging, Github, Monitoring of Systems, PostgreSQL, Prometheus, Software Engineering, Web Applications, Data Logging, ReactJS, Delivery Pipeline, Grafana, Backend, Gitlab-ci, Information Technology, Front End Software Development, Terraform, Docker, Elk Stack - **Published:** September 27, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pmvzue3krw ## About the Role * Degree in Computer Science or related developer education (e.g. a reputable coding bootcamp) or equivalent practical experience. * 7+ years' experience designing, developing, shipping and maintaining backend applications and front-end web applications, including operating at senior level. * Familiarity with monitoring and logging tools like Prometheus, Grafana, or the ELK stack. * Significant experience using agentic coding tools * Experienced in designing, building and maintaining automated tests and contributing to CI pipelines. * Has worked with other developers in an agile set-up(e.g. sprints, stand-ups, retros). * Experienced in debugging and fixing live incidents in time-pressured situations, and in improving systems/processes to prevent recurrences. * Experience of working with continuous deployment pipelines (you don't have to build everything yourself, but should be comfortable working within and improving such setups). * Strong understanding of industry trends and development best practices- especially regarding security, application performance and scalability. * Has a strong sense of ownership, attention to detail and the ability to work independently with a team-oriented work ethic. * Strong communication skills for effective teamwork and collaboration, and confidence interacting with customers and partners in a technical leadership capacity. * Is proactive, initiates improvements, and offers assistance even without being asked. * Comfortable in using AI code development tooling * Right to work in the UK Nice to have's; * Experience in B2B SaaS, ideally in fintech, wealth tech or other regulated industries. * Experience integrating with CRM systems and/or financial platforms. * Exposure to observability and monitoring tools (e.g. logging, metrics, tracing). Our Tech Stack ## Description We're now looking for a strong generalist Senior Full-Stack Engineer to bridge PlannerPals application development with a strong background in building out solutions and delivering it as production ready PRs AI tooling is not the job. LangChain, Pydantic, RAG, "built agents" can be learnt as part of the job. The job is focussed on engineering judgement, taste, data, and not silently introducing a security vulnerability. You will focus on: * Designing and building key features of our solutions * Development and design of CI/CD pipelines, including Infrastructure as a Code and the enablement of developers * Building and deploying AI agents to production. * Ensure that coding and testing standards are upheld This is a fully UK Remote role and offers the opportunity to work closely with the founders at a defining stage in our growth. Responsibilities; Solution design; * Own the end-to-end solution design for new features within a defined architecture framework * Make pragmatic decisions about trade-offs (scope, performance, scalability, security) in a fast-moving environment. Hands-on development; * Take ownership of complex or high-impact pieces of work, especially where the architecture, integrations or performance considerations are non-trivial. * Design, build and optimise the journeys of our service using our tech stack: * Backend: Python * Frontend: React + Flutter * Data / Infra: Postgres, AWS ( S3, ECS etc.) * Write high-quality, testable code and contribute to our continuous integration and deployment pipelines. Infrastructure development; * Design and optimise reliable CI/CD pipelines, resilience, observability and security within AWS (i.e. CDK, Terraform) utilising workflows such as Github Actions, GitLab CI for example * Manage AWS resources and containerised applications deployments via Docker * Build and maintain a scalable infrastructure utilising Terraform (CDK within AWS) Technical ownership & continuous improvement; * Help evolve our platform architecture for performance, resilience, observability and security as we scale. * Identify and drive improvements to developer experience, tooling and internal processes (e.g. testing, release, monitoring, on-call), in collaboration with both in-house and outsourced engineers. ## Related Videos - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Flutter Packages and Plugins - A Look Under the Hood](https://www.wearedevelopers.com/videos/555-flutter-packages-and-plugins-a-look-under-the-hood) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [Crew Management System for Airlines: Plan duties for pilots & flight attendants worldwide](https://www.wearedevelopers.com/videos/1444-crew-management-system-for-airlines-plan-duties-for-pilots-flight-attendants-worldwide) ## Related Articles - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)