Mid-Level .NET Developer

We’re looking for a Developer who can turn complex technical challenges into clear, maintainable solutions. At true, we help organisations solve complex problems through thoughtful, well-executed digital products. As a Midweight .Net Developer, you’ll be a trusted part of true’s Engineering team, helping us design, build, test and deploy thoughtful, robust digital products for our clients. This isn’t a role for someone who only wants to pick up tickets and ship code in isolation. It’s about understanding the problem, choosing the right technical approach, writing maintainable code, and contributing to the quality and reliability of the solutions we deliver. Why this role exists? We’re growing, and with that comes more ambitious, more complex client work. We need someone who can: Help us deliver well-structured, maintainable CMS solutions (Optimizely and Umbraco)Support the team across planning, scoping, build, testing and deploymentBring sound judgement to technical decisions, balancing quality, scalability and cost-effectiveness You’ll work across client projects and retainers, collaborating with Lead Engineers, Front-end developers, Project managers, QA and wider agency teams to build solutions that are useful, stable and easy to evolve. What you’ll be doing Development & technical delivery Write reusable, well-considered, maintainable and extensible code across Optimizely/Umbraco CMS and associated .NET applicationsSupport the development of Optimizely/Umbraco CMS builds, upgrades, integrations and ongoing platform improvementsWork with Lead Engineers to turn requirements into clear development tasks and pragmatic technical solutionsContribute to content modelling, CMS configuration, templates, components and editor-friendly functionalitySupport integrations with APIs, third-party systems and Front-end applications, including headless or composable approaches where relevantHelp ensure our technical output is secure, performant, accessible and reliable Planning, estimation & quality Accurately estimate pieces of work and use learnings from previous projects to improve estimates over timeBreak technical work down clearly so it can be understood, planned and delivered by the wider teamWrite and maintain clear, concise documentation for Developers, QA and project teams to followReview, test and refine your own work before handover, helping reduce rework and protect qualityRaise technical risks, assumptions and dependencies early, with enough context for others to make informed decisions Optimizely/Umbraco platform development Develop and customise CMS features using .NET, C# and ASP.NET CoreWork with content types, page types, blocks, media, permissions and editor workflowsSupport CMS builds and upgrades, including modern .NET approaches where appropriateContribute to headless or hybrid implementations using content delivery APIs, Optimizely Graph or similar approaches where requiredKeep the content editor experience in mind, making sure technical solutions are usable for the people managing the site day to day Collaboration & execution Work closely with the CTO and Lead Engineers to deliver high-quality solutionsCollaborate with Front-end developers to connect CMS functionality with responsive, accessible Front-end experiencesPartner with QA to support testing, bug fixing, regression checks and release readinessSupport project and account teams by explaining technical options clearly and contributing to scoping conversationsWork with IT or hosting partners where infrastructure, deployment or environment questions need technical inputContribute to delivery ceremonies, stand-ups, reviews and retrospectives with a practical, solutions-focused mindset Continuous improvement Bring new ideas and process improvements to the teamShare learnings from projects so we keep improving how we build, maintain and support CMS platformsStay curious about new technologies, platform updates and development practices that could improve our workContribute to reusable patterns, documentation and standards across the development teamHelp create a culture where code quality, maintainability and thoughtful technical decision-making matter What success looks like Solutions are well-structured, maintainable and easy for clients to manageYour work is delivered to a high standard, with clear communication around progress, risks and dependenciesTechnical decisions are pragmatic, proportionate and aligned to client needsYou contribute positively to planning, estimation, documentation and continuous improvementThe team trusts you to take ownership of defined areas of work and follow them through carefully What we’re looking for Experience Commercial experience building and maintaining digital products, websites or platforms using .NET and C#Hands-on experience with Optimizely CMS, ideally including CMS 12, content types, blocks, templates and editor workflowsHands-on experience with Umbraco CMS and appsExperience working with APIs, integrations and structured content modelsStrong understanding of HTML, CSS and JavaScript, with confidence working alongside Front-end developersAgency or fast-paced delivery environment experience would be a bonus Capability Good working knowledge of .NET, C#, ASP.NET Core and modern development practicesAble to write clean, reusable and maintainable codeComfortable working with source control, code reviews, branching and deployment processesAble to estimate work, communicate progress and raise risks clearlyUnderstands performance, security, accessibility and browser/device compatibility considerationsExperience with modern Front-end tooling or frameworks such as Vue, NuxtJS, React, NPM, webpack or ESLint would be useful Approach Proactive, thoughtful and solutions-focusedComfortable asking good questions and navigating ambiguityStrong attention to detail without losing sight of the wider client or user needKeen to learn, improve and contribute to the wider development team You’ll thrive here if you… Enjoy turning technical complexity into clear, workable solutionsLike working closely with Developers, QA, project teams and wider agency specialistsCare about the experience of both end users and content editorsTake ownership of your work and follow things through properlyWant to deepen your Optimizely/Umbraco expertise while contributing to real client projects What you’ll get Growth & development Real responsibility from day one, with support from experienced Developers, Lead Engineers and the CTOA clear path to grow your Optimizely/Umbraco, .NET and wider technical capability over timeContinuous learning through real project experience Flexibility & ways of working Bristol based with a hybrid working modelCore hours with flexibility around how you structure your day Health wellbeing Private healthcare (including mental health support)Wellbeing initiatives and Active Teams programme Financial & security Competitive SalaryPension with employer contributionsLife assurance cover Culture & environment Regular team socials and eventsMonthly agency meetupsSupportive, collaborative team culture25 days holiday a year Ready to apply? If you’re someone who takes pride in thoughtful development, enjoys solving technical problems, and wants to keep building your expertise in a collaborative agency team, we’d love to hear from you. Role: Midweight .Net Developer Reporting to: Lead Engineer Location: Bristol