Senior Ruby on Rails Developer

Department:

Associate (freelance/contract roles)Employment Type:

ContractLocation:

London, UKDescription

Only apply if you are based in the UK and have the right to work in the UK.Start date:

ASAP (immediate)Contract length:

3 months initially (rolling contract)Ways of working:

Majority remote working (must be based in the UK) with occasional travel to client site in London about once a monthIR35 status:

Outside - competitive day rate depending on experience will be discussed during screening call.We are looking for 2 x Senior Ruby on Rails Developer to work on a complex but interesting government project.In this role, you will play a key role in designing, building, and maintaining scalable web applications that serve our growing user base. As a senior developer, you will also guide technical decisions, mentor junior developers, and ensure that best practices are followed across the team.Key Responsibilities

Design, develop, test, and maintain web applications using Ruby on RailsCollaborate with product managers, designers, and other engineers to deliver high-quality solutionsBe involved in architectural discussions and contribute to technical strategyReview code, provide constructive feedback, and ensure coding standards are upheldOptimise applications for performance, scalability, and securityIntegrate with third-party services and APIs as requiredWrite and maintain automated tests to ensure code reliabilityContribute to continuous improvement in development processes and toolsSkills, Knowledge and Expertise

5+ years of professional software development experienceAt least 3 years in Ruby on Rails experience (a must)Strong understanding of software design patterns, object-oriented principles, and RESTful APIsExperience with relational databases (PostgreSQL) and database optimisationProficiency with front-end technologies such as HTML, CSS, JavaScriptFamiliarity with background job processing (Sidekiq or similar)Experience with cloud hosting platforms (AWS, Heroku, GCP, or similar)Strong understanding of testing frameworks (RSpec, Minitest, Capybara etc)Familiarity with CI/CD pipelines and DevOps practicesExcellent problem-solving skills and ability to debug complex issuesStrong communication skills and ability to collaborate across teamDesirable (plus to have but not essential)

Experience working on government/public sector projectsExperience with ML/AI services and exposure to Python projectsExposure to microservices or service-oriented architecturesFamiliarity with monitoring tools (New Relic, Datadog or similar)About us

We\''re Transform.Transform is a fresh alternative to Big Consulting. As an end-to-end transformation partner, we define, design, build and operate systems that solve our clients’ toughest challenges and seize their biggest opportunities. That often means combining strategy, data, AI, technology, and change management. Sometimes we manage and operate the systems we create; other times, we hand it over for the client to run – standing by to make improvements when things change. It all comes down to making an impact: improving lives, supporting citizens, streamlining workflows, and making the world a better place.We specialise in public sector and public-facing organisations—from government agencies and local authorities to energy, utilities, transportation and healthcare. We also work for some of the world’s most dynamic brands across automotive, retail, financial services, and consumer goods.In 2024, Transform acquired Cadence Innova, the UK’s leading public sector change consultancy. The result is a fresh kind of partner: together, we’re able to deliver change from the very first ideas through to deployment—building on our deep relationships at every level of government.We\''re part of the Next 15 group, a multi-national organisation spanning over 25 brands. We combine the financial robustness and breadth of services of a large organisation, with the nimbleness and innovation of a smaller brand.If you are keen to help us build the workforce of the future, we should talk.We’re all in! That\''s what gets us out of bed every day. We hope you feel the same.At Transform we believe in a culture of inclusivity, we celebrate difference and believe that diversity makes our business more relevant, our work more meaningful and our people more empowered. We’re committed to equality of opportunity for all, and we actively seek applications from all ethnicities, orientations, beliefs, gender identities + those with neurodiverse traits and disabilities. We want you to have the best opportunity to show us who you are and what you can do. Please do let us know if you need any adjustments now or at any point in the recruitment process.If this sounds like you, please get in touch to discuss in more detail.Use of AI in CV and InterviewsWhile we are a technology company and promote using AI the right and ethical way, we value authenticity and transparency in our hiring process. To ensure fairness and accuracy in assessing your skills and experience, we kindly request that you refrain from using AI-assisted tools to generate answers during interviews or enhancing your CV.We are looking for genuine insights into your abilities, experiences, and personality. Any misrepresentation through AI-generated content may impact our ability to make an informed decision. We look forward to getting to know the real you!

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