Backend Developer

you'll be doingDesigning and architecting scalable, high-performance applications Leading development of complex features and new systems Making key technical decisions and establishing backend best practices Optimising performance across databases, caching and application layers Improving API performance and overall application speed Implementing robust security practices (authentication, authorisation, vulnerability prevention) Conducting deep troubleshooting and resolving critical issues Mentoring developers through code reviews, guidance and knowledge-sharing Collaborating with Product, Frontend and DevOps teams to align solutions with business goals Supporting estimation, planning and development workflows Ensuring strong test coverage and stable production releases What we're looking forYou're a highly capable backend developer who combines deep technical expertise with strong ownership and leadership. You're comfortable guiding decisions, improving standards, and supporting others', Role/Job title:Senior Full Stack Developer - Mode of working London-3 days onsite - Type of Employment-Permanent The Role As aSenior Full Stack Developer, you will design and deliver end-to-end application solutions using cloud platforms such as Azure, AWS or GCP,..., About the Role Our client is seeking aSenior Backend Developerto join their Retail Development team. You'll design and build scalable Java microservices, mentor engineers, and help shape the future of retail systems kiosks. This is a hands-on role focused on technical..., Leeds based - hybrid working - 3 days onsiteResponsibilitiesBuild and maintain backend services and APIs in line with existing architectural patterns and standards.Implement business logic, data access layers, and integrations with internal and external systems.Develop and..., Role: Frontend Developer Start Date: ASAP Contract Length: 6 months (extensions available) Work Location: Remote, with ad-hoc, expenses paid travel to office IR35 Status: Inside IR35 Industry: Government Interview Process: MS Teams, 1-2 Stage, Technical Interview..., Senior Backend Engineer, Java, Kotlin, AWS | Fintech, Payments Platform (B2B) | Leeds, Hybrid (2 days per week) | Salary Up to £85,000+ Bonus & Benefits The Company We are working with an international Fintech Start-Up in the payments space who are completely changing the..., Job Title: Senior Backend Developer Location: Leeds ( 1- day onsite per week) Duration: 6 Months Description: About the Role Join our US Product Development team, where we build innovative retail systems for Sportsbooks and hotel check-in kiosks across the US. As a senior..., A leading resource management firm in Leeds is seeking an experienced backend developer to build and maintain services and APIs. The role requires strong Python skills and experience in REST API development. You will work in a hybrid environment, collaborating with onshore...

growth. You'll likely have: 5+ years' experience in backend development Deep expertise in PHP and Symfony (including modern Symfony versions) Strong understanding of Symfony components, architecture and best practices Advanced SQL and Doctrine ORM knowledge Experience with performance optimisation, caching and scalable systems Solid testing practices (PHPUnit, TDD mindset) Experience designing scalable, maintainable architectures Confidence mentoring and reviewing others' code Nice to have: Experience with API Platform Familiarity with Redis, Elasticsearch or other NoSQL tools Experience with event-driven or asynchronous architectures Some frontend awareness (React / Next.js) eCommerce or agency experience Why Velstar?Hybrid working (minimum 3 days per week in our Liverpool or Leeds office) A senior role with real technical influence and ownership Complex, high-traffic projects that challenge and grow your skills A collaborative team that values quality and continuous improvement Clear progression opportunities for senior engineers If you enjoy building scalable systems, mentoring others and solving meaningful technical problems, we'd love to hear from you.#J-18808-Ljbffr Similar jobs

Job Description Senior Backend Engineer (Python | AWS)?? £50,000 per annum ? Fully Remote - UK Based?? Permanent, Full-TimeA well-established UK insurance organisation is undertaking a major backend transformation programme, rebuilding a legacy PHP platform into a modern,..., Senior Backend Engineer (Python | AWS)?? £50,000 per annum ? Fully Remote - UK Based ?? Permanent, Full-TimeA well-established UK insurance organisation is undertaking a major backend transformation programme, rebuilding a legacy PHP platform into a modern, scalable ..., Join to apply for theSenior Software Engineer (Backend)role atLloyds Banking GroupBase pay range Salary: £70,929 - £86,691. Location(s): Edinburgh, Bristol, Halifax, Leeds & Chester. Hours: Full-time - 35 hours per week. Working pattern: Hybrid - 40% (or two days) in one of...

Senior Backend DeveloperHybrid | UK (Liverpool / Leeds) | Full-time At Velstar, we build robust, scalable digital commerce solutions for ambitious brands. We're looking for a Senior Backend Developer to lead the design and development of high-performance web applications and help shape the technical direction of our backend team. This is a senior, hands-on role for someone who enjoys solving complex technical challenges, mentoring others, and making architectural decisions that stand the test of scale. The roleAs a Senior Backend Developer, you'll act as a technical leader within the team, driving architecture, improving performance, and ensuring high coding standards across projects. You'll work closely with frontend developers, DevOps and product teams to deliver scalable, secure and reliable applications. Alongside delivery, you'll mentor junior and mid-level developers, contribute to best practices, and help guide technical decisions from concept through to deployment. What, A leading technology company is seeking a Senior Backend Developer to join their Retail Development team in Leeds. You will design and build scalable Java microservices, mentor engineers, and enhance retail systems. Ideal candidates have strong experience in Java, Spring...