Senior Backend Software Engineer - Application Development

About Us at GoCardlessGoCardless is a global bank payment solution provider. More than 100,000 businesses, from innovative start-ups to established brands, trust GoCardless for their payment collections via direct debit, real-time payments, and open banking.We facilitate the processing of over US$130 billion in payments annually across more than 30 countries, enabling customers to efficiently manage both recurring and one-off payments without the hassle or high fees. Our AI-driven technology enhances payment success rates and minimizes fraudulent activities. With connectivity to over 2,500 banks through open banking, we empower our customers to make faster and more informed decisions.Headquartered in the UK, we have offices in London and Leeds, along with additional locations in Australia, France, Ireland, Latvia, Portugal, and the United States.At GoCardless, we prioritize supporting you! Our hiring process is designed to be inclusive and accessible. If you require any assistance or adjustments, please reach out to your Talent Partner — we are here for you!Remember, you don’t need to fulfill every requirement to apply. If you are excited about this role, we encourage you to apply!The RoleThis is a contract role with a daily rate lasting for 3 months, with the possibility of extension up to 6 months. You will spearhead the engineering efforts that support the search functionality in our merchant dashboard — the main interface used by thousands of businesses to manage their customers and payments on GoCardless.Search functionality is vital for our merchants. Whether they are searching for a specific customer, tracking a payment, or reconciling transactions, they depend on an efficient search system to access the right information swiftly. You will design and implement a robust, high-performance search solution that is relevant, fast, and resilient at scale.This hands-on engineering position requires close collaboration with our Product Engineering and Platform teams, contributing production-ready code and pairing with engineers throughout your engagement. A key measure of success will be how well the team can maintain and evolve the system after your departure.

Role overview As a Senior Software Engineer at 9fin, this position centers on developing and enhancing data-driven systems using Elasticsearch. The main focus is on building scalable search and analytics solutions that support 9fin’s products. Deep experience with Elasticsearch is essential for success in this role. What you will do Design and implement search and analytics features built on Elasticsearch Improve the performance and scalability of existing systems Maintain and evolve the technology stack, emphasizing search functionality Work closely with engineers and stakeholders to deliver solutions aligned with business needs Location This role is based in London.

Join Elastic, the leading Search AI Company, as a Principal Software Engineer II focused on Search Internals for Lucene and Elasticsearch. In this pivotal role, you will leverage your extensive expertise to drive the evolution of our core search capabilities, ensuring we deliver an unparalleled search experience. Collaborate within a globally-distributed team of seasoned engineers to enhance our search infrastructure, including indexing and retrieval. You will define the technical vision and roadmap for Elasticsearch, working closely with product teams to shape innovative solutions that meet user needs. Your insights will continuously improve the search experience, making you a key authority in the field.

At Mindera, we are seeking a highly skilled Senior Software Deployment Engineer to take charge of the delivery, configuration, testing, and deployment of applications and retail device solutions in complex, large-scale environments. This pivotal role allows you to influence deployment strategies, spearhead automation efforts, enhance system reliability, and mentor fellow engineers.Your collaboration with product, platform, and engineering teams will be crucial in ensuring the seamless, secure, and high-quality release of applications that reach thousands of customers. Please note that this is a hybrid role, requiring you to be onsite in Bracknell three days a week.

Do you have the passion to drive innovation? Join AnyVan and revolutionize the way we move anything, anywhere while building a fulfilling career that accelerates with every challenge. Founded in 2009 by our visionary CEO Angus, AnyVan emerged from the need to optimize logistics by utilizing underused van space. Our mission is to transform logistics technology, dramatically reducing wasted journeys and carbon emissions. With over 150,000 five-star reviews and a customer base exceeding 5 million across the UK and Europe, we are proud to be the preferred choice for countless users. Our dedicated team of 400 AnyVanners, operating from London, Cape Town, and Bogota, is committed to reducing carbon emissions by 8,520 tonnes annually. Be at the forefront of logistics innovationAt the core of our operations is a cutting-edge optimization platform that seamlessly connects customer needs with real-time driver availability, enabling us to provide exceptional service at unbeatable rates.By efficiently matching jobs with drivers already on the road, we minimize unnecessary miles, reduce emissions, and ensure fair earnings for our drivers. It’s a complex interplay of logistics, pricing, and marketplace dynamics, all powered by advanced software.And this is just the beginning...As we embark on the next phase of development, we're transitioning our platform to a truly intelligent logistics marketplace. Your role will involve designing and building systems to:Accurately model job-level costs in real time, paving the way for smarter, more dynamic pricing strategies.Enhance our driver platform, integrating it deeper into their daily operations and unlocking new revenue streams.Establish a two-sided marketplace, facilitating the buying and selling of non-core jobs among drivers to optimize utilization.Scale efficiently as we grow in volume, complexity, and ambition.This position is ideal for engineers who thrive on tackling complex, high-impact challenges and shaping the evolution of a scalable platform.

Senior Ruby on Rails Developer - Contract Position - £550/DayKey Challenges:Join a rapidly growing company that is becoming a household name! Our primary challenge is achieving scalability, and we are seeking experienced Senior Ruby on Rails Contractors who can engage with the entire product development process and contribute to architectural decision-making. As a contractor, mentoring junior staff and demonstrating proficient coding skills in Ruby (and Rails) with a focus on Test-Driven Development (TDD) is essential.Desired Qualifications:Proven experience in scalability and architectural decision-making as a Senior Ruby on Rails Engineer.Interest in functional programming and familiarity with Kafka is highly desirable.Experience in DevOps practices along with strong stakeholder management skills is preferred.Compensation: The rate is £550 per day for an initial period of 3 months.If you are interested, please send your CV to Sam Wellalage for a confidential discussion.

Senior Ruby on Rails Developer (Contract)5iveTech Recruitment is seeking an accomplished Senior Ruby on Rails Developer to join a rapidly expanding tech company based in Central London.We are in search of a highly skilled Ruby on Rails Engineer proficient in Test-Driven Development (TDD) and Pair Programming, ready to thrive in a collaborative and innovative environment.If you are a Contract Senior Ruby on Rails Engineer who enjoys contributing to diverse projects in a solution-focused setting, we invite you to send your CV to Sam Wellalage at 5iveTech Recruitment.

Join PlayStation as a Senior Software Development Engineer in Test and play a crucial role in enhancing our SDK's quality engineering framework. You'll design and implement robust CI/CD pipelines, develop automation tools in Python, and create automated tests across various system layers. Collaborate with cross-functional teams to improve workflows and ensure seamless delivery across multiple platforms. This role demands a strong technical background, collaboration skills, and a drive for impactful results in a dynamic environment.

Join our innovative team at getscope as a Senior Software Engineer. In this pivotal role, you will design, develop, and implement cutting-edge software solutions that will drive our projects forward. Collaborate with cross-functional teams to translate business needs into technical requirements while ensuring high quality and performance of applications.

About the PositionWe are seeking a highly skilled and motivated Senior Software Engineer - Generalist to join our innovative team at Anza. This role is pivotal in enhancing our Agave client and the overarching Solana network, focusing on performance, reliability, and security.About UsAnza is a cutting-edge R&D lab focused on the Solana blockchain, dedicated to revolutionizing blockchain performance and scalability. With a team of seasoned executives and core engineers, we tackle the most pressing challenges in the Web3 space. We believe in the power of collaboration and transparency, building robust protocols that can support the crypto ecosystem's growth and security.Your ResponsibilitiesDevelop and optimize our technical infrastructure, particularly the Agave client within the Solana ecosystem.Design and implement testing frameworks to simulate adversarial attacks and proactively identify vulnerabilities.Analyze performance metrics to pinpoint and resolve bottlenecks.Collaborate with subject matter experts to understand and define performance requirements for code components.Benchmark new solutions to enhance system reliability and performance.Work alongside cross-functional teams to architect solutions focused on scalability, security, and optimal performance.Contribute to all stages of the software development lifecycle, ensuring seamless transitions through development, staging, and production.Document architecture and processes to promote standardization and knowledge sharing across teams.

Join Multiverse as a Senior Software Engineer specializing in Platform Engineering. In this pivotal role, you will leverage your expertise to design, build, and enhance our platform, ensuring it meets the highest standards of performance and reliability. Collaborate with cross-functional teams to deliver robust solutions that drive the success of our innovative programs.

Role overview The Senior Software Engineer I at Runna will play a key part in shaping how users interact with the company’s products. The work centers on designing, developing, and maintaining applications that support a strong user experience. Expect to take a hands-on approach, working closely with colleagues from different teams to deliver solutions that scale and perform reliably. Location This role is based at the Runna office in London.

Join our innovative team at AECOM as a Senior Software Engineer, where you will play a critical role in designing and developing cutting-edge software solutions. You will collaborate with cross-functional teams to bring complex projects to fruition, ensuring high quality and performance standards are met.

About the Role Shawbrook Bank is looking for a Senior Software Engineer in London. This role focuses on building software that supports business growth and improves efficiency. Collaboration with other engineers and teams is central to the work. What You Will Do Develop and maintain high-quality software tailored to customer needs Work closely with colleagues to deliver solutions that support the bank’s goals Contribute technical expertise to projects and ongoing improvements

Join our dynamic team as a Senior Software Engineer at Faculty, where innovation meets technology. In this pivotal role, you will be responsible for designing, developing, and maintaining cutting-edge software solutions that drive our projects forward. We're looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges.Your expertise will guide our team in implementing best practices in software development, ensuring high-quality code and optimal performance. You will work closely with cross-functional teams to deliver impactful products that enhance our customers’ experiences.

Role overview Entain is looking for a Senior Software Engineer in London to help shape its technology landscape. This role involves building software solutions that improve the user experience for gaming and entertainment products. Collaboration with skilled teams is central to the work, as is staying current with new technologies.

Role overview Entain seeks a Senior Software Engineer based in London. The position centers on designing, building, and refining high-performance applications that drive key business objectives. Collaboration is a core part of this role, with regular interaction across multiple disciplines to deliver dependable software solutions. What you will do Develop and improve software applications, focusing on performance and scalability Work with cross-functional teams to bring features from initial idea through to deployment Offer technical insight that helps guide Entain’s technology strategy

Mindera is seeking a talented Software Deployment Engineer to spearhead the delivery, configuration, testing, and rollout of software and device solutions across diverse environments. Collaborating closely with software engineers, product teams, and platform specialists, you will enable seamless deployments that cater to millions of customers and thousands of team members.This role is ideal for individuals who thrive in hands-on deployment, automation, configuration, testing, and troubleshooting within a broad technology landscape.This is a hybrid role requiring you to be onsite in Bracknell three days a week.

Role overview Based in London, the Senior Software Engineering Manager for Quality Engineering at Sony Interactive Entertainment Global leads a talented group of engineers. The position centers on defining and executing the strategy for software quality and performance across projects. Main responsibilities Shape the strategic direction for the quality engineering team Mentor and guide engineers, supporting their professional development Establish and maintain effective software testing practices Encourage ongoing improvement within the team Collaborate with cross-functional partners to ensure quality standards are met throughout the software development lifecycle Collaboration and impact This leadership role bridges engineering and quality, making sure software products meet rigorous standards from initial planning through release. Regular interaction with teams across Sony Interactive Entertainment Global helps to maintain and raise quality expectations company-wide.