Backend / Fullstack Engineer at hook | London

Dataiku is at the forefront of AI innovation, providing an enterprise platform that facilitates the effective building, deployment, and governance of AI solutions. Our unified environment empowers teams to design and operate analytics, machine learning, and AI agents while ensuring transparency, collaboration, and control across the organization. With the ability to integrate seamlessly with data platforms, cloud infrastructure, and AI services, Dataiku connects the entire AI ecosystem, enabling organizations to leverage AI across multi-vendor environments with centralized governance.The world’s top companies trust Dataiku to operationalize AI, transforming it into a driving force for business performance and delivering tangible value. To learn more, visit the Dataiku blog, LinkedIn, X, and YouTube.Why Engineering at Dataiku?At Dataiku, we are committed to integrating cutting-edge data science technologies within our on-premise, cloud, or SaaS-deployed platform. Our technology stack showcases our dedication to quality and innovation. By incorporating the finest data and AI technologies, we select tools that genuinely enhance our product offerings. From the latest LLMs to our commitment to open-source communities, you will have the opportunity to work with a diverse range of technologies and contribute to the collective knowledge of global tech innovators. For more insights on engineering at Dataiku, click here.Explore our offerings: Dataiku's Key Capabilities; Dataiku's Github; and our Gallery, which showcases example projects (please note that editing is limited and will be reset regularly).Our flagship product, Dataiku DSS (Data Science Studio), is designed to streamline your data science workflow. To see it in action, check out our demo here.

Role Overview Legal & General is looking for a Senior Fullstack Software Engineer to help shape the future of our retirement services. This role focuses on designing and building software that supports and improves our products for customers in retirement. What You Will Do Develop and maintain software solutions across the stack to support retirement services Work closely with teams from different disciplines to deliver new features and improvements Contribute to technical decisions that raise the bar for quality and performance Focus on delivering reliable, maintainable code that enhances user experience Location This position is based in London.

At OakNorth, we're dedicated to empowering the UK's most ambitious businesses. Since our establishment in 2015, we have successfully lent over $21 billion across the UK and US, contributed to the creation of more than 58,000 new homes, and generated 36,000 new jobs, all while supporting hundreds of thousands of personal savers and invigorating the UK economy.Team Mission The Core Banking team is responsible for the foundational systems that drive our financial products, ensuring the integrity of our data and processes.As a Senior Fullstack Engineer, you will oversee the financial accounts domain, focusing on the design, development, and lifecycle of financial products that are compliant, scalable, and seamlessly integrated with our ledger and third-party systems.Your role will involve managing our ledger (Thought Machine Vault Core), ensuring its integration, data integrity, and facilitating technical migrations while collaborating closely with the Thought Machine team.You will be tasked with building resilient, event-driven systems that maintain data consistency and traceability across our internal platforms and external services.Additionally, you will support financial and regulatory reporting, including reconciliations and compliance obligations such as FSCS, providing the necessary systems and data models that ensure auditability, accuracy, and trust, from customer balances to external reports.

Dataiku is the premier platform for AI success, serving as the enterprise orchestration layer for the development, deployment, and governance of AI solutions. Our unified environment enables teams to design and operate analytics, machine learning, and AI agents, ensuring the transparency, collaboration, and control required by enterprises. By integrating data platforms, cloud infrastructure, and AI services, Dataiku connects the entire AI stack across diverse vendor environments, providing centralized governance and empowering organizations to leverage AI as a critical component of their business strategy.Top global companies trust Dataiku to operationalize AI, transforming it into a robust engine for business performance that generates measurable value. For more insights, explore the Dataiku blog, LinkedIn, X, and YouTube.Why Engineering at Dataiku?At Dataiku, we are committed to quality and innovation in our engineering processes. Our platform, available on-premise, in the cloud, or as a SaaS solution, connects a wide array of data science technologies. We pride ourselves on integrating the most effective data and AI tools that enhance our product. Working with cutting-edge technologies, including the latest LLMs and open-source contributions, you will be part of a dynamic team of innovators. Learn more about our engineering culture here.In the Business Solutions department, we are developing applications that harness Dataiku’s capabilities in data and AI. Our focus is on creating user-centered interfaces and workflows for key enterprise use cases across various sectors including Manufacturing, Life Sciences, and Finance, thus integrating AI into daily business operations.How You Will Make an ImpactDevelop Innovative AI-Driven Applications: Design, build, and deploy AI-powered applications that address complex business challenges.

Join Our Team as a Senior/Staff Fullstack Software Engineer!Location: Fitzrovia, London (Hybrid – 4 days in office, 1 day remote)About Us:Wizeline is a forward-thinking, AI-native technology solutions provider dedicated to crafting innovative digital products and platforms. Our mission is to help clients harness the power of data and AI, facilitating swift market entry and transformative business solutions. We pride ourselves on being a global community of innovators, nurturing a culture that emphasizes growth, collaboration, and impactful results.With the right talent and visionary ideas, we believe there are no boundaries to what we can accomplish.Are You the Right Fit?We are in search of a Senior or Staff Fullstack Software Engineer to collaborate with one of our key clients in London. In this pivotal role, you will develop scalable, high-performance services that underpin the company's next-generation financial platform. This encompasses applications for deal execution, invoicing, payment distribution, and financial reporting. You will be instrumental in architecting backend systems, integrating with external platforms, and delivering features that support complex revenue and transaction workflows across the organization.This position follows a hybrid work model based in Fitzrovia (London), with four (4) days per week in the office and one (1) day working from home.Key Responsibilities:Design and implement services that facilitate revenue workflows, payment logic, and invoicing pipelines.Create robust APIs and full-stack features, utilizing type-safe ORM tooling for schema management and query composition.Handle integration with internal systems (e.g., Salesforce, NetSuite) and external providers (e.g., banks, payment processors).Implement structured financial logic including contingent payments, commission calculations, and milestone-based billing.Integrate AI/LLM capabilities using Claude (Anthropic) and utilize Cursor as a core development tool to accelerate delivery.Build and deploy infrastructure in AWS.Translate complex business rules into determinable backend logic: commissions, milestones, payee splits, and contingent payments.Establish robust data flows between Client Processing, Deal Management, and Authoritative Data domains.

Join Our Team as a Senior/Staff Fullstack Software Engineer!Location: Fitzrovia, London (Hybrid – 4 days in-office, 1 day remote)About Wizeline:Wizeline is a pioneering global technology solutions provider that harnesses the power of AI to craft innovative digital products and platforms. Our partnerships with clients enable us to leverage data and AI to expedite market entry and catalyze business transformation. Within our vibrant community of innovators, we cultivate a culture that prioritizes growth, collaboration, and impact.At Wizeline, we believe that with the right people and ideas, there are no limits to our achievements.Are You the Right Fit?If you are excited about technology and innovation, we want to hear from you! We are seeking a Senior or Staff Fullstack Software Engineer to contribute to pivotal projects for our esteemed client in London. In this role, you will be responsible for developing scalable, high-performance services that power the next-generation financial platform, which includes applications for deal execution, invoicing, payment distribution, and financial reporting. You will play an essential role in architecting backend systems, integrating with external platforms, and delivering features that streamline complex revenue and transaction workflows throughout the organization.This position operates under a hybrid work model based in Fitzrovia (London), requiring four (4) days in-office and one (1) day remote.Key Responsibilities:Design and implement services to support revenue workflows, payment logic, and invoicing pipelines.Develop robust APIs and full-stack features, utilizing type-safe ORM tooling for schema management and query composition.Manage integration with internal systems (e.g., Salesforce, NetSuite) and external providers (e.g., banks, payment processors).Implement structured financial logic including contingent payments, commission calculations, and milestone-based billing.Incorporate AI/LLM capabilities using Claude (Anthropic) and utilize Cursor as a core development tool to enhance delivery speed.Build and deploy infrastructure in AWS.Translate complex business rules into deterministic backend logic including commissions, milestones, payee splits, and contingent payments.Implement robust data flows between Client Processing, Deal Management, and Authoritative Data domains.

About Neo4j:Neo4j is the premier graph intelligence platform designed to convert data into actionable insights, facilitating the development of cutting-edge intelligent applications and AI systems. With enterprise-ready knowledge graphs that ensure accuracy, explainability, and governance in AI, we offer the most extensive, reliable, and user-friendly graph capabilities compatible with any environment and data source. Our community includes 84 of the Fortune 100 companies, making us a trusted name in the industry.Our platform is engineered for seamless integration across all clouds, delivering dynamic, personalized, and autonomous AI solutions. We pride ourselves on providing rapid results and contextual knowledge, impacting customers and employees alike.Our Vision:At Neo4j, we continuously strive to help the world unravel the complexities of data. As the interconnectivity of business, society, and knowledge evolves, our technology fosters innovation, enabling organizations to discover and comprehend data relationships. We are at the forefront of the graph database sector, redefining how organizations utilize data to innovate and maintain a competitive edge.The Role:Are you passionate about tackling sophisticated computer science challenges? Do you want to collaborate with a team that prioritizes user success and values open intellectual discourse? We are on the lookout for a skilled backend engineer to join our dynamic Kernel team, adept at overcoming technical challenges and producing high-quality code. You will be a vital part of a talented, energetic, and enjoyable team of engineers dedicated to advancing our storage engines, transaction handling, indexing, data importing, and page caching to enhance the core of our graph database. This role includes collaboration with an international team based in both Malmö and London.Responsibilities:Develop and deploy new features for the core of our leading graph database.Produce high-quality, testable, and efficient code.Encourage innovative ideas, actively participate in feature discussions and roadmap prioritization.Integrate research and emerging technologies into our systems.

lovable is looking for a Fullstack Enterprise Engineer in London. This position centers on building and delivering software solutions that meet enterprise standards. Collaboration with teams across disciplines is a key part of the work. Role overview This role involves developing software from both the front-end and back-end, ensuring each component integrates smoothly. The focus is on producing reliable, maintainable code that supports business needs. What you will do Develop and implement software solutions for enterprise use Work with cross-functional teams to deliver projects Apply experience in both front-end and back-end technologies Requirements Experience with front-end and back-end development Ability to collaborate effectively with colleagues from different specialties Commitment to producing high-quality, impactful results

About UsPhysicsX is a pioneering deep-tech company that blends expertise in numerical physics and the high-speed world of Formula One. Our mission is to drive hardware innovation at an unprecedented pace, leveraging the power of software.We are developing an AI-enhanced simulation software platform aimed at transforming engineering and manufacturing processes across advanced industries. By facilitating high-fidelity, multi-physics simulations through AI inference throughout the entire engineering lifecycle, PhysicsX empowers engineers to achieve exceptional levels of optimization and automation in design, manufacturing, and operations. Our clientele includes top-tier innovators from Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive sectors.The RoleWe are creating a platform that allows Data Scientists and Simulation Engineers to seamlessly build, train, and deploy Deep Physics Models. Our platform caters to multiple tenants within highly regulated industries, making advanced identity, access control, and operational visibility integral to our operations.We are in search of a Senior Software Engineer to join our Core Services team. This team is responsible for constructing the foundational elements that provide our customers with unparalleled capabilities. For too long, engineers have relied on outdated, siloed tools from the 90s. We aim to revolutionize this by enabling secure, permissioned collaboration at the vanguard of AI.In this role, you will design and develop enterprise-grade systems that facilitate this transformation. From fine-grained permissions to comprehensive instrumentation, you will create the essential components that every product within PhysicsX will utilize, ensuring that every user, service, and workflow is securely identified, appropriately scoped, and fully observable. You will take ownership of the infrastructure that maintains our platform's trustworthiness, transparency, and readiness for the future of engineering and manufacturing.

Please note: this position requires relocation to our Milan office.About SatispaySatispay is on a mission to transform everyday transactions, making payments straightforward, equitable, and accessible for all. We aspire to redefine the future of finance, empowering millions with a collective goal to address significant challenges. Our journey is just beginning.Joining our Core Team means engaging with essential systems that include managing relationships with external banks, orchestrating payments, and establishing the foundational infrastructure for Identity and Access Management. Our team also oversees risk management services, specifically credit risk evaluation and fraud detection.We value agility, bold thinking, and mutual trust, fostering an environment where challenging the status quo is encouraged, and continuous learning is a priority. If you seek more than just another job and wish to contribute to impactful projects alongside a skilled team, look no further.Key ResponsibilitiesAs a Staff Software Engineer within the Core Team, you will play a pivotal and strategic role in developing the backbone of our payment platform. You will work on mission-critical engines that empower Satispay, ensuring reliability, consistency, and security for millions of users.Daily tasks will include:Define Technical Strategy: Establish the long-term technical vision for critical domains, architecting complex subsystems that serve as the company's foundation, while balancing cross-product needs with speed and reliability.Architect Core Financial Systems: Design and scale high-throughput engines responsible for our transaction ledger, payment orchestration, and external bank integrations, ensuring accuracy and availability of our 'source of truth.'Own Identity & Security Infrastructure: Develop and maintain the base infrastructure for Identity and Access Management (IAM), including authentication and authorization layers that secure our users.Engineer Risk & Fraud Solutions: Create and enhance sophisticated services dedicated to credit risk management and fraud detection, implementing real-time protective logic for the company.

Join physicsx as a Senior Software Engineer specializing in Site Reliability Engineering (SRE). In this pivotal role, you will be responsible for enhancing our core infrastructure, ensuring reliability, scalability, and performance of our software systems. You will work with a talented team to design, implement, and maintain robust solutions that meet the needs of our users.As a senior engineer, you will also mentor junior team members, contribute to architectural discussions, and drive best practices in software development and operations.

Wise is seeking a Fullstack Engineer to focus on account setup features. This role centers on building and improving the systems that help customers create and manage their accounts smoothly. Role overview The Fullstack Engineer will work on both front-end and back-end components that support the account setup journey. Expect to collaborate closely with team members to identify pain points and deliver solutions that make onboarding easier for users. What you will do Develop and refine account setup processes to improve customer experience Work with engineers and other stakeholders to solve technical challenges Contribute to a collaborative team environment Requirements Experience working as a fullstack engineer Comfortable collaborating with others to solve problems Interest in building seamless, user-friendly account setup flows

Join Vanta as a Senior Fullstack Software Engineer specializing in Privacy & Data Security. In this role, you'll leverage your extensive experience in software development to enhance our platform's privacy features while ensuring data integrity and security. You will collaborate closely with cross-functional teams to design, develop, and implement robust solutions that protect user data.

Join our dynamic team at Another Company as a Fullstack Engineer, where your skills will be pivotal in building innovative solutions. You will collaborate with cross-functional teams to design, develop, and maintain web applications.This role offers an exciting opportunity to work with cutting-edge technologies and contribute to impactful projects.

About the RoleJoin our dynamic Collection Engineering team as a Senior Fullstack Engineer, where you will play a pivotal role in enhancing Elliptic's efforts to combat crypto crime. You will be instrumental in developing a robust platform that empowers our intelligence organization to efficiently gather and analyze critical information, making the world safer.Your team’s mission is to amplify Elliptic’s intelligence collection capabilities by processing data from diverse sources, including external feeds, internal automation, and client submissions. This intel needs to be systematically classified, stored, and reviewed before being integrated into our proprietary graph database.Collaborate with a talented group of engineers and data scientists to create innovative tools, streamline processes, and eliminate obstacles in our intelligence pipelines.Key ResponsibilitiesDesign and implement software solutions that enhance our intelligence collection and analysis capabilities, including services on Kubernetes and browser extensions.Develop applications to analyze cryptocurrency behavior and trends across both the clear and dark web.Establish observability mechanisms to identify issues within your environments and execute necessary business processes for resolution.Mentor and coach fellow engineers to foster growth and implement best practices within the team.Actively contribute to defining and refining the engineering strategy for your team.Ideal Candidate ProfileDemonstrates a strong passion for cryptocurrencies and blockchains from both technical and economic perspectives.Possesses excellent coding skills in Typescript with a proven track record of delivering effective solutions.Has successfully integrated various systems to improve operational efficiency.Enjoys collaborating within a tight-knit team to tackle impactful challenges, contributing to a safer crypto ecosystem.Promotes a collaborative culture characterized by open communication, especially when addressing issues or concerns.Able to construct well-reasoned, data-driven arguments to influence key stakeholders effectively.

About the Role Shawbrook Bank is looking for a Lead Engineer to join the Vault Core Engineering team in London. This position plays a key part in shaping and developing the bank’s core banking systems. The Lead Engineer sets technical direction, supports the team, and ensures solutions meet high standards for quality and performance. What You Will Do Drive engineering projects focused on core banking system development Guide the team in building scalable, reliable solutions Maintain strong quality and performance standards throughout the engineering process Location London

Mendix builds a low-code application development platform used by organizations worldwide to launch new ideas quickly. Since joining Siemens in 2018, Mendix has blended the scale of a global software company with the flexibility of a fast-growing team. The Solutions Engineer - Core AI position is available in several cities: London, Rotterdam, Amsterdam, Munich, Berlin, Erlangen, Frankfurt, or Stuttgart. This role centers on developing and scaling hybrid agentic workforces by combining low-code tools, AI, data, and system integrations. The goal is to help organizations efficiently create and orchestrate agents and applications. What you will do Design and build customer-facing prototypes and lighthouse projects to test and validate AI-driven integration scenarios. Lead strategic workshops and technical sessions with both customers and internal teams, focusing on agentic AI workflows and advanced integrations. Transform successful customer projects into reusable assets, such as reference architectures, blueprints, accelerators, and scalable patterns. Act as the technical lead for agentic system design, guiding tool selection, orchestration, and multi-agent strategies. Develop and manage complex integration architectures to ensure smooth operation across diverse platforms.

Role Overview Wise is looking for a Senior Software Engineer II with fullstack experience and a focus on Server Driven UI. This role centers on building and maintaining software that supports smooth user experiences across different platforms. What You Will Do Design and implement software systems for Server Driven UI Work closely with teammates to develop solutions that improve user experience Apply fullstack engineering skills to deliver features across both frontend and backend Location This position is based in London.

Join the Lovable Revolution:Are you a passionate full-stack engineer dedicated to driving growth? At Lovable, we’re on a mission to transform initial interactions into daily habits and foster a vibrant ecosystem that generates real revenue. You'll find yourself launching onboarding and activation flows one sprint, and the next, you'll be innovating distribution channels and monetization features, empowering creators to expand their user base and enhance retention. Your expertise in React and APIs is crucial, but above all, you prioritize user success and engagement.The Ideal Candidate:You possess a unique blend of coding prowess, strong aesthetic judgement, growth-focused instincts, and an unwavering passion for product development.Why Join Lovable?Lovable empowers individuals and teams, from freelancers to Fortune 100 companies, to create software in any programming language. Our platform has already attracted over 2 million users across more than 200 countries, helping them bring ideas to life quickly and efficiently. As part of our small yet talented team in Stockholm, you'll play a pivotal role in redefining the software development landscape. We value ownership, speed, and collaborative spirit, and we seek individuals who are driven, fast-paced, and eager to make a significant impact.