Senior Java Back-End Developer

Join CUR8 as a Back-end EngineerAt CUR8, we are on a transformative mission to reshape the carbon removal landscape. With the pressing need to eliminate 5-10 Gigatonnes of CO₂ by 2050, our innovative platform empowers organizations worldwide to meet their carbon neutrality goals.As part of our dedicated Risk Engine squad, you will play a pivotal role in evaluating and refining high-quality carbon removal projects, ensuring our clients have access to reliable insights and data.Your collaboration with our Lead Software Engineer, Senior AI Engineer, and scientists will be vital in converting scientific criteria into robust, scalable software solutions.Key ResponsibilitiesDevelop Application Logic: Craft the code that manages data flow, from document ingestion to model result handling.Translate Science into Code: Work closely with Carbon Scientists to understand project criteria and develop corresponding code logic.Manage Unstructured Data: Create systems that can transform complex real-world inputs into structured, actionable data.Deliver Insights: Design APIs and data structures that present findings to customers in an intuitive user interface.Our Technology StackCore Back-end: GoData Stack: PythonDatabase: PostgreSQLInfrastructure: Google Cloud Platform, TerraformAI Tools: Claude, Gemini, GPTWhile expertise in both Go and Python is not essential, a willingness to engage with both is necessary.Your Technical ExpertiseExperience: A minimum of 2 years in building and maintaining backend software.Language Proficiency: Comfortable with a statically typed language (preferably Go).

Back End Engineer - New VenturesJoin us in a hybrid capacity at iwoca, located in London, United Kingdom (minimum one day in the office per week).About the Role:As a Back End Engineer on the Credit Compass team, you will play a pivotal role in designing and developing scalable, high-performance services that enhance small businesses' understanding of their credit health. You will work with rich data sources, including Open Banking and credit reports, to provide actionable insights that empower business owners.About iwoca:At iwoca, we recognize that small businesses need fast and flexible finance solutions. Our cutting-edge technology, data science, and exceptional customer service have already aided over 100,000 businesses with more than £4 billion in funding. We are on a mission to empower one million SMEs with the financial tools they need to thrive, making a lasting impact on the communities they serve.The Team:Join a dynamic and collaborative Credit Compass team dedicated to transforming complex financial data into clear, actionable insights. Our cross-functional group of engineers, product managers, designers, and analysts work closely to deliver outstanding features that enhance our customers' experience.

Fraud Alert:Beware of scammers creating fake job listings on other platforms. To ensure your application is considered, please submit your application exclusively through Sensor Tower's official website or through postings directly associated with Sensor Tower on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account details as part of the application process. All official communications from Sensor Tower will come from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and we will not transition to other email services or texts. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Notice to Recruitment Agencies:Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, Sensor Tower employees, or any other company location. We will not be liable for any fees related to unsolicited resumes and will not pay any agency or company without a signed agreement.About This Role:Are you passionate about developing products that leverage real-world, large-scale data? At Sensor Tower, we process vast amounts of data to provide insights for thousands of customers. We are seeking enthusiastic, early-career engineers eager to enhance their skills while collaborating with us to create fast, reliable systems that simplify data access and understanding.You will collaborate closely with seasoned engineers, contribute to impactful features from day one, and gain insights into the design, construction, and optimization of large-scale systems in a production environment.If you thrive on learning, problem-solving, and delivering real software that users depend on, we would love to hear from you. We have a strong history of rapidly advancing talented juniors, and this position offers a unique opportunity to work closely with senior leadership.Our Engineering Culture:We believe that "Simplicity is a prerequisite for reliability." We seek engineers who resonate with our core values:- Simplicity: We avoid unnecessary complexity, favoring existing tools and straightforward solutions over trendy new technologies.- Quality: We write code that is enjoyable to read, understanding that code is often read more than it is written. We do not cut corners and strive for high standards before deployment.

Fraud Alert:At Sensor Tower, we prioritize your safety during the application process. To be considered for a position, please apply exclusively through our official website or directly through recognized platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. We will never request payment or sensitive information such as credit card or bank details for job applications. All communications from us will originate from email addresses ending with sensortower.com. Interviews will be conducted via phone or Zoom, and no communication will occur through unverified email or text. If you encounter any suspicious activity, please let us know. Remember to attach your resume when applying.Recruitment Agency Notice:Sensor Tower does not accept unsolicited resumes from third-party recruitment agencies. Please refrain from sending resumes to our job alias, employees, or any other company locations. Sensor Tower will not be liable for any fees related to unsolicited resumes and will only pay agencies with a signed agreement.Role Overview:We are on the lookout for a talented Back End Engineer to join our team. You will play a crucial role in scaling our database operations and managing vast amounts of data (up to tens of terabytes). Your creativity and technical skills will be essential in deriving valuable insights and data.As a member of the Sensor Tower engineering team, you will contribute to developing top-notch products and features that enhance our user experience. In our agile and flat organizational structure, your input will directly influence the direction and execution of our projects.A Day in the Life:Interviewee: Engineering Team Lead - Sasha YelkovenkaDescribe a typical day as a Software Engineer.My role involves working extensively with large datasets, which are continuously growing. My primary responsibility is ensuring our customers can access this data swiftly and providing them with user-friendly tools for data utilization. I appreciate the culture of ownership at Sensor Tower.How do you collaborate with your remote team?We foster an excellent remote work environment, frequently collaborating via Zoom to leverage each other's expertise for improved outcomes.

At Solve Intelligence, we are not merely developing features; we are shaping the foundational infrastructure that aims to revolutionize the global legal and IP landscape. The Role: Full-Stack Engineer (Back-End Focus)We seek an exceptionally skilled engineer to assist in the rapid development of both the front-end and back-end of our innovative products. You will join a lean, highly talented engineering team based in London.Key Responsibilities:Foundation Scaling: Design and construct robust and scalable backend systems from the ground up to cater to a vast global market.User-Centric UI: Collaborate on planning and refining our React-based front-end to ensure our sophisticated AI systems are user-friendly and widely embraced.Product Development: Work alongside the founders to derive insights from customer feedback and translate them into actionable technical solutions.Culture Building: Contribute to establishing the engineering culture and play a critical role in building a top-tier technical team. About Solve IntelligenceWe are a rapidly growing startup redefining how IP professionals operate.Growth: Enjoying a 20-30% month-over-month revenue increase while serving over 100 IP teams (ranging from DLA Piper to premier tech boutiques).Proven Efficiency: Users report efficiency improvements ranging from 50-90%.Investment: Recently highlighted in Sifted following our $40M Series B funding round, bringing our total funding to $55M from notable investors including Y Combinator, 20VC, Visionaries, and others. Your TeamYou will collaborate directly with a founding team comprising AI PhDs and systems specialists:

Senior Back End Engineer - German MarketJoin us in a hybrid role based in London or work remotely from anywhere in the UK.About the RoleWe are seeking a skilled Senior Back End Engineer to develop and enhance the systems that drive iwoca's operations in the German market. You will collaborate within a dynamic, cross-functional engineering team tasked with building proprietary tools such as our CRM system, utilized daily by our German operations team. You will spearhead significant projects from inception to delivery, leveraging your technical expertise to enhance our services for small businesses while fostering the growth of the overall engineering team.Company OverviewAt iwoca, we understand the fast-paced world of small businesses. Opportunities can arise unexpectedly, and cash flow challenges can emerge overnight. That's why we offer flexible and responsive financial solutions tailored to the needs of SMEs. Our advanced technology, data science, and exceptional customer service empower business owners to act swiftly and confidently when it matters most. With over 100,000 businesses supported and more than £4 billion in funding provided, our dedicated team is on a mission to help one million SMEs thrive, making a lasting impact on their communities and economies.The TeamOur DE Tech team is an expanding group of engineers divided into three cross-functional teams. Together, we build and maintain essential systems—including underwriting, notifications, and account management tools—that empower over 300 colleagues in sales, credit, and collections. As our German business scales, these teams are innovating beyond incremental improvements to fundamentally enhance operational workflows, ensuring that we can respond quickly and reliably to the needs of our customers.Your ContributionsIn this role, you will engineer systems vital to both internal and external teams in delivering outstanding customer service. You will oversee engineering processes from problem identification to implementation, witnessing the direct impact of your work in everyday applications. Your designs will underpin back-end services that facilitate core operational tasks, including customer communications and underwriting.

About Marcura:Marcura stands at the forefront of maritime technology and operations, playing a pivotal role in facilitating nearly one-third of the global seaborne commodity trade. Our innovative platforms, which encompass software solutions, data intelligence, and payment processing, are integral to the digital transformation journey within the maritime sector. We are currently on the lookout for a Senior Back-End Software Engineer to join our dynamic and impactful team, contributing to the success of one of the industry's most innovative organizations.Role Overview:In the position of Senior Back-End Software Engineer, you will take charge of the architecture, design, development, and testing of scalable Compliance and RegTech solutions. Your mission will be to construct and maintain secure, high-performance applications utilizing Django REST Framework and Python (backend) to enhance counterparty onboarding, risk assessment, and regulatory screening processes.Your responsibilities will include overseeing code and tests to ensure the robustness of APIs, seamless integrations, and adherence to industry standards such as GDPR and ISO 27001. You will champion secure coding practices, implement embedded testing (shift-left), and drive automation efforts, collaborating closely with product managers, UX designers, and compliance specialists to ensure alignment between technology and business objectives. Staying abreast of industry trends, you will introduce innovative solutions in full-stack development, AI, and compliance automation.Key Responsibilities:Develop and manage APIs that facilitate onboarding, screening, and entity intelligence, ensuring optimal performance, version management, and traceability.Enhance product capabilities by integrating new data-driven features (such as search, risk scoring, relationship mapping) while maintaining system stability.Incorporate ElasticSearch for superior query performance and analytics on a large scale.Collaborate with data and other platforms/services to support risk assessment and compliance automation.Work in close partnership with product teams, UX designers, and compliance experts to ensure technical solutions align with business strategies.Adopt a shift-left testing methodology, embedding unit, integration, and end-to-end tests within the development lifecycle, minimizing dependence on external QA resources.Implement industry best practices for secure coding, data privacy (GDPR), and compliance automation, ensuring regulatory adherence.Ensure security, scalability, and maintainability of full-stack applications.Establish best practices for data modeling, ETL processes, and regulatory compliance (GDPR, ISO 27001) in data-centric applications to guarantee data integrity, consistency, and security.Stay updated on emerging technologies in full-stack development, AI, and compliance automation, proposing innovative ideas to elevate products and processes.

Join us as a Front-end Engineer at Magentic, where you will play a pivotal role in shaping the way leading enterprises interact with AI on a daily basis. You will enhance the core product experience for users as they collaborate with AI agents to achieve what they once thought was impossible.If you’re passionate about human-computer interaction and eager to work at the forefront of AI technology, we want to hear from you!We are breaking new ground with innovative agentic systems capable of managing entire procurement workflows. Our mission is to empower global manufacturing supply chains to adapt in a constantly evolving world, targeting a $3 trillion market opportunity.Excitement continues as we are backed by top-tier investors, including Sequoia Capital, and you will be collaborating with a highly skilled team drawn from industry giants such as OpenAI, Meta, Revolut, NASA, and McKinsey.

Role Overview Vega is hiring a Front-end Engineer in London. This position focuses on building and improving web interfaces that serve a wide range of users. The work centers on creating responsive, accessible designs and collaborating with colleagues from different teams. What You Will Do Work with cross-functional teams to design and implement user interfaces Use HTML, CSS, and JavaScript to build and refine web pages Contribute to a consistent and positive user experience across Vega’s products Ensure designs adapt smoothly to different devices and screen sizes Key Skills Proficiency in HTML, CSS, and JavaScript Experience developing responsive web interfaces Ability to collaborate with team members from different disciplines This role is based in London.

Join Multiverse, an innovative upskilling platform at the forefront of AI and technology adoption. We partner with over 1,500 organizations to reshape the workforce through transformative learning experiences.Our apprenticeships cater to individuals across all ages and career stages, equipping them with essential AI, data, and tech skills. Our learners have generated more than $2 billion in ROI for their employers by applying their new skills to enhance productivity and performance metrics.In June 2022, we secured a $220 million Series D funding round, co-led by StepStone Group, Lightspeed Venture Partners, and General Catalyst, achieving a post-money valuation of $1.7 billion and becoming the UK’s first EdTech unicorn.With a robust operational presence and a team of over 800, we have ambitious plans for further expansion. Our vision is to create a world where technology skills unlock individual potential and drive results. Become part of Multiverse and help us empower the workforce to thrive in the age of AI.We believe that the most remarkable user experiences arise from the synergy of outstanding design and engineering. We are seeking a Front End Engineer focused on our Design System, which is pivotal in delivering top-tier UX to nearly half a million learners.Design engineering is a diverse field; we welcome both design-savvy engineers and technically inclined designers. You'll be instrumental in developing our design system and other essential frontend projects while exploring how emerging technologies (AI, agentic tools) can revolutionize development practices.The OpportunityAs part of a multidisciplinary team that encompasses brand, product design, and engineering, your primary focus will be to enhance and evolve Multiverse’s design system, ensuring our suite of applications is consistent, accessible, and high-performing at scale.Additionally, you will investigate how agentic workflows and AI-driven tools can facilitate innovative working methods—allowing teams to prototype, experiment, and implement changes across applications swiftly. Your contributions will redefine collaboration between design and engineering and help pioneer the next generation of design engineering at Multiverse.What We Mean by an “Agentic Design System”We aim to elevate our design system to enable swift modifications across our applications in minutes, rather than days.Our goal is to empower product and design teams to prototype and experiment without compromising quality through vibe-coded interfaces.We seek to provide our developers and designers with top-tier tools to enhance their creative processes.

Role Overview 8th Light, Inc. is seeking a Senior Software Engineer to join its London-based team. This hybrid role offers the chance to work alongside experienced engineers on a variety of client projects. The company is a well-established software consultancy, known for its focus on quality and collaboration. What You Will Do Design, develop, and maintain software applications for a range of clients and industries Work closely with other engineers to deliver reliable, well-crafted solutions Mentor junior engineers, sharing knowledge and supporting their professional growth Contribute to a team culture that values learning and continuous improvement Location This position is based in London, England, with a hybrid work arrangement.

About EdraAt Edra, we tackle one of the most complex challenges in enterprise AI: while AI models are broadly applicable, company processes are uniquely tailored. Our innovative AI agents learn the intricacies of these processes and optimize their operations accordingly.As a Series A startup backed by Sequoia and other top venture capital firms, we're rapidly expanding our teams in New York and London. Our engineering team consists of highly skilled engineers, AI researchers, and strategic thinkers who share the conviction that extraordinary talent is the cornerstone of groundbreaking innovations.The RoleWe are on the lookout for Product Engineers who are passionate about the art of software development. Ideal candidates will excel in strong typing, thoughtful API design, and robust data modeling, ensuring our systems are enjoyable for other engineers to engage with. As an early member of the engineering team at Edra, you will not only influence product development but also help shape our engineering culture, tooling, and foundational technologies.Our approach is both intentional and thorough. We believe there should be no divide between building and shipping; you will transition from the drawing board to production and assume full responsibility for the results. We prioritize crafting robust solutions over hastily delivering fragile outputs, and we view speed and quality as mutually reinforcing, rather than opposing factors.What You'll DoDevelop high-quality user-facing product experiences primarily using TypeScript and React.Engage in frontend architecture decision-making.Collaborate closely with design teams to contribute to product direction and design, articulating clear rationale behind interface decisions.Take ownership of your projects: gather context, manage dependencies, and drive tasks to completion autonomously.Adapt to various roles as necessary, whether building a component library, collaborating with designers, or debugging issues at the API level.Work collaboratively within a cross-functional team of engineers and AI specialists.Shape the technical direction by selecting tools, establishing patterns, and setting conventions that the team will rely on for years to come.Commit to continuous personal growth and knowledge sharing within the team.While primarily focused on frontend development, a solid understanding of backend systems will be necessary for troubleshooting.

Role Overview 8th Light, Inc. seeks a Principal Software Engineer for its London office. This hybrid role combines in-office and remote work, supporting both flexibility and close team collaboration. What You Will Do Lead software projects from planning through delivery Mentor junior developers and support their growth Work with cross-functional teams to build high-quality software products Promote technical excellence and encourage continuous improvement within the team Who We’re Looking For We value engineers with a track record of building reliable software, a collaborative approach, and a commitment to craftsmanship. Experience leading teams or projects is important. A willingness to share knowledge and help others grow is essential. Location London, England, United Kingdom (hybrid: in-office and remote work)

Join Jane Street as a Front End Software Engineer, where your passion for front-end development and user-interface design will drive the creation of innovative browser-based tools for our trading infrastructure. As we cater to expert users, our goal is to uphold an exceptional user experience while crafting tools that are both flexible and powerful enough to meet the demands of our highly engaged clientele. In this role, you will not only contribute to individual tools but also identify opportunities to develop libraries and abstractions that encapsulate common interaction patterns, enhancing our development practices and overall approach to UI development.

Become a Part of the Motorino London Family!At Motorino London, our mission is to create an extraordinary culinary journey through outstanding food, unparalleled service, and a lively ambiance. Nestled in the vibrant Fitzrovia district, our restaurant specializes in contemporary London-Italian cuisine, proudly sourcing seasonal ingredients from top suppliers.Your RoleWe are on the lookout for a meticulous and passionate Back of House Manager to lead our kitchen operations and ensure everything flows seamlessly. In this pivotal position, you will oversee all facets of back of house functions, including staff management, inventory oversight (including orders, invoices, and stock management systems), as well as adherence to health and safety regulations. This is a fantastic opportunity for a dynamic leader who thrives in a fast-paced culinary environment.Key ResponsibilitiesOversee daily back of house operations, maintaining high standards for food quality and safety.Supervise kitchen staff, focusing on training, scheduling, and performance evaluations.Manage inventory, ordering, and stock control processes to reduce waste and enhance efficiency.Ensure compliance with health and safety regulations, upholding the highest hygiene standards.Collaborate with the culinary team to refine processes and boost productivity.QualificationsMinimum of 3 years of demonstrated experience as a Back of House Manager or in a similar role within a high-volume kitchen.Exceptional leadership and team management skills, with a commitment to staff training and development.Thorough understanding of food safety regulations and kitchen hygiene standards.Outstanding organizational and multitasking abilities, with a strong attention to detail.Strong communication skills and a collaborative spirit to work effectively with the kitchen team.Legal eligibility to work in the UK and willingness to work flexible hours, including evenings and weekends.BenefitsCompetitive Compensation: Indicative annual earnings of £37,500 (based on a 40-hour work week or £18/hour).Work Schedule: Full-time, 5 days, Monday to Friday, from 8am to 4pm (weekends off).Annual Leave: 28 days of holiday per year, including public holidays (pro-rata).Employee Perks: Meals during shifts, generous staff discounts, structured training, tastings, and clear career progression within a growing company.Pension: Participation in the company pension scheme.If you are passionate about quality ingredients, collaborative service, and the exciting atmosphere of Fitzrovia, we encourage you to apply now and explain why you would be a perfect fit for Motorino.

Are you passionate about cloud technology and seeking to leverage your skills in a dynamic environment? As a Hybrid Cloud Engineer at Syscogb, you'll play a crucial role in designing, implementing, and maintaining hybrid cloud solutions that enable our clients to achieve operational excellence. Collaborate with cross-functional teams to integrate new cloud technologies and optimize existing infrastructures.

Join our dynamic team at Ratio Recruitment Ltd as a Front End Developer in London! We are seeking a talented individual who is passionate about creating engaging and user-friendly web interfaces. In this role, you will collaborate with designers and back-end developers to deliver high-quality web applications that enhance user experience.

Who are we?At Ki Insurance, we are at the forefront of innovation in the insurance industry. We insure a diverse range of entities from space shuttles and world tours to wind farms and even footballers’ legs. Our mission is to digitally disrupt and revolutionize an industry that has stood for 335 years.In collaboration with Google and UCL, we have developed a cutting-edge platform utilizing algorithms, machine learning, and large language models to provide insurance brokers with quotes in mere seconds instead of days.Proudly recognized as the world’s largest algorithmic insurance carrier, we have emerged as the fastest-growing syndicate in the Lloyd's of London market, achieving a remarkable $100 million in profit within our first three years.With a team of diverse backgrounds, we work collaboratively in an agile environment to deliver the best possible experience for our customers. Ki Insurance has ambitious plans for the future, and we are on the lookout for exceptional individuals who are ready to challenge the status quo and reach new heights.What will your role involve?If you are passionate about providing high-quality user-centric services, we want you! As a Senior End User Computing Engineer, you will be instrumental in designing, managing, and evolving the entire lifecycle of our end-user devices. You will ensure that our laptops, mobiles, and collaboration tools are secure, efficient, and aligned with our business objectives. This hands-on role demands a balance of technical expertise, user empathy, and operational excellence.Join us to make a significant impact, drive innovation, and help shape the future of our digital workplace.Your responsibilities will include: Overseeing the full lifecycle of End User Computing (EUC) assets, including procurement, provisioning, refresh, and secure disposal.Leading 2nd and 3rd line support for EUC technologies while mentoring service desk teams and enhancing their technical capabilities.Administering Intune and driving endpoint compliance, security baselines, and Mobile Device Management (MDM) / Mobile Application Management (MAM) strategies.Monitoring application packaging, patching cycles, and device performance.Managing meeting room and collaboration technology, supporting AV infrastructure, and facilitating in-office events.Championing documentation, automation, and operational excellence throughout EUC services.Supporting Ki’s IT transformation by helping shape our independent digital estate and internal best practices.

About Blockchain.com Blockchain.com connects people to the world of cryptocurrency. Since 2011, the company has supported over 90 million wallet holders and more than 40 million verified users, processing more than $1 trillion in transactions. Role Overview The Institutional team at Blockchain.com is looking for a Front-End Engineer based in London. This group focuses on building tools and experiences for institutional clients in the crypto space. What You Will Do Collaborate with colleagues to deliver front-end solutions for institutional products Contribute to a culture that values courage, productivity, and continuous improvement Work to optimize processes and deliver results that matter Grow your skills by learning from others and sharing knowledge What We Look For Strong interest in front-end engineering and digital assets Team player who values collaboration and learning Commitment to high standards and impactful work Based in London or willing to work from the London office