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UX Researcher – HIRING ASAPStart date: ASAP Duration: 10-month contract Location: Hybrid working in London office.Rate: £350 - £500 per day outside IR35 SummaryWe’re seeking a UX Researcher to support our clients’ product teams in delivering user-centred solutions. This contingent role offers the opportunity to collaborate with cross-functional partners, conduct research, and provide actionable insights to inform product development.ResponsibilitiesDrive end-to-end research projects, from scoping to analysis.Design and execute qualitative user research studies to inform product decisions.Analyse research data and synthesize findings into clear, actionable recommendations.Run usability testing programs in close collaboration with other UX ResearchersCollaborate with product managers, designers, and engineers to integrate user insights into the development process.Present research findings to stakeholders in a clear and compelling manner.Key SkillsProficiency in a range of research methodologies (e.g., interviews, usability testing, concept evaluation).Strong analytical, communication, and presentation skills. - Ability to work independently and manage multiple projects simultaneously.3-5 years of experience conducting user research in a technology or product-focused environment.Bachelor’s degree in human-Computer Interaction, Psychology, Social Sciences, or a related field.Ability to work independently and manage multiple projects simultaneously.Must be authorized to work in the United Kingdom.Nice to have skills.Previous experience in rigorous usability testingPrevious experience working in the reality labs.

Cloud Engineer 37256 Duration: Initial 6 monthsLocation: 1 Waterside, Kingswood Ave, Dublin Ireland ,3 weeks working from home, 1 week in officeRate: €350 – €400 per day Our DevOps team supports AWS cloud deployment, cloud administration and maintenance and audit compliance for the business unit. The associate will join the team as a Senior DevOps engineer. The team member will perform the following:work with application team to support their application deployment.develop common pipeline utilities to be used by other teams.manage AWS cloud accounts and perform routine maintenance.create code templates and document standard procedures.monitor infrastructure components for cost and performance.provide on-call support on a scheduled rotation. The Expertise and Skills You Bring:bachelor’s degree in computer science or equivalent experience.6-9 Years overall industry experience in software development, some with Python, NodeJS, or Java and a focus on SDLC and automation.2-5 years of experience in Cloud development (AWS) and migration skills; Experience with building and operating highly resilient platforms in AWS cloud environments.1-3 years of experience working with containers (Kubernetes) and serverless applications (Lambda, SQS, DynamoDB, S3).Understanding of SRE (Site Reliability Engineering) principles with supporting skills and experience in creating scalable and reliable software systems. Working experience with Infrastructure as Code -- Terraform, AWS Cloud Formation Templates.Hands-on experience with CI/CD pipelines using Jenkins Core. Scripting ability in PowerShell or Bash Shell Unix Scripting.Knowledge of basic sysadmin skills in Linux, Networking, Load Balancing. Good demeanor towards solving problems skills that span systems, network, and applications. Strong team focus with good relationship building skills work with broader distributed team. Strong written and verbal communications skills.

We are currently seeking an experienced Compiler Engineer to join a security client of ours on a permanent basis. This exciting opportunity will involve helping transform the security industry, removing the need for traditional CAPTCHA The role requires candidates to be based in the US, as the role is primarily remote, but will require quarterly travel to Indianapolis, Key Responsibilities:We are looking for a Compiler Engineer to help build a high-performance compiler written in Rust with selective components running in WASM. The compiler transforms JavaScript into a custom bytecode format that executes inside our own interpreter, designed for performance, portability, and advanced control-flow handling. You will work on the full pipeline, including parsing, IR transformations, optimization passes, and bytecode generation, while also contributing to the design and evolution of the interpreter itself. Desirable Requirements:  Strong background in Compiler Engineering – should have experience building compilers from scratchExperience with Rust and C  Expertise with browser engine architectureExperience with writing decompilers for CAPTCHA systems would be a plus but not required  The role offers the flexibility of a remote work arrangement and offers long-term earning potential with a strong compensation package, including equity and bonus.

We are currently seeking an experienced Compiler Engineer to join a security client of ours on a permanent basis. This exciting opportunity will involve helping transform the security industry, removing the need for traditional CAPTCHA The role requires candidates to be based in the US, as the role is primarily remote, but will require quarterly travel to Indianapolis, Key Responsibilities:We are looking for a Compiler Engineer to help build a high-performance compiler written in Rust with selective components running in WASM. The compiler transforms JavaScript into a custom bytecode format that executes inside our own interpreter, designed for performance, portability, and advanced control-flow handling. You will work on the full pipeline, including parsing, IR transformations, optimization passes, and bytecode generation, while also contributing to the design and evolution of the interpreter itself. Desirable Requirements:  Strong background in Compiler Engineering – should have experience building compilers from scratchExperience with Rust and C  Expertise with browser engine architectureExperience with writing decompilers for CAPTCHA systems would be a plus but not required  The role offers the flexibility of a remote work arrangement and offers long-term earning potential with a strong compensation package, including equity and bonus.

Backend Architect | Python | AI start-up | Germany (remote, onsite 1 x quarterly)I'm partnered with an AI start-up backed by fresh funding looking for a Backend Python Architect.The team is senior, engineering-led, and drawn from top-tier tech environments, with experienced leadership and real technical ambition.You are a backend architect or very senior Python engineer who enjoys starting with a clean slate. You’ll define backend architecture, APIs, and data models, designing systems that are scalable, secure, and built for low-latency, data-intensive workloads. You’ll work closely with infrastructure on Kubernetes-based orchestration and collaborate daily with frontend and UI UX to deliver a cohesive end-to-end platform.You have strong Python experience in production systems and a deep understanding of distributed systems, modern backend frameworks, and architectural trade-offs. You care about security, observability, and resilience, and you’re comfortable guiding technical decisions across teams.Added bonus if you have experience in Kafka or RabbitMQ, WebSockets or server-sent events, Prometheus or ClickHouse, and databases such as PostgreSQL, Redis, or MongoDB.Why this role stands out• Architect a complex AI backend from day one• Senior team from leading global tech companies• Competitive salary with flexibility and equity options• Flat structure with real technical ownershipIf you enjoy building serious backend systems and want to do it at the right moment in an ambitious AI company, let’s talk.

Full-Stack Developer – HIRING ASAP Start date: ASAP Duration: 12-month contract Location: 1 week in Dublin office, 3 weeks working from homeRate: €300 - €400 per day ResponsibilitiesAs a Senior Engineer, you will play a key role with Scrum teams and within Digital Platforms Technology. You will be encouraged to gain an understanding of all the components of our web applications and will work with the members of the squad to deliver outstanding customer experience solutions.The ideal candidate should show ease at making personal connections and enjoy partnering across a diverse group of roles. You will work closely with the Squad Lead, Scrum Master, Developers, Quality Assurance, and Architects, across technical leadership to craft, build, test, and deliver the features that make up our clients’ digital experiences. You will also be expected to provide guidance and mentoring to the other Developers.Key SkillsRelevant knowledge of modern application architecture patterns and emerging technologiesDetailed experience with modern SPA JavaScript frameworks (Angular, Vue, React JS), preference for Angular.Extensive experience in Java / Spring boot / Spring Core / Web Services (REST) / Kubernetes orchestrationGeneral experience of Api management using Swagger and OpenAPI with knowledge in Integration Technology Java CamelClient-side language, library, and framework proficiency: Angular, JavaScript/TypeScript, Node, NPM, HTML, CSS/SASS, RxJS, Jasmine/Karma/Storybook/PlaywrightAppreciation for and alignment to standard methodologies regarding object-oriented design, coding standards, RESTful service consumption and integration, common design patterns, secure application development, and test coverageApplication build, deploy using Continuous Integration/ Deployment (CI/CD) tools – Jenkins Core, Maven, and maintenance of pipelines.Expert understanding of docker, cloud-computing / cloud services platforms. With AWS being favourable.

Staff Engineer / API Lead — Mission-Driven AI Startup (New York City) Want to own the core APIs powering an AI product used by millions around the world? A fast-growing language learning startup (name currently under wraps 🤫) is gearing up for a pivotal 2025 and needs a Staff Engineer / API Lead to architect, build, and scale the heart of their platform. If you're the kind of engineer who loves big technical challenges, thrives in high-output environments, and wants your work to have real human impact - this is the place. What You’ll DoOwn the design and evolution of the company’s core APIs, from architecture to implementationBuild scalable, reliable backend services that power real-time, AI-driven learning experiencesLead technical direction across teams; set standards, review designs, mentor engineersDrive platform performance, observability, cost optimisation, and cloud infrastructure decisionsCollaborate directly with product and engineering leadership to shape the roadmapStay hands-on: writing high-impact code, improving systems, and solving tough technical problemsWhy This Role Is UniqueYou will literally own the backbone of the platform—the APIs that everything else relies onJoin during a defining hyper-growth phase where technical decisions have huge leverageHigh autonomy, high trust, and the chance to influence engineering culture from the ground upDirect collaboration with founders and engineering leadershipMission-first environment focused on unlocking learning for kids everywhereWhat You Bring7–10 years of backend or distributed systems experience, ideally at scaleDeep expertise with AWS, including services, architecture patterns, and cost-aware designStrong experience with Kubernetes, containers, and modern cloud infrastructureProven experience designing and scaling APIs (REST, GraphQL, gRPC—any production-grade interface)Strong coding skills in Python, Go, or similar backend languagesExperience influencing or leading technical direction across teamsStartup-ready mindset: ownership, speed, and a bias for high-impact executionBonus: Familiarity or interest in Rust for systems-level or performance-sensitive componentsWho You AreA strategic thinker who still loves writing codeSomeone who enjoys architecting complex systems and making them elegantA force multiplier—your impact makes the whole team faster and betterComfortable in fast-paced, ambiguity-heavy environmentsDrawn to mission-driven work where the results matterLocation & EligibilityHyrbid in New York City (this role requires close collaboration with the founding and engineering teams)Full US work authorization required (no sponsorship)If you want to build core systems, shape engineering standards, and see your work translate into life-changing tools for kids learning languages—this is the opportunity.

Engineering Manager — Mission-Driven AI Startup (New York City) Ready to help build something that actually matters? A fast-growing AI language learning startup (name kept quiet for now 🤫) is entering a key period of growth - and they’re looking for a hands-on Engineering Manager to shape the product, the engineering org, and the future of a company with real social impact. If you thrive in high-intensity environments, love ownership, and want your work to genuinely change people’s lives, this is the one. What You’ll DoLead architecture, engineering execution, and delivery across multiple teams as the organisation scalesStay hands-on: design systems, review code, build key components, and guide technical decisionsOwn cloud infrastructure and platform strategy—AWS, Kubernetes, cost optimisation, scalabilityRecruit, mentor, and develop high-performing engineers; build a culture of output and accountabilityPartner directly with founders on product vision and long-term strategyBe a core driver of the engineering organisation during its most pivotal yearWhy This Role Is UniqueMission with real impact: building AI-powered language tools for kids worldwideLeadership at a defining moment - your decisions directly influence the company’s 2025 successHuge scope: architecture, hiring, people management, technical strategy, hands-on codingA chance to design and lead multiple engineering teams from the ground upA high-agency environment where great engineering leadership moves the companyWhat You Bring7–10 years of engineering experience, including leadership of multiple teams or teams-of-teamsStrong technical foundations in backend and distributed systems - specifically with Python. Deep experience with AWS, Kubernetes, containers, scaling, and platform reliabilityProven ability to balance IC-level technical work with people leadershipStartup-ready mindset: high output, proactive ownership, bias toward actionBonus: Experience or interest in RustWho You AreYou’ve led engineers and shipped large-scale systemsYou can zoom out to strategy and zoom in to codeYou build high-performing teams and a strong engineering cultureYou love fast-paced, high-impact workYou want your leadership to matterLocation & EligibilityMust be based in New York City or able to work on-site thereFull US work authorization required (no sponsorship)If you're a builder, a leader, and someone who wants to leave a mark on a company with real purpose—this is a rare moment to step in and shape everything that comes next.