Ventula Consulting

Senior Android Engineer (Native Integration & Security) We are seeking an exceptional Senior Android Engineer to join a newly-founded joint venture backed by five of the world's leading telecommunications companies. Our mission is to restore trust in voice communication by building a network-native intelligence layer to combat the global epidemic of voice fraud and AI-driven scams. In this role, you will be the owner of our most critical, user-facing feature: the Telco-Verified Security Shield. You will be responsible for the magic moment of our product, delivering an instant, network-verified trust indicator to a user's device in the moments before they answer the call. This is not a standard mobile app role; it is a deep, Real Time systems challenge that requires you to architect and implement a high-performance, secure, and reliable solution that integrates directly with the Android operating system's native call-handling services. Your primary objective is to own the client-side implementation of our sub-500ms Time-to-Trust (TtT) metric. You will be the driving force behind the trust in our product, working at the intersection of native mobile engineering, Real Time data processing, and client-side security. This position offers a unique opportunity to build a category-defining security product from the ground up, leveraging proprietary, network-level data that no pure-OTT competitor can access. Key ResponsibilitiesNative OS Integration & Performance Architect, build, and own the entire native call interception flow using Android's CallScreeningService to intercept and analyze calls as they ring. Design and engineer the high-performance Trust Indicator overlay, obsessing over every millisecond of client-side processing to ensure we meet our strict sub-500ms Time-to-Trust (TtT) metric. Implement the client-side logic to consume and display Explainable AI reasoning (eg, Recent SIM Swap Detected, Verified Business) provided by our Back End services. Build a robust, efficient, and scalable client-side API integration layer to consume Real Time security signals (like our proprietary Scam_Score) from the AI Core. Security & Quality Implement and champion our mandatory Zero Trust security architecture at the client level, ensuring all network data and user PII are handled with the highest level of security. Define and enforce best practices for performance, code quality, and testing for the entire Android security stack. Work closely with the QA Engineer to build test harnesses and instrumentation to rigorously validate the sub-500ms latency target and ensure a false-positive rate of less than 1%. Cross-functional Collaboration Partner with the Senior Backend Engineer (Application & AI Orchestration) to define the API contracts and Real Time data flow needed to power the Security Shield. Collaborate with the UX/UI Designer to iterate on a seamless, intuitive, and trustworthy user experience for the trust indicator and its explanations. As a foundational engineering hire, you will help define our Android engineering culture, mentor future hires, and set the standard for technical excellence. Required QualificationsEducation & Experience Bachelor's degree in Computer Science, Engineering, or a related field. 5+ years of hands-on experience in native Android development, with a portfolio of high-performance, public-facing applications. Required Technical & Android Skills Expert-level, production-grade experience with native Android development (Kotlin required). Demonstrated, deep expertise with Android's native call-handling APIs, specifically the CallScreeningService framework. This is a critical, non-negotiable skill for this role. Proven experience building high-performance, Real Time user interfaces that are deeply integrated with the Android OS. Strong understanding of mobile security principles and best practices, including secure data storage, network communication (mTLS), and threat modelling. Proficiency in consuming RESTful APIs and Real Time data streams (eg, WebSockets) in a mobile environment. Strong understanding of Android performance profiling tools and techniques to debug and optimize for latency. Experience with multi-threaded and asynchronous programming on Android. Preferred Qualification Advanced Education & Industry Experience Master's degree in Computer Science or a related field. Previous experience in the telecommunications, cybersecurity, or anti-fraud/anti-spam industries. Experience building applications for a global audience with localization and compliance requirements. Experience with the Android NDK (C++) for performance-critical operations. Familiarity with Real Time audio processing on Android. Deep knowledge of mobile network protocols and security. Experience building or integrating SDKs. Advanced Systems & Security Expertise This is a permanent position with hybrid working of two days a week in the central London office and the rest WFH. The salary is very much Dependent on experience with a guide between £110k-£140K basic + package.

Senior Android Engineer (UI/UX & Welcome Manager) Overview We are seeking an exceptional Senior Android Engineer to join a newly-founded joint venture backed by five of the world's leading telecommunications companies. Our mission is to restore trust in voice communication by building a network-native intelligence layer to combat the global epidemic of voice fraud and AI-driven scams. This is a rare opportunity to be a foundational hire, shaping the future of a product designed to protect hundreds of millions of users. We are building two core products: the Telco-Verified Security Shield (our primary, pre-call fraud detection) and the Personal Welcome Manager (our premium, AI-powered call screening experience). As the Senior Android Engineer for the Welcome Manager, you are the User-Facing Owner of our AI innovation showcase. This isn't just another UI/UX role; you will be the primary architect of a novel conversational interface. Your challenge is to build the magic: the live transcription, the mid-call intervention, the post-call summaries, that defines our premium user experience. You will own the app that we will showcase to the world at Mobile World Congress (MWC) 2026, and your work will be the primary driver for our monetization strategy. Key Responsibilities Conversational UI Architecture: Own the end-to-end development of the Personal Welcome Manager's conversational interface on Android. You will build a fluid, intuitive, and polished user experience from the ground up. Designer-in-Lockstep Collaboration: Work hand-in-glove with our dedicated UX/UI designer, engaging in rapid daily iteration to translate high-fidelity, interactive prototypes into pixel-perfect, production-ready code. Real Time Data Streaming: Engineer the high-performance live transcript view, which displays the AI-screened conversation as the phone is ringing. This involves consuming Real Time streaming text data from our Back End AI orchestration layer via WebSockets. Mastering Perceived Performance: Implement the critical mid-call intervention feature, allowing a user to seamlessly accept a call from the AI agent. You will become an expert in designing for our < 1000ms V2V (voice-to-voice) latency budget, ensuring the entire UX flow feels fast and responsive. API & Backend Integration: Partner with our Back End (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries. MWC Demo Ownership: Be directly responsible for the polish, stability, and performance of the Welcome Manager application for its critical debut at MWC 2026. Cross-Functional Partnership: Collaborate closely with the other Senior Android Engineer (who owns the native CallScreeningService and Security Shield overlay) to ensure a seamless and unified user experience between our two core products within a single application. Required Qualifications? Education & Experience ? Bachelor's degree in Computer Science or a related field, or equivalent practical experience. ? 5+ years of hands-on experience in native Android development, with a strong portfolio of shipped, consumer-facing applications. ? Required Technical & UI/UX Skills ? Deep expertise in native Android UI/UX development, including Kotlin and modern frameworks (eg, Jetpack Compose, Coroutines, Flow). ? Demonstrated experience building complex, Real Time, data-intensive user interfaces (eg, chat applications, financial dashboards, Real Time streaming apps). ? Strong experience integrating with Back End APIs and services, particularly consuming Real Time data via WebSockets, gRPC, or similar protocols. ? Proficiency in translating high-fidelity designs (eg, Figma, Sketch) into beautiful, performant, and maintainable code. ? A strong understanding of Android UI performance optimization, memory management, and threading models. ? Experience with the full mobile development life cycle, from ideation and prototyping to testing, release, and maintenance. Preferred Qualifications ? Advanced UI/UX & Conversational AI ? Prior experience designing or building conversational interfaces (eg, chatbots, voice assistants). ? A strong portfolio that explicitly showcases beautiful, complex, and highly responsive mobile UIs you have built. ? Relevant Technical Experience ? Familiarity with Android's native call-handling APIs (eg, CallScreeningService, ConnectionService), as you will be integrating closely with the engineer who owns this. ? Experience with performance testing and profiling Android applications to hunt down and eliminate bottlenecks. ? Knowledge of mobile application security best practices. ? Industry & Environment ? Previous experience working in a fast-paced, agile startup environment. ? Experience in the telecommunications or voice AI space. This is a permanent position with hybrid working of two days a week in the central London office and the rest WFH. The salary is very much Dependent on experience

Senior Backend Engineer (Golang) Overview We are seeking a deeply technical and security-minded Senior Backend Engineer to join a newly-founded, high-impact AI joint venture. Backed by five of the world's leading telecommunications giants, our mission is to restore trust in global voice communication. Our mission is to restore trust in voice communication by building a network-native intelligence layer to stop fraud and create a new category of secure, AI-powered user experiences. We are a Phase 2 company, meaning we are building the foundational engineering team that will define our culture and our success. This role is the Core Logic Owner for our flagship AI experience: the Personal Welcome Manager. While our Security Shield product leverages unique, pre-call telco data to provide sub-500ms trust indicators, the Welcome Manager is our AI innovation showcase and primary monetization driver. This product features an AI agent that screens unknown callers as they ring, provides a live transcript, and allows for mid-call user intervention. As the Senior Backend Engineer for Application & AI Orchestration, your central challenge will be solving the cumulative latency puzzle. You will be singularly responsible for orchestrating a best-in-class, buy, don't build AI stack (STT LLM TTS) to deliver a seamless, natural, and responsive voice-to-voice (V2V) experience, targeting a sub-1000ms latency from the moment a caller stops speaking to the moment our AI begins its response. You won't just be integrating APIs; you will be architecting the Real Time, high-throughput nervous system of our core AI product. Key Responsibilities AI Orchestration & Core Logic Own the end-to-end Back End architecture for the Personal Welcome Manager, our flagship conversational AI product. Design, build, and optimize the core AI orchestration pipeline (STT - LLM - TTS) to meet our 1000ms V2V latency target. Serve as the technical lead for our "Buy, Don't Build" AI strategy, integrating, managing, and evaluating third-party AI services from providers like Vapi, Deepgram, and Cartesia. Implement the core application logic for all Welcome Manager features, including intent-capture, post-call summarization with entity extraction, and error handling. API & Application Development Design, build, and scale the mission-critical, high-availability RESTful APIs that serve our mobile clients (Android-first). Architect and manage the Real Time streaming data flows (audio and text) required for the live transcription feature, utilizing technologies like WebSocket. Implement the Back End logic for user-facing features, such as mid-call intervention (allowing a user to accept a call during pre-screening). System Architecture & Quality Collaborate on the design of our cloud-native, microservices-based architecture to ensure all application services are scalable, resilient, and cost-efficient. Work with the Platform & Security engineer to ensure all services adhere to our mandatory Zero Trust security architecture and protect sensitive user data. Implement comprehensive monitoring, logging, and alerting for the entire AI pipeline, with a focus on our key latency (V2V), quality, and cost metrics. Cross-functional Collaboration Partner closely with the Senior Android Engineers to define robust API contracts and ensure a seamless, low-latency experience for the live transcript and mid-call intervention features. Collaborate with the Senior Backend Engineer (Telco Integration) to consume and orchestrate the proprietary network signals that power our Security Shield. Work with the Product Manager and UX/UI Designer to translate complex product requirements and the 1000ms UX flow into a concrete technical reality. Collaborate with the DevOps Engineer on CI/CD pipelines, Kubernetes-based service deployment, and infrastructure scaling. Required Qualifications Education & Experience Bachelor's degree in Computer Science or a related technical field, or equivalent practical experience. 7+ years of hands-on experience in Back End development, building and maintaining high-availability, high-throughput systems in production. Technical & Backend Skills Expert-level proficiency and at least 5 years of production experience with C++ OR Go (Golang) . Strong, proven experience designing, building, and scaling high-availability RESTful APIs for mobile or web clients. Deep experience with distributed systems, microservices architecture, and event-driven patterns. Demonstrated experience with Real Time applications and data streaming technologies (eg, WebSockets, gRPC, Kafka). Experience integrating third-party AI/ML APIs (eg, LLMs, STT/TTS, or other complex services) into production systems. Experience with containerization (Docker, Kubernetes) and deploying/managing services on a major cloud platform (AWS, GCP, or Azure). This is a permanent position with hybrid working of two days a week in the central London office and the rest WFH. The salary is very much dependent on experience with a guide between £130k-£160K basic + package. Seniority Level Director Industry Telecommunications Information Services Technology, Information and Media Employment Type Full-time Job Functions Information Technology Skills REST

Senior Golang Software Engineer - AI Scale-up - Voice AI (Permanent - flexible salary) Senior Golang Software Engineer is now required by an Innovative AI scale up to build the strategic architecture platform for their AI product offering This role will be responsible for building a stable and replicable architecture for their core application, focusing on their AI tools in line for product launch. Key Responsibilities: Lead the development of architecture platform. Document API usage, technical specifications and architecture decisions. Implement the user interface for the entire customer/application journey. Implement secure on-device storage for sensitive data. Collaborate with Back End engineers to successfully integrate RESTful APIs for data collection and AI services. Key Requirements: Strong Senior Software Engineer experience Exceptional Go/Golang skills Experience working across low-latency and zero trust platforms Experience across more than 1 cloud platform (AWS, Azure and GCP), and designing microservice architectures on those platforms Proven track record designing systems that integrate multiple 3rd party API's Educated to degree level or equivalent experience This is a permanent opportunity with a flexible basic salary depending on experience and expertise. The company is looking to hire the best Go/Golang Engineers in the market. In terms of working structure this is hybrid with 1-2 days per week in their Central London office and the rest remote.

Payroll Manager - Doncaster - £50,000pa - 12 Month Fixed-Term Contract One of the UK's leading logistics organisations is seeking an experienced Payroll Manager to join them on a 12-month fixed-term contract. You will be responsible for overseeing the end-to-end delivery of all monthly payroll processes, ensuring accuracy, compliance, and efficiency across the function. Key Responsibilities: Manage and deliver the full end-to-end payroll cycle. Lead and support a small payroll team. Ensure compliance with statutory regulations and company policies. Act as a key point of contact for payroll-related queries across the business. Key Skills & Experience: Proven experience managing payroll operations end-to-end. Previous experience leading or managing a small team. Strong interpersonal and communication skills. Ability to work accurately under pressure and to tight deadlines. Contract Details: Duration: 12-Month FTC Salary: £50,000 pa Location: Doncaster (3 days onsite, hybrid working available) If you're an experienced Payroll Manager seeking your next exciting challenge within a leading logistics business, we'd love to hear from you - apply today!

Data Specialist - Geospatial - Reading (once a month onsite) - Up to £45,000 Data Specialist with strong geospatial expertise to join a market-leading environmental data and insights organisation. In this role, you'll bring extensive experience in ETL processes, with the ability to enhance and optimise on-premises workflows while driving automation and efficiency. As a key member of the Data Management & Operations team, you'll provide expert technical support and ensure the smooth resolution of BAU issues, including those related to PointX. The ideal candidate will have proven experience with SQL, Power BI, and private cloud environments, along with the ability to troubleshoot and resolve complex data challenges. You'll also have around 5 years' experience designing and managing ETL/ELT processes, with a strong track record of identifying efficiencies in existing data pipelines, ideally using technologies such as FME Form or Flow. Key Requirements: Geospatial data experience ETL processes SQL Python Private cloud-based data tooling FME form Location : Reading (Once a month) Salary : £45,000 plus benefits

Payroll Manager - Doncaster - £50,000pa - 12 Month Fixed-Term Contract One of the UK's leading logistics organisations is seeking an experienced Payroll Manager to join them on a 12-month fixed-term contract. You will be responsible for overseeing the end-to-end delivery of all monthly payroll processes, ensuring accuracy, compliance, and efficiency across the function. Key Responsibilities: Manage and deliver the full end-to-end payroll cycle. Lead and support a small payroll team. Ensure compliance with statutory regulations and company policies. Act as a key point of contact for payroll-related queries across the business. Key Skills & Experience: Proven experience managing payroll operations end-to-end. Previous experience leading or managing a small team. Strong interpersonal and communication skills. Ability to work accurately under pressure and to tight deadlines. Contract Details: Duration: 12-Month FTC Salary: £50,000 pa Location: Doncaster (3 days onsite, hybrid working available) If you're an experienced Payroll Manager seeking your next exciting challenge within a leading logistics business, we'd love to hear from you - apply today!

Payroll Manager - Doncaster - £50,000pa - 12 Month Fixed-Term Contract One of the UK's leading logistics organisations is seeking an experienced Payroll Manager to join them on a 12-month fixed-term contract. You will be responsible for overseeing the end-to-end delivery of all monthly payroll processes, ensuring accuracy, compliance, and efficiency across the function. Key Responsibilities: Manage and deliver the full end-to-end payroll cycle. Lead and support a small payroll team. Ensure compliance with statutory regulations and company policies. Act as a key point of contact for payroll-related queries across the business. Key Skills & Experience: Proven experience managing payroll operations end-to-end. Previous experience leading or managing a small team. Strong interpersonal and communication skills. Ability to work accurately under pressure and to tight deadlines. Contract Details: Duration: 12-Month FTC Salary: £50,000 pa Location: Doncaster (3 days onsite, hybrid working available) If you're an experienced Payroll Manager seeking your next exciting challenge within a leading logistics business, we'd love to hear from you - apply today!