At a Glance
- Tasks: Lead the development of innovative voice-based authentication technology and integrations.
- Company: Join Voxmind, a pioneering tech company focused on digital identity solutions.
- Benefits: Founding-level equity, remote work, and direct collaboration with industry experts.
- Other info: Dynamic start-up environment with significant career growth opportunities.
- Why this job: Be at the forefront of AI and blockchain technology, shaping the future of digital identity.
- Qualifications: 6+ years in full-stack development with experience in IAM/SSO integrations.
The predicted salary is between 48000 - 72000 € per year.
Company Description
Voxmind is building the next generation of digital identity, a voice-based authentication platform that verifies humans, not devices. Our patented AI voice biometrics and real-time deepfake detection technology deliver secure, language-agnostic, and frictionless authentication across banking, government, telecom, and healthcare.
Role Description
We are looking for a Founding Full-Stack Engineer to lead the development of Voxmind’s core integrations, decentralized identity layer, SDKs, and AI agent authentication infrastructure. You’ll work directly with the CTO to design, architect, and deliver technology that connects enterprise systems with decentralized identity and AI-driven continuous verification.
Location: Remote (UK/EU preferred)
Type: Full-time | Founding Team Member | Salary + Equity
Key Responsibilities
Identity & Integration Engineering
- Design, build, and scale Voxmind’s core API and SDK ecosystem (Node.js, Go, Python, TypeScript).
- Develop enterprise-grade integrations with IAM/SSO platforms such as Okta, Auth0, Azure AD (Entra ID), PingIdentity.
- Architect secure OAuth2, OIDC, and SAML authentication flows and role-based access control frameworks.
- Lead integration of multi-tenant and single-tenant deployments for enterprise clients, supporting private VPC and on-prem setups.
- Build automation for onboarding clients via self-service developer sandbox and API key issuance.
AI Agents & Continuous Authentication
- Design AI agent APIs capable of continuous, background authentication during conversations or workflows.
- Collaborate with ML engineers to embed biometric and risk signals into autonomous AI agent pipelines.
- Develop event-driven workflows for proactive fraud detection and adaptive access control using AI reasoning.
Platform & Developer Experience
- Build and maintain Voxmind’s developer portal, documentation hub, and sandbox environment.
- Ensure high standards of security, reliability, and observability across all services (OpenTelemetry, CI/CD pipelines).
- Establish engineering best practices for versioning, SDK release cycles, and developer feedback loops.
KYC, Telecom, and Workflow Integrations
- Build plug-and-play connectors for KYC/AML verification services (Onfido, Trulioo, SumSub).
- Integrate Voxmind’s APIs into telecom and IVR platforms such as Genesys, Twilio, and Avaya for voice-based customer verification.
- Create modular components for rapid deployment in contact centers and mobile onboarding flows.
Decentralized Identity & Blockchain Layer
- Implement Decentralized Identifiers (DIDs), Verifiable Credentials (VCs), and Zero-Knowledge Proofs (ZKPs) within Voxmind’s authentication framework.
- Integrate with Web3 wallets and blockchain-based identity networks (e.g. ION, PolygonID, EBSI).
- Develop hybrid workflows to bridge Web2 SSO with Web3 decentralized identity standards.
- Contribute to architecture for secure credential issuance, revocation, and verification APIs.
Requirements:
- 6+ years in full-stack or backend development (Node.js, Go, TypeScript, or Python).
- Proven experience integrating with IAM/SSO platforms (Okta, Auth0, Azure AD, Ping).
- Deep understanding of OAuth2, OIDC, SAML, JWT, and enterprise identity flows.
- Familiarity with blockchain, SSI, DID, and VC standards (W3C, DIF, EBSI).
- Experience with AI or ML system integrations, especially AI agent frameworks (LangChain, OpenAI API, or custom inference pipelines).
- Hands-on experience building APIs, SDKs, and microservice architectures for scale.
- Knowledge of security and compliance standards (GDPR, ISO27001, SOC2).
- Early-stage start-up experience, comfortable owning end-to-end technical delivery.
Success in the first 12-18 months
- Launch enterprise-ready Voxmind APIs and SDKs with IAM/SSO integrations.
- Deploy decentralized identity resolver and credential verification layer.
- Deliver telecom and KYC connectors used in pilot programs.
- Release continuous authentication APIs for AI agent workflows.
- Establish developer portal and automation for partner onboarding.
What you will get:
- Founding-level equity and influence on product and architecture.
- Direct collaboration with CTO, AI researchers, and blockchain engineers.
- Opportunity to pioneer a global decentralized identity infrastructure.
- Exposure to enterprise pilots in finance, government, and telecom sectors.
- Cutting-edge environment bridging AI, blockchain, and voice biometrics.
Join us to help build the foundation for trusted digital identity in the AI era.
Apply: careers@voxmind.ai
Full Stack Engineer in London employer: Voxmind
Voxmind is an exceptional employer for those seeking to make a significant impact in the tech industry, particularly in the realm of digital identity and voice biometrics. As a founding team member, you will enjoy the benefits of equity ownership, direct collaboration with industry leaders, and the opportunity to shape innovative solutions in a cutting-edge remote work environment. With a strong focus on employee growth and a culture that values creativity and autonomy, Voxmind offers a unique chance to pioneer advancements in AI and blockchain technology while contributing to meaningful projects across various sectors.
StudySmarter Expert Advice🤫
We think this is how you could land Full Stack Engineer in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with potential colleagues on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those related to full-stack development and AI integrations. This will give potential employers a taste of what you can do and set you apart from the crowd.
✨Tip Number 3
Prepare for interviews by practising common technical questions and coding challenges. Brush up on your knowledge of OAuth2, SAML, and the tech stack mentioned in the job description. Confidence is key, so get comfortable talking about your experience!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the Voxmind team and being part of something groundbreaking.
We think you need these skills to ace Full Stack Engineer in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that match the Full Stack Engineer role. Highlight your experience with Node.js, Go, TypeScript, and any IAM/SSO platforms you've worked with. We want to see how you can contribute to our mission!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Share your passion for digital identity and voice biometrics, and explain why you're excited about joining Voxmind. Let us know how your background aligns with our goals and what unique perspectives you bring.
Showcase Your Projects:If you've worked on relevant projects, whether personal or professional, make sure to include them. We love seeing real-world applications of your skills, especially in areas like AI integrations or decentralized identity. It gives us a glimpse into your problem-solving abilities!
Apply Through Our Website:We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you don’t miss out on any important updates. Plus, it shows us you're keen on being part of the Voxmind team!
How to prepare for a job interview at Voxmind
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, like Node.js, Go, and TypeScript. Brush up on your knowledge of IAM/SSO platforms and authentication flows, as these will likely come up during technical discussions.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous roles, especially related to API development or integration. Use the STAR method (Situation, Task, Action, Result) to structure your answers and highlight your problem-solving abilities.
✨Understand Decentralised Identity
Familiarise yourself with concepts like Decentralised Identifiers (DIDs) and Verifiable Credentials (VCs). Be ready to discuss how these technologies can be integrated into existing systems, as this is a key part of the role at Voxmind.
✨Ask Insightful Questions
Prepare thoughtful questions about Voxmind’s vision for digital identity and how they plan to tackle challenges in the industry. This shows your genuine interest in the company and helps you assess if it’s the right fit for you.
