Full-stack Engineer

• Own Poolside's multimodality direction and capability adoption
• Ship our first image-input capabilities
• Chart and drive the path from adapter-based to native multimodality
• Collaborate on custom evaluations and datasets for multimodal SWE capabilities
• Run experiments end to end: hypothesis, implementation, training at scale, analysis
• Partner with evals, architecture, data, and post-training teams to land multimodality in Poolside models

Engineering Lead – Multimodality, Research

• Own features end-to-end: shape solutions with product and design, build across the API and the UI, ship to production to create outcomes, not just deliver tickets
• Lean into your specialism - whether that's backend architecture, data modelling and performance, or frontend architecture, accessibility and user experience - and act as the go-to person for it on your team
• Design and develop backend services using Python and Django, including the data models and RESTful APIs that power our financial products
• Build high-quality, reusable frontend features using TypeScript and React
• Write clean, testable code with strong test coverage across the stack (pytest on the backend; Storybook/Chromatic, Playwright and Vitest on the frontend)
• Participate in code reviews on both sides of the stack in order to share knowledge and improve the quality of our solutions
• Monitor and maintain production systems, ensuring reliability, performance and security

Full Stack Software Engineer

• Design and implement new features across the stack (Node.js, ReactJS, and React Native), with a strong focus on usability, clarity, and real user value, shaping APIs and GraphQL contracts as part of the feature design process.
• Spend the majority of your time in your area of deep expertise, while regularly contributing across the web app, the backend, and the mobile app — picking up features, smaller tasks, and code reviews wherever they're needed.
• Build and evolve backend services and APIs (REST and GraphQL) that power our platform. Focus on reliability, maintainability, and clean integrations with frontend applications and third-party services.
• Work closely with Product Managers and Designers to translate requirements into practical, well-scoped technical solutions.
• Contribute to Engineering Requirement Documents (ERDs) that define data models, API contracts, and integration points before implementation begins.
• Write clean, readable, and well-tested code. Participate in code reviews and contribute to shared standards around quality, testing, and maintainability. Improve existing systems where it provides clear product or developer value.
• Take responsibility for the features you build. Identify issues or gaps, propose improvements, and iterate based on feedback. You're comfortable working with some ambiguity and adapting as requirements evolve.
• Break down product requirements into data models, GraphQL types, and component structure before writing implementation code.

Senior Product Engineer, Typescript

• Design, build, and maintain a robust browser extension for Chrome, Edge, and other major browsers using Manifest V3 and modern APIs.
• Implement features that securely interact with web content and backend services, ensuring compliance with security best practices.
• Optimize performance and reliability across diverse environments and user workflows.
• Work closely with the endpoint agent and backend teams to ensure tight integration and consistent functionality across endpoints and services.
• Stay ahead of evolving browser APIs, security standards, and extension ecosystem changes.
• Participate in code reviews, testing, and continuous improvement of development processes.

Principal Software Engineer – Browser Extension

• Conduct verification of customer software using provided technical documentation
• Achieve software builds across various programming languages
• Identify, diagnose, and resolve build issues, ensuring software meets quality standards
• Perform additional feature testing where required to confirm the built software behaves as documented
• Analyze software requirements and technical documentation to understand build processes and dependencies
• Communicate effectively with team members and clients to understand requirements and provide updates
• Stay updated with emerging technologies and programming languages relevant to software verification
• Contribute to the continuous improvement of verification processes and practices

Software Verification Engineer

• Design and implement new iOS features with a strong focus on usability, clarity, and delivering value to real users.
• Build and maintain robust, scalable mobile architecture (including networking, data persistence, and state management) that supports fast iteration and long-term maintainability.
• Work closely with Product Managers and Designers to translate requirements into practical, well-scoped technical solutions. Provide input during planning to ensure features are feasible, maintainable, and aligned with user and business goals.
• Ensure high-quality releases through clean, readable, and well-tested code. Participate in code reviews and contribute to shared standards around quality, testing, and maintainability.
• Take ownership of the features you build. Identify issues or gaps, propose improvements, and iterate based on feedback. You’re comfortable working with ambiguity and adapting as requirements evolve.
• Improve app performance and reliability by diagnosing bottlenecks, addressing crashes, and strengthening overall stability and user experience.

Senior iOS Engineer

• Lead detection development: achieve full MITRE coverage, maintain low false-positive and false-negative rates. Work closely with alerts consumers (20+ teams) to keep noise low and signal high, ensuring they can act quickly without missing genuine threats.
• Architect and operate detection coverage across our cloud and bare-metal environments.
• Build and extend our internal D&amp;R tools and pipelines - onboard new logs, build and automate response runbooks.
• Integrate threat intelligence into detection logic and IR playbooks, tracking adversary TTPs relevant to Cloud infrastructure.
• Lead incident response end-to-end: scoping, containment, root cause analysis, post-incident reviews and controlling critical action items are closed to prevent future possible incidents.
• Partner with Compliance and Engineering teams to detect real threats while meeting the needs of both engineers and regulators.
• Define and report on D&amp;R metrics: MTTD, MTTR, detection coverage, false positive rates, etc.
• Build and maintain Security Incident Response program: people, processes, tools.
• Build tools, runbooks, and on-call processes that scale as the company grows.

Detection Engineering Lead

• Own and execute the end-to-end outbound strategy to identify, qualify, and win high-potential B2B deep tech startups as prospective Sparksense clients.
• Map out and actively attend premier industry trade shows, sector conferences, and regional innovation hubs across Europe to identify and develop new business opportunities.
• Build and run rigorous, data-driven research and prospecting campaigns utilising advanced tooling, including AI platforms.
• Secure client onboarding and coordinate ongoing project delivery alongside our senior advisor network to guarantee exceptional service and client retention.
• Cultivate deep relationships with European tech clusters, incubators, and accelerators to position Sparksense as their premier, go-to commercial acceleration partner.
• Partner directly with the Managing Director on key accounts, strategic commercial priorities, and regional growth initiatives.

Deep Tech Growth Lead

• Develop and maintain our SaaS platform using modern web technologies.
• Collaborate with product and design teams to build user-friendly and scalable solutions.
• Write clean, maintainable, and efficient code.
• Troubleshoot and debug applications.
• Stay up-to-date with emerging trends and technologies in web development.

Senior Full Stack Engineer

• Contribute to the architecture, design and development of a strong foundation of one of the platform services for domain specific products that are scalable, performant, and flexible to accommodate new consumer requirements.
• Take ownership for our application’s frontend and backend architecture
• Be creative and innovative to identify and apply solutions to the problem space and SDLC
• Take comprehensive responsibility for the service, overseeing its development, testing, deployment, operations and maintenance
• Follow best practices and ensure code coverage, CI/CD and meet security compliance requirements
• Be an excellent team player building strong relationships within the team and with cross-functional teams, following best practices for collaboration.

Senior Software Developer

• Your job is to build Alpaca's proprietary set of services to meet our users' expectations for high quality and performance in their advisory service (Block Trading, Portfolio management, IRA, etc).
• This opportunity is similar to joining AWS or Heroku in their early days, designing and architecting our platform by wearing many different hats in our small team.
• As an experienced engineer, you will write tons of code and make critical decisions about delivering the best experience to our customers.
• This certainly requires deep knowledge in both frontend and backend, databases and distributed systems, as well as broad experience from low to high level in CPU-level hardware for high throughput, robust concurrency system design, abstract distributed system architecture for high availability and object-oriented data modelling with long-term growth in mind.
• Joining an early-stage startup, the payoff to this highly demanding environment will be worth the effort.

Senior Software Engineer – Advisory Suite

• Take complete ownership and deliver major AI engineering features within agreed timelines.
• Own AI output quality, structure, and predictability across all user-facing AI interactions.
• Design, implement, and maintain output-type-based AI systems, including segmentation, routing, and enforcement.
• Ensure consistent output structure and formatting across different LLMs for the same request type.
• Integrate and orchestrate multiple LLM providers via OpenRouter, managing model selection, fallback strategies, and cost optimisations.
• Design and orchestrate tool-using and agentic AI workflows, defining clean tool contracts (including MCP-based tools), function-calling interfaces, and reliable AI-to-system integrations.
• Build and maintain complex, multi-step LLM workflows, including with orchestration frameworks such as LangChain or LlamaIndex, for advanced reasoning, context reuse, and retrieval.
• Design and manage production prompt systems with dynamic prompting, context injection, and conditional logic.
• Own the deployment and release of LLM experiments, prompt management, and Langfuse-based evaluation pipelines.
• Run A/B tests across models, analyse results, and present data-driven impact assessments of AI features and experiments.
• Monitor AI system metrics, quality signals, latency, and release health using Langfuse and other observability tools.
• Deep-debug complex LLM chains using Langfuse traces, identifying bottlenecks and optimising for cost, latency, and context-window usage, and build output-scoring systems to root-cause hallucinations and logic errors.
• Write clean, scalable, and maintainable TypeScript code across the Next.js and Node.js stack.
• Build reliable backend logic for AI systems, with strong error handling, request validation, fallback flows, and predictable behaviour in production, including reliable tool execution and AI-to-service integrations.
• Ensure high code quality through testing, code reviews, and clear engineering standards.
• Monitor, troubleshoot, and improve production performance, reliability, and system health.
• Drive maintainability and technical quality through solid architecture, refactoring, and disciplined release practices.

Senior AI Software Engineer

• Diseñar y construir aplicaciones web de extremo a extremo, cubriendo frontend, backend y nube.
• Desarrollar y mantener APIs y microservicios escalables.
• Implementar mecanismos robustos de autenticación y autorización.
• Construir interfaces de usuario accesibles y responsivas con alto rendimiento.
• Desplegar, monitorear y mantener aplicaciones en entornos de nube.
• Colaborar con equipos multifuncionales.

Fullstack Engineer, Developer

• Build, ship, and iterate on core product features across the stack.
• Take ownership of features assigned to you — from implementation through production rollout and iteration.
• Implement responsive, accessible UIs using TypeScript, TailwindCSS, and established design systems.
• Work with backend services and APIs, integrating frontend logic with scalable systems.
• Participate actively in code reviews and contribute to maintaining high engineering standards.
• Debug, optimize, and improve production systems in a high-traffic environment.
• Communicate blockers, risks, and progress early and clearly.
• Work closely with Product and the rest of the engineering team to support fast, iterative delivery.

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