Machine Learning Engineer – Speech Processing – EMEA
CloudWalk is a global financial technology company that pioneers AI and blockchain-driven solutions, including payment processing and digital banking, through its brands InfinitePay (Brazil) and JIM.com (U.S.).
Are you someone who builds just to see how far an idea can go? Do you enjoy breaking conventions, simplifying the overengineered, and questioning the status quo?
At CloudWalk R&D, we are creating space to rethink the fundamentals of digital experiences - so we can uncover what is truly worth building, and help shape what reaches production.
Our team is for people who chase ideas that will not let them sleep. Who prototype to explore, test the edges of what is possible, and bring bold concepts to life. If that sounds like you - we would love to meet you.
About the company:CloudWalk is a fintech company reimagining the future of financial services. We are building intelligent infrastructure powered by AI, blockchain, and thoughtful design. Our products serve millions of entrepreneurs across Brazil and the US every day, helping them grow with tools that are fast, fair, and built for how business actually works. Learn more at cloudwalk.io.
About the team:We are a small team within CloudWalk’s larger R&D effort, focused on bold ideas and new product directions. Our mission is to explore new concepts early, build fast, and uncover what is worth turning into real products. Sometimes that means prototyping features for existing experiences; other times, it means testing entirely new directions that could shape the future.
We learn through prototyping and fast iteration. Endless curiosity drives our exploration, and collaboration is at the core of how we work - whether we are building together or challenging each other’s thinking.
Your role:We are looking for an ML engineer with deep expertise in automatic speech recognition (ASR) and audio processing to help us bring real-time voice-driven interactions to life. You will be at the forefront of prototyping voice-to-action features - exploring how voice can drive more intuitive customer experiences.
You will:
- Design and implement the speech processing core of our prototypes - from ASR model selection to inference pipelines and tuning.- Collaborate with a mobile developer to integrate speech input into working prototypes.- Work closely with a performance-focused ML engineer to ensure low-latency, robust streaming pipelines under real-world constraints like noise and spotty connectivity.
This role combines deep knowledge of speech and ML systems with a builder’s mindset, and is ideal for someone eager to turn research into working, user-facing prototypes.
What we expect:
Our projects often start with ambiguity and evolve rapidly - so we look for people who are deeply curious, adaptable, and driven by the desire to make ideas real.
This role offers the opportunity to explore broadly - but it starts with a clear focus: building the foundations for voice-driven experiences. We are looking for someone with deep, hands-on expertise in speech and audio processing who is excited to apply that knowledge to shape new, intuitive ways for people to interact with technology.
Required skills:
- Speech & Audio Processing: Deep, hands-on experience with ASR and real-time audio processing. You know how to build streaming pipelines, handle noise and interruptions.- Machine Learning Expertise: Solid foundation in machine learning and deep learning - particularly for sequential data, with working knowledge of architectures like RNNs, CNNs, or Transformers in audio contexts.- Python & ML Engineering: Strong proficiency in Python, with the ability to build, debug, and tune ML pipelines using frameworks like PyTorch or TensorFlow.- MLOps Tooling: Experience with tools like MLflow, Weights & Biases, or other systems for model tracking, versioning, and lifecycle management.- Experimental Mindset: Ability to design and run meaningful experiments, interpret results carefully, and iterate based on what the data says - not assumptions.- Curiosity & Adaptability: A deep drive to explore new technologies, ask better questions, and stay flexible in the face of evolving requirements.
Nice-to-have skills:
- Conversational AI: Experience designing or experimenting with dialogue systems, intent workflows, or agent-like architectures.- Frontend Development: Understanding of how user interfaces are built (especially in Flutter) and interest in connecting backend intelligence to user-facing experiences.- Cloud Deployment Experience: Familiarity with deploying and managing ML models on Google Cloud.- Systems Efficiency: Awareness of strategies for performance tuning, edge deployment, or handling constrained environments (connectivity, device limits, etc.).
Our recruitment process:
Our process is designed to help us understand how you think, build, and collaborate. If you have a relevant GitHub repository, portfolio, or past project that reflects your work and interests, please share the link when you apply.
The process consists of three stages:
1. Take-home challenge: This is a short exercise designed to showcase your technical skills, development process, and problem-solving approach.2. Technical interview: This in-depth discussion will assess your technical knowledge, problem-solving skills, and experience relevant to the role.3. Cultural interview: We will explore your work style, values, and how you might contribute to and thrive within our team culture.
Our goal is to ensure a good mutual fit and set the foundation for a successful collaboration. We appreciate your time and commitment throughout this process and aim to provide a clear and timely response after each stage.
Diversity and inclusion:We believe in social inclusion, respect, and appreciation of all people. We promote a welcoming work environment, where each CloudWalker can be authentic, regardless of gender, ethnicity, race, religion, sexuality, mobility, disability, or education.
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About CloudWalk
Learn more about CloudWalk and their company culture.
At CloudWalk, we are revolutionizing the global financial landscape through groundbreaking technology, fundamentally changing how individuals and small to medium-sized businesses manage their money. Our core mission is to democratize access to world-class financial services, and we achieve this by pioneering AI and blockchain-driven solutions. Through our flagship brands, InfinitePay in Brazil and JIM.com in the U.S., we offer a comprehensive suite of products including digital accounts, innovative Tap to Pay functionality, instant payment processing, and a range of tools designed to foster business growth. Our commitment to innovation is relentless, as we continuously integrate cutting-edge artificial intelligence across our entire product lineup. This ensures that CloudWalk's offerings are consistently at the forefront of efficiency, user-friendliness, and technological advancement, making sophisticated financial management smarter and more accessible to a broad and diverse audience worldwide. We believe in empowering our customers, transforming complex financial operations into seamless and intuitive experiences.
CloudWalk's technological prowess is built upon a modern technology stack and our proprietary blockchain, STRATUS. This high-performance, secure, and scalable open-source blockchain is specifically designed for global payment networks, capable of processing up to 1,800 transactions per second with the potential for infinite growth through sharding and multi-raft consensus models. This robust infrastructure forms the backbone of our AI ecosystem, enabling continuous improvements and fostering innovations that directly benefit our users. Our approach is not just about providing services; it's about building a new, fair payment network that challenges the traditional system, ensuring that merchants, particularly small and medium-sized enterprises, can thrive. By focusing on disruptive economics and deep customer engagement, we aim to unlock purchasing power and transform how merchants sell and profit, ultimately contributing to a healthier and more dynamic economic environment. Our journey is marked by significant milestones, including substantial revenue growth and a rapidly expanding customer base, underscoring our position as a leader in the fintech revolution.
Tech stack
Learn about the tools and technologies that CloudWalk uses to build, market, and sell its products.
Ruby on Rails
Ruby
Google Tag Manager
Blockchain
Cloudflare
Salesforce
Google Analytics
Figma
Avocode
React
Google Ads
1 moreCloudWalk employees can create an account to update this tech stack.
Employee benefits
Learn about the employee benefits and perks provided at CloudWalk.
Meal allowances
Allowance for meals.
Health care
Health care coverage.
Dental care
Dental care coverage.
Paid vacation
30 days of paid vacation.
CloudWalk
Company size
501-1000 employees
Founded in
2013
Chief executive officer
Luis Silva
Markets
Employees live in
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