(Junior) Conversational AI Developer (m/w/d)

OH-SO

WHAT TO EXPECT We are a startup digital agency, and no two projects, clients, or even days look the same. In ecommerce we build on Shopify and Liquid and Next.js, with custom AWS microservices and apps that take Shopify well past the defaults.  On the marketing side we build highly customised sites in Next.js and React, with careful design and animation and a real focus on how the page performs and feels.  In automotive we build full platforms, from stock-car locators to configurators and more. Across all of it, we bring AI into the work through our own products. Here nothing will be fixed. You will work across changing projects and settings, on long builds that run for months and shorter spikes to figure out how a business can actually use AI, and you will help us rethink how agency work is done. Sound like your kind of place? Here is what we need from you. YOUR COMPETENCIES Mindset Is your goal to deliver great software, whether the problem is easy or hard? Do you push deeper than most to find the right solution, not just the first one that works? Then you are the person we need.  Responsibility You own what you build, all the way through, not just until it ships and becomes someone else's problem. The parts that go smoothly and the parts that get messy are both yours to see through. You bring your ideas and your curiosity, you use AI to build better and faster, and you stand behind what you put your name on. Drive You will not know everything yet, and that is fine. What we cannot teach is drive. We bring the tools and the guidance. You bring the push to grow fast, understand what you build, and keep reaching past what you know. What you bring to the table: * You work across crafts, not in a corner. You are close with developers, designers, and strategists, and you would rather build in the open than behind a wall. * You make the team better. You speak up when something can be sharper, and you share what you learn instead of sitting on it. * You care whether the client wins. You focus on the quality of the product and the experience, not just the ticket in front of you. WHAT YOU CAN LOOK FORWARD TO What you will actually do: We build complex, end-to-end products for both big-names and niche clients. You will own the frontend side of that work, plus the bits right next to it. Day to day, that means: * Turning designs into real interfaces in React and Next.js. * Building small pieces of UI and the logic behind them on your own, and taking on medium ones with a more senior engineer alongside you. * Working in an responsive team with clean tickets, clear updates, and knowing when to push on alone and when to ask for help. * You’re enjoying being part of a team, not a remote desk which prefers to work in isolation most of the time. The tech stack you will work with: * Languages and frameworks: React, Next.js, TypeScript, HTML, CSS * APIs: REST and GraphQL * Delivery: Existing CI/CD practices * AI tooling: Claude, Cursor, Pi, Antigravity, plus your and our own Skills and MCP setup Who you will work with We are a bunch of colleagues originally from similar backgrounds who got tired of how things were usually done and set out to find better ways. That is the whole reason this company exists, and it is still what we are doing. We are not a place of rockstars and egos. People here ask questions out loud, show rough work without flinching, and would rather help each other get something right than look clever alone. We push each other, in the good way, and we do not take ourselves too seriously while we are at it. You would be joining that. You’ll work closely with the crafts, designers and strategists, and just as easily with the people steering the projects and the business. There is no wall between you and any of it. Take on the parts you are ready for, and when you want more, a pitch, a client conversation, a bigger call, speak up at the right moment and the door is open. Smaller team. More ownership. Bigger work.

Plaid

We believe that the way people interact with their finances will drastically improve in the next few years. We’re dedicated to empowering this transformation by building the tools and experiences that thousands of developers use to create their own products. Plaid powers the tools millions of people rely on to live a healthier financial life. We work with thousands of companies like Venmo, SoFi, several of the Fortune 500, and many of the largest banks to make it easy for people to connect their financial accounts to the apps and services they want to use. Plaid’s network covers 12,000 financial institutions across the US, Canada, UK and Europe. Founded in 2013, the company is headquartered in San Francisco with offices in New York, Washington D.C., London and Amsterdam. AI and intelligent systems are driving the fifth paradigm shift, following previous technological revolutions like mainframes, personal computers, the internet, and mobile devices. We believe, in the foreseeable future, AI will revolutionize the FinTech industry - from how consumers understand and manage their finances, to how developers build applications and how all companies operate. The fintech industry landscape will undergo a fundamental reshape. Plaid in the FinTech AI Ecosystem Plaid is uniquely positioned to become the financial data and insights backbone for AI applications and platforms in this evolving ecosystem. We believe consumers should be able to understand and manage their financial life through conversational AI interfaces using natural language. We believe consumers should have peace of mind with a trustworthy consent and authorization manager when agents shop for them. We believe identity verification and financial fraud prevention in AI-powered products should feel seamless and embedded for the end users. The list goes on. The most important AI companies, major fintechs, and customer agent platforms are actively trying to integrate Plaid into AI-powered products and solutions they build. Plaid’s AI-powered Experiences for Customers The explosive growth in model intelligence and increasing relevance for enterprise tasks offer a unique opportunity for Plaid to rethink from the ground up how we operate and interact with our customers for the most optimal experience. Our early experiments in building AI agents for customer experience are paying off with huge business value. For example, our homegrown AI-powered customer support agents resolve a significant proportion of customer questions and issues within seconds, which would otherwise have required humans hours to work on. This is just the beginning and there is so much more we could do. The AI Applications Team You will have the opportunity to lead this newly formed team that is dedicated to rapidly scaling our successful bets so far, and grow with the team in our quest to accelerate Plaid’s transformation into an AI-first company. Responsibilities * You will lead a team of 4 engineers, ranging from junior to staff, developing them through clear goal setting, coaching, and feedback * You will define and drive the long-term strategy and manage execution on the team, in close partnership with technical and product leaders across Plaid * Have a front row seat to all the latest industry developments. Over time, with the skills and experience you develop and hone on this team, you can become an influential voice in defining where AI <> Fintech will be heading longer term. You will work with your team to: * Lead projects that enable and scale our business with our largest AI customers and partners, starting with personal finance use cases and expanding into many others; examples include: * Develop and evolve the preferred integration pattern for Plaid with AI providers - from API adaptations to building the official Plaid MCP Servers, and beyond * Redefine how Plaid’s consumer link experience embed into conversational interfaces in the most seamless way * Architect the trust layer for the future of agentic commerce that will become the industry standard * Scale and extend our existing successful bets on AI-powered customer experience; examples include: * Make the next step-function improvement in our homegrown customer support agent - land our multi-turn and multi-agent system that powers a truly delightful experience for our customers; define how to scalably run offline evaluation for complex multi-turn open-ended tasks; research and prototype how Human-In-The-Loop Reinforcement Learning (RLHF) can power an insights flywheel; pioneer the architecture for customer-specific long-term memory, etc. * Extend our agentic system to support other critical parts of the customer journey, starting with areas with the highest ROI - top-of-funnel product recommendation, customer onboarding and risk diligence, customer activation and assistance for faster productionization, as well as upselling and cross-selling of Plaid products. Qualifications Must-haves: * 8+ years of industry experience, that includes time as a Staff-level engineer before transitioning into management. * 1+ years of engineering management experience * Hands-on experience working with LLMs to build products and shipping them to product with iterating with real user feedback - including but not limited to: * Prompt engineering * Fine-tuning * Retrieval augmented generation (RAG) * Semantic search - vector database and embedding models * Agent orchestration framework * Evaluation and monitoring framework of open-ended tasks * Streaming and SSE * Common UX and design patterns for GenAI-powered products * Ability to deeply understand customer and user needs through user research and rapid experimentation - be your own technical PM * Track record of building and growing high performing engineering teams (either as an engineer or a manager). * Ability to balance divergent thinking (exploring possibilities) with convergent thinking (evaluating feasibility), which is critical for driving 0 ->1 projects * Extremely curious and passionate about working in GenAI applications space Nice to have: * Experience training and/or serving ML models in production, or fine-tuning LLMs for domain-specific use cases * Comfortable operating in privacy/PII-sensitive environments and applying compliance mitigations Our mission at Plaid is to unlock financial freedom for everyone. To support that mission, we seek to build a diverse team of driven individuals who care deeply about making the financial ecosystem more equitable. We recognize that strong qualifications can come from both prior work experiences and lived experiences. We encourage you to apply to a role even if your experience doesn't fully match the job description. We are always looking for team members that will bring something unique to Plaid! Plaid is proud to be an equal opportunity employer and values diversity at our company. We do not discriminate based on race, color, national origin, ethnicity, religion or religious belief, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, military or veteran status, disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state, and local laws. Plaid is committed to providing reasonable accommodations for candidates with disabilities in our recruiting process. If you need any assistance with your application or interviews due to a disability, please let us know at accommodations@plaid.com. Please review our Candidate Privacy Notice here. Additional compensation in the form(s) of equity and/or commission are dependent on the position offered. Plaid provides a comprehensive benefit plan, including medical, dental, vision, and 401(k). Pay is based on factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience and skillset, and location. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans.

Marshmallow

We’re on a mission to make migration easy. We started building Marshmallow in 2017. Since then, we’ve grown from 3 to 700+ people, gained unicorn status, raised ~£140M over three funding rounds, turned profitable, insured millions of drivers and lent millions in car loans. But we’re only just getting started. Our goal is to become one of the largest financial services providers in the world. Over the next 10 years we’ll grow exponentially, not only by scaling our existing products, but also by building new ones. To achieve our goals we need incredibly ambitious, commercially driven people who never settle for ‘good enough’. Marshmallowers are hungry for autonomy and ownership, and would rather improve than coast. Everyone raises standards and has an impact, with a focus on collective success over self-interest. We’ve created an environment where curious, tenacious people win and grow together. If that sounds motivating, this could be the place for you. ENGINEERING AT MARSHMALLOW Marshmallow are looking for engineers to tackle complex challenges. So we can make migration easy for hundreds of millions of relocators around the world. Across frontend, backend and full stack, working alongside designers, data scientists and product managers; you’ll be at the heart of every solution we offer. Builders of dynamic new products. Pioneers of new tools and technologies. Open collaborators. Clear communicators. Engineers take ownership of projects from end-to-end to turn goals and vision into reality. With a clear view of where the business is headed and resources readily available to make sure we get there. You’ll have real-world impact creating trailblazing products, true visibility across the business, and the support to share your ideas, ask for what you need and progress. Learn fast and move forward with an engineering career at Marshmallow. If you're curious about our Engineering culture and ways of working, check out the Engineering Handbook. Budapest (hybrid, 2 days in office) Please note we are not in a position to offer sponsorship and/or a visa for this position. ABOUT OUR CLAIMS TEAM YOU’LL BE JOINING Claims Tech is a distributed team across London and Budapest, with a purpose to revolutionise the claims journey. Our mission is to streamline the claims process, reducing costs, enhancing the customer experience, and empowering our operational team to reach their full potential. Three engineering teams specialize in the First party, Third party and Fraud verticals. Currently, we are in the process of developing our cutting-edge internal Claims Management System (CMS). This application is designed to seamlessly guide insurance claims from inception to resolution. It handles every facet of the claims process (internal, external, customer-facing), integrating with partners as well as the financial reporting. Our commitment to innovation and excellence is at the core of everything we do, and the Claims Management System is a testament to our dedication to achieving industry-leading results in claims management. What you'll be doing * Working in a product team enabling efficient automation for tens of thousands of policies, ensuring that we provide customers with affordable, instant, and inclusive insurance * Manages and executes ambiguous technical solutions with appropriate sense of urgency to deliver impact within the team. * Creates and promotes efficiency and speed within the team by improving existing solutions and developing new ones * Partners with stakeholders to understand requirements, build solutions, deliver functionality, write automation tests and build continuous delivery pipelines all the way through to deployment, monitoring and supporting these systems in production What we’re looking for from you * 6+ years of software engineering experience * Expertise in Java and Spring and the eagerness to learn more * Experience with developing and scaling complex microservices systems * Experience with AWS is a must * Previous experience with identifying, analysing, and resolving system availability, reliability, and performance issues * Experience mentoring and guiding more junior members of the team * Full-stack experience with React is an advantage Our Tech Stack * Backend: Latest Java μService, Spring Boot with Spring Cloud, Dynamodb, Terraform, Docker, AWS Fargate, Datadog, Opslevel, and TeamCity. * Frontend: TypeScript, CSS-in-JS (Styled Components), React, Redux, Redux Hooks, and other modern state management libraries. Kotlin on Android and Swift on iOS. * Data: SQL, Python, Snowflake (warehousing), dbt (modelling), Airflow (orchestration) & Looker (BI/visualisation). * AI: Sierra.ai for conversational AI, Sagemaker and Tecton for machine learning, Python and LangChain for agentic AI solutions, and Cursor, Claude Code and Junie for developer productivity. PERKS OF THE JOB * Bonus scheme designed to reward high performance * Private healthcare with Medicare, mental health support with Oliva * Personal learning budget and dedicated L&D time * Monthly SZÉP card budget to spend as you choose * 4 weeks Work From Anywhere per year OUR PROCESS We break it up into 3 stages: * Initial call with Tech Talent Acquisition team (30-40 mins) * A past experience & culture interview with one of our engineering managers to check that your ways of working aligns with our processes, mission and values (1 hour) * Tech interview with two engineers which is centred around pair programming, systems design and technical questions (1 hour 30 minutes) We’ll let you know if you’re invited to an interview or not. But, as a small team with a lot of applications to consider, we can’t give individual feedback on each application #LI-OK1 Diversity of thought We know the best ideas come from having different perspectives in the room - and we're committed to hiring fairly, regardless of background, identity or experience. If you see yourself in this role, we'd encourage you to apply.