
Reonic · Berlin
Are you excited to work on strategic projects that accelerate the energy transition? If you're excited about green-tech, cross-functional projects and explorin...
Are you excited to work on strategic projects that accelerate the energy transition?
If you're excited about green-tech, cross-functional projects and exploring scalable solutions – then join us and make an impact.
We want YOU!
Please note that for this role, C2 German proficiency is required. This is a full-time, on-site position based in Berlin.
What You’ll Do
conversations.
co-founders and senior team.
features while iterating based on real-world feedback.
prioritizing features, aligning stakeholders, and coordinating sales, marketing, and tech for fast, smooth launches.
What Makes You a Great Fit
Why Join Us?
beautiful Berlin office near Hackescher Markt.
Even if you don’t meet every requirement, we encourage you to apply! Imposter syndrome shouldn't hold you back - we value talent
and passion above all.
About Reonic
At Reonic, we’re on a mission to simplify renewable technology with our AI operating system for renewable installers. Backed by
top-tier investors and trusted by 3000+ business customers, we’re growing fast - and we need YOU to help us accommodate our new
and existing customers.
ABOUT US Every 10 minutes, 18 million conversations happen between businesses and consumers around the world. For decades, the consumer side of those conversations sucked: long queues, robotic menus, repeated explanations, and advice that is often unhelpful. Most people today still cannot simply say what their problem is in natural language when communicating with businesses. AI changes that. For the first time, companies can have natural conversations with customers at massive scale. Every B2C company - from energy providers to telcos to insurers - will use AI agents to talk to their customers. The number of conversations businesses will handle is going to explode in the coming years. At telli, we are solving the challenges that come with that shift. Today, leading B2C companies like Sky are already using telli to deploy thousands of voice agents to provide their customers with a new experience. But building a first voice agent is easy, getting it to drive real outcomes for customers and businesses is the hard part. telli helps companies build, deploy, and improve consumer-facing AI voice agents at scale. This will become one of the most important software categories of the next decade, and we intend to win it. We are a small, AI-pilled team that likes to solve hard problems. Be it engineering, product, or GTM - we build, experiment, and move fast, while heavily leveraging the capabilities of AI models. All of us like to challenge ourselves and take real ownership over what we do, all while still staying humble and keeping a low-ego culture. Check out our principles to see how we work. ABOUT THE ROLE This is the perfect role for someone early in their career (e.g. recent grad) who wants to get deep exposure to how startups operate, work directly with customers, and help scale AI products in the real world. As an AI Operations Intern, you'll work closely with the founders across both onboarding/agent development and customer success, supporting our team in making customers successful with telli. You'll help onboard new customers, develop AI agents, support existing accounts, and build the processes that help us scale. WHAT YOU'LL DO Customer Ownership & Operations * Support pilot accounts and help customers get live with AI agents * Assist with customer communications, answer questions, and resolve basic issues * Help track agent performance and customer health metrics * Support customer workshops and training sessions Agent Development * Help build and refine AI agents alongside the team * Support workflow creation for onboarding and pilot management * Work with automation tools (n8n, Zapier) to improve internal efficiency * Document best practices and playbooks Cross-Functional Collaboration * Help translate customer feedback into insights for product and engineering teams * Support operational tasks that help telli scale * Prepare materials for customer and team meetings * Jump in wherever needed to move projects forward WHAT MAKES YOU A GREAT FIT * You really enjoy working with customers and help them succeed * You're tech-savvy (or have a semi-technical background) * You're an excellent communicator in both English and German - especially writing * You've experimented with AI agents or workflows and understand topics like prompt engineering * You're organized, hands-on, and not afraid of unglamorous work * You're early in your career and hungry to learn fast YOU MAY NOT MAKE A GOOD FIT IF… * You have a pure business background but never worked with workflows or AI agents * You only like 'strategic' work * You want to work 9-5 or remotely
At Upvest, we are on a mission to make investing as easy as spending money. Upvest empowers businesses to offer a wide range of investment products and the best experience in the field of capital market investment and retirement planning. Upvest’s Investment API is easy to integrate so that fintechs and financial institutions can save resources and fully focus on their core business. We are proud to partner with Europe’s leading Fintechs and financial institutions such as DKB, Revolut, N26 and Raisin. Founded in 2017 by Martin Kassing, Upvest now brings together over 270 talented professionals from more than 70 nationalities. Upvest is backed by €280M in total funding from world-class investors, including BlackRock, Tencent, Sapphire Ventures, and Bessemer Venture Partners, Earlybird, Notion Capital, and Motive. Our latest €105M funding round in March 2026 - led by Sapphire and Tencent - serves as a massive catalyst for our growth, allowing us to offer premier investment experience. ABOUT THE ROLE: As Upvest enters the next stage of growth, we are looking for fintech enthusiasts to support us in the Strategy team and work directly with our Head of Strategy & Chief of Staff, Tine Von Villiez, as well as our entire Strategy team including our CEO and Founder, Martin Kassing. As leading Investment API category leader in Europe, we are scaling our business and product across client groups, markets and products. As Strategy Intern, you will be at the core of our strategic initiatives, working within the strategy team and cross-functionally with our other teams to: Support Upvest’s vision and strategy to become the leading investment infrastructure of tomorrow across Europe Our Investment API revolutionises access to investment infrastructure. We have worked relentlessly to build the product we have today and are proud to already call Europe’s largest Fintech our clients. As we enter a critical scaling phase, we need to stay laser-focused on our goal: to become Europe’s category leader. Our company strategy serves as the backbone of this focus. As Strategy Intern, you will support the Strategy team and entire executive team to shape and execute our strategy—from initial conceptualization to prioritisation, execution and communication of key initiatives. Example projects include supporting our international expansion and uncovering new business opportunities. Support our organisational strategy as a key enabler for growth and focus With over 180 talented professionals on our team and continued growth in product, markets, and client reach, it’s essential to maintain a sharp focus, make strategic decisions, and set clear priorities. You will be key to supporting the development and execution of our organisational strategy, including our OKR process, linking our OKRs with core business KPIs, and collaborating across teams to ensure cohesive decision-making and strategic prioritisation. Additionally, you’ll play a central role in supporting our all-hands presentations, preparing senior stakeholder presentations and offsites. Work cross-functionally to gain deep insights into our business As a member of the strategy team, you’ll engage in cross-functional projects to gain a comprehensive understanding of our product, clients, operations, and banking ecosystem. Working closely with our Head of Strategy & Chief of Staff and our executive and senior management teams, you’ll ensure seamless business operations. You will gain wide exposure across our business, contributing to high-impact projects alongside senior leadership. WHAT YOU CAN EXPECT FROM THIS ROLE: * Ownership coupled with inspirational leadership: As Strategy Intern you will be at the core of some of the most impactful projects at Upvest. From supporting the definition of our company strategy and targets to helping in the execution, you will be a key stakeholder and truly own the outcome paired with inspirational leadership, working directly with our Chief of Staff and the entire management. * An exceptional team: Upvengers are one of a kind when it comes to combining impactful work with a relaxed and fun atmosphere. Across the board, we have established strong practices around feedback, team health and social events resulting in constantly high eNPS * Continuous learning: The complex yet fascinating field of investments, building an API product on a state-of-the-art tech stack, and working with the most relevant fintechs and financial institutions provide for an incredibly rewarding learning experience. It is a great opportunity if you aspire to grow professionally and personally. ROLE REQUIREMENTS * You have completed at least 1–2 internships in high-growth companies or strategy consulting. * You excel at analyzing complex problems, breaking them down into actionable insights, and driving measurable outcomes. * You thrive in cross-functional teams, aligning efforts toward shared goals. You're comfortable managing multiple projects simultaneously and adapt quickly to new challenges. * You enjoy developing and articulating strategic initiatives, while also diving into the details to ensure flawless execution. * You're passionate about fintech, eager to learn, and driven to transform the investment world to empower more people to invest. * You're available for a minimum of 4 months and are based in Berlin. HOW WE UPVEST IN YOU: * Best-in-class AI tools: Every Upvenger has €20,000 per year to spend on the best AI tools available — so you're always working with the most powerful models and tooling on the market. * Impact-driven work: We’re building the infrastructure that will power the future of investing in Europe. It’s complex, ambitious, and meaningful. You’ll work with modern technologies and create something entirely new. No legacy systems, no limits. * Wellbeing: Recharge with 30 days of annual leave and maintain a healthy lifestyle with sports benefits. Access confidential professional coaching and enjoy the flexibility to work remotely abroad for up to 183 days a year. Recharge with UpRest, a one-month fully paid sabbatical after every 4 years of working at Upvest. * Development: Growth is in our DNA. Each Upvenger has access to a personal development budget and the freedom to decide how to use it. * Flexible work environment: Work from any of our hubs in Berlin, London or Tallinn hybrid or remotely across Europe, depending on the role. We give you the choice and budget to work where you’re most comfortable and productive, either at home or in the office. You choose. * Compensation and equity: We believe that all Upvengers contribute to our success and deserve a competitive, above-market salary and a participation in our employee equity program. * Team celebrations: Participate in company-wide events, such as UpFest, dinners, offsites and our Holiday party, to connect with colleagues and celebrate our achievements. * Inclusion: We’re committed to a culture where everyone belongs and thrives. Our Employee Resources Groups foster inclusion and connection, like Upfem for our female Upvengers, or UpVergent supporting neurodivergent Upvengers and allies. OUR VALUES: * Make it easy for others. We simplify the complex and act with the best intentions. * Own the outcome. We are proactive, fast and confident to get the job done, valuing progress over perfection. * Rise to the challenge. We aim high and push the boundaries. We stay curious, learn and celebrate our wins together. * Tell the story. We start with the Why to align on purpose. We are transparent and share knowledge to empower and inspire others. Upvest is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.
FOUNDER'S ASSOCIATE INTERN (PRODUCT DEVELOPMENT) INTERN, FULL-TIME · BERLIN, ONSITE THE IMPACT YOU WILL MAKE As Founder’s Associate Intern for our Product Development Team, you will work very closely with our VP of Engineering Anthony and our Founder & CEO Andreas to enable them and the productivity of their department. This means being data-driven (by developing department reporting or ad-hoc analyses) and ensuring efficient operations (by preparing and hosting meetings). You will receive unique insights into the machinery of one of the fastest-growing and most exciting start-ups in Europe. THIS IS WHAT YOU WILL BE DOING * Prepare business-critical presentations for our Founder and VPs addressing the team or external stakeholders (e.g., All-hands, townhalls, investors, prospective clients) * Set-up, maintain, and enhance recurring analyses to give the Executive Team strong visibility into the state of our business * Build and maintain lightweight internal AI tools and automations with Claude to cut down manual reporting and ops work * Use Claude to accelerate analyses, research, and drafting: turning raw data from BigQuery, Linear, and Notion into board-ready narratives, decks, and recurring reports * Collaborate with our VPs on project management, direction setting, staffing modeling, and reporting * Run ad-hoc analyses and research * Establish processes and best practices to help our organization mature (e.g. removing silos, sharing knowledge & tooling between different departments) * Support company events (e.g. offsites, team events, hackathon) YOU'LL FIT GREAT WITH THESE SKILLS AND VALUES * You've worked in fast-paced environments before, e.g., in top-tier management consulting, private equity, investment banking, venture capital, or high-growth startups * You have strong FIGMA/PPT and Excel skills (ThinkCell is a significant plus) * You master strong analytical skills and have experience with analytics tools like Looker Studio * You are highly structured and know how to divide and conquer complex problems, enabling you to take ownership and execute projects quickly * You're comfortable with AI tools (Claude, etc.) you can get an LLM to do reliable, useful work, and you know when to verify its output rather than trust it blindly * You are known among your peers for a high sense of integrity and responsibility * You will join us for a minimum of 3 months, 6 months preferred * You have excellent English writing and conversational skills THINGS WE OFFER * Working on challenging and impactful projects at the forefront of one of the most innovative industries in Europe * Collaborating with some of the leading experts in Conversational Commerce and disrupting a fast-growing industry * Joining forces with a unique community of Tech, Product, Sales, Success, and Marketing experts committed to building the best product in Conversational Commerce * Having high visibility and impact across the business with the option to own and drive new initiatives * Celebrating our major and micro-wins as well as getting to know each other better at regular team-building events * Working in a vibrant office in the heart of Berlin overlooking the Wall memorial What else we offer? * Urban Sports Club membership * Mental Health support through OpenUp * Free company lunch on Thursdays * A friendly, open, multicultural work environment * Dog-friendly office * Discounts on BVG tickets About us It’s better to have a conversation charles is a conversational AI and CRM for consumer brands that attracts, converts, services, and retains customers via AI agents, marketing automations, bulk campaigns, or an inbox for human agents. We help brands to maximize customer engagement and revenue through conversational channels such as WhatsApp. Businesses can reach customers in an interactive way, collect data to expand customer understanding and guide them to targeted offers that convert. charles’ AI Agents deliver hyperpersonalized experiences at scale while ensuring enterprise-grade security and GDPR compliance. Founded by Kapten & Son co-founder, Artjem Weissbeck, and ex-McKinsey ecommerce lead, Andreas Tussing. charles is backed by Salesforce Ventures, Accel and HV Capital and has raised over EUR 30 million to build the global leader in conversational marketing SaaS for global consumer brands. charles and diversity: be yourself and no-one else Different perspectives bring innovation and richer work environments. We’re committed to building an inclusive company where you always feel like you belong, whatever your age, gender identity, ethnicity, religion, sexual orientation, disability, status or neurodiversity. These values sit at the heart of our hiring process, so we can create a welcoming workplace where everyone feels valued and heard.