(Junior) Customer Success Manager (f/m/x)

Permanent employee, Full-time · Hamburg

55,000 - 70,000 € per year

Intro

Hamburg Hybrid | €50.000 – 65.000 (depending on experience) | 30 days vacation | German (clients) & English (internal)

Are you passionate about building strong customer relationships, driving operational excellence, and making a real impact in the energy transition? Join us at suena energy as our first (Junior) Customer Success Manager (f/m/x) and become the trusted partner for our clients, ensuring they get the best from our trading solutions and supporting them on their journey to a smarter, greener energy future.

suena energy is a green tech startup specializing in algorithmic energy trading for energy storage systems and renewable energies.
Our vision: a world where clean energy is used reliably, economically, and intelligently. With our AI-based optimization and trading software, we maximize the revenues of operators of large-scale energy storage and renewable assets on short-term electricity and balancing markets – while simultaneously minimizing their risks.

We’re a team of 38 people, combining a warm, supportive team culture with true startup drive. Following our successful Series A, we’re expanding our team – and looking for a customer-focused relationship builder who will pioneer the Customer Success function at suena.

Quick Check: Is This for You?

You’re based in or near Hamburg (hybrid setup)
You love building long-term client relationships and being their trusted contact
You have a solid understanding of technical topics – ideally renewables or power trading – and can turn them into customer value
You work proactively and keep a cool head when things get complex
You’re fluent in German and comfortable in English – some clients may speak English, internal language is English

Your mission

Serve as the main point of contact for a portfolio of up to 20–25 clients, building lasting relationships and acting as their advocate within suena
Strengthen client loyalty and engagement by developing success plans, leading regular business reviews and ensuring a positive client experience – your impact is measured by client satisfaction and retention
Handle, prioritize, and track support tickets and client portfolios, keep clients informed, and coordinate solutions with internal experts when needed
Lead client workshops and invite customers to events to further foster strong partnerships and share best practices
Support knowledge transfer and help build a knowledge base for recurring customer topics
Collaborate closely with Sales, who take over for contract renewals and commercial topics, allowing you to focus on the ongoing success and satisfaction of our clients

Your profile

At least 1-2 years of experience in customer success or account management, ideally with complex or technical products
Background in the energy sector – you understand industry challenges and can communicate confidently with both technical and commercial stakeholders
Strong relationship builder with excellent communication skills in German (C1) and English (B2); you enjoy working closely with clients from various backgrounds
Proactive, structured, and solution-oriented working style; you anticipate client needs and are quick to coordinate resources internally
Confident using digital customer success tools (Hubspot, Notion, Teams)
Ability to manage multiple accounts and priorities with a cool head, even when things get busy
Growth mindset and readiness to help shape processes, culture, and the future of customer success at suena
Engineering or technical background is a plus, but not required

Why us?

Shape the Future: Help drive the energy transition with us! Join a booming market, real startup spirit, and make your mark in sustainability.
Connecting & Co-Creating: Strategy off-sites (like Denmark 2024) and onsite weeks for real collaboration and shared ideas.
Work Your Way: Home office and flexible hours – you know what works best for you and your team.
Team Spirit: Yoga, shared lunches, after-work fun – we support each other and keep the vibe strong, even when it’s busy. Barista, DJ, guitarist included – we can’t wait to discover your hidden talent!
Fair & Transparent: Clear structures, democratic decisions, and a feedback culture where your voice counts.
Body & Mind: Urban Sports Club membership, wellbeing check-ins, and mental health support – your energy matters.
New Office Vibes: 10th-floor office with rooftop terrace, canteen, great views, ergonomic desks, hardware of your choice, and pet-friendly!
Sustainable Extras: Deutschlandticket, FutureBens, and more – supporting your mobility and future.

What else?

We look forward to receiving your application, earliest start is as soon as possible. If you have any questions, feel free to reach out - your contact is Kathi (Interim Talent Partner).

You’ll hear back from us within 5 working days of your application. We value your time and want to make the process as transparent as possible.

Once we receive your application, we’ll send you a confirmation email outlining the next steps and what you can expect from our interview process.

We can’t wait to meet you!

A quick note:
The Christmas holidays are just around the corner, and our team will be taking a little break starting December 19th. We’ll be back on January 7th and will get in touch with you then. If you celebrate Christmas, we wish you a wonderful time with your loved ones. And even if you don’t, we hope you enjoy the peaceful days at the end of the year. See you in 2026 - take care!

suena energy is an equal opportunity employer. We celebrate diversity and reject any form of discrimination. It is important to us to create an inclusive environment for all our team members.We want to particularly emphasize that our call for applicants is addressed to all genders.The integration of people with disabilities is an opportunity and not a problem for us, and we, therefore, welcome their application.

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About us

https://www.youtube.com/watch?v=-Dsctj9qh2s

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We are looking forward to hearing from you!

Thank you for your interest in suena energy. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to info@suena.energy