(Senior) Backend Engineer (f/m/x)

Stellenbeschreibung:

We enable anyone to be an investor. Our mission is to grow investing opportunities for all European customers and businesses, providing seamless access to capital markets. By empowering FinTechs, Banks and Wealth Managers to offer investment products, we help create financial well-being for their customers.

lemon.markets provides a Brokerage-as-a-Service platform for simple digital access to capital markets through a single API. Our API-first infrastructure makes launching an investment product customer‑centric and compliant. We abstract all complexity for our partners through a well documented API, a self‑service customer operations portal and operating in a clear regulatory framework. Enabling partners to launch in weeks, not months.

We have experienced first hand that brokerage infrastructure is broken. Building an investment product used to be highly expensive, challenging and cumbersome. We ease this pain by shielding our partners & their customers from the underlying complexity - and with that, we make investing seamlessly accessible to everyone. Because that’s exactly what we enjoy, going to places nobody else dares and solving hard problems. This not only creates tons of value when done right, but attracts the smartest minds - because outlier companies are built by exceptional people like you.

Your Mission:

As a Backend Engineer at lemon.markets you will play a key role in designing the backend services and architecture of our brokerage API platform that allows other companies to easily embed investing into their product. You will take ownership of features and services end to end in cross‑functional teams, ensuring they run smoothly on production.

You will focus on areas of the Customer Lifecycle, Investing or Banking processes - making sure our Core Platform & Systems around it are reliable & scalable.

Our Tech Stack is Python, FastAPI, AWS and Postgres.

While you can have worked in different modern tech stacks prior, you should be excited to work in Python and learn it if you haven’t worked with it before.

You will have a significant impact on the development of our core Platform & Systems - and thereby architectural decisions, as well as on the business itself. Work alongside a cross‑functional team of experts, and together we will leverage your previous experiences to build the investment infrastructure for the next 100 million retail investors in Europe.

About you:

You have experience in designing and implementing highly scalable architecture and reliable REST APIs and bring the desire to make them world‑class.
You’ve gained good experience with software in a cloud environment (AWS, GCP, Azure) and the architectural patterns for this environment.
You have a good understanding of more than one document‑based or relational database technology such as MySQL/PostgreSQL or MongoDB
You know how to write high‑quality code that is understandable, maintainable and well tested, and can guide other engineers to do the same via code reviews.
You have good problem‑solving skills and the ability to provide in‑depth evaluations and analyses of unique and complex technological issues.
You have a track record of designing, building and operating reliable and scalable backend systems as part of a cross‑functional team.

You will be successful in this role if:

Growing investment opportunities excites you. We operate in a highly regulated environment and therefore having worked prior in a Fintech or financial Service provider would give you a head start, but is not a must.
You see yourself as a product engineer. That means, you are excited by solving customer problems and strive to become an expert in the domain area you are working in.
You enjoy building from scratch. This means high involvement in the product development process itself while advocating for the best engineering practices. It also means that you enjoy taking technical decisions.
You are ready and willing to take ownership of problems and act on them decisively with no supervision. You always thrive for high quality outcomes through focus, determination and attention to detail.
You are a team player. Working together as a team, sharing knowledge & providing mentorship comes naturally to you. Long term - you consider becoming a team lead.
You have no problem with learning new technologies on the go. You try to solve problems with more things than the ones you already know. We will always enable you with that, but your willingness has to come first.
You understand what working in a startup or a similar lean organisation is like. You are able to work with a small team in a lean environment, can move quickly and focus on what's truly important.
You see yourself reflected in the skills above, or you see yourself growing into this path.

We're looking for people with passion, desire to learn and that are team players. You're encouraged to apply, even if your experience doesn't precisely match the job description. Your skills and passion will stand out - and set you apart - especially if your career has taken some extraordinary twists and turns.

How we take care of you:

We offer you a competitive salary and benefits package, based on your experience and the value‑add you bring to lemon.markets.

Make a real impact:

Shape the experience for our customers and us alike. Decide on tools, processes and the architecture design of our Platform & API, while building, learning and growing together.

We value focus time. Encouraging everyone to minimise fixed meetings and leverage asynchronous communication.

Build your perfect setup:

Mac, Mechanical Keyboard, Screen. These are not expenses but investments. Please tell us what is needed to make you productive, and we will take care of it.

We all believe that in‑person collaboration is an integral part of working together, but we offer flexibility to work from home across Europe. That means, lemoneers work 4 days or more per month on‑site, spending quality time together with the team at events, offsites or over team dinners.

Grow with us:

We take your personal development seriously, meaning that we make sure to constantly mentor and challenge you so that you can reach your next level and beyond.

Get the flexibility you need:

Whether you have a family or a passion that you want to follow on the side. We want to offer you a setting that fits your current stage in life.

We sponsor a Deutschlandticket for employees on unlimited contracts, plus 50% off on Beatvest - our partner for financial education and investing.

Work from anywhere in the EU for up to 60 days per year.

About the process:

Hiring can be an exhausting process, especially when you're the one trying to get hired. Therefore, we try to make this a fast and transparent process. Additionally, you will always have one contact person guiding you through the process and helping you to schedule meetings, and setting you up on a path of success. Your process will look like this: