AI-Driven Full-Stack Customer Success Engineer

Oper; Antwerpen; On-site; Confidentiel; Full time

Benefits offered by this job

Competitive annual salary

Employee stock options

25 vacation days + 1 paid mental health day

Learning & Development budget

Health insurance and pension scheme

Flexible working hours

Job summary

Oper is seeking an AI-Native Customer Success Engineer to enhance automated mortgages across Europe. The role prioritizes technical implementations for clients, facilitating smooth product launches and integrations.

Aiming to revolutionize the mortgage industry, you should be AI-native, utilizing modern tools to maximize efficiency. With a focus on customer relations, you’ll bridge technical needs and business logic for successful onboarding.

This position is hybrid, requiring presence in the Antwerp office 2-3 days a week.

Qualifications

• Experience in software development with a preference for fintech.
• Ability to work with flexible and loosely defined requirements.
• Fluency in English; German is a plus.

Responsibilities

• Own the technical implementation of customer installations.
• Work closely with the Customer Success team across multiple clients.
• Liaise with clients and system integrators to translate needs into solutions.

Skills

Software Development

Python (Django or FastAPI)

Angular

REST APIs

AI-tools

Communication Skills

Education

3 to 5 years of experience

Job description

About Oper

Oper, a European Fintech company, is a leader in cloud-based digital mortgage software. We provide personalized journeys for borrowers and lenders. Oper's technology streamlines the mortgage application process, eliminates paperwork, and increases transparency. Currently collaborating with 16 leading financial institutions across 6 European countries, our digital solutions result in a +27% increase in digital customer conversion, +81% faster mortgage decisions, and a 90% first-time-right.

Oper's AI Analyst, Herman, is a mortgage underwriting agent that automates document validation, data extraction, fact-checking, and credit policy application to deliver fully explainable, decision-ready loan recommendations in minutes instead of hours.

A passionate and engaging team of over 30 stellar Fintech operators works vigorously to transform European mortgages by enhancing efficiency and alleviating borrower anxiety. Backed by Bessemer Venture Partners and Motive Ventures, our SaaS platform has raised EUR 14 million, placing Oper at the forefront of revolutionizing mortgages in Europe. Oper currently has offices in Zürich, Switzerland, and Antwerp, Belgium.

Now, we’re looking for an AI-Native Customer Success Engineer to join our mission and help shape the future of automated mortgages in Europe and beyond.

Your Mission

In this role, you will own the technical side of getting our product live and running smoothly for specific customers. The work spans a wide range, from focused changes like a custom acceptance rule or a contract template adjustment, to more complex custom integrations and micro-services. You'll work within the frameworks the product team provides, extending them with new business logic and journeys rather than conceptualising major new features, all with the goal of getting more clients live on Oper and keeping them successful. This is a role for someone who is AI-native, who uses modern AI tooling as a core part of how they think, write, and ship.

Tasks

What you’ll do

• Own the technical implementation of customer installations: configuring acceptance and business rules, adapting contract templates, building custom integrations and micro-services, and extending existing product frameworks with new logic.
• Work closely with the rest of the CS team across multiple clients and projects at once, switching context comfortably between different people, codebases, and problem areas.
• Be customer-facing: joining meetings and workshops with clients and system integrators, translating their needs into technical solutions.
• Liaise with the product team to suggest improvements that let us onboard clients faster.

Work AI-native

We expect you to use modern AI tooling as a real lever, not a curiosity.

• Write code AI-first: agents produce the bulk of your code under your direction, while you own the architecture, integrations, review, and quality. We measure your output in shipped customer value, not hand-typed lines.
• Build agentic workflows that do real work: scaffolding integrations and micro-services from a spec, generating and running tests, drafting configuration and contract logic, and reviewing diffs.
• Use modern AI coding tooling as the default way you build, configure, and debug, not as an occasional helper.
• Identify where AI compounds your work and where it does not, and design your workflow accordingly
• Aim for a delivery cadence a non-AI-native engineer simply cannot match, and help us raise the bar on what an AI-native delivery function looks like at Oper

Requirements

What you’ll bring

• 3 to 5 years of experience in software development.
• Full stack → Python (Django or FastAPI) on the back-end and Angular on the front-end
• Solid experience with REST APIs and integration work, comfortable shipping across the full stack from Angular front-ends to Python services.
• Comfortable working with flexible and loosely defined requirements, bringing your own structure where needed.
• Awareness of security best practices (no deep security engineering required).
• Genuinely AI-native: agents already write most of your code and you build agentic workflows to multiply your output. You can name the tools, the workflows, and the concrete recent projects where AI gave you real leverage, and you treat AI as the default way you build.
• Excellent communication skills
• Creative and analytical mindset
• Ambition to learn, experiment, and grow while staying humble and open-minded
• Fluency in English; additional languages (e.g. German) are a plus
• Experience in a relevant industry (financial services) and thriving in a scale‑up environment are a plus.

Location & Setup

• Belgium-based candidates: hybrid setup with 2 to 3 days per week in our Antwerp office
• Working in CET hours
• Reporting to the Head of Customer Success (Co-Founder)
• Close collaboration with the whole Customer Success, Product, and Engineering teams

Benefits

As a fast-growing fintech, we're building a team where you can truly make an impact.

We offer:

• Competitive annual salary, depending on experience
• Employee stock options
• 25 vacation days per year + 1 paid mental health day
• Dynamic international team with 12 nationalities
• Supportive, inclusive, and collaborative culture
• Learning & Development budget with dedicated time for growth
• Structured onboarding with a dedicated mentor
• Travel budget to collaborate with teams in Antwerp
• Annual company-wide Team G2G in an inspiring location
• Extra-legal benefits depending on your location
• Full support with local administration
• Health insurance and pension scheme
• Flexible working hours
• All equipment needed to do your best work

Inclusive at Our Core

Oper is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees and contractors. All applications are considered without regard to race, religion, gender, gender identity, sexual orientation, disability, age, or any other protected status.