Climate Engineering Lead Developer

Job Reference:: 2025-3554
Location:: Budapest
Category:: Technology
Solution:: Climate

Your Team Responsibilities

We are developing advanced software systems and data workflows to assess the financial impact and exposure to climate change. Our integrated data, analytics, indexes, and insights empower clients across the investment ecosystem to navigate the climate transition with clarity and confidence.

We are seeking a talented and driven Software Engineering Lead Developer to join our ESG & Climate Application Development team in Budapest. In this role, you will collaborate with global, cross-functional teams to design, build, and evolve our leading-edge ESG, Climate, and Net-Zero solutions.

Your Key Responsibilities

Deliver new features for existing platforms and next-generation ESG & Climate applications.
Monitor, analyze, and optimize application performance and scalability.
Collaborate closely with Product Management, Research, QA, DevOps, and Infrastructure teams throughout the software development lifecycle.
Mentor and lead by example a software engineering team working with Python and REST API frameworks (FastAPI, Flask, Django) on a cloud-based, big-data infrastructure.
Design and implement robust, secure, and scalable data-driven applications using modern cloud technologies.
Champion test-driven development and partner with QA, UI/UX, Product Owners, and Architects to ensure high-quality outcomes.
Ensure on-time delivery of reliable, enterprise-grade software solutions.
Demonstrate strong debugging, troubleshooting, and system-level thinking.
Communicate effectively across teams and stakeholders and lead by example.
Advocate for sustainable, efficient, and open-source-based architecture and tooling.

Your skills and experience that will help you excel

Strong hands-on experience with Python and numerical computing libraries such as NumPy and Pandas.
Proficiency in designing and developing RESTful APIs using FastAPI, Flask, or Django.
Experience working with SQL and NoSQL databases, including schema design and optimization.
Familiarity with data-intensive applications and scalable, cloud-native architectures.
Solid understanding and application of software testing frameworks (e.g., pytest, unittest, BDD) and CI/CD practices.
Proficient with Git and modern version control workflows.
Practical experience with Azure Databricks, Spark, Polars, or similar analytics platforms.
Hands-on experience with cloud platforms (Azure, Google Cloud) and building batch/ETL/integration pipelines.
Experience designing, developing, and maintaining microservices in a cloud environment.
Understanding of DevOps and security best practices.
Exposure to or experience with open-source software ecosystems.
Experience using AI/LLM tools to solve business problems or enhance developer productivity is a plus.
Strong communication, collaboration, and problem-solving abilities.
Bachelor's degree in Computer Science, Engineering, Mathematics, or a related field, or equivalent practical experience.

About MSCI

What we offer you

Transparent compensation schemes and comprehensive employee benefits, tailored to your location, ensuring your financial security, health, and overall wellbeing.

Flexible working arrangements, advanced technology, and collaborative workspaces.

A culture of high performance and innovation where we experiment with new ideas and take responsibility for achieving results.

A global network of talented colleagues, who inspire, support, and share their expertise to innovate and deliver for our clients.

Global Orientation program to kickstart your journey, followed by access to our Learning@MSCI platform, LinkedIn Learning Pro and tailored learning opportunities for ongoing skills development.

Multi-directional career paths that offer professional growth and development through new challenges, internal mobility and expanded roles.

We actively nurture an environment that builds a sense of inclusion belonging and connection, including eight Employee Resource Groups. All Abilities, Asian Support Network, Black Leadership Network, Climate Action Network, Hola! MSCI, Pride & Allies, Women in Tech, and Women’s Leadership Forum.

At MSCI we are passionate about what we do, and we are inspired by our purpose – to power better investment decisions. You’ll be part of an industry-leading network of creative, curious, and entrepreneurial pioneers. This is a space where you can challenge yourself, set new standards and perform beyond expectations for yourself, our clients, and our industry.

MSCI is a leading provider of critical decision support tools and services for the global investment community. With over 50 years of expertise in research, data, and technology, we power better investment decisions by enabling clients to understand and analyze key drivers of risk and return and confidently build more effective portfolios. We create industry-leading research-enhanced solutions that clients use to gain insight into and improve transparency across the investment process.

MSCI Inc. is an equal opportunity employer. It is the policy of the firm to ensure equal employment opportunity without discrimination or harassment on the basis of race, color, religion, creed, age, sex, gender, gender identity, sexual orientation, national origin, citizenship, disability, marital and civil partnership/union status, pregnancy (including unlawful discrimination on the basis of a legally protected parental leave), veteran status, or any other characteristic protected by law. MSCI is also committed to working with and providing reasonable accommodations to individuals with disabilities. If you are an individual with a disability and would like to request a reasonable accommodation for any part of the application process, please email Disability.Assistance@msci.com and indicate the specifics of the assistance needed. Please note, this e-mail is intended only for individuals who are requesting a reasonable workplace accommodation; it is not intended for other inquiries.

To all recruitment agencies

MSCI does not accept unsolicited CVs/Resumes. Please do not forward CVs/Resumes to any MSCI employee, location, or website. MSCI is not responsible for any fees related to unsolicited CVs/Resumes.

Note on recruitment scams

We are aware of recruitment scams where fraudsters impersonating MSCI personnel may try and elicit personal information from job seekers. Read our full note on careers.msci.com

Andrew Schoewe – Technology — Andrew Schoewe Technology

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Nelson Villarreal – Technology — Nelson Villarreal Technology

Benefits

MSCI is committed to providing a competitive benefit package to you and, where applicable, your family. You are entitled to an extensive range of core benefits along with a range of cafeteria benefits.

Core benefits:

Life, Accident and Healthcare Insurance Package
Voluntary Pension Fund contribution
Short-term Disability/Sickness benefit
Yearly medical screenings in private healthcare
Paternity leave
Glasses contribution

Cafeteria benefits:

Széchenyi Recreation Card/SZÉP Card
Gift Card
Commuting Allowance
Voluntary healthcare fund contribution
Voluntary pension fund contribution

Development opportunities

Guided by your manager, our learning and development opportunities empower you to perform at your best, make an impact and shape your career.

Career paths are multidirectional and we believe new and challenging experiences drive personal growth and innovation. With access to LinkedIn Learning Pro and our bespoke Learning@MSCI platform, you can easily customize and tailor your learning journey to accelerate your career.

Budapest

Kassák Lajos utca 19-25
1134 Budapest
Hungary

Our Budapest office, located in the XIIIth district of the city, occupies the top three floors of the first LEED-Platinum-certified building in Hungary. As MSCI’s second-largest office, a wide variety of teams and functions are represented here, and each Wednesday we host in-person and hybrid events to nurture inter-departmental relationships. You’ll also find a wide variety of collaboration spaces, private rooms for 1:1s, relax rooms to help you recharge and showers for colleagues who like to exercise before work. Learn more about MSCI's Budapest office.

Recruitment process

Apply online

First, click Apply and upload a CV that shows us the skills and passion you could bring to this role, as well as your contact details so we can reach out to you.
Talk to our recruiter

If you look like a good match, our recruiters will arrange a chat where we’ll ask about your motivations, experience, and background, and where you can ask us anything you want to know about working at MSCI.
Interview with our team

If you like what you hear, and we think you have what we need, then it’s time to interview with your future team, either virtually or in the office. These interviews will give you a clear insight into the team and the day-to-day responsibilities of the role. Read our interview top tips.
Make your decision

If you’re successful, we’ll make you an offer and give you any further information you need to help you make your decision. If the answer is yes, it’s time for some background checks, and then we’ll welcome you on board. Learn more about our onboarding experience.