Join our team
We're building a culture at Lebesgue where amazing people can do their best work.
About Lebesgue
Our mission is to help eCommerce businesses of all sizes improve their digital marketing efforts by providing the most powerful software solution backed by advanced statistical and mathematical modeling.
Personal Growth
We continually embrace change and push boundaries to make innovation happen. This means that we can offer you endless opportunities to do the same.
Customers First
Enter competitors' names and URLs for analysis. Our AI will gather insights, monitor their email strategies, and track newly published and recently turned off ads on Facebook, Instagram, and Google.
Be an owner
We're tackling challenges in time series analysis, natural language processing, chatbots and neural networks— all while implementing the solutions into our own product
Act with integrity
We always act with integrity. We do what we say we are going to do and we admit when we make mistakes. Acknowledge your errors, learn and move on.
Skills
Making great decisions quickly, thriving on change, being a constant learner, building for the long term.
Education
Professional development, personal development, learning from others, problem solving, entrepreneurship, experimentation.
Open positions
At Lebesgue, we're a fast-growing, VC-backed startup based in Croatia, building a powerful web application that helps businesses make smarter marketing decisions through advanced analytics and machine learning.
We're looking for a Full Stack Developer to join our team and play a key role in developing new features and improving our core product.
Tech Stack
You’ll be working with the technologies we love and rely on:
- Architecture: AWS, ECS, RDS, Docker
- Data Storage: PostgreSQL, Amazon Redshift
- Backend: Python, FastAPI, Celery, SQLAlchemy
- Frontend: TypeScript, React, Next.js
- Tools: Git, GitHub
What You’ll Work On
- Developing and maintaining our core product – Lebesgue
- Collaborating closely with our Data Science team to create innovative features powered by analytics and models
- Participating in product design and having a real impact on what we build and how we build it
- Working on both frontend and backend, contributing to a robust, scalable, and user-friendly application
What We’re Looking For
- 3+ years of experience as a full stack developer (or strong backend/frontend and interest in the other)
- Proficiency in at least some of the technologies listed above – we don’t expect you to be an expert in everything, but a willingness to learn is key
- A proactive, product-oriented mindset
- Ability to work independently and take initiative
- Good communication skills and a collaborative attitude
What You Can Expect If You Join Us
- Small, motivated, and friendly team
- Flexible working hours and the option to work from home a few days a week
- Transparency into product development and business decisions — you’ll always know what we’re building and why
- Opportunity to learn, grow, and make a real impact on a product used by companies worldwide
- Option for the company to cover the cost of professional certifications and learning resources
- Partially subsidized lunch
- Multisport card subsidy
How to Apply
If you’re interested in this opportunity, please send your CV to [email protected]. We look forward to hearing from you!
At Lebesgue, we're a fast-growing VC-backed startup building a powerful web application that helps businesses make smarter marketing decisions through advanced analytics and machine learning.
We’re now looking for a Backend Developer to strengthen our engineering team and help scale our analytics engine and core product.
Tech Stack
- Architecture: AWS, ECS, RDS, Docker
- Data Storage: PostgreSQL, Amazon Redshift
- Backend: Python, FastAPI, Celery, SQLAlchemy
- Frontend: TypeScript, React, Next.js
- Tools: Git, GitHub
What You'll Work On
- Developing and maintaining our core product – Lebesgue
- Collaborating closely with our Data Science team to create innovative features powered by analytics and models
- Participating in product design and having a real impact on what we build and how we build it
- Working on our backend, contributing to a robust, scalable, and user-friendly application
- Optimizing database performance and ensuring system reliability
What we’re looking for
- 3+ years of experience in backend or full stack development
- Proficiency with Python and backend frameworks (FastAPI preferred)
- Solid experience with relational databases and SQL
- Familiarity with containerization (Docker) and AWS-based deployments
- A proactive, product-oriented mindset
- Ability to work independently and take initiative
- Good communication skills and a collaborative attitude
What we offer:
- Small, motivated, and friendly team
- Flexible working hours and the option to work from home a few days a week
- Transparency into product development and business decisions — you’ll always know what we’re building and why
- Opportunity to learn, grow, and make a real impact on a product used by companies worldwide
- Option to join our stock option plan, depending on role and contribution
- Option for the company to cover the cost of professional certifications and learning resources
- Partially subsidized lunch
- Multisport card subsidy
At Lebesgue, we're a fast-growing VC-backed startup building a powerful web application that helps businesses make smarter marketing decisions through advanced analytics and machine learning..
We're looking for a Frontend Developer to join our team and help elevate our user experience and UI quality to the next level.
Tech stack:
- Frontend: TypeScript, React, Next.js
- API Integration: REST, FastAPI backends
- Tooling: Git, GitHub
What you’ll do:
- Building and refining user interfaces for our analytics-driven SaaS product
- Working closely with backend and data teams to integrate APIs and data-driven features
- Participating in design and UX discussions — we value your product instincts
- Developing reusable components and contributing to our design system
- Ensuring responsive, fast, and accessible frontend performance
What we’re looking for
- 3+ years of experience as a frontend or full stack developer
- Strong proficiency in JavaScript/TypeScript, React, and modern frontend frameworks
- A passion for good design and clean, maintainable code
- Experience working with APIs and integrating backend services
- A product-oriented mindset — you care about what the user sees and how it works
- Experience with performance optimization and modern build tools
What we offer:
- Small, motivated, and friendly team
- Flexible working hours and the option to work from home a few days a week
- Transparency into product development and business decisions — you’ll always know what we’re building and why
- Opportunity to learn, grow, and make a real impact on a product used by companies worldwide
- Option to join our stock option plan, depending on role and contribution
- Option for the company to cover the cost of professional certifications and learning resources
- Partially subsidized lunch
- Multisport card subsidy
At Lebesgue, we are redefining online marketing through the power of statistics and mathematical modeling. Our software helps businesses optimize their marketing decisions, improve campaigns, and boost customer retention. As a rapidly growing startup, we’re looking for a Business Development & Sales Manager who can help us accelerate our growth by driving new business and closing key sales.
If you’re a motivated self-starter with a passion for sales and business development, this is an exciting opportunity to make a real impact at a fast-paced company.
What you’ll do:
- Identify and Develop Opportunities: Research and identify new business opportunities, and develop strategies to convert leads into customers.
- Sales Strategy & Execution: Drive the entire sales process from lead generation to deal closure, tailoring solutions to clients' needs and objectives.
- Collaborate Across Teams: Work closely with marketing and product teams to align strategies and ensure smooth sales operations.
- Customer Success Focus: Provide consultative sales by understanding customer pain points, recommending solutions, and ensuring long-term satisfaction and retention.
- Market Expansion: Identify new market segments and verticals to explore, expanding Lebesgue’s reach and establishing new partnerships.
- Reporting & Insights: Track sales activities, monitor performance, and provide regular updates to leadership, offering insights to improve sales strategies.
What we’re looking for
- Proven Sales Experience: At least 2 years of experience in sales, business development, or account management, preferably in the SaaS or marketing industry.
- Strong Communication Skills: Excellent written and spoken English, with the ability to engage and persuade clients at various levels.
- Self-Motivated & Results-Driven: Ability to work independently, meet targets, and thrive in a fast-paced startup environment.
- Tech-Savvy: Familiarity with marketing software or online advertising platforms (Facebook Ads, Google Ads, etc.) is a plus.
- Bonus: Experience working with international clients, particularly in the US market.
What we offer:
- Competitive Salary: Based on experience, with performance-based incentives.
- High Impact: Be part of a startup where your contributions will directly influence company growth and success.
- Career Growth: Fast-paced learning environment with significant opportunities to expand your skills and career.
- Flexible Work Environment: Remote work options, flexible hours, etc
- Collaborative Culture: Work with a passionate, innovative, and talented team dedicated to pushing the boundaries of online marketing.
- Opportunity to Learn: Gain exposure to marketing analytics, data-driven decision-making, and cutting-edge software that’s reshaping the industry.
At Lebesgue, we help e-commerce brands grow smarter through data, strategy, and execution. We combine our in-house AI analytics platform with a team of performance marketing experts who work directly with e-commerce brands across the US and Europe.
Our team is a mix between an agency and a growth team — we set up, optimize, and scale campaigns while continuously learning from data and client results. Through your work, you’ll also contribute to improving our own product and shaping the future of data-driven marketing.
We’re currently expanding our team and hiring multiple Performance Marketing Managers to help us support our growing number of clients and continue raising the bar in performance marketing.
Key Responsibilities
- Set up, manage, and optimize Google Ads, Meta Ads, and email marketing campaigns for e-commerce brands
- Work directly with clients through weekly or bi-weekly calls to share insights and growth recommendations
- Analyze performance data using Lebesgue’s analytics platform and identify opportunities for scaling results
- Collaborate closely with the team to share learnings and improve internal processes
- Contribute feedback and ideas to help evolve our marketing automation product
We’re looking for someone who
- Has hands-on experience managing performance marketing campaigns across Google Ads, Meta Ads, and other paid platforms
- Communicates clearly and confidently — with excellent written and spoken English
- Can deliver engaging presentations to clients and internal teams, translating data into actionable insights
- Brings a forward-thinking mindset, proactively identifying ways to improve processes, workflows, and client experiences
- Is analytical, detail-oriented, and driven by measurable results
- Enjoys working in a collaborative environment where everyone learns, shares, and grows together
- (Nice to have) Experience working in an agency environment or with e-commerce brands, understanding funnels, key metrics, and growth strategies
What We Offer
- Competitive Salary: Reflecting your skills, experience, and the value you bring to our growing team.
- High-Impact Role in a Growing Startup: Join a dynamic environment where your contributions directly influence our success and help shape the future of our product.
- Career Growth and Learning: Gain hands-on experience across multiple domains and accelerate your professional development
- Flexible Work Environment: Flexible working hours and the option to work from home a few days a week
- Global Reach: Work with a passionate team serving customers primarily in the US, tackling challenges and opportunities on an international scale.
- Partially subsidized lunch, Multisport card subsidy
Lebesgue’s mission is to redefine online marketing using statistics and mathematical modelling. Our software helps businesses make better marketing decisions, optimize campaigns and improve customer retention strategies based on deep and accurate data analysis. We seek highly motivated individuals who like to creatively use their knowledge and are focused on performance.
What you’ll do:
- developing and improving mathematical / machine learning models for solving specific e-commerce problems
- implementation of models (in R and python)
- education in online advertising and possibly working directly with e-commerce customers in order to better understand their needs
What we’re looking for:
Required
- Bachelor/Master of Mathematics, Statistics, Computer Science or similar technical/quantitive field
- Good knowledge of mathematics, statistical modelling and basic understanding of machine learning principals and algorithams
- Experience in programming, preferably R and python, or similar languages
- Basic knowledge of databases and SQL
- Good knowledge of written/spoken english
Nice-to-have
- basic knowledge and experience using Git
- 1-2 year experience at an analytics/data science position
- experience with online marketing platforms
What we offer:
- a comfortable and relaxed working atmosphere in a small, enthusiastic, young team
- salary above industry average
- flexible working hours
- remote work / work from home
- a chance for further professional development through research, practical applications and knowledge sharing with co-workers
If you are interested in our startup story and think you can bring additional value to our company but none of the open positions seems to fit your profile, feel free to introduce yourself through a cover letter and CV. We are always considering skilled and motivated individuals to join our team.