Dirk Sahlmer

Acquiring SaaS companies @ saas.group | saas.wtf Newsletter

Engineer turned M&A professional. After 20+ transactions on the buy-side, I'm now helping tech founders run a structured exit process.

Posting regularly here on LI and in my saas.wtf newsletter on SaaS and  M&A topics.

Head of Origination

Kostantin Stambolov 🇺🇦💪

Juicer

Head of Product

Kostantin

I specialize in helping tech companies achieve their goals and drive success. By focusing on three key pillars — Product, People, and Processes — I can help your organization:

• Scale efficiently 
• Achieve strategic growth 
• Optimize profitability and revenue

With a proven track record of building, launching, driving, and scaling successful tech products, I leverage effective strategies and frameworks to enable sustainable growth. 

Let's work together to take your business to the next level.

Founder

saas.group

• Driving product vision and growth strategy, aligning product lifecycle with business objectives and customer demand
• Utilizing data-driven insights to optimize product performance, user engagement, and revenue growth in a PLG environment
• Identifying enterprise expansion opportunities through PLG, market research, and competitive analysis to differentiate and innovate
• Defining processes, structure, and leading product redesign to deliver a world-class product experience

Product

Experian

• Led migration of $5M portfolio of enterprise clients from on-premise to in-house cloud BI solution for banks, telecoms, and government organizations
• Spearheaded 50-person team with 5 product owners to develop, roll out, and support modern B2B SaaS BI capability, empowering clients with actionable insights
• Managed product lifecycle and vision alignment with business objectives and customer demand from 7 global regions
• Conducted market research and competitive analysis to identify differentiation and innovation opportunities in cloud computing and AI

Global Product Manager (Decision Analytics)

• Led execution of ML models in decision process flow, enhancing data-driven capabilities and decision-making worldwide. 
• Collaborated with cross-functional teams from marketing, customer success, sales, and development to integrate advanced analytics solutions for the Experian portfolio offering.

Global Product Manager (Advanced Analytics) 

Stealth Startup

• Built and led a team of 6 to develop the core product, delivering a competitive MVP for a $500M TAM.
• Defined and executed product strategy, prioritizing features based on market demand and business goals.
• Led growth marketing to develop plans for identifying and sizing future growth initiatives.
• Managed stakeholder expectations and communication, ensuring transparency and alignment.

MobiSystems, Inc.

• Built from scratch the product growth team of 10, overseeing strategies across iOS, Android, Windows, and web products with full P&L responsibilities.
• Collaborated with leadership, sales, and engineering to steer customer-centric product development and delivery.
• Partnered with Apple, Google, and AppsFlyer to meet desired KPIs and ROI.
• Owned monetization funnels for 5 products, implementing data-driven strategies to increase revenue leveraging $100K monthly ad spent.

Head of Product Growth / Marketing Director

• Managed development and design teams to deliver OfficeSuite for Windows and OfficeSuite Mail.
• Redesigned OfficeSuite iOS app, resulting in 10x growth in user base and revenue.
• Led a cross-functional team of 50 to oversee development and launch of new products (engineering, development, marketing, QA, design).
• Managed a product design team of 5 UI/UX designers, ensuring delivery of user-centric designs.

Senior Product Manager

Trading 212

• Managed a team of 10 developers (PHP, Frontend, JavaScript) to rebuild the product website, improving UX and functionality.
• Led a team of 6 UI/UX designers to deliver marketing materials and product designs.
• Oversaw project management and delivery of features and initiatives for 2M+ monthly visitors.
• Collaborated with JAVA engineers, JavaScript developers, DevOps, Customer Success and customer success to deliver projects aligned with business requirements.
• Ideated and executed revenue-generating initiatives, including promotions and campaigns reaching 1M+ customers.

Project Manager

Development Team Lead

Web Developer

Economedia

• Led, hired, and managed a team of 5 creatives (designers, animators, illustrators)
• Designed and developed UI for CRM, mobile, and web products with 1M+ monthly visitors
• UX design, usability, A/B tests, customer surveys, frontend development

Speaker
– UXSofia.com, 2011
– Design Day, 2010

Bulgarian web awards
– Winner, 2011 - Winepedia, mobile app
– Winner, 2012 - Internet media of the year (not bad for a media company)

Chief Design Officer (Web)

Senior Designer

Creato

Product, Growth, Monetization | Building Scalable Products & Businesses

Product leader with 15+ years of experience building top-quality B2B and B2C products and driving revenue growth. 

Proven track record of leading cross-functional teams of up to 50 people, crafting product vision, managing stakeholders, and making strategic decisions that deliver measurable business impact. Experienced in scaling products from early-stage startups to established enterprises.

Kosta's leadership style combines strategic vision, execution discipline, and data-driven accountability, enabling him to drive change and inspire teams to achieve ambitious goals. His focus on delivering measurable results and ensuring products reach their full market potential has consistently led to increased revenue and customer satisfaction.

Achievements:
• Led product growth strategies for a product portfolio, driving 10x increase in ARR to $4M for the section of the business under management
• Spearheaded agile transformation of 60+ developer team, achieving 3x faster release times and 45% decrease in bug reports
• Delivered SaaS BI tool for Experian's global Decisioning suite, seamlessly migrating 100 clients with zero downtime
• Increased customer retention by 25% and expanded ARR by 15% in 6 months by leveraging data, implementing JTBD framework, and introducing product-led growth initiatives

Strategic Leadership & Business Impact Skills:
• Strategic Vision & Leadership
• Go-To-Market Strategy & Execution
• Product-Led Growth (PLG) & SaaS
• Data-Driven Decision-Making & Business Metrics
• Revenue Monetization, Pricing & Value-Based Strategy
• Stakeholder Engagement, Executive Management & Strategic Partnerships

Operational Excellence & Execution Skills:
• Agile Methodologies & Team Leadership
• User Experience Research & Design (UX/UI)
• Competitive Intelligence & Trend Analysis
• Integrated Product Marketing & Growth
• Customer Relationship Management & Retention Strategies

taplio

The Battle

Dirk Sahlmer

Kostantin Stambolov 🇺🇦💪

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