Deltologic

Deltologic is a software agency based in Poznań, Poland, with an office in Berlin. Founded in 2020 as "Self Made," the company rebranded to Deltologic in 2021 and has spent the last four years building custom software and automation for companies selling on global marketplaces—Amazon, eBay, Walmart, Shopee, and others. The team combines software engineers, solution architects, and project managers. They work with over 140 companies ranging from individual sellers to Fortune 500 operations, with 97% of clients saying they would recommend the service.

Deltologic's focus is deliberate: they specialize in marketplace technology rather than offering generalist software services. In 2022, they partnered with academic institutions to research marketplace mechanisms, which shaped their service offerings. The company operates as a technology partner, not just a delivery vendor—most projects evolve into ongoing collaborations. They emphasize understanding a client's business model before writing code, transparent communication, and pragmatic decision-making over overengineering.

Services and capabilities

Deltologic offers six core service areas. Marketplace Data Integration connects businesses with marketplace platforms through APIs and custom integrations, pulling data to Excel, SQL, BI tools, or custom dashboards. Software & Automations Development builds custom applications that streamline processes and reduce manual work—they automated 52 manual processes for one client over two years. End-to-End SaaS Development creates subscription-based, scalable solutions for marketplace sellers. Marketplace Data Extraction uses web scraping and data mining to extract insights from marketplaces and track competitors. Tech Consulting provides architecture advisory and 1:1 sessions on API optimization and platform scalability.

Beyond those five, Deltologic offers specialized Amazon services: Amazon SP-API Optimization & Audit (reducing redundant API calls and fees ahead of 2026 fee increases), MWS to SP-API Migration, and an Amazon SP-API Course covering setup through advanced integrations with code samples. They also conduct AI & Data Audits to identify automation opportunities.

The firm has deep expertise in Amazon's Selling Partner API, which appears across the majority of their work. They also build integrations with eBay, Walmart, Kaufland, Allegro, and Mercado Libre. Technology includes custom web scrapers, ERP system integrations, Google Sheets automation, and cloud-based architectures.

Notable work

Deltologic's case studies name specific outcomes. For Swiss Auto, a car auction platform, they built fully automated web scrapers and integration, delivering a 119% ROI in the first year. For Wunderpen (a German printing company), they automated 52 manual processes and built a customized webshop. For Wraplab, they delivered a complete SP-API integration in one week—a project previous developers couldn't complete in 8 months.

They built Acorn, a multi-module SaaS for Amazon wholesale sellers. For Comply PRO, an Amazon agency, they developed an automated compliance monitoring system and notifications tool. For Vaso Group, they optimized SP-API architecture, reducing API costs and improving system performance. For a Fortune 500 company, they extracted and analyzed millions of data points from marketplaces. Other work includes Amazon Buy-Box monitoring and repricing tools, FBM/FBA order automation linked to ERP systems, and custom price-tracking software for European sellers.

Clients who provide testimonials include Hisco Inc. (VP of IT), Moin Marketing GmbH (co-founder), Greenwald Brands (CEO), PLEC—Brands Edge On Amz (CEO), Comply PRO (CEO), Vaso Group (data engineer), eGrowth Partners (CEO), and ZEW Mannheim (researcher).

How they work

Deltologic operates as a long-term partner rather than a transactional vendor. Their approach centers on understanding a client's business model before writing code, maintaining transparent communication, and making pragmatic decisions instead of overengineering. They collaborate closely with internal teams to ensure alignment between business and technology, with clear ownership of outcomes at each stage. Most projects evolve into ongoing collaborations where systems are refined and expanded together. The firm emphasizes shared partnership, not hand-offs. Specific pricing and standard engagement terms are not detailed on their public site—inquiries go through a contact form.

Team and credentials

Deltologic was founded in 2020 by two friends. The company rebranded in 2021 and has grown to include experienced software engineers, solution architects, and project managers, though exact headcount is not disclosed. In 2024, they established a new headquarters in Poznań and launched one of the first dedicated Amazon SP-API education programs. They have integrated AI technologies into client solutions and entered strategic partnerships with Fortune 100 organizations. The firm publishes resources on software, automation, and online sales to share industry knowledge. While no ISO, SOC 2, or other formal certifications are mentioned in the source material, their partnership with academic institutions and participation in international conferences suggests credibility in the marketplace technology space.