Hire the Best Financial Services Freelancers
in Poland

CTO and Data/AI Architect with 15+ years building production systems, from early-stage products to Fortune 500 enterprise platforms across the UK, US, and EU. I focus on production ready & resilient architecture, clear technical strategy, and AI systems that deliver measurable outcomes in B2B data-rich environments. I've designed and shipped data platforms, agentic RAG systems, multi-agent workflows, AI copilots, and orchestration layers integrating knowledge graphs, semantic layers, and multiple data sources. Domains: SaaS, BI, process intelligence, analytics, fraud detection, supply chain, distributed systems. ① AI & Data RAG end-to-end: chunking, retrieval, reranking, evaluation, monitoring Knowledge graphs: schema design, entity resolution, hybrid KG+RAG retrieval (Neo4j) Multi-agent systems: ReAct, MoE, MoA, hierarchical workflows, tool-using agents Orchestration: MCP, A2A, agent routers, tool registries Observability: latency/cost budgets, guardrails, failure modes, rollout strategy ② Technology Python, SQL, Ruby | Microservices, event-driven, APIs ClickHouse, BigQuery, Redshift, PostgreSQL, Apache Iceberg, Kafka, dbt LangGraph, LangChain, LangSmith, CrewAI, AutoGen, GCP ADK Neo4j, Pinecone, pgvector, Qdrant, FAISS, OpenSearch Docker, Kubernetes, Terraform, Helm, CI/CD Grafana, Prometheus, Looker | AWS, GCP ③ What I Lead CTO-level leadership: strategy, roadmap, delivery governance Data platform architecture: pipelines, modelling, KPIs, governance, cost control AI productisation: prototype to production with evaluation, monitoring, and guardrails Team building: hiring, mentoring, accountability for predictable delivery If you need a CTO-level partner who can architect, build, and lead from strategy to execution, with depth in both AI/Data and engineering reality, I'm the right fit.

Senior Full-Stack & Cross-Platform Engineer | AI/LLM, Web, Mobile, Desktop Looking for an all-around Senior Software Engineer who can tackle any technical challenge - from high-level AI agents to low-level reverse engineering and cross-platform apps? With 15+ years of software development experience, I help businesses design, build, and scale complex applications across all major platforms and stacks. Whether you need a full-stack web application, an autonomous AI-driven workflow, or a high-performance cross-platform system, I deliver clean, maintainable, and scalable code. TECHNICAL CAPABILITIES AI & LLM Integration (Agentic Systems) 1.1. Building custom AI agents, fact-checking systems, and intelligent ad-selection engines. 1.2. Frameworks & Tools: LangChain, LangGraph, Semantic Kernel, n8n (no-code/low-code). 1.3. Providers & Models: OpenAI API, Anthropic, DeepSeek, Ollama (local LLMs), Hugging Face, OpenCV. Full-Stack Web Development 2.1. Backend: Python (FastAPI, Flask, Django), C# (ASP.NET Core, CoreAPI, Razor), PHP (Laravel, Drupal, WordPress), Node.js. 2.2. Frontend: React, Next.js, TypeScript/JavaScript, HTML5/CSS3. 2.3. Databases & ORMs: PostgreSQL, MySQL, MSSQL, MongoDB, CosmosDB, Neo4j, pgvector. Entity Framework, SQLAlchemy, Prisma/Next ORM, Django ORM. Desktop Application Development (Windows, macOS, Linux) 3.1. Cross-platform and native GUI apps: Qt (C++), WPF, Avalonia UI, Windows Forms, MFC. 3.2. Low-level system programming, socket communication, automation tools, and local encryption. Mobile Development 4.1. Cross-platform apps with React Native. 4.2. Native Android development (Java, C++ / NDK). 4.3. Networking utilities, proxy systems, and embedded WebViews. Cloud, DevOps & Automation 5.1. Cloud Platforms: AWS (Lambdas, Docker containers), Azure, GCP, Vercel. 5.2. Web Scraping & Automation: Human emulation algorithms, anti-bot bypass, automated checkouts, Selenium. 5.3. Reverse Engineering & Low-Level: .NET, Java bytecode, x86/x64/ARM Assembly. FEATURED PROJECTS & HIGHLIGHTS AI Fact-Checking Chat Engine: Engineered an embeddable LLM-powered fact-checking system using LangGraph + FastAPI, integrating custom web scrapers and computer vision (OpenCV). AI Ad Selection & Analytics: Built a real-time ad targeting system based on text/chat analysis using LangGraph, FastAPI, and cross-platform embedding SDKs. Enterprise Software Suites: Developed complex backend systems (C# CoreAPI, ASP.NET, Laravel, Node.js) managing real-time hardware & IoT control. Fintech & Microservices: Developed cloud-native financial services using C# and Python/Flask microservices deployed on AWS (Docker & Lambda). WHY WORK WITH ME? True Universal Mindset: I select the right tool, framework, and architecture for your specific goal rather than sticking to just one stack. End-to-End Ownership: From database design and cloud infrastructure to UI/UX implementation and deployment. Clean Code & Reliability: 20 years of writing maintainable, secure, and well-documented software. Got a complex project or technical challenge? Let's connect and discuss your requirements!

I build and rescue software where weak engineering gets expensive. ⭐ 10+ years delivering software for billion-dollar enterprises ⭐ Enterprise delivery for PPG & Thomson Reuters / engineering experience from JPMorgan, Google, Nike, Uber & Bank of America ⭐ Make Certified Partner + Zapier Solutions Partner ⭐ 12,000+ websites optimized in one production ecosystem ⭐ 16,000+ orders processed through a platform we delivered ⭐ 20× API performance improvement on a live franchise platform ⭐ 92% client return rate - our first client is still our client today And one rule: no junior handoff. We’ve spent years inside enterprise environments where “we’ll clean it up later” becomes a six-figure problem. That changes how we build. I’m Ihar, founder of Salamander Prime Solutions. When you hire me, you get one accountable senior engineer with our senior EU engineering core behind the delivery. The engineer you meet is the engineer who does the work. Backend, QA, DevOps, automation and delivery support come in when the project needs them. That is how we work. No junior bench. No anonymous handoff. No client poaching. What we are strongest at: ✓ Backend & APIs - business logic, auth, databases, caching, integrations, production fixes ✓ Automation & orchestration - Make, Zapier, webhooks, CRM workflows, reconciliation, retries, state handling ✓ Operational platforms - portals, order systems, approvals, internal tools, transaction-heavy workflows ✓ Data & CRM - pipelines, Salesforce, attribution, identity resolution, reporting, source-of-truth problems ✓ Web platforms - WordPress, WooCommerce, performance, checkout, integrations, migrations ✓ Legacy recovery - slow APIs, fragile integrations, poor visibility, systems nobody wants to touch anymore ✓ AI-assisted SDLC - Claude Code, Cursor, ChatGPT and agentic workflows across analysis, implementation, QA and documentation We care about ownership, observability, edge cases, handover and what happens after release - because production is where software starts proving whether it was engineered properly. Why clients bring us in: 🌍 Senior European engineering team 🧠 Senior engineers stay hands-on from first call to release ⚙️ Make Certified Partner + Zapier Solutions Partner 🔒 White-label friendly. No client poaching. 📋 Investigation, coordination and QA included on the first task 🏢 Enterprise delivery discipline without enterprise-vendor overhead You can hire another freelancer. Or you can put a senior engineering core behind the problem. If the work is fragile, stuck, integration-heavy, or simply too important to get wrong - send me the problem! We’ll tell you quickly whether we should own it.

My name is Michal, and I am an experienced Web Developer from Eastern Europe with a Bachelor of Science in Computer Science. With over 18 years of experience in building websites, I have developed a deep expertise in WordPress, which has become one of my core passions. My strong technical skills, coupled with a positive and solution-oriented attitude, enable me to efficiently overcome challenges and deliver successful project outcomes. Skills: - Building custom responsive themes from scratch, based on provided Figma / Sketch / PSD / Other files, - Any kind of provided theme customization, child themes, fixing bugs, responsive edits - ACF / Custom themes with any code you need, - PHP, JavaScript, jQuery, - WooCommerce - installation, integrate with theme, payment methods integrate, frontend and backend customizations, coding additional solutions, - Import/Export (MySQL database, users, posts, pages and others), - Migration, - Speed optimization / Security,