Marcin Zieliński
Senior Forward-Deployed Engineer
Wrocław, Poland · UTC+1 · 11 years of experience
Marcin focuses on taking enterprise AI integrations from pilot to production and daily use.
Request a shortlistWhy this profile fits
Enterprise CRM and ERP integration
Connects AI features to systems such as Salesforce, Dynamics, SAP, internal APIs, and operational data.
Customer-embedded delivery
Works inside the client environment, turns unclear requirements into a shipped workflow, and closes the last-mile gap.
Production governance
Builds observable services, approval gates, access boundaries, and a rollout path teams can operate.
Relevant toolkit
Python
TypeScript
PostgreSQL
React
DockerDelivery evidence
Selected work
Support Copilot for a B2B SaaS Platform
B2B SaaS scale-upEmbedded copilot that drafts citation-grounded replies for support agents using RAG over a 40,000-article help center and full ticket history. Cut median first-response time from 14 minutes to under 4 and lifted agent adoption to 78% within nine weeks.
In-Product Financial Assistant
Fintech scale-upConversational copilot inside a banking dashboard that answers account questions and initiates money-movement flows through guarded tool-calling with human-in-the-loop confirmation. Grew to 34,000 weekly active users while cutting common-task support tickets by 38%.
Relevant experience
Career timeline
Forward-Deployed Engineer
2023–PresentFintech Scale-up (Contract via Devlyn) · Remote / Wrocław, Poland
- Embedded with product and support teams to ship an in-dashboard financial copilot on Claude and GPT-4, growing weekly active usage from 0 to 34,000 users within two quarters of launch.
Forward-Deployed Engineer
2020–2023B2B SaaS Platform (Contract via Devlyn) · Remote / Wrocław, Poland
- Took a stalled support-copilot pilot from 22% to 78% agent adoption in 9 weeks by rebuilding RAG over a 40,000-article knowledge base and adding citation-grounded reply drafting.
Senior Full-Stack Engineer
2017–2020HealthTech Product Company (Contract via Devlyn) · Wrocław, Poland
- Led development of a clinician-facing onboarding assistant and rules-based chatbot, lifting activation of new accounts by 27% quarter over quarter.
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Skill depth
Show experience in context.
Relevant experience by skill
See the complete skill index
Languages
Frameworks
Libraries/APIs
Tools
Paradigms
Platforms
Storage
Education
Formal background
MSc, Software Engineering
Wrocław University of Science and Technology · 2013–2015 · Graduated with distinction
BSc, Computer Science
Wrocław University of Science and Technology · 2010–2013
Credentials
Certifications
Salesforce Certified Platform Developer I
Salesforce · 2024 · Certified
AWS Certified Solutions Architect – Professional
Amazon Web Services · 2023 · Certified
Communication
Languages
Polish
Native
English
Fluent
German
Professional
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