Software Lead Developer (Python, LangChain, Docker)

Job Description Software Lead Developer (Python, LangChain, Docker) Job Location: Lodz Location Flexibility: Primary Location Only Req Id: 12966 Posting Start Date: 10/6/26

Highly skilled and experienced L Software Lead Developer (Python, LangChain, Docker) with a strong background in building scalable, secure, and high‑performance backend systems. Known for exceptional problem‑solving skills, ownership mindset, and a collaborative approach that strengthens team dynamics. Adept at designing modern architecture, mentoring developers, and driving engineering excellence. A true team player who consistently aligns technical decisions with business goals.

Core Competencies

• Leadership & Collaboration
• • Leads cross‑functional engineering teams with clarity and empathy.
    • Coaches developers in coding standards, architecture patterns, and best practices.
    • Facilitates effective communication between technical and non‑technical stakeholders.
• Software Architecture & System Design
• • Designs modular, testable, and scalable backend systems.
    • Experienced in event‑driven architecture, microservices, and API‑first design.
• Quality & Reliability
• • Strong advocate of automated testing, observability, and CI/CD best practices.
    • Brings a quality-first mindset to code reviews and team processes.

Technical Skills

Primary Technologies (Expert Level)

• Python – advanced software design, async programming, performance optimization
• LangChain / LangGraph – building LLM-powered applications, agentic workflows, vector integrations
• Docker – containerization, multi‑stage builds, optimized production images
• Entra ID (Azure AD) – authentication/authorization flows, OAuth2, OpenID Connect
• GitLab – branching strategies, merging workflows, pipelines
• LangSmith – LLM monitoring, evaluation, tracing
• FastAPI – designing high‑performance REST services and backend APIs
• Pytest – unit/integration testing, fixtures, mocks
• Postgres – schema design, query optimization, migrations
• Azureite – Azure Storage emulation for local development
• Poetry – dependency & environment management
• Pydantic – data validation, settings management, typed models
• OpenTelemetry – distributed tracing, metrics, logging

Nice to Have (Working Knowledge)

• Neo4j – graph databases, Cypher queries
• CI/CD Pipelines – design, automation, release workflows

Professional Traits

• Proactive, reliable, and driven by continuous improvement.
• Thrives in collaborative environments and champions team success.
• Communicates complex technical concepts with clarity and confidence.
• Values craftsmanship, clean code, and scalable architecture.
• Enjoys mentoring and helping others grow technically.

Why Fujitsu?

We combine innovation with purpose, empowering you to bring your whole self to work. Join us and help shape a future where technology improves lives. Ready to start your journey? Click “apply” and take the first step toward a career that’s as inspiring as it is rewarding.

Based on Article 24(6) of the Act of 14 June 2024 on the Protection of Whistleblowers (Journal of Laws of 2024, item 928), the employer provides information on the internal reporting procedure in force at Fujitsu Poland Sp. z o.o. The procedure is available at the following links: Internal-reporting-procedure.pdf , Procedura-zgłoszeń-wewnętrznych.pdf

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