Senior Mendix Developer

Overview

Senior Mendix Developer is responsible for designing, developing, and maintaining

high-quality Mendix applications that align with business objectives and software

development standards. This role combines strong technical expertise in Mendix with

the ability to guide junior developers, collaborate with stakeholders, and drive best

practices across the low-code application lifecycle.

Key Responsibilities

Application Development & Architecture

• Design, build, and deploy Mendix applications using best-practice architecture
  
  

and development patterns.

• Translate business requirements into scalable, maintainable, and high-quality
  
  

Mendix solutions.

• Develop complex domain models, microflows, nanoflows, workflows,
  
  

integrations, and UI components.

• Build custom components using java actions (written as per Java best practices
  
  

& company conventions)

• Design and implement robust Mendix security models (user roles, module roles,
  
  

entity access, page access, microflow access) strictly adhering to the principle

of least privilege and Mendix security best practices.

• Ensure application performance, scalability, reliability, and compliance with
  
  

enterprise performance standards.

• Conduct thorough code reviews to enforce quality, consistency, and
  
  

maintainability.

• Implement robust auditing, logging, and monitoring mechanisms while
  
  

championing true DevOps, BizDevOps, and SecDevOps principles throughout

the application lifecycle

• Build productized modules that are reusable in other apps and projects
• Design and deliver robust Mendix mobile apps with emphasis on reliable offline
  
  

synchronization, high performance, secure local data handling, custom native

functionality, and streamlined iOS/Android build & deployment processes.

Integration & System Design

• Integrate Mendix applications with external systems via REST, SOAP, OData,
  
  

Kafka, databases, identity providers (OIDC, Azure AD), etc.

• Design highly modular and reusable components (modules, microflows,
  
  

nanoflows, snippets, document templates).

• Strong experience working with Mendix Building Blocks
• Collaborate with enterprise architects, infrastructure teams, and system owners
  
  

to align solutions with the broader IT landscape.

• Lead technical discussions with external teams on security, network, and
  
  

infrastructure topics.

• Engage in detailed technical discussions regarding published/consumed APIs
  
  

(endpoints, versioning, authentication, rate limiting).

• Design, document, and publish APIs following REST/SOAP best practices
• Strong documentation discipline: clean/readable code, comprehensive in-app
  
  

documentation, and complete handover/technical delivery documents (e.g. LLD,

API documentation..etc) for clients

Leadership & Collaboration

• Mentor and coach junior and Intermediate-level Mendix developers on best
  
  

practices and advanced techniques.

• Lead technical discussions, solution-design workshops, sprint planning, and
  
  

refinement sessions.

• Work closely with product owners, business analysts, and stakeholders to clarify
  
  

requirements, refine user stories, and define acceptance criteria.

• Promote and enforce Mendix development best practices and reusable
  
  

components.

• Provide accurate effort estimation for tasks, user stories, enhancements, and
  
  

bug resolutions.

Requirements

Required Skills & Qualifications

Technical Skills

• Mendix Advanced or Expert certification (Expert strongly preferred)
• 3+ years of experience developing Mendix applications
• Delivered Mendix applications into production (at least 1 complex application)
• Expert-level knowledge of domain modeling, microflows, nanoflows, security
  
  

model, Java actions, JavaScript actions and Mendix best practices.

• Experience with Git-based development, CI/CD pipelines, and automated
  
  

deployments.

• Strong experience with REST/SOAP web services, API design and documentation
  
  

and API best practices.

• Proficient in leveraging AI tools (Copilot, Grok, ChatGPT, Maia) to accelerate
  
  

development, debugging, documentation, design, and professional

client/stakeholder communication.

• Proven ability to design and maintain comprehensive documentation (API, Low
  
  

Level Design...etc).

• Proficient in Microsoft Word and Excel for documentation and reporting
  
  

purposes.

• Strong Java and JavaScript proficiency for custom actions, debugging complex
  
  

logic, and performance optimization.

• Advanced SQL skills including writing and optimizing complex queries, joins, and
  
  

indexing.

• Hands-on experience with On-Premise environments and cloud environments
  
  

(Mendix Cloud, Azure, or OpenShift environments).

• Solid understanding of Mendix architecture, integrations, APIs, and security
  
  

concepts.

• Solid understanding of networking, certificates, firewalls, and proxy
  
  

configurations in enterprise contexts.

• Performed multiple Mendix Major upgrades
• Strong expertise in Mendix Mobile: offline/sync logic, performance optimization,
  
  

security, secure mobile storage/encryption, and managing app builds, signing,

and store distribution.

Soft Skills

• Excellent analytical and problem-solving skills - particularly for complex
  
  

integration and performance issues under tight deadlines - while remaining calm

and positive during high-pressure situations or crises.

• Excellent verbal and written communication skills; ability to write clear,
  
  

professional client emails and documentation and conduct client-facing

discussions.

• Strong stakeholder-management and facilitation skills for workshops and
  
  

requirement sessions.

• Thrives in agile/scaled-agile and waterfall environments; adept at managing
  
  

scope, bridging customer expectations, and enforcing process in structured

deliveries.

• Highly pro-active: identifies blockers, proposes solutions, and drives initiatives
  
  

when progress slows down or new opportunities arise

• Proven ability to work independently while leading technical workstreams
  
  

Preferred Experience

• Previous experience leading Mendix development teams
• Experience with Mendix tools such as QSM
• Hands-on experience with containerization (Docker, Kubernetes) and private
  
  

cloud Mendix deployments

• Participation in Mendix Capture the Flag (CTF) events or proven ability to
  
  

demonstrate Mendix security vulnerability concepts.