Senior MuleSoft Developer

Gen25; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid Working Model

25 days annual leave + bank holidays

Pension contributions

Certification sponsorship (MuleSoft/SF

Job summary

Gen25 Ltd in London seeks a Senior MuleSoft Developer to architect, build and deploy enterprise-grade integrations on the MuleSoft Anypoint Platform. You will connect complex backends (Salesforce, SAP, databases) using API-Led connectivity and lead technical delivery with a focus on security and performance.

The role requires 5+ years of MuleSoft experience, strong DataWeave 2.0 and RAML/OAS skills, and UK-English communication.

Qualifications

• 5+ years of hands-on integration development with the MuleSoft Anypoint Platform.
• Strong DataWeave 2.0, RAML/OAS, and Java OO concepts.
• Experience with Salesforce, SAP, or other backend integrations.
• Delivery in Agile/Scrum with Git and CI/CD workflows.
• Excellent verbal and written UK English communication.
• Eligibility to work in the United Kingdom without sponsorship.
• MuleSoft Certified Developer/Architect certifications are a plus.

Responsibilities

• API-Led Integration: Design, develop, and test APIs using Anypoint Studio, RAML, and DataWeave.
• Architecture & Governance: Establish integration patterns, secure policies, and error handling across environments.
• DevOps & Testing: Implement robust MUnit tests and automated CI/CD pipelines for zero-downtime releases.
• Technical Leadership: Conduct code reviews and mentor other developers in the practice.
• Client & Stakeholder Collaboration: Lead discovery sessions and document mappings clearly.

Skills

MuleSoft Anypoint Platform

DataWeave 2.0

RAML/OAS

Java / OO

REST / SOAP / JSON / XML

Kafka / JMS

Salesforce integration

CI/CD

UK English communication

Right to Work in the UK

Tools

Anypoint Studio

MuleSoft Runtime Fabric

CloudHub

Jenkins

Git

Maven

Job description

As a Senior MuleSoft Developer, you will sit at the centre of our technical delivery team in London. You will architect, build, and deploy enterprise-grade integrations on the MuleSoft Anypoint Platform, connecting complex backend ecosystems (Salesforce, SAP, legacy databases, REST/SOAP web services) using MuleSoft’s API-Led Connectivity framework (System, Process, and Experience layers).

You will work closely with Solution Architects, Salesforce Consultants, and client stakeholders to translate complex business needs into secure, performant, and scalable solutions.

Key Responsibilities

• API-Led Integration & Build: Design, develop, and test System, Process, and Experience APIs using Anypoint Studio, RAML, and DataWeave 2.0.
• Architecture & Governance: Establish integration patterns, reusable data models, security policies (OAuth 2.0, mTLS, JWT), and error-handling strategies across CloudHub and Runtime environments.
• DevOps & Testing: Implement robust MUnit test suites (>80% coverage) and automated CI/CD pipelines (Git, Maven, Jenkins/GitHub Actions) for zero-downtime releases.
• Technical Leadership: Conduct rigorous code reviews, enforce coding standards, and guide other developers within the practice.
• Client & Stakeholder Collaboration: Lead discovery sessions, document source-to-target field mappings, and articulate technical decisions clearly to technical and business audiences.

Essential Experience & Skills

• Proven Track Record: 5+ years of hands-on integration development experience with the MuleSoft Anypoint Platform.
• Core Languages: Deep expertise in DataWeave 2.0, RAML/OAS, and core Java/Object-Oriented Programming principles.
• Integrations: Strong background in REST, SOAP, JSON, XML, event-driven messaging (Kafka, JMS), and connector configs (Salesforce, Database, HTTP).
• Delivery: Experience working in Agile/Scrum environments with version control tools (Git) and CI/CD tools.
• Communication: Exceptional verbal and written communication skills in UK English.
• Eligibility: Unrestricted Right to Work in the UK (UK Passport, Indefinite Leave to Remain, or settled status).
• Active MuleSoft Certified Developer (Level 1 or 2), MCIA (Integration Architect), or MCPA (Platform Architect) certifications.
• Hands-on experience with Salesforce platform integrations (Sales/Service Cloud, Data Cloud) or AWS.
• Experience with CloudHub 2.0 or Runtime Fabric (RTF).

What we offer

• Competitive Salary & Package: Excellent base salary reflective of senior experience, pension contributions, and performance-related incentives.
• Career Path & Certifications: Sponsorship to gain advanced MuleSoft and Salesforce certifications.
• Hybrid Working Model: Flexible working arrangements combining working from home with collaborative team days at our Southwark office.
• Agile Culture: A flat, collaborative culture where your voice shapes engineering practices and solution architectures.
• Perks & Socials: Regular team socials, 25 days annual leave + bank holidays, and modern workspace facilities.

Please Note: Applicants must have existing, permanent, and unrestricted legal right to work in the United Kingdom prior to applying. Gen25 Ltd cannot provide visa sponsorship or visa transfers for this role.

Gen25 is an innovative digital transformation consultancy and official Salesforce Summit Partner. We build high-performing digital environments for leading brands, combining deep expertise across Salesforce, AWS, and MuleSoft.

At Gen25, we champion clean code, API-led architecture, agile teamwork, and automated CI/CD pipelines. We are expanding our UK integration practice and are looking for an experienced Senior MuleSoft Developer to lead the technical delivery of multi-cloud enterprise integration solutions.