Back-End Developer (Braze CRM Experience)

Who We Are

Massive Rocket is a high-growth Braze & Snowflake agency that has made significant strides in connecting digital marketing teams with product and engineering units. Founded just 5 years ago, we have experienced swift growth and are now at a crucial juncture, aspiring to reach $100M in revenue.

Our focus is on delivering human experiences at scale, leveraging the latest in web, mobile, cloud, data, and AI technologies. We pride ourselves on innovation and the delivery of cutting-edge digital solutions.

Every role at Massive Rocket is Entrepreneurial - Successful people at Massive Rocket will not only think about their role but understand the roles around them, their goals, and contribute to the success and growth of their team, customers, and partners.

What We Offer

🚀 Fast-moving environment – you will never stop learning and growing

❤️ Supportive and positive work culture with an emphasis on our values

🌍 International presence – work with team members in Europe, the US, and around the globe

🪐 100% remote forever

🧗🏼‍♂️ Career progression paths and opportunities for promotion/advancement

🍕 Organised team events and outings

What we’re looking for

We are looking for a skilled and reliable Back-End Developer with hands-on experience working with Braze CRM. This role is perfect for a backend-focused developer who is confident navigating service-oriented architecture and solving medium-sized engineering problems, while collaborating with teams across product, marketing and operations.

You will be responsible for integrating Braze with internal platforms, building backend services that support multi-channel communication (Email, Push, IAM, Content Cards, WhatsApp) and ensuring CRM campaigns are scalable, data-driven and performant.

Responsibilities

• Design and implement robust backend services and microservices to support CRM functionality and campaign logic, using languages such as Java, Python, or Golang. Ensure services are modular, testable and scalable to meet evolving campaign and integration needs

• Develop and maintain integrations between Braze and internal platforms

• Support the build and optimisation of campaign templates (Emails, IAM, Push, Content Cards, WhatsApp) which use tools like JSON, Liquid, Handlebars, MJML

• Collaborate with product and marketing stakeholders to translate requirements into scalable technical solutions

• Own medium-sized technical problems and deliver working, well-documented solutions

• Contribute to code reviews, release cycles and team ceremonies

• Document services, features and decisions to support long-term maintainability

• Diagnose and resolve performance issues across CRM campaigns and related backend services

• Support QA and deployment processes to ensure defect-free CRM experiences

Required Skills and Qualifications:

• Ideally 4+ years of backend development experience

• Strong development skills in coding languages e.g. Java, Python, etc (essential)

• Experience in coding Golang (preferred, but not essential)

• 2+ years of hands-on experience with Braze CRM, including:

• Building and managing Braze campaigns (Email, Push, IAM, Content Cards, WhatsApp)

• Working with Braze Canvas and Liquid or similar templating engines

• Solid understanding of RESTful APIs, event-driven architectures, and microservices

• Experience with templating languages (Hendlebars.js, MJML, Liquid, etc.)

• Proficiency in HTML, CSS, JavaScript for CRM asset customisation

• Comfortable working with JSON data models

• Familiarity with GIT and continuous integration/deployment workflows

• Working knowledge of non-functional requirements (performance, accessibility, security)

• Braze Developer Certification preferred.

• English at C1 level

Soft skills:

• Communicates clearly and confidently with both technical and non-technical audiences

• Seeks timely feedback and guidance while demonstrating independent problem-solving

• Provides actionable feedback to peers and participates actively in code reviews

• Documents features and services with clarity and consistency

• Demonstrates steady delivery and progress on assigned tasks

• Experience collaborating with designers, project manager and other stakeholders to deliver technical solutions that meet business objectives.

Bonus:

• Experience working an agency setting or working with external clients.

• Basic knowledge of SQL for data manipulation and retrieval.

• Braze Certifications (Braze Practitioner, Braze Marketeer, Braze Strategist, Braze Technical Architect)

• Exposure to campaign design principles or UX/design awareness

Other information:

Candidates will be required to complete a technical coding assessment as part of the hiring process.

During the process, please note the following requirements and preparations:

- Massive Rocket has a Bring Your Own Device (BYOD) policy — you will be expected to use your own equipment for work.

- A valid work visa is required — Massive Rocket does not provide sponsorship at this time.

- You may be asked to provide proof of identification, such as a passport, ID card, or utility bill (gas, water, electricity).

- Two references may be requested — please be prepared to share names, relationship to you, and contact details (email and mobile).

- Contractors only: Proof of incorporation and valid insurance coverage is required.

Note: Please ensure that your qualifications closely match the criteria outlined in the job description. Applications not meeting the specified criteria may not be processed or considered for this position.