Senior Software Engineer (NodeJS & Python)

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.

🚀 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

🍕 Organised team events and outings

Massive Rocket, a global Martech agency specializing in Braze and Snowflake, is looking for a talented Senior Software Engineer ( Full-stack React/Typescript) to join our growing team. We work with clients across the U.S., U.K., and European Union, delivering cutting-edge marketing technology solutions.

As a Senior Software Engineer, you will be a key technical contributor within the engineering team, driving the development and maintenance of a cutting-edge platform. You will be responsible for designing and implementing complex features, ensuring high performance and scalability.

If you’re passionate about engineering, thrive in a global environment, and are eager to work on innovative projects, we’d love to hear from you.

- Participate in architectural discussions, propose solutions, and contribute to the evolution of the solution architecture.

- Design, develop, and maintain high-quality, scalable, and secure features across the entire technology stack.

- Identify and address performance bottlenecks across the entire stack, optimize application code, and ensure a smooth and responsive user experience, leveraging Python features for optimization.

- Design and implement RESTful APIs and GraphQL endpoints to power the front-end application and integrate with other services.

- Interact with databases (SQL and NoSQL), including data modeling, query optimization, and ensuring data integrity.

- Develop robust web scrapers for structured & unstructured data

- Productionalize and maintain Machine Learning models developed by the Data Science team

- Collaborate with data engineers on ML pipelines & stack

- Optimize and monitor scraper and model performance

- Work closely with data scientist, product managers, and backend engineers to translate requirements into technical solutions and ensure seamless integration.

- Continuously learn and evaluate new technologies and trends in front-end development to keep the platform at the cutting edge.

- Extensive experience: 5+ years of proven experience as a Full Stack Engineer or similar role with a strong focus on TypeScript , Next.JS and Python.

- Data expertise: 2+ years of experience with NumPy, Pandas

- Deep React experience: Mastery of React.js, including advanced concepts like state management (Redux, Zustand), performance optimization, and server-side rendering.

- Next.js knowledge: familiarity Nest.js framework

- TypeScript proficiency: Expert-level proficiency in TypeScript and its application in building robust and type-safe applications at scale.

- Testing and quality assurance: Strong understanding of testing frameworks and best practices for ensuring code quality and application stability.

- Strong API and Automation skills: experience developing REST APIs and automation using Python and Typescript

- Strong architectural understanding: Ability to design and implement complex systems, considering factors like scalability, maintainability, and security.

- Collaboration and Communication: Effective communicator and team player, comfortable working with cross-functional teams to deliver high-quality solutions.

- Agency experience: Experience working in an agency setting with clients

- English C1 Level: strong communication skills with professional level of proficiency in English

Desired Qualities:

- Innovative Problem-Solver: A creative thinker who can efficiently solve complex problems and adapt to new technologies and changing product requirements.

- Quality Advocate: Passion for quality and a dedication to understanding the user’s perspective and how it impacts the product's overall experience.

- Effective Communicator: Strong interpersonal and communication skills, with the ability to articulate issues, solutions, and concepts to technical and non-technical stakeholders alike.

- Leadership: The aptitude to mentor others and lead by example in software engineering practices is highly valued.

- Familiarity with DevOps practices and CI/CD pipelines.

- Experience with cloud technologies (e.g., Azure, AWS).

- Knowledge of medical device regulations and compliance.

• 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.