Senior Software Engineer: Full-Stack

We are seeking a Senior Software Engineer: Full-stack with a strong command of modern front-end and back-end technologies, excellent code review practices, and a passion for collaboration and mentorship. In this role, you will contribute to the delivery of high-quality user interfaces with a scalable backend, provide technical leadership, and help elevate the performance of the engineering team through deep technical contributions and peer support.

What You'll do:

Code Quality & Technical Excellence

• Design and implement scalable, user-friendly full-stack applications.
• Develop efficient, lock-free SQL queries for optimal data storage, retrieval, and updates.
• Optimize application performance to achieve fast loading times.
• Build secure and scalable front-end and back-end systems capable of handling high traffic with minimal disruption.
• Create well-documented APIs for seamless third-party integration.
• Proficiency in analyzing and optimizing applications for efficient memory usage and high performance, with a solid grasp of time and space complexity.
• Can establish code quality standards; 
• Can be able to create frameworks for better code organization.
• creates standards for code reviews, implements automated quality gates;
• Drives best practices adoption

Collaboration & Cross-Functional Work

• Collaborate with:
• Product designers to translate Figma designs into performant, accessible UI components
• Backend engineers to define APIs and ensure seamless user journeys
• Actively participate in sprint ceremonies, including:
• Daily stand-ups
• Sprint planning and backlog refinement
• Retrospectives — contributing to continuous team improvement
• Lead task refinements where you are the designated Tech Owner
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 Production & Operational Readiness

• Own end-to-end debugging of production issues using tools such as:
• Datadog for tracing HTTP requests
• Logging and monitoring systems to identify root causes
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• Understand and leverage the team's CI/CD pipelines for efficient delivery
• Identify and share relevant documentation with new or existing team members
• Possesses a foundational understanding of at least one major cloud platform, such as AWS. 
• Proficiency in using the GIT version control system.
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 Autonomy & Ownership

• Work independently with little to no supervision
• Demonstrate proactive behavior — e.g., posting status updates, reviewing PRs, and following team processes without being prompted
• Exhibit strong verbal and especially written communication skills for effective documentation and collaboration. 
• Contributes to architectural discussions by providing a benefit analysis and outlining the pros and cons of proposed approaches.
• Proactively seeks out and researches new and emerging technologies.

Why Work for Us?

At Cellulant, we are more than a payments company: we are bridge-builders. We believe that by simplifying the way people pay and get paid, we are connecting companies to their ambitions, people to opportunities, and Africa to the global economy. Our work goes beyond payments—it’s about what people, businesses, and communities can do when the movement of money becomes more dependable, seamless, and secure. 

What we are looking for:

Technical Skills

Required Technical Skills:

Front-End Expertise:

• Advanced proficiency with the front-end technology stack, including React, TypeScript, JavaScript, and CSS-in-JS.
• Strong grasp of modern state management, component architecture, and front-end testing methodologies.
• Proven experience working with design systems and developing reusable UI components.
• Proficiency in backend integration and consuming REST APIs.

Back-End Expertise:

• Advanced proficiency in the backend technology stack: Java and Springboot.
• Solid understanding of at least one SQL language (e.g., MySQL, PSQL, or MSSQL).

General Development:

• Familiarity with Continuous Integration/Continuous Deployment (CI/CD) pipelines and relevant tooling.

Experience

• 5+ years of professional experience in front-end and backend development
• Proven track record of delivering high-quality front-end applications
• Experience mentoring engineers and leading technical discussions

Soft Skills

• Takes full ownership of responsibilities and outcomes.
• Excellent communication (written and verbal), collaboration, and documentation abilities.
• Highly self-managed, demonstrating the ability to deliver results with minimal supervision.
• Innovative and customer-centric, always considering the end-user's perspective.