Senior Full Stack Engineer Location: London, England, United Kingdom Hybrid Full-time Job Description: Creditstar Group is a rapidly growing international consumer finance company, headquartered in Tallinn, Estonia and operating in multiple European markets. At the core, we are a financial technology company that uses automated processes, algorithms and data analysis to make financial instruments easily available to a population of more than 175 million people in our target markets. We are a team of ambitious professionals who value innovation, effective efficiency, high growth, and high performance. For more information on the group, please visit www.creditstar.com. Our vision is to build and deliver digital banking products of the future. If you want to be part of this, here is your chance. YOUR POSITION: FULL STACK ENGINEER YOUR ROLE: We are looking for a solution-focused person, who is a great communicator and a team player. Your role is to participate in product and platform development - work closely with the revolving credit product team to develop new features, frameworks and detailed application designs on core architecture of the company’s backend system and develop and maintain scalable software solutions and high-quality web platforms that are built up automation in mind. YOUR DAILY ACTIVITIES INCLUDE: - Designing and coding our backend and frontend systems. - Solving technical challenges and fixing bugs. - Follow and maintain coding standards and best practices. - Conduct functionality testing and write automated tests.. - Define and document technical solutions and best practices. Requirements - Extensive experience with modern PHP, with the ability to leverage the strengths of the language. - Good analytical, problem-solving and communication skills. - You have a strong passion for technology and love to code. - You have worked with relational databases like MySQL or PostgreSQL before. - You thrive in a fast-paced, results-oriented environment. You are self-motivated and proactive, able to work independently in a fully remote team setup. - Proven ownership mindset—taking initiative, solving problems proactively, and driving solutions forward. NICE TO HAVE: - Experience with the Yii2 framework is a plus. - Experience with NodeJS is a plus. - Experience with React or other major JavaScript frameworks. - Financial service development background. - Experience with distributed systems. - You love optimization and the beauty of automation. TOOL STACK: - PHP, Yii2, HTML/CSS, Javascript, Typescript, PostgreSQL - React, Nodejs, Jquery - Docker - Atlassian products - Datadog, Sentry - AWS Benefits - Dynamic, challenging, and rewarding work within a rapidly growing international company; - Chance to contribute to the business' decision-making processes and making a tangible impact; - Talented and fun international team who always has your back. - Sports or Health insurance compensation - Paid birthday day- off - Regular company parties and events; - Office with games, ping pong table, free snacks/drinks and the possibility to work remotely; - Powerful equipment and modern tools; - On-demand sponsorship for your professional development; - Competitive remuneration package.

• Responsible for designing, supporting, and continuously improving enterprise B2B/EDI and managed file transfer solutions • Own end-to-end reliability of document/file exchanges using IBM Sterling B2B Integrator and Connect:Direct (SFTP/FTP) • Partner with internal teams and external vendors to resolve issues • Deliver automation and enhancements through Java/Spring and UNIX scripting to improve stability, throughput, and operational efficiency in a 24x7 environment • Manage high-volume B2B/EDI operations in a 24x7 environment using IBM Sterling B2B Integrator (B2Bi), ensuring platform stability, performance, and uptime • Design, build, and maintain B2B messaging flows including communication protocols, routing, processing rules, and end-to-end document lifecycle handling • Ensure on-time, accurate EDI document transmission and processing by partnering with internal/external communications teams and proactively addressing throughput and failure points • Implement and support EDI/B2B mappings and drive new trading partner/vendor onboarding, including setup, testing, certification, and production cutover • Implement and administer Connect:Direct secure file transfer solutions, including configuration, scheduling, monitoring, and troubleshooting of processes across systems • Troubleshoot complex integration and transmission issues across host systems, servers, and external partner connections; perform root-cause analysis and implement durable fixes • Partner with third-party vendors to resolve platform/software defects, coordinate escalations, and ensure timely remediation with clear root-cause understanding • Monitor EDI and communication subsystems and respond to alerts, driving rapid triage, restoration, and stakeholder communication as needed • Collaborate with production support and engineering teams to deliver strong incident, problem, and change management outcomes (including post-incident follow-ups) • Drive operational excellence and automation, reducing recurring incidents through standardization, self-healing/automated recovery, and continuous improvement initiatives • Create and maintain technical and operational documentation (runbooks, onboarding guides, mappings/flows, support procedures) to ensure consistency and knowledge continuity

• Design, build, and deliver backend systems and APIs. • Build and maintain full-stack product features. • Provide technical leadership. • Collaborate across disciplines. • Support and own your software in production. • Communicate clearly and multiply your impact.

• Design, build, and deliver backend systems and APIs. • Build and maintain full-stack product features. • Provide technical leadership. • Collaborate across disciplines. • Support and own your software in production. • Communicate clearly and multiply your impact.