Senior Full-Stack Engineer — FinTech Billing Platform

SD Solutions; Warszawa; On-site; PLN 180,000 - 270,000; Full time

Job summary

SD Solutions is seeking a Senior Full Stack Developer for a Billing project with a major FinTech client. The role requires leading the full feature development cycle and collaborating with cross-functional teams to deliver robust payment and invoicing solutions.

You will work closely with product owners, architects, and QA to design, implement, and document scalable features, primarily using Java on the backend and Angular on the frontend. A proactive, results-driven mindset is essential.

Qualifications

• 5+ years of Java experience.
• 3+ years of frontend (Angular) experience.
• Be responsible and proactive.
• Produce high-quality deliverables with a strong technical background.
• Willingness and passion to constantly improve Billing domain knowledge.
• Experience in an Agile environment and SCRUM framework.

Responsibilities

• Collaborating with the product owner to clarify requirements and expectations.
• Collaborating with the product owner to advise on the best UX approach.
• Designing the solution and effectively communicating with and getting feedback from various teams (such as Architecture, Security, BI, DBA, Bizops, etc.).
• Creating technical documentation with UML diagrams on Confluence.
• Implementing the solution following best practices and standards.
• Collaborating with the QA team.
• Supporting production incidents.

Skills

Java

Angular

Agile / Scrum

Proactive

Tools

Confluence

Job description

SD Solutions is seeking a Senior Full Stack Developer for a Billing project with a major FinTech client. The role requires leading the full feature development cycle and collaborating with cross-functional teams to deliver robust payment and invoicing solutions.

You will work closely with product owners, architects, and QA to design, implement, and document scalable features, primarily using Java on the backend and Angular on the frontend. A proactive, results-driven mindset is essential.