Senior Fullstack Developer (Java+Angular or React)

Expected, AWS

About the project, We are looking for an experienced Senior Software Engineer to focus on platform modernization, decoupling initiatives, and engineering excellence within core English, Language Learning systems., This role is hands‑on and delivery‑driven. You will work on critical, long‑lived services, supporting modernization efforts while ensuring stability, scalability, and quality of core, platforms.The expectation is strong technical ownership, independent execution, and the ability to drive complex engineering work within an established product landscape.

Your responsibilities, Platform & Modernization:, , • Drive modernization of existing services (refactoring, decomposition, and technical debt reduction)., • Support decoupling of monolithic components into well‑defined, scalable services Improve -, maintainability, resilience, and observability of core platform components., • Contribute to architectural improvements aligned with long‑term platform strategy., , Software Engineering:, , • Design, implement, and evolve backend services using modern engineering practices., • Write high‑quality, well‑tested, production‑ready code., • Actively participate in technical design and decision‑making., • Review code and contribute to shared engineering standards., , Quality & Reliability:, , • Promote strong automated testing practices (unit, integration)., • Ensure production readiness, including operability, monitoring, and logging, • Participate in incident analysis and drive follow‑up technical improvements when required

• Proven experience as a Senior Software Engineer on backend or platform systems., • Strong expertise in Java and modern backend development practices., • Experience with Spring Framework or other similar., • Comfortable using AI‑assisted development tools (e.g. Copilot, Cursor or equivalent)., • Hands‑on experience modernizing legacy systems or monoliths., , Practical experience with:, , • Trunk‑based development., • CI/CD pipelines., • Automated testing strategies., • Solid understanding of cloud‑based architectures (AWS and/or Azure)., • Experience designing APIs and service‑to‑service communication., • Ability to operate independently and deliver results in a contractor model., , What We Value in This Role:, , • Strong ownership and accountability for engineering outcomes., • Pragmatic approach to modernization (incremental, safe, value‑driven)., • Clear technical reasoning and decision‑making., • Quality‑first mindset with a strong bias toward delivery.

Optional, • Experience working on large‑scale, long‑lived enterprise platforms., • Exposure to observability or reliability engineering practices., • Front‑end experience (React or similar)., • Experience in education or learning platforms.

What we offer, Participation in interesting and demanding projects., Flexible working hours., A great, non-corporate atmosphere., Possibility to work remote or hybrid (2 days per week from the office)., Opportunities for development and promotion., Attractive package of benefits.

Benefits, sharing the costs of sports activities, private medical care, sharing the costs of foreign language classes, sharing the costs of professional training & courses, life insurance, flexible working time, fruits, integration events, no dress code, extra social benefits

We reserve the right to contact the selected candidates.

Transition Technologies MS S.A., Transition Technologies MS (TTMS) is a Polish software house supporting the digital transformation of business leaders worldwide., , We employ over 800 specialists - in Poland, the United Kingdom, Denmark, Switzerland, Malaysia, and India. Our Warsaw office is located in the prestigious Varso Tower., , We deliver ambitious projects for organizations such as NATO, ESA, Schneider Electric, Pearson, Volvo, and Bitronics – across the defense, pharmaceutical, energy, and manufacturing sectors. Our expertise spans AI, cloud (AWS, Azure, GCP), AEM, Salesforce, e-learning, Business Intelligence (Snowflake, Power BI), and process automation., , We are a certified partner of Microsoft, Adobe, Salesforce, Webcon, and Snowflake. As the first company in Poland to obtain an accredited ISO/IEC 42001 certification for AI management systems, we take AI governance seriously. We also have our own portfolio of AI products - built by experts who know the industry inside out and take pride in the solutions they create.

This is how we work,