Senior Application Developer - Python (m/f/d)
deutschetelekomitsolutionsslovakia
Košice, Košický kraj, Slovakia (Slovak Republic) · Košice · Slovakia
Posted May 28, 2026
- Full-time
- Hybrid
- Telekom IT Slovakia
- Mid-Senior Level
deutschetelekomitsolutionsslovakia
Košice, Košický kraj, Slovakia (Slovak Republic) · Košice · Slovakia
Posted May 28, 2026
Company Description Our brand Deutsche Telekom IT Solutions Slovakia entered the life of Košice region in 2006 under the name of T-Systems Slovakia and ever since has been inextricably linked with the region when became one of the founding members of Košice IT Valley. We have managed to grow from scratch to the second largest employer in the eastern part of the country with more than 3900 employees. Our goal is to proactively find new ways to improve and continuously transform into the type of company providing innovative information and communication technology services. Job Description Purpose Develops new and maintain existing source code of applications in programming language like python, FastAPI, MongoDB, Pydantic, BeanieODM, pytest, poetry based on requirements of internal or external customers. These applications support usually automation of business processes. Works independently or in project team on developing and building midsize and complex application for customer usage. Handles all phases of software development lifecycle by himself, especially for midsize applications, provides professional support in the field of deep system analysis, technical documentation, building related infrastructure for developed application by prototyping, research. Performs role of lead development architect, substitutes the role of project manager in case of small or midsize software projects, serves as professional mentor WHAT WILL YOU DO? Listen to user requests, consult with internal /external customers, project managers, assist in gathering requirements for preparation of application detailed feature specification as necessary basis of quality and functional application Analyze of customer’s requirements and propose overall application / framework design of midsize application architecture (incl. interfaces, relation database structure), provide complex business analysis in order to build application functionality easy for maintenance and future extension according to customer needs as business intelligent solution that implements business processes in automated form Provides project estimates, timeline like total number of development hours, total number of testing hours and bug fixing and report it to customer for budget planning in advance Implements customer’s requirements based on specification in selected object oriented programming language (python, No SQL, Camunda) into functional and user friendly application to meet customer’s needs Provides testing of programmed functionality before deployment in order to avoid bugs and ensure quality of code Implements security concept according to PSA policy in developed application to ensure accordance with DTAG standards Write and update regularly complex technical / system documentation (e.g. Authorization concept) for success of penetration tests and also for official handover to operation process, also create analytical documentation incl. UML for other programmers and customer Communicate project status and deliverables to managers, customer with efficiency and accuracy of any progress or delays to keep them informed and let them be ready for managerial decision and project’s adjustment in advance Maintain application on 2nd, 3rd level support by fixing bugs and regular check, programming updates of features on customer’s change request to satisfy customer needs and to ensure smooth running of the application with added value Record spent time daily in transparent way to have basis for invoicing for customer and Controlling department purpose Perform deploy on infrastructure, backup and restore procedures, handle release management in order to provide regular upgrades of software to have up to date features implemented according to agreement with customer Performs a full software migration, incl. infrastructure hints how to build a production environment suitable for smooth running of the application Contributes to knowledge base of developers / users within the company by trainings in order to reduce future effort on 1st, 2nd level application support Makes proposals for optimization of processes, participates in process documentation creation Proactively manages problem solving, root cause analysis and proposes solution to avoid problems in a future Other duties and responsibilities as assigned by higher management (e.g. official presentations) Manages complex project tasks assigned to him or group of developers, timelines and communication Mentor of junior developers Provides technical trainings for different users, other developers (e.g. SharePoint sites administrators workshops) if required Qualifications YOU WILL SUCCEED IF YOU: have education of Information technologies – Bachelor's degree have experiences with ICT System - 5 years have experiences with programming – Advanced have experiences with HW/SW Overview – Advanced have experiences with General IT Overview – Advanced are communicative, team player and have analytical thinking speak English – Upper intermediate (B2) have advanced knowledge of software development methodology (e.g. Agile, Waterfall), versioning tools, build tools, development environment, bug tracking tools, LDAP protocol, experienced in UML and overview about application servers and databases, middleware advanced experience, custom forms, workflows programming. Additional Information WHY SHOULD YOU CHOOSE US? We believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling work, career growth, private life and individual lifestyle. Therefore we offer to our employees over 25 different benefits to improve their personal and professional life in these areas: Financial benefits Benefits with focus on learning and development Benefits with focus on health and sport Benefits with focus on family and work – life balance Other benefits For more information about our benefits click to Benefits Salary Final salary is negotiable. We are offering base salary depending on seniority level and previous experience of candidate. In addition to base salary we provide variable part and other financial benefits. Base salary will not be lower than 3100€ /brutto. Additional information * Please be informed that our remote working possibility is only available within Slovakia due to European taxation regulation.