Postdoctoral Researcher, Operator Theory and Complex Analysis

Ita-Suomenyliopisto; Finland; On-site; EUR 48,000 - 50,000; Full time

Job summary

The University of Eastern Finland invites applications for a Postdoctoral Researcher position in Operator Theory and Complex Analysis at the Joensuu campus. The appointment is fixed-term for two years starting 1 November 2026 (or as agreed).

The successful candidate will conduct research in spectral theory, numerical ranges, and applications to mathematical physics, publish results, present at conferences, and assist with supervision of PhD and Master’s students (up to 5%).

Qualifications

• Doctoral degree in mathematics or related field.
• Good spoken and written English.
• Strong background in operator theory and complex analysis.

Responsibilities

• Conduct high-quality research in operator theory and complex analysis, including manuscript preparation.
• Produce high-quality publications and report research outcomes.
• Present research at conferences and other academic events.
• Contribute to teaching activities and supervise PhD and Master’s students (up to 5%).

Skills

Operator theory

Complex analysis

English proficiency

Quantum physics

Education

Doctoral degree in mathematics or related field

Job description

The Faculty of Science, Forestry and Technology, Department of Physics and Mathematics

Organisation/Company Itä-Suomen yliopisto Department The Faculty of Science, Forestry and Technology, Department of Physics and Mathematics Research Field Mathematics Researcher Profile Recognised Researcher (R2) Application Deadline 1 Oct 2026 - 21:59 (UTC) Country Finland Type of Contract Temporary Job Status Full-time Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

The University of Eastern Finland is inviting applications for a Postdoctoral Researcher position (Operator Theory and Complex Analysis) at the Department of Physics and Mathematics on the Joensuu campus. The position will be filled for a fixed term of two years as from 1 November 2026 (or starting date as agreed).

Please find more information below and submit your application no later than 1 October 2026.

Role and salary

We are seeking a highly motivated and talented Postdoctoral Researcherto work full-time in the field of Operator Theory and Complex Analysis. The Postdoctoral Researcher will conduct research as part of the Research Council of Finland project “Spectral and Asymptotic Analysis of Structured Matrices and Operators.” The project focuses on the spectral theory and asymptotic analysis of structured matrices and operators, Crouzeix theory and numerical ranges, as well as applications to mathematical physics and random matrix theory.

As our new Postdoctoral Researcher, your main responsibilities will include:

• conducting high-quality research in the field of Operator Theory and Complex Analysis, and related scholarly activities, including the preparation of manuscripts for publication
• producing high-quality scientific publications and reporting research outcomes
• presenting research at conferences and other academic events
• contributing to teaching activities and the supervision of PhD and Master’s students (up to 5% of the position)

The position will be filled for a fixed term of two years as from 1 November 2026 (or starting date as agreed)due to the position pertaining to a specific project task. A trial period is applied to all new members of the staff.

The salary of the position is determined in accordance with the salary system for Finnish universities. The salary comprises two components: a job-related salary element and a personal salary element. For a Postdoctoral Researcher, the job-related salary element is based on level 5 of the job requirement level chart for teaching and research staff. The personal salary element is 6–50% of the job-related salary element. At the beginning of the employment, the total salary will be approximatelyEUR 3,985 – 4,190 /month.

Our requirements and expectations

Requirements

• a doctoral degree, e.g., in mathematics or another relevant field. The doctoral degree may not have been completed more than five years ago at the time of accepting the position (a net period of time, which does not include parental leave, military service, etc.)
• good skills in spoken and written English
• a strong background in concrete operator theory, complex analysis, and quantum physics, as demonstrated through their publications and an interview.

Please note that the applicant must fulfil the stated requirements by the end of the application period.

The following will be considered an advantage

• a strong research background in Toeplitz and related operators, Riemann–Hilbert problems, numerical ranges, and their applications to mathematical physics and random matrix theory.

You will have access to the university’s staff benefits, including

• the opportunity for flexible multi-location work
• excellent opportunities for professional development and continuous learning
• extensive occupational health care
• a broad selection of staff training
• staff discount on lunch in our campus restaurants, as well as on a range of other services

You will have an opportunity to work in a meaningful role as part of our international, creative, participatory and inclusive academic community.

Enjoy your life in Finland! Known for its cleanliness, welfare know-how, modern technology and superb education system, Finland is an exotic and safe country to work in. Please visit the Life in Finland section on our website to learn more.

Questions?

For further information on the positions, please contact Professor Jani Virtanen, email: [e-mail] , tel. [phone].