Postdoctoral Researcher, Operator Theory and Complex Analysis

University of Eastern Finland; Joensuu; On-site; EUR 44,000 - 47,000; Full time

Benefits offered by this job

Flexible multi-location work

Professional development

Extensive occupational health care

Staff training

Lunch discounts

Job summary

The University of Eastern Finland invites applications for a Postdoctoral Researcher in Operator Theory and Complex Analysis at the Joensuu campus. The two-year fixed-term position starts around 1 November 2026, with a closing date for applications on 1 October 2026.

The role centers on spectral theory, Crouzeix theory, and numerical ranges within a Finnish university project. Responsibilities include research, publications, conference talks, and supervising PhD/Master’s students up to 5%.

Qualifications

• A doctoral degree in mathematics or a closely related field.
• Good skills in spoken and written English.
• Strong background in operator theory, complex analysis, and quantum physics demonstrated through publications and interview.

Responsibilities

• Conduct high-quality research in Operator Theory and Complex Analysis.
• Produce high-quality publications and report research outcomes.
• Present research at conferences and academic events.
• Contribute to teaching activities and supervise PhD and Master’s students (up to 5%).

Skills

Operator theory

Complex analysis

Quantum physics

English proficiency

Education

Doctoral degree

Job description

Postdoctoral Researcher, Operator Theory and Complex Analysis

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

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 theLife 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].

The Faculty of Science, Forestry and Technology operates on the Kuopio and Joensuu campuses of the University of Eastern Finland. The mission of the faculty is to carry out internationally recognised scientific research and to offer research-education in the fields of natural sciences, forestry and technology. The faculty invests in all of the strategic research areas of the university. The faculty’s environments for research and learning are international, modern and multidisciplinary. The faculty has approximately 2,650 Bachelor’s and Master’s degree students and some 440 postgraduate students. The number of staff amounts to 650.

The University of Eastern Finland (UEF) is the most multidisciplinary university in Finland. Our university employs approximately 3,200 employees, and our community includes approximately 17,000 degree students and 16,000 adult education students. Our campuses are located in Joensuu and Kuopio. We represent the world’s cutting edge of research in many fields and produce research-based knowledge, which is made openly available to benefit everyone.Learn more about our university at www.uef.fi/en .Read also about UEF as a working community and employer and the career stories of our employees .

Type of employment

Type of employment Temporary position

Contract type

Contract type Full time

First day of employment

First day of employment 1 November 2026 (or as agreed)

Salary Collective agreement for universities

Number of positions

Number of positions 1

Full-time equivalent 100%

City

County

Country

Country Finland

Reference number

Reference number 1125/01.01.03/2026

Contact

• Jani Virtanen, Professor, [phone], [e-mail]