Master's/PhD Fellow – Researcher in Integrated Modeling and Optimization

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🕒 June 26

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Sistema Fibra

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 1972

🤝 B2B

🤝 Non-profit

📚 Education

B2B • Non-profit • Education

Sistema Fibra is a civic organization based in Brasília that focuses on enhancing the competitiveness of industries and entrepreneurship through representation and support. It brings together various entities, including Sesi, Senai, and IEL, to promote industrial growth and workforce development in Brazil.

📋 Description

• 12-month project to unify Treasury, Cash Shipments and ATM models into a single MIP solution • Assessment of the three models (variables, constraints, interfaces) and historical analysis of instability and misalignments • Unified MIP formulation with coupling constraints between layers • Testing decomposition methods (Benders, Lagrangian, Dantzig–Wolfe) on progressively larger instances • Warm-start heuristics (relax-and-fix, fix-and-optimize) to accelerate the solver • Integration of the data pipeline, execution on geographic slices and scaling to national level • Backtesting with 3 months of real data, comparing against baselines and evaluating cost, stability, adherence and runtime • Delivery of a functional prototype, technical documentation and recommendations for gradual deployment.

🎯 Requirements

• PhD or Master's degree • Education: enrolled or completed • Fields: Computer Engineering, Computer Science, Electronic Engineering, Applied Mathematics or Statistics • Mathematical modeling techniques using Operations Research (linear programming, mixed-integer programming, heuristics, etc.) • Experience using solvers (CPLEX, Gurobi, CBC, HiGHS, etc.) • Python programming • Desirable: Optimization software (FICO Xpress, AIMMS, among others) • Programming languages R, SQL / AWS Cloud / Agile methodology (Scrum) • Experience with end-to-end projects.