Sistema Fibra logo
Sistema Fibra

Pelo Futuro da Indústria | Pelo Futuro do Trabalho

Master/PhD Fellow – Researcher in Integrated Modeling and Optimization

Research ScientistResearch ScientistFull TimeRemoteSeniorTeam 1,001-5,000Since 1972H1B No SponsorCompany SiteLinkedIn

Location

Brazil

Posted

2 days ago

Salary

R$11K / month

Seniority

Senior

Postgraduate DegreePortugueseAWSCloudPythonSQL

Job Description

Master/PhD Fellow – Researcher in Integrated Modeling and Optimization

Sistema Fibra

• 12-month project to unify Treasury, 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 across layers • Testing decompositions (Benders, Lagrangian, Dantzig–Wolfe) on increasing instance sizes • Warm-start heuristics (relax-and-fix, fix-and-optimize) to accelerate the solver • Integration of the data pipeline, execution on geographic segments 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 phased deployment

Job Requirements

  • PhD or Master’s degree
  • Currently enrolled in or graduated in 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.)
  • Programming in Python
  • Desirable: Optimization software (FICO Xpress, AIMMS, others), R, SQL, AWS Cloud, Agile methodology (Scrum), experience with end-to-end projects

Benefits

  • Stipend: Master’s BRL 9,000; PhD BRL 11,000
  • Availability: 40 hours per week

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