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Python Engineer (Computational Astronomy / Jyotish Verification)

15 hours, 13 minutes ago
India
Contract
Mid Level
Backend Engineer
Software Development
Jupyter Python
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Gramian Consultancy Group

Gramian Consultancy Group

Professional Services
View All Jobs 11

Description

  • Write Python scripts using high-precision astronomical libraries to compute and verify planetary longitudes for any given date, time, and location.
  • Implement Nirayana (sidereal) longitude calculations by applying specified Ayanamsa systems (e.g., Lahiri, Krishnamurti, Raman).
  • Compute Ascendant (Lagna) degrees and implement house cusp calculations using systems such as Equal, Placidus, Koch, or Whole Sign.
  • Determine Nakshatra and Pada from computed planetary longitudes and compute Panchang elements including Tithi, Nakshatra, Yoga, and Karana.
  • Calculate sunrise and sunset times for specified coordinates and dates.
  • Build automated verification harnesses and pipelines to validate batches of Kundali computation problems against ephemeris-derived ground truth and allow non-technical spot-checking.
  • Generate 10–15 code-verified evaluation problems per month with algorithmically produced ground-truth outputs.
  • Document discrepancies between different ephemeris sources and Ayanamsa systems, including quantified error margins, and maintain reproducible documentation and annotated notebooks.
  • Translate traditional Jyotish calculation approaches into reproducible computational logic and identify edge cases in astronomical calculations, coordinate transformations, and sidereal conversions.
  • Collaborate with domain experts and scholars to formalize calculation rules and validate implementation accuracy.

Requirements

  • Minimum 3 years of professional Python development experience.
  • Bachelor's or Master's degree in Computer Science, Software Engineering, Physics, Astronomy, or Mathematics.
  • Proven proficiency with at least one astronomical computation library: pyswisseph (including familiarity with functions like swe_calc_ut(), swe_houses(), swe_set_sid_mode()) or Skyfield (including loading ephemeris files such as de421.bsp, computing planetary positions, coordinate transforms, and time scale handling like UT1/TDB/TT).
  • Understanding of the conceptual difference between Sayana (tropical) and Nirayana (sidereal) coordinate systems and how Ayanamsa bridges them.
  • Familiarity with astronomical time systems (UT, UTC, IST, Julian Date) and coordinate systems (ecliptic longitude/latitude, right ascension/declination).
  • Comfort debugging ephemeris library calls and quantifying discrepancies between ephemeris sources and calculation methods.
  • Familiarity with house systems and related algorithms (Equal, Placidus, Koch, Whole Sign) is required or strongly preferred.
  • Interest in or working knowledge of Vedic Astrology (Jyotish) and traditional sidereal calculation systems.
  • Ability to produce algorithmically verified evaluation problems and maintain clear, reproducible documentation and annotated notebooks.
  • Availability to work 8 hours per day with a required 4-hour overlap with Pacific Standard Time (PST); contractor assignment for 6–8 weeks based in India (no medical/paid leave).

Interested in this position?

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