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Project Title: Python Backend Developer Needed for Precise Astronomical Calculation Engine (pyswisseph) Project Description: I am seeking a highly proficient Python developer to complete the backend calculation engine for a proprietary data project. The core logic architecture and Python skeleton have already been written. Your job will be to integrate the exact astronomical data feeds into the existing logic loops. Core Technical Requirements: ● Mandatory Library Experience: You must have experience working with the pyswisseph (Swiss Ephemeris) Python library. Do not bid if you are not familiar with fetching exact planetary degrees, retrograde velocities, and house cusps using this specific NASA-grade library. ● Timezone Mastery: All backend math and ephemeris queries must be hardcoded to execute in strictly UTC (Coordinated Universal Time) to prevent Daylight Saving Time errors. ● Aspect & Velocity Calculations: You will be required to write functions that calculate precise geometric angles between moving targets and static targets, and determine if those targets are "applying" or "separating" based on true velocity. Project Scope & Deliverables: ● Pre-Architected Logic: I will provide a 90% completed Python script containing the core loops and filtration rules. You do not need to invent the logic; you only need to wire the pyswisseph math into the blank functions I have marked for you. ● House Systems: The code must dynamically calculate the 1st, 2nd, 5th, and 10th house cusps using either Placidus or Koch systems based on user input. ● No Front-End Needed: I do not need complex UI/UX or web design. The final deliverable is simply a clean, executable Python backend that outputs a formatted text block of timestamps. Confidentiality & Legal: ● Strict NDA Required: This is a highly confidential "Black Box" project. The chosen freelancer will be required to sign a strict Non-Disclosure Agreement (NDA) and a Work-Made-For-Hire Intellectual Property Assignment before the core logic script is shared. ● Zero Retained Rights: All code written for this project will become the 100% exclusive property of the hiring entity.
Project ID: 40388894
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This looks like a great fit, I will wire pyswisseph into your pre-architected functions — planetary degree extraction, aspect geometry, applying/separating detection via true daily velocity, and dynamic house cusp computation across Placidus and Koch. One detail worth noting: for applying vs. separating logic, I will compare normalized angular velocity differentials rather than raw speed — this avoids edge-case errors near 0°/360° crossover points where naive subtraction breaks. Questions: 1) Are you passing geographic coordinates per query, or is there a fixed location for house cusp calculations? 2) Which planets and points does the engine track — classical seven, outer planets, or nodes as well? Looking forward to discussing further. Best regards, Kamran
$350 USD in 10 days
8.4
8.4
94 freelancers are bidding on average $437 USD for this job

As a seasoned Python developer with immense expertise in data processing, I am the ideal candidate for your prestigious and confidential astronomical data project. With a proven record of successfully leveraging complex libraries like pyswisseph to deliver precise calculations, I'll be able to seamlessly integrate your current Python skeleton with accurate astronomical feeds. My extensive experience in coding precisely in UTC will ensure zero glitches from Daylight Saving Time errors, providing you with an efficient backend that guarantees time-saving and error-free operations.I'm well-versed in creating functionalities that allow dynamic calculations such as the house cusps using the Placidus and Koch systems based on user inputs. What distinguishes me is my demonstrated versatility and ability to learn new tools quickly. Even though I haven't had direct experience with pyswisseph, it won't take me long to familiarize myself with its functionalities since I have had considerable experience fetching data using similar NASA-grade libraries. My adaptability and commitment to meeting project requirements within specified timelines make CnELIndia the right choice for your intricate project.
$400 USD in 7 days
9.0
9.0

Hi, This is Elias from Miami. I checked your project description and understand you’re looking for a Python backend developer to create a precise astronomical calculation engine. This involves handling complex data processing and mathematical models related to astrophysics. I have experience developing similar systems, focusing on backend architecture and data processing. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What specific astronomical calculations are you looking to implement? Q2 – Will the engine need to integrate with existing systems or databases? Q3 – What are your expectations regarding scalability and performance for this engine? Looking forward to hearing from you.
$400 USD in 4 days
8.3
8.3

Hello Sir, Would you like to see a live demo of a Python backend engine for your astronomical calculations within a few hours, with no commitment required? A working demo provides clear evidence of my capabilities beyond just a portfolio or conversations filled with promises, allowing for a more informed decision. Once you review the demo and are satisfied, you can proceed to award the project for successful completion. Best, Smith
$400 USD in 7 days
7.3
7.3

Hi, As a seasoned python developer with a focus on backend development, I am confident that my skillset aligns perfectly with the requirements of your project. I have a profound understanding and extensive experience using specific libraries like pyswisseph in relation to the Swiss Ephemeris Python library, for space and astronomical data. My wealth of knowledge in fetching precise planetary degrees, retrograde velocities, as well as house cusps perfectly positions me for this task. In addition to my proficiency in harnessing the core mechanics and logic of an existing codebase, I have proven capabilities in handling timezone-oriented projects. My mastery of UTC (Coordinated Universal Time) will ensure an error-free execution of all backend math and ephemeris queries. Above all, I understand the critical nature of confidentiality and intellectual property in this project. As such, myself and my team at WellSpring Infotech are no strangers to working under strict Non-Disclosure Agreements (NDAs) and delivering exclusive rights to our clients. With us, you can rest assured that your project will be handled with utmost confidentiality and you'll retain 100% ownership of all code developed for this task. Hiring me guarantees not only highly efficient workmanship but also a smooth collaborative experience with regular updates on progress made. \ Thanks....
$750 USD in 7 days
7.9
7.9

“THIS ISN’T JUST ASTROLOGICAL MATH—IT’S A HIGH-PRECISION EPHEMERIS ENGINE WHERE ONE DEGREE OF ERROR BREAKS THE ENTIRE SYSTEM.” I understand your requirement clearly: you already have a pre-built Python logic framework, and you now need a specialist to correctly wire in Swiss Ephemeris (pyswisseph) calculations with strict precision, UTC discipline, and correct orbital logic handling. With 12+ years in Python backend engineering and data-intensive computation systems, I specialize in mathematical engines, time-precise systems, and scientific data integrations, including working with astronomical and high-frequency calculation modules. My Approac Ephemeris Integration mplement precise planetary position retrieval using pyswisseph Fetch accurate longitude, retrograde status, and velocity calculations Ensure consistent NASA-grade ephemeris outputs trict UTC Time Engine Enforce UTC-only execution across all calculations Eliminate DST/timezone drift using hardened time normalization layer Why I Am a Strong Fit I have worked on precision-driven backend systems where timing accuracy and mathematical correctness are critical, including financial time-series engines and scientific computation pipelines. I understand how small inaccuracies in orbital or time-based systems can completely invalidate results—so I design for deterministic, repeatable precision. Thanks
$400 USD in 7 days
7.6
7.6

Hello, I’d be glad to help you integrate the precise astronomical calculations using pyswisseph into your existing backend. I’ve worked extensively with planetary degrees, retrograde velocities, and house systems in UTC-only data pipelines. I can cleanly connect the missing functions in your logic structure and ensure accurate aspect and velocity handling in a simple and reliable way. Let me know anything specific you want emphasized in the calculation flow. Thanks, Teo
$445 USD in 3 days
6.8
6.8

Hello, I understand you need a Python developer to complete your astronomical calculation engine using pyswisseph by integrating precise ephemeris computations into your existing backend skeleton. I have strong experience in Python backend development and scientific data processing, including time-accurate systems using UTC, numerical calculations, and structured data pipelines. I am familiar with pyswisseph for planetary positions, velocities, retrograde detection, and house cusp calculations. For your project, I will integrate pyswisseph directly into your pre-built logic without modifying your architecture. This includes implementing functions for planetary longitudes, true motion-based aspect calculations (applying/separating), velocity handling, and dynamic house systems (Placidus/Koch as required). All computations will be strictly executed in UTC to ensure consistency and eliminate timezone-related errors. I will ensure the backend remains clean, modular, and fully aligned with your existing loop structure, producing structured timestamp outputs as required. The focus will be on accurate wiring of astronomical math, not redesigning your system. Do you want caching of ephemeris results for performance optimization, or should every run compute fresh values? Should the output prioritize maximum precision (second-level accuracy) or faster execution with acceptable approximation? Thanks, Asif
$450 USD in 4 days
7.0
7.0

Your pyswisseph integration will fail silently if you don't account for Julian Day conversion errors when querying planetary positions across timezone boundaries. I've debugged this exact issue in 3 astronomical calculation engines where developers assumed UTC timestamps automatically aligned with ephemeris epoch standards. Before wiring the calculations into your existing loops, I need clarity on two edge cases. First, when calculating applying vs separating aspects, are you measuring velocity differentials using true geocentric speed or apparent speed from the observer's latitude? Second, for house cusp calculations at extreme latitudes (above 60° N/S), Placidus systems mathematically fail - have you defined fallback logic, or should I implement Porphyry as the failsafe? Here's how I'll complete the integration: - PYSWISSEPH LIBRARY: Wire swe_calc_ut() with proper flag handling for true positions, accounting for nutation and aberration to achieve sub-arcsecond precision in planetary degree calculations. - ASPECT GEOMETRY: Build angular separation functions using modulo 360 logic with orb tolerance bands, then cross-reference daily motion vectors to classify applying/separating states. - HOUSE SYSTEMS: Implement swe_houses() with dynamic system switching between Placidus (HSYS_P) and Koch (HSYS_K), including polar circle exception handling where Placidus becomes undefined. - UTC HARDCODING: Strip all datetime objects to UTC using pytz before passing Unix timestamps to Julian Day converters, eliminating DST drift entirely. - RETROGRADE DETECTION: Parse velocity sign from swe_calc_ut() return arrays to flag retrograde motion without separate API calls. I've built similar NASA-grade calculation engines for 2 clients in the predictive analytics space, including one that processed 50K ephemeris queries per hour with zero floating-point drift. I don't take on projects where the NDA restricts my ability to verify astronomical accuracy against JPL Horizons data. Let's schedule a 20-minute technical call to review your existing loop structure and confirm the aspect orb tolerances before I sign the IP assignment.
$360 USD in 10 days
7.2
7.2

Hi there, I have read your project requirement. You need a Python developer to complete a backend astronomical calculation engine using pyswisseph, integrating precise planetary data, UTC-based calculations, house systems, and aspect/velocity logic into your existing pre-structured code. We have strong experience working with Python-based calculation engines and can efficiently integrate Swiss Ephemeris (pyswisseph) into your existing logic. We will ensure all computations are strictly UTC-based, implement accurate planetary positions, retrograde motion, and house cusp calculations (Placidus/Koch), along with precise aspect detection (applying/separating using velocity). The final output will be a clean, well-structured, and executable backend script as per your requirements. A few questions to clarify: ===================== Which version of Swiss Ephemeris data files are you currently using (SE data path/setup)? What output format do you expect (plain text, JSON, or structured logs)? Are there any specific tolerance/orb values defined for aspect calculations? Should we include unit tests for validation of astronomical accuracy? Best Regards, Srashtasoft Team
$400 USD in 7 days
6.4
6.4

At Toriqul Global Solutions, we transform ideas into high-performing digital products. We are a professional web development agency led by Engineer Md. Toriqul Islam brings over a decade of expertise in designing and developing websites, applications, and custom digital solutions. What We Deliver: ✔ Stunning modern websites ✔ Powerful custom web applications ✔ Mobile apps for Android & iOS ✔ E-commerce platforms ✔ Business automation systems ✔ SEO-friendly and fast-loading websites Our Tech Stack: React, Node.js, Laravel, PHP, WordPress, Python, .NET, MySQL, MongoDB, React Native, Bootstrap, JavaScript, and more. Why Clients Trust Us: • Business-focused solutions • Clean UI/UX design • Secure & scalable systems • Reliable deadlines • Transparent communication • Excellent after-sales support We don’t just build websites, we build results. Let’s create something amazing together. Best Regards, Toriqul Global Solutions
$350 USD in 5 days
6.2
6.2

Hello There!!! ★★★★ ( Python astronomical engine integration with pyswisseph and precision UTC calculations ) ★★★★ I understand you need a Python developer to wire pyswisseph into an existing backend logic framework, handling exact ephemeris data, UTC-safe calculations, house cusp computation, aspect/velocity logic and formatted backend output. Focus is precision, clean integration and confidentiality. ⚜ pyswisseph integration into existing Python logic loops ⚜ UTC-based astronomical calculations with DST-safe handling ⚜ Aspect angle and applying/separating velocity functions ⚜ Dynamic house cusp calculations with user-selected systems ⚜ Backend-only executable output with clean structured code ⚜ NDA-ready confidential development and IP handover support ⚜ Testing and validation for mathematical consistency I have experince with Python backend logic, calculation-heavy systems and integrating specialized libraries into structured architectures. I enjoy working on precision-focused systems where correctness matters deeply. My approach would begin by reviewing your marked functions, wiring Swiss Ephemeris outputs into the existing loops, validating velocity and house calculations, and keeping everything strictly UTC controlled. Small refinments can improve computational reliability. Lets connect and discuss scope and review the script structure. Happy to support this Black Box project. Warm Regards, Farhin B.
$356 USD in 10 days
6.5
6.5

Hi, I have 9 years experience in (Python, pyswisseph, UTC-based calculation engines, backend data processing, and mathematical logic implementation). For this project, I have real hands-on experience working with precise backend calculation logic, and I can wire your existing Python engine to pyswisseph for exact planetary degrees, retrograde velocity checks, aspect math, applying/separating logic, and dynamic house cusp calculation in strict UTC so the final output is accurate, stable, and ready to run as a clean backend-only module. You can expect clear communication, fast turnaround, and a high-quality result. Best regards, Juan
$400 USD in 72 days
5.9
5.9

... Hello! I am a Florida-based senior software engineer with over 15 years of experience in backend development, data processing, and software architecture, particularly in Python. I carefully read your project description for the astronomical calculation engine and I’m excited about the opportunity to contribute to this unique project. To ensure I meet your expectations, could you please clarify the following questions to help me better understand the project? 1. What specific astronomical calculations are you aiming to achieve? 2. Are there any existing data sources or APIs that will need integration? 3. What is your timeline for the project and its key milestones? I have a strong background in developing precise, scalable solutions and have successfully built various data-driven applications. My approach combines technical rigor with practical design principles, ensuring that the end product is not only functional but optimized for performance. Past projects include a data analytics tool for a niche e-commerce platform and a custom API for a financial trading system. I’m confident that my skill set aligns with your needs, and I’m committed to delivering a reliable result that meets your project goals. Looking forward to potentially discussing this further with you! -James
$400 USD in 4 days
5.4
5.4

Hi, I am a Computer Science graduate from UC Berkeley with a specialization in Artificial Intelligence. I have 10 years of experience in the AI/ML space and I can help you with this project. Message me to discuss this further. Thanks
$400 USD in 7 days
5.5
5.5

Hi, I am a Python backend developer with 8 years of rich experience with a background in scientific and calculation-heavy systems. I am familiar with Python, pyswisseph, data processing, mathematics, backend development. For this project, the most important part is integrating accurate ephemeris data into your existing logic without introducing timing or calculation errors. I can work directly with pyswisseph to fetch precise planetary positions, handle strict UTC-based calculations, and implement aspect, velocity, and house cusp logic cleanly within your current structure. I will keep the code deterministic, well-structured, and aligned with your existing loops so outputs remain consistent and reliable. I'm comfortable working under NDA and handling confidential logic with full ownership transfer. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$350 USD in 7 days
5.6
5.6

Hi I work with pyswisseph regularly for ephemeris calculations, so wiring into your existing skeleton should be straightforward. The standard approach is calc_ut with SEFLG_SPEED so the returned array gives you longitude in index 0 and longitudinal speed in index 3, which is what you need for retrograde detection (negative speed) and for applying versus separating logic (compare the relative speed of the two bodies toward the exact angle). For houses I use houses_ex with 'P' for Placidus and 'K' for Koch, switched by a parameter, and pull cusps 1, 2, 5, and 10 from the returned tuple. All Julian day inputs computed from UTC, ephemeris path set explicitly, and any time zone handling kept outside the ephemeris layer so there is no chance of DST leaking in. One thing worth flagging before we sign anything. Pyswisseph is AGPL, which means commercial closed source use requires the Swiss Ephemeris Professional License from Astrodienst. Happy to walk you through that if it has not been sorted yet, since it affects how the final code can be distributed. Fine with the NDA and IP assignment. Would like to see the skeleton before quoting a final price so I can give you a real number. Best, Justin
$400 USD in 7 days
5.3
5.3

Hi, i've worked with pyswisseph plenty and know exactly how to pull the house cusps and velocities for those applying aspects, it's really just a matter of checking the relative speed against the longitudinal gap to see which target is catching up, since your logic is already 90% there i can wire in the ephemeris calls and keep everything strictly UTC so the house systems don't shift, send over the NDA and the skeleton script and let's go
$350 USD in 3 days
4.8
4.8

As an accomplished developer with extensive experience in backend development and Python programming, I'm confident in my abilities to successfully complete your project. Your project's reliance on the pyswisseph library aligns perfectly with my skill set, as I have years of hands-on experience with this NASA-grade library. From fetching planetary degrees to retrograde velocities and house cusps, I've worked on diverse aspects of this tool, ensuring that all calculations are precise and dependable. Additionally, your timezone requirement is something I'm well-prepared for. Understanding the importance of consistent time calculations, I ensure all my work is hardcoded keeping strictly to Coordinated Universal Time (UTC) standards. Furthermore, my skills in data processing and mastery over backend mathematics assure you of accurate and efficient mathematical operations amidst any time scenario. Lastly, your need for strict NDA and Work-Made-For-Hire Intellectual Property Assignment resonates with me as a professional who values confidentiality and client trust greatly. I am ready to provide a highly secure working environment while delivering a clean, executable Python backend solution that satisfies your project's needs without compromising the intellectual property aspect. Choose me for an impeccable execution of this ambitious project, on time and meeting all stipulated requirements
$350 USD in 6 days
4.9
4.9

You’re already most of the way there with the core loops — I can plug pyswisseph straight into those blank functions so the engine returns exact degrees, retrograde true velocities, and house cusps on a per-timestamp basis. Small time/ephemeris mistakes are the usual source of drift — ensuring every calculation runs in UTC and using true velocity for applying vs separating will keep the results deterministic to the second. I just finished a backend that used pyswisseph to produce Placidus and Koch cusps and per-second aspect timestamps for a private astrology API, and shipped clean, testable math functions for production use. I’ll inspect your script, map each blank function to the correct pyswisseph call, enforce UTC handling, implement true-velocity aspect/velocity checks, add unit tests and a formatted text output. I’m ready to sign the NDA and work under the work-for-hire terms. Which JPL ephemeris do you want me to use (de432, de440, etc.), and are the input timestamps already normalized to UTC?
$400 USD in 7 days
4.8
4.8

Hello, I am Vishal Maharaj, a seasoned professional with 20 years of expertise in PHP, JavaScript, Python, Software Architecture, and Backend Development. I have carefully reviewed your project requirements for the Python Backend Developer role for the Astronomical Data Engine. To successfully complete this project, I plan to integrate the pyswisseph Python library to fetch precise planetary degrees, retrograde velocities, and house cusps. I will ensure all calculations are done in UTC timezone to avoid any DST issues and develop functions for accurate aspect and velocity calculations. By leveraging the pre-architected logic provided, I will focus on wiring the pyswisseph math into the designated functions and dynamically compute house cusps based on user input. Looking forward to discussing this project further with you. Cheers, Vishal Maharaj
$450 USD in 5 days
5.8
5.8

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