Web Developer for EV Energy Optimization App -- 2

@divumanocha

Hello, I am an individual freelancer with strong experience in JavaScript/TypeScript full-stack development and energy systems modeling, including EV charging, PV integration, and optimization. I have successfully translated complex Excel-based simulation models into web applications, preserving numerical accuracy and alignment with original KPIs. Experience with Excel-based models: I have worked on several energy and financial simulations, reverse-engineering Excel workbooks to extract inputs, intermediate calculations, and outputs. I ensure deterministic, reproducible results and document all variable mappings clearly for maintainability. Approach to translating Excel logic into code: Model Interpretation: I will parse the Excel model to identify true inputs, derived states, KPIs, and optimization constraints. Code Integration: I structure code into input, derived, and output layers, implementing all calculations with high numerical fidelity. Solver Implementation: I will integrate a deterministic solver (e.g., linear/non-linear optimization) that handles EV charging, bidirectional flows, PV sizing, and grid interaction. Fixed price: $4000, milestone-based delivery with checkpoints for model validation and chart accuracy. I can start immediately and work closely with you to ensure that the application becomes the primary calculation and optimization tool, faithful to your Excel reference. Looking forward to collaborating. Best regards,

@Webtechfusion23

Hi Tom V., ➡️ I read your project description for the EV Charging & Energy Optimization Web Application. You need a developer to integrate an Excel model into an existing application to enhance its calculation capabilities and optimize energy management. ⏺️ I specialize in developing complex web applications with a focus on integrating detailed Excel models into dynamic web interfaces. With extensive experience in JavaScript/TypeScript and a solid background in energy systems and EV charging, I can ensure high numerical accuracy and the effective translation of your Excel logic into the application. My approach includes a meticulous analysis of the Excel model, coding precise calculations, and implementing optimization logic for energy cost, EV efficiency, and solar utilization. Regards, Aftab Ahmad Full Stack Developer (12 Years of experience)

@Herculesz

Hi I’m an individual freelancer (not an agency) and can reverse-engineer your XLSX reference model and reproduce it in deterministic TypeScript with tight numerical parity. The main technical risk is hidden Excel behavior—implicit assumptions, circular dependencies, lookup edge-cases, and goal-seek style optimization—that can cause drift between spreadsheet and code. I’ll decompose the workbook into a documented calculation graph: true inputs, intermediate states, final KPIs, and time-series outputs, with a clear variable mapping to your app. I’ll implement the logic as a pure, testable compute core (input → derived → output) using exact rounding/precision rules and automated regression tests against Excel snapshots. For the solver, I’ll build a deterministic optimizer (grid search / constrained local search) over variables like bidirectional share, charging windows, PV sizing, and feed-in vs self-consumption to support multi-objective weighting. Charts will be aligned by replicating the Excel time-step semantics (profiles, ratios, percentages) so every plotted series matches the reference outputs. You’ll get clean, well-commented code, reproducible test fixtures, and a concise mapping document so the web app becomes the single source of truth. Thanks, Hercules

@Rapha

Hi, I’m Rafa, a full-stack freelance developer (not an agency) with hands-on experience translating complex Excel-based models into deterministic, maintainable code — especially in energy systems, EV charging, and optimization logic. I confirm I work independently. I’ve previously reverse-engineered Excel tools covering PV sizing, bidirectional EV flows, and time-based cost simulations. My process starts with a full audit of the XLSX file: identifying inputs, derived calculations, KPIs, and any implicit constraints or solver logic. I’ll replicate the entire structure in code (TypeScript or Python-based backend), modularized into input handling, computation layer, and clean outputs. Solver logic will be deterministic, targeting cost, EV usage, and self-consumption goals, and integrated with your current charting/dashboard components. Charts will match Excel’s time structure and calculations with tight tolerance validation. Estimated timeline: 3–4 weeks total Fixed price: €3000 (divided into clear milestones: model mapping, logic rebuild, solver + charts) Deliverables include clean code, mapping documentation, and full test validation. Let’s align on specifics so I can deliver a robust and accurate integration.

@corpmember29

I am an individual freelancer, not an agency, with experience translating complex Excel-based energy and financial models into production-ready web applications. I have worked on projects involving EV charging, PV systems, and energy optimization with high numerical accuracy. Approach to Excel Logic Translation: Model Analysis: I will thoroughly reverse-engineer your Excel model, identifying inputs, derived calculations, KPIs, and optimization logic. A clear mapping document will be produced for verification. Code Integration: I will implement the calculation engine in JavaScript/TypeScript with a structured architecture: input layer → derived state → output layer. Results will match Excel outputs within tight tolerance. Optimization & Solver: Implement a deterministic solver for cost minimization, EV km maximization, solar self-consumption, and other objectives. Solver outputs will automatically update charts and KPIs. Charts & Profiles: All web-based charts will mirror Excel time-series logic (consumption, production, grid usage, EV charging), ensuring visual and numerical alignment. Technical Stack: TypeScript for deterministic, clean, maintainable code; web interface integration for charts and user inputs; optional numeric libraries for solver efficiency. Deliverables: Fully integrated web calculation engine matching Excel model Automated charts reflecting solver results Documented code and mapping between Excel and web variable

@codefusion53

Hi, I am an individual freelancer with extensive experience translating complex Excel models into high-accuracy web applications. I can analyze your existing Excel energy and EV charging model, identify inputs, intermediate calculations, KPIs, and optimization logic, and faithfully integrate it into your application. I will implement a deterministic solver to optimize energy costs, EV km, and solar self-consumption, ensuring outputs and charts align with the Excel reference. My code will be clean, well-documented, and structured with input, derived, and output layers. I will verify results against Excel with tight numerical tolerance. I have experience in JavaScript/TypeScript, frontend and full-stack development, and energy system modeling. I can deliver a production-ready integration according to agreed milestones, with high quality prioritized over speed, and am open to long-term collaboration. Best, Justin

@justinw45

Hello Client, thanks for considering my proposal. I have carefully reviewed your project requirements for the EV Energy Optimization Web Application and I am confident in my ability to meet your needs. I understand the importance of faithfully integrating the complex Excel model logic into the web application to optimize energy efficiency and EV charging. With my expertise in JavaScript and experience in reverse-engineering complex Excel models, I am well-equipped to tackle this project effectively. I am committed to delivering clean, well-documented, and deterministic code that aligns with your project goals. I plan to approach this project by thoroughly analyzing the Excel model, documenting the mapping between Excel and application variables, and reproducing all calculations with high numerical accuracy. I will focus on integrating the optimization logic and implementing a deterministic solver to meet the specified objectives. Throughout the project, I will ensure clear communication and collaboration to achieve the desired outcomes. I am excited about the opportunity to work on this project and potentially establish a long-term collaboration with your company. Best regards, Justin

@PMPMPM1985

Hello, I've reviewed your requirements for the EV energy optimization app. I understand you need the Excel model's logic integrated into the web application, focusing on accurate calculations and optimization. My skills in JavaScript/TypeScript and experience with complex Excel models align well with your needs. I can analyze the Excel model, translate its logic into code, implement the solver, and align the charts. I am an individual freelancer. I'm confident I can deliver high-quality results. Regards, Parvesh M.

@phpxpert89

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on JavaScript, Web Development, Excel VBA, Full Stack Development, Frontend Development, Data Visualization, Excel VB Capabilities, Data Analysis, Software Engineering, Web Application Please come over chat and discuss your requirement in a detailed way. Thank You

@mobiwebsolutions

Hi There!!! The Goal of the project:- To fully integrate the logic of a complex Excel EV energy optimization model into a web application, ensuring accurate calculations, deterministic optimization, and aligned visual outputs for EV charging, PV usage, and energy cost management. I have carefully read and understood the complete project description and I am confident in translating Excel-based energy and EV models into clean, well-documented JavaScript/TypeScript code. I am the best fit for this project because I specialize in reverse-engineering Excel models and implementing high-accuracy calculation engines for web applications. Three points that directly match your requirements: 1. Analyze and map the Excel model variables, calculations, and KPIs. 2. Implement deterministic solver logic to optimize EV charging, solar self-consumption, and grid usage. 3. Align all charts and outputs with Excel time-series data to match results accurately. I will provide basic services including UI refinement, database management, testing, and full source code delivery, along with clear documentation of the mapping and integration. I have 9+ years experience as a full stack developer and have completed similar projects integrating Excel-based energy and financial models into web platforms. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@jovani81

Hi! I’m an individual full-stack developer with strong JS/TypeScript experience and deep hands-on work translating complex Excel models into production systems. I rebuilt a solar + battery optimization tool where the main challenge was reverse-engineering hidden Excel solver logic and matching KPIs exactly; I solved it by isolating inputs, rebuilding time-series flows, and validating outputs within tight tolerances. I’ve reviewed your scope and can faithfully port the EV/energy Excel logic into clean, deterministic code. Thanks...

@maryam951

Hello Tom V., I am Maryam Abbas, a Full Stack Developer with 4 years of experience in JavaScript. I have carefully read the requirements for the EV Energy Optimization App project and I am confident in my ability to deliver a successful solution. To achieve the project goals, I will thoroughly analyze the provided Excel model, integrate its logic into the web application with high numerical accuracy, and implement a deterministic solver for optimization. With my expertise in JavaScript and experience in working with complex Excel models, I am well-equipped to handle the technical requirements of this project. You can review my portfolio https://www.freelancer.pk/u/maryam951 to see my past successful projects. Let's discuss further details in chat. Best regards, Maryam Abbas

@abdf2010

Hello there, I reviewed your project Web Developer for EV Energy Optimization App -- 2 and understood the requirements at a high level. I focus on delivering clear, stable, and maintainable solutions aligned with the actual scope, I can work with JavaScript, Web Development, Excel VBA and follow a clean development process with proper structure and error handling. If this aligns with what you’re looking for, please come to chat to discuss further. Best regards

@mughiraaa

Hello, I have reviewed the details of your project. i will analyze the provided excel model to understand all inputs, intermediate calculations, and key output metrics. each variable in the excel file will be mapped to corresponding code structures, ensuring nothing is overlooked. the calculation engine will be reproduced in javascript/typescript, maintaining high numerical accuracy and deterministic results. the code will be organized into input, derived, and output layers to make logic clear and maintainable. optimization logic will be translated into a solver that considers charging windows, bidirectional ev usage, pv sizing, and grid feed-in, updating outputs and charts automatically. all charts and time-series profiles in the web interface will reflect the excel model, including energy flows, ev charging impact, and ratios. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@dragomira2

Hello Tom, Thank you for the detailed project description. I am an individual freelancer (not an agency) with 10+ years of experience in web application development, including extensive work translating complex Excel models—especially in energy, financial, and simulation domains—into robust, maintainable code. I have previously reverse-engineered Excel-based optimization systems for energy management and EV simulation, ensuring high numerical fidelity and alignment of all KPIs and outputs. Your focus on accurately replicating the Excel logic, including all derived calculations, optimization constraints, and time-series visualizations, resonates with my core strengths. My approach begins with a thorough analysis of your Excel model: mapping every input, intermediate calculation, and output to equivalent application variables, and documenting the logic flow for transparency. I will iteratively implement and validate calculation layers in JavaScript/TypeScript, using comprehensive test cases to ensure results match Excel within strict tolerances. For the solver, I have experience designing deterministic optimization logic (linear/mixed integer) for energy flows and cost minimization, and can integrate this seamlessly with your existing UI and charting components. Each update will be rigorously tested to ensure automatic result alignment and data visualization integrity. You can expect clean, well-documented code and clear communication throughout. I am committed to high-quality delivery and see this as an excellent opportunity for a productive long-term collaboration. Looking forward to discussing the next steps with you. Best regards, Dragomir

@mykhaylob4

✋ Hi there. I can take your existing EV energy optimization web app and fully integrate the Excel calculation engine so the web interface becomes the primary, highly accurate tool for energy, EV, and PV optimization. ✔️ I have strong experience translating complex Excel models into precise JavaScript/TypeScript code, including energy systems, EV charging schedules, bidirectional flows, and PV self-consumption calculations. Previously, I converted multi-sheet simulation models into deterministic web apps with charts, inputs, and KPIs matching the Excel outputs within tight tolerances. ✔️ For your project, I will first analyze the Excel model to identify all inputs, intermediate calculations, and KPIs, documenting the mapping between the spreadsheet and the app. I will then reproduce all calculations in clean, modular code, implement a solver to balance energy cost, EV range, and solar self-consumption, and ensure the output charts update automatically in line with the Excel logic. ✔️ Deliverables include fully functioning web app code with integrated calculations, deterministic solver, aligned charts, clear documentation, and a milestone plan for review. Every value and KPI will match the Excel reference within strict tolerances. Let’s chat so I can review your Excel model and define milestones for a precise, high-quality delivery. Best regards, Mykhaylo

@rbtech1984

Hi There! ⚜⭐⭐⭐⭐⚜(( Extend and finalize a web-based EV charging and energy optimization app Faithfully translate a complex Excel reference model into accurate, deterministic web calculations Implement optimization logic and aligned charts to match Excel KPIs and outputs ))⚜⭐⭐⭐⭐⚜ This project is about making the web app the primary calculation and optimization tool, reproducing all Excel logic with high numerical accuracy while keeping inputs, derived states, and outputs fully aligned. I HAVE SUCCESSFULLY TRANSLATED COMPLEX EXCEL MODELS INTO JAVASCRIPT/TYPECRIPT FOR ENERGY AND FINANCIAL SIMULATIONS AND CAN SHARE SIMILAR WORK IN CHAT. I work as an individual freelancer, reverse-engineering Excel models, implementing deterministic solvers, and ensuring chart outputs match reference profiles. I would love to discuss your model, review its structure, and outline the integration strategy for full accuracy. Warm Regards, Farhin B.

@NazarKanteruk

Hi there! I’m excited by your project and its technical depth. As an independent freelancer experienced in both Excel reverse-engineering and JavaScript/TypeScript, I can ensure a seamless, high-accuracy logic migration from your Excel model to the web application. I’ll break down, meticulously map, and faithfully reproduce every calculation and output, aligning all visualizations with the Excel time-series flow. My process includes documenting variable mapping, implementing deterministic solver logic for your KPIs, and delivering clean, maintainable code. Let’s collaborate for reliable results—and potentially a long-term success story. Looking forward to outlining clear milestones and providing you with a detailed approach and timeline!

@Alesha1018

Hi, how are you doing? I’m excited to help turn your Excel-based EV charging and energy optimization model into a fully functional web application. I have experience reverse-engineering complex Excel models, translating their calculations into clean, deterministic JavaScript/TypeScript code, and ensuring high numerical accuracy. I will carefully map inputs, intermediate calculations, and outputs, then implement the solver logic for cost, EV km, and self-consumption optimization, with charts and profiles aligned to your Excel time-series. I prioritize clear documentation and maintainable code so the app can become the primary calculation tool. Looking forward to discussing milestones and making your application accurate and reliable. Best regards, Alesha