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Back to jobs Senior Front End Developer – AI & LLMs London (Euston Square) About Modo Energy The energy transition is the biggest infrastructure buildout in human history. Modo Energy is the data platform at the centre of it. We build the benchmarking, forecasting, and valuation tools that the world's most serious energy investors, developers, and operators depend on to make decisions. If a battery gets financed, built, or traded anywhere in the world, there's a good chance Modo data was in the room. Founded in 2019, we're 80+ people across London, New York, Sydney, and Madrid; $30M Series B, AI-native, and moving fast. This is a rare chance to join a category-defining company at the moment it's scaling globally. The Role We seek a Frontend Engineer to help lead the architectural evolution of our UI. As part of a team, your main goal is to build a frontend architecture that supports rapid, AI-assisted development. We are AI-native and our tech stack is TypeScript, React, and Next.js in a modern monorepo architecture, designed to support rapid feature development and AI-assisted engineering workflows. We are looking for individuals who love product-building and want to work with pace at a mission-oriented start-up. Responsibilities Architectural Strategy: help with the technical direction for our frontend monorepo to ensure long-term scalability. Component System Architecture: help design and develop our internal UI library (based on MUI). Performance Engineering: help build and improve high-performance, low-latency user interfaces. Essential: 5+ years of professional experience in Frontend Development. Excellent TypeScript, React, and modern JavaScript with Next.js Experience with Material UI (MUI) or similar component libraries. Testing principles and experience with frameworks like Jest and Cypress or Playwright. AI assisted development skills. An eye for design (UI/UX): Ability to build polished, aesthetically pleasing interfaces and bridge the gap between design and engineering. Proficient with Git, Docker, and CI/CD workflows. Familiarity with Monorepo structures and tools (e.g., Turborepo, Yarn Workspaces). Bachelor’s/Master’s degree in Information Technology, Computer Science, or equivalent experience. Desirable: Any start-up / scale-up experience is beneficial. Familiarity with Python is advantageous. Any experience of the energy sector is highly desirable. Salary & Benefits £70,000 - £120,000 Equity Share Scheme Private top-tier Healthcare and Dental coverage with Bupa, Salary sacrifice pension with 3% employer contribution; 25 days annual leave (excluding bank holidays), plus 5 flexible days to be taken on a Monday or a Friday. A great social scene, company nights out, outdoor events, networking events, and lots of snacks and drinks – obviously! The salary range listed reflects industry benchmarks for this role. Modo Energy's policy is to pay top of personal market - if you're exceptional, we'll make it work. We want the best engineers! NOTE: Hybrid Work Environment. We are all in-office days Tuesday, Wednesday & Thursday, and we are based by Euston Square. Modo Energy is an equal opportunity employer. Employment decisions are made on the basis of qualifications, merit, and business need. We do not discriminate on the basis of age, national origin, physical or mental disability, race, religion, pregnancy, sexual orientation, gender identity, veteran status, or any other characteristic protected under applicable UK law, including the Equality Act 2010. If you require assistance or a reasonable accommodation during the application or interview process, please contact us at [email protected] What You Can Expect From Us At Modo Energy, we believe that exceptional work deserves exceptional reward. We're a high-performance team; ambitious, collaborative, and genuinely motivated by the scale of what we're trying to build. You'll have real ownership from day one, work alongside some of the brightest people in the industry, and be part of a company that's defining a new category in the global energy market. We're hybrid: everyone works Tuesday to Thursday in office, with Monday and Friday flexible. We offer top-of-market compensation, equity for every employee, and the space to take your career wherever you want it to go. We're looking for people who want to do the best work of their careers. If that's you, we want to talk. Create a Job Alert Interested in building your career at Modo Energy? Get future opportunities sent straight to your email. Create alert Apply for this job indicates a required field First Name* Last Name* Preferred First Name Email* Phone Country* Phone* 244 results found No results found Afghanistan+93 Åland Islands+358 Albania+355 Algeria+213 American Samoa+1 Andorra+376 Angola+244 Anguilla+1 Antigua & Barbuda+1 Argentina+54 Armenia+374 Aruba+297 Ascension Island+247 Australia+61 Austria+43 Azerbaijan+994 Bahamas+1 Bahrain+973 Bangladesh+880 Barbados+1 Belarus+375 Belgium+32 Belize+501 Benin+229 Bermuda+1 Bhutan+975 Bolivia+591 Bosnia & Herzegovina+387 Botswana+267 Brazil+55 British Indian Ocean Territory+246 British Virgin Islands+1 Brunei+673 Bulgaria+359 Burkina Faso+226 Burundi+257 Cambodia+855 Cameroon+237 Canada+1 Cape Verde+238 Caribbean Netherlands+599 Cayman Islands+1 Central African Republic+236 Chad+235 Chile+56 China+86 Christmas Island+61 Cocos (Keeling) Islands+61 Colombia+57 Comoros+269 Congo - Brazzaville+242 Congo - Kinshasa+243 Cook Islands+682 Costa Rica+506 Côte d’Ivoire+225 Croatia+385 Cuba+53 Curaçao+599 Cyprus+357 Czechia+420 Denmark+45 Djibouti+253 Dominica+1 Dominican Republic+1 Ecuador+593 Egypt+20 El Salvador+503 Equatorial Guinea+240 Eritrea+291 Estonia+372 Eswatini+268 Ethiopia+251 Falkland Islands+500 Faroe Islands+298 Fiji+679 Finland+358 France+33 French Guiana+594 French Polynesia+689 Gabon+241 Gambia+220 Georgia+995 Germany+49 Ghana+233 Gibraltar+350 Greece+30 Greenland+299 Grenada+1 Guadeloupe+590 Guam+1 Guatemala+502 Guernsey+44 Guinea+224 Guinea-Bissau+245 Guyana+592 Haiti+509 Honduras+504 Hong Kong SAR China+852 Hungary+36 Iceland+354 India+91 Indonesia+62 Iran+98 Iraq+964 Ireland+353 Isle of Man+44 Israel+972 Italy+39 Jamaica+1 Japan+81 Jersey+44 Jordan+962 Kazakhstan+7 Kenya+254 Kiribati+686 Kosovo+383 Kuwait+965 Kyrgyzstan+996 Laos+856 Latvia+371 Lebanon+961 Lesotho+266 Liberia+231 Libya+218 Liechtenstein+423 Lithuania+370 Luxembourg+352 Macao SAR China+853 Madagascar+261 Malawi+265 Malaysia+60 Maldives+960 Mali+223 Malta+356 Marshall Islands+692 Martinique+596 Mauritania+222 Mauritius+230 Mayotte+262 Mexico+52 Micronesia+691 Moldova+373 Monaco+377 Mongolia+976 Montenegro+382 Montserrat+1 Morocco+212 Mozambique+258 Myanmar (Burma)+95 Namibia+264 Nauru+674 Nepal+977 Netherlands+31 New Caledonia+687 New Zealand+64 Nicaragua+505 Niger+227 Nigeria+234 Niue+683 Norfolk Island+672 North Korea+850 North Macedonia+389 Northern Mariana Islands+1 Norway+47 Oman+968 Pakistan+92 Palau+680 Palestinian Territories+970 Panama+507 Papua New Guinea+675 Paraguay+595 Peru+51 Philippines+63 Poland+48 Portugal+351 Puerto Rico+1 Qatar+974 Réunion+262 Romania+40 Russia+7 Rwanda+250 Samoa+685 San Marino+378 São Tomé & Príncipe+239 Saudi Arabia+966 Senegal+221 Serbia+381 Seychelles+248 Sierra Leone+232 Singapore+65 Sint Maarten+1 Slovakia+421 Slovenia+386 Solomon Islands+677 Somalia+252 South Africa+27 South Korea+82 South Sudan+211 Spain+34 Sri Lanka+94 St. Barthélemy+590 St. Helena+290 St. Kitts & Nevis+1 St. Lucia+1 St. Martin+590 St. Pierre & Miquelon+508 St. Vincent & Grenadines+1 Sudan+249 Suriname+597 Svalbard & Jan Mayen+47 Sweden+46 Switzerland+41 Syria+963 Taiwan+886 Tajikistan+992 Tanzania+255 Thailand+66 Timor-Leste+670 Togo+228 Tokelau+690 Tonga+676 Trinidad & Tobago+1 Tunisia+216 Turkey+90 Turkmenistan+993 Turks & Caicos Islands+1 Tuvalu+688 U.S. Virgin Islands+1 Uganda+256 Ukraine+380 United Arab Emirates+971 United Kingdom+44 United States+1 Uruguay+598 Uzbekistan+998 Vanuatu+678 Vatican City+39 Venezuela+58 Vietnam+84 Wallis & Futuna+681 Western Sahara+212 Yemen+967 Zambia+260 Zimbabwe+263 Resume/CV* Attach Enter manually Accepted file types: pdf, doc, docx, txt, rtf LinkedIn Profile* Do you have hands-on experience building production applications with Next.js and TypeScript? * Select... Have you worked with a shared component library or design system (e.g. MUI) used by multiple engineers?* Select... In 3–5 sentences, describe a frontend system or UI you’ve owned in production. What were the main technical challenges and how did you approach them?* In 500 characters or less, explain why you’re excited by this role and Modo Energy* If hired, would you now or in the future require work authorization to work in the UK?* Select... Are you open to a hybrid work schedule - 3 days in office and 2 days remote? * * Select... What is your current notice period - when you would be looking to start your next role?* Responsibilities Architectural Strategy: help with the technical direction for our frontend monorepo to ensure long-term scalability. Component System Architecture: help design and develop our internal UI library (based on MUI). Performance Engineering: help build and improve high-performance, low-latency user interfaces. Essential: 5+ years of professional experience in Frontend Development. Excellent TypeScript, React, and modern JavaScript with Next.js Experience with Material UI (MUI) or similar component libraries. Testing principles and experience with frameworks like Jest and Cypress or Playwright. AI assisted development skills. An eye for design (UI/UX): Ability to build polished, aesthetically pleasing interfaces and bridge the gap between design and engineering. Proficient with Git, Docker, and CI/CD workflows. Familiarity with Monorepo structures and tools (e.g., Turborepo, Yarn Workspaces). Bachelor’s/Master’s degree in Information Technology, Computer Science, or equivalent experience. Desirable: Any start-up / scale-up experience is beneficial. Familiarity with Python is advantageous. Any experience of the energy sector is highly desirable. Salary & Benefits £70,000 - £120,000 Equity Share Scheme Private top-tier Healthcare and Dental coverage with Bupa, Salary sacrifice pension with 3% employer contribution; 25 days annual leave (excluding bank holidays), plus 5 flexible days to be taken on a Monday or a Friday. A great social scene, company nights out, outdoor events, networking events, and lots of snacks and drinks – obviously! The salary range listed reflects industry benchmarks for this role. Modo Energy's policy is to pay top of personal market - if you're exceptional, we'll make it work. We want the best engineers! NOTE: Hybrid Work Environment. We are all in-office days Tuesday, Wednesday & Thursday, and we are based by Euston Square. Modo Energy is an equal opportunity employer. Employment decisions are made on the basis of qualifications, merit, and business need. We do not discriminate on the basis of age, national origin, physical or mental disability, race, religion, pregnancy, sexual orientation, gender identity, veteran status, or any other characteristic protected under applicable UK law, including the Equality Act 2010. If you require assistance or a reasonable accommodation during the application or interview process, please contact us at [email protected] What You Can Expect From Us At Modo Energy, we believe that exceptional work deserves exceptional reward. We're a high-performance team; ambitious, collaborative, and genuinely motivated by the scale of what we're trying to build. You'll have real ownership from day one, work alongside some of the brightest people in the industry, and be part of a company that's defining a new category in the global energy market. We're hybrid: everyone works Tuesday to Thursday in office, with Monday and Friday flexible. We offer top-of-market compensation, equity for every employee, and the space to take your career wherever you want it to go. We're looking for people who want to do the best work of their careers. If that's you, we want to talk.