Founding Fullstack Engineer
Everstar
Founding Fullstack Engineer (3–8 Years Experience)
Location: New York, NY (In‑Person)
Compensation: Top of Market + Equity + Benefits
About Everstar
Everstar is a nuclear AI company accelerating regulatory and compliance processes through tactical AI applications. Our flagship platform, Gordian , equips nuclear licensing teams with precision‑engineered AI tools for search, research, and compliance document drafting. Built by a world‑class team of domain experts and engineers — including a former senior NRC executive and talent from SpaceX and Silicon Valley startups — we move with wartime urgency to solve one of humanity’s hardest problems: powering the planet safely and at scale.
You’ll be joining a team that:
Cares about climate and recognizes it as the most ambitious problem of our lifetime.
Wakes up every day on fire about solving energy for the betterment of our future.
Believes in building shit that matters, not just apps for clicks or ad dollars.
The Role
We’re looking for a Founding Fullstack Engineer with the skill and leadership to shape Gordian’s user experience and technical foundations. You’ll obsess over clean code and practical solutions, but also step up as a leader who owns problems end‑to‑end. This is a chance to leave a real mark: the products you build will directly support the operators keeping 20% of the U.S. electricity grid safe and reliable.
Who You’re Building For: Know Your Customer
Our customers are the critical operators in the nuclear industry. They’re overworked, under‑resourced, and carrying the weight of the grid on their backs. The tools you build will help them:
Onboard and train better
Execute safety‑critical workflows more efficiently
Keep vital infrastructure safe and reliable
This is meaningful work in the truest sense — you’re giving frontline professionals the tools they need to secure the energy backbone of our society.
What’s at Stake
If We Succeed: Operators get world‑class tools, nuclear scales to meet exploding energy demand, and we power the AI era with clean energy.
If We Fail: Nuclear remains stuck in red tape, operators stay overworked without modern tools, and humanity misses a once‑in‑a‑generation chance to solve climate.
You’ll Do
Architect and build user‑facing features across frontend + backend
Translate complex regulatory workflows into sleek, intuitive UI/UX
Lead by example: set standards for code quality, product ownership, and design taste
Collaborate with AI engineers and nuclear SMEs to ship impactful features
Balance speed and rigor — knowing when to optimize and when to ship
You Bring
3–8 years fullstack experience; strong TypeScript/React + backend fundamentals
Product sense: you care about usability, business outcomes, and design
Demonstrated leadership and ownership in past roles or projects
Bias towards action and problem‑solving without waiting for permission
Bonus: experience with physics models, technical SaaS, or regulated industries
Why Everstar
Top of market salary + equity
Full benefits, wellness stipend, and education support
Work IRL in New York with a mission‑driven founding team
Build products that keep the grid safe and accelerate the clean energy future
$140k - $160k
...About Us: Atomic is the venture studio that co-founds companies by pairing founders with the best ideas, teams, and resources, and... ...only a few months. We’re seeking a product-driven, founding engineer to join our team. As a core member of our team, you will not...SuggestedFull timeWork at officeLocal area3 days per week- ...Founding Fullstack Engineer (3–8 Years Experience) New York City (5 days on-site) · Top of market + equity + benefits TL;DR: Build the product that nuclear operators depend on daily. Own features end-to-end. High-leverage IC role with founding-level impact. The...SuggestedFull timeFor contractorsImmediate start
- ...gold standard and go-to for top-tier quality financial services for the backbone of the American economy. The Role As a Founding Engineer, you'll work directly with the founders to build the AI-native platform that empowers our M&A advisors to be 10x more productive...SuggestedFull timeWork experience placementCasual workRelocation package
- ...We are looking for a Full Stack Founding Engineer to help own the technical design, delivery, and operation of our enterprise software solution. You'll be a central voice in developing a technical strategy to shape the future of our platform, contributing code, designing...Suggested
- ...tackling challenging problems deserve the best compensation packages, and we will ensure that happens. High Impact: You will be a founding member and thus inherit the responsibilities of a founder. You will have immense ownership over your work, the product roadmap, and...SuggestedWork at office
$100k - $180k
...every idea matters, and every contribution counts. What we\'re looking for Vantager is seeking a passionate and experienced Founding Full Stack Engineer. This role is perfect for a self-driven software engineer who\'s excited about building intuitive user interfaces and...- ...our clients Location: San Francisco (On-site) Experience: 3–10 years Stage: Seed → Series B Role Type: Early hire / founding engineer Why This Role Exists You’ll design and build the systems that power the product — from APIs and data models to real-time...Full time
$250k - $300k
...Title - Founding Backend Software Engineer Salary - $250,000 to $300,000 The Opportunity Our client is an exceptionally well-funded, venture-backed technology startup building an entirely new category of AI-powered consumer software. Founded by a proven entrepreneur with...Worldwide- ...superintelligence. To achieve this, we need more great engineers. The work affects millions of people... ...we have brilliant founders, have found commercial success, and see a clear path... ...! The Role We're looking for a fullstack engineer to build the product our...Full time
- ...healthcare background - can perform like a 20-year veteran. The engineering challenge is building a platform deeply entwined and additive... ...the lucky few who happen to know the right person. Our founding team We've raised 34M from Accel and Bain Capital Ventures...Work at officeLocal area
- ...Founding Senior Backend Engineer (Data Platform / Integrations) Location: New York City — In-Person The Opportunity Our client is hiring a Founding Senior Backend Engineer to own the data platform end-to-end and build the team around it. This is a true...
$180k - $250k
...stablecoin rails. Real partners, real revenue signals, and significant ownership upside. Engineers who enjoy solving money-movement problems at scale will thrive here. Our founding team is building production-grade money infrastructure used by real partners. Research...Immediate startRelocation package$200k - $300k
...Founding Backend Engineer As a Founding Backend Engineer at Overtone, you will build and own the core systems behind a new kind of dating experience—one centered on real-time voice, AI-driven insight, and trust. You'll be joining the founding engineering team, with...Contract workWork at office- ...We’ve raised just over $10m to date with a ton of runway and are looking to continue growing our engineering team. About the role We’re looking for a founding BE infrastructure engineer to work closely with our CTO, engineering team, and customers. What you’ll...Full timeWork at officeFlexible hours
$165k - $220k
...More on Outro here: Our launch in WIRED Dr. Horowitz on NPR’s Science Friday About the Role We’re hiring a full‑stack TypeScript engineer to join the team as engineer #2 at Outro. Our product surface is expanding fast, from a high‑touch clinical service toward an integrated...Part timeInternshipFlexible hours$9 per hour
...Job Description Job Description Founding Product Engineer (Client Search) | AI + B2B SaaS | NYC (In-Person) We're partnering with a seed-stage B2B SaaS startup building AI-powered sales software for the $9T chemicals industry, an industry still operating on PDFs...Immediate start$250k - $350k
...individuals as well as some wildly successful entrepreneurial engineers. The CTO has built and sold his last 3 businesses and the... ...(40 on the research side). The team is eager to bring on a Founding Fullstack AI Engineer to join the team. There is a bit of wiggle room...- ...underneath the models, making new LLM releases more valuable, not redundant. The engineering team is currently 4 people and is expected to triple in size in the next two months. The company was founded by former engineers from Palantir, Meta, and Amazon. It has raised $6...
$200k - $250k
...Founding Engineer | NYC | $200k–$250k + Equity DevLogic is partnering with a stealth, pre‑seed‑backed startup in NYC to find their next Founding Engineer. This is a rare one. You'd be the second engineer in the building, working directly with two technical co‑founders...Work at officeRelocation packageFlexible hours- ...structure, and provide clarity to the team about moving pieces during periods of growth or change. About the role We’re looking for a Founding Engineer who wants real ownership. You’ll build features, talk to customers, and help shape the product as we figure things out...
$250k - $350k
The team is eager to bring on a Founding Fullstack AI Engineer to join the team. There is a bit of wiggle room on tenure necessary, we are looking at those with anywhere from 4 Years of Experience onwards. Role Highlights Design and deploy scalable search/retrieval pipelines...- ...and service for our B2B partners allows them to serve more homebuyers, with the products they need, at market leading rates. Founding Engineer The Founding Engineer will operate as technical leader focused on execution, velocity, and practical problem-solving in an early...Self employmentRemote work
- ...We are hiring a founding engineer. This is not a normal engineering job. You will help decide what the company becomes, because the first... ...started and sold two companies to public companies, most recently Fullstack Academy Rush Sadiwala, experienced serial founder with deep...
$130k - $160k
...driven company. Role Description Saige is looking for a software engineer excited to work on meaningful problems at the intersection of... ...pipelines to user-facing components. This is a full‑time, on‑site Founding Engineer role based in New York City. Team Description Saige's...Full time- ...Early engineering hire at a well-funded seed-stage startup taking on the proxy advisory duopoly with AI. Hybrid NYC, work directly with... ...approach to corporate governance We’ve raised a sizable seed, the founding team blends deep capital markets experience with technical...Work at office
- ...Founding AI Engineer (LLM + Production) Location: New York, NY (In‑Person) Compensation: Top of Market + Equity + Benefits About Everstar... ...pipelines for regulated environments Collaborate with fullstack engineers and nuclear experts to deliver reliable AI...Full timeWeekend work
- ...with high autonomy and deep technical ownership. Backed by founding members of OpenAI, FAIR, and Hugging Face. We move fast, ship... ...builders who do the same. Role Description We’re looking for a fullstack engineer who wants to build the interfaces, tools, and infrastructure...Full time
$150k - $200k
...The Role We're hiring our Founding Platform Engineer to own the foundation every agent and product at Avallon is built on: the runtime, the data plane, the identity layer, the security surface, and the observability that makes all of it real. Your work defines how reliable...Immediate startRelocation- ...Fortify is modernizing student financing. We're looking for a full-stack engineer who's excited about fintech, capital markets, and product to join us in opening up access to education. About us: Fortify helps students succeed by giving them more affordable ways...Full time
- ...now building the product that all of that infrastructure was designed to power: an AI CFO agent. About the Role We’re hiring a Founding Engineer to work primarily on the new AI CFO agent. This role is tech‑lead‑level autonomy from day one. You will own and deliver on the...Visa sponsorship
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Fullstack Engineer. Be the first to apply!
- mean stack developer New York, NY
- junior full-stack web developer New York, NY
- lead full stack java developer New York, NY
- remote .net full stack web developer New York, NY
- full stack cloud developer New York, NY
- entry level full stack developer New York, NY
- junior full stack developer New York, NY
- senior java full-stack developer New York, NY
- senior full stack web developer New York, NY
- senior full stack developer New York, NY


