Web3 Engineering Python Jobs in Los Angeles, United States
















Job Title | Company Name | Salary | Location | Tags | Posted | |
---|---|---|---|---|---|---|
Lightspark | 240k-310k/year | 📍 Culver City, Los Angeles, CA | RustPythonEngineeringKotlin | 2d |

Principal Engineer, Spark (Bitcoin/ETH/L2)
at Lightspark
Sep 02, 2025

Lightspark is building open payments for the Internet—always-on payment solutions powered by Bitcoin, the only open, neutral network for moving value. With enterprise tools like Connect, UMA, and Spark, businesses can send and receive money instantly, securely, and at a fraction of the cost, anytime, anywhere. Lightspark is headquartered in Los Angeles, California, but serves the world.
Spark (spark.money) is a Bitcoin-native Layer 2 for payments and settlement that delivers the fastest, simplest, and cheapest rails in crypto while enabling native, scalable, self-custodial assets like BTC and stablecoins. This is a rare opportunity to join a brand-new L2 for Bitcoin, work on the infrastructure behind our fastest-growing product with top-tier customers, and help build the future of scalable Bitcoin payments.
The Spark Operator (SO) team is at the core of our protocol, responsible for writing the code that serves as the backbone of the Spark network. We’re seeking a highly adaptable, hands-on Principal Engineer who can work across domains to define architecture from the ground up, dive into unfamiliar territory, and design, build, and scale a next-generation open payments network. You’ll work directly with our CTO and early engineering team to influence protocol evolution and deliver the infrastructure for a Bitcoin Layer 2 that is reshaping global payments.
WHAT YOU’LL BE DOING:
- Design, build, and scale distributed backend services that power Spark
- Own system architecture for highly available, low-latency services processing real-time Bitcoin transactions globally
- Extend and enhance protocol capabilities to support new markets, assets, and payment flows (including BTC and stablecoins)
- Write high-quality, production-grade code across multiple domains and layers of the stack (core protocol logic, orchestration, data infra, monitoring)
- Analyze complex distributed behaviors in adversarial environments and design resilient systems that can withstand them
- Work directly with leadership to influence long-term protocol direction and technical strategy
- Mentor engineers, raising the bar for technical depth and execution
- Adapt quickly to new challenges, whether designing new systems, debugging complex distributed behaviors, or scaling production infrastructure under load
WHAT WE’RE LOOKING FOR:
- 10+ years of engineering experience, with significant contributions to Bitcoin, Ethereum, L2s, or the stablecoin ecosystem
- Deep experience building adversarial distributed systems and protocol-level infrastructure
- A strong systems thinker who understands cryptography fundamentals (without needing to be a cryptographer) and how crypto-native communities operate
- Proven ability to independently analyze complex systems, identify weaknesses, and implement improvements
- Strong track record of technical leadership: driving architecture decisions, shaping roadmaps, and shipping mission-critical systems
- Comfortable operating across different languages, frameworks, and problem domains; primary stack includes Go, with additional work in Python, Rust, C++, and Kotlin
- Hands-on experience with modern infrastructure tooling (Docker, Kubernetes, AWS, monitoring/observability stacks)
- Pragmatic problem-solver with a data-driven mindset and strong debugging chops
- CS degree or equivalent is welcome but not required—we value deep skill and proven contributions over credentials
Lightspark is on a mission to build an open payment protocol for the Internet at scale and therefore we’re committed to creating a more inclusive and diverse workplace to reflect the customers we serve. We welcome interest from individuals of all backgrounds and levels of experience who share our mission. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other applicable legally protected characteristics.Â
Listed in: Cryptocurrency Jobs, Rust Web3 Jobs, Python Crypto Jobs, Engineering Web3 Jobs, Kotlin Crypto Jobs, Bitcoin Crypto Jobs, Stablecoin Web3 Jobs, Ethereum Web3 Jobs, Full Time Web3 Jobs, Web3 Crypto Jobs.


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Head of GTMMimic Protocol
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Chief of Staff & SVP SalesTheStreet / Roundtable
CryptoJobsList has been great! About to hire 1 new rep and considering countless others as well.


Co-Founder and COOMultiverse
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Co-Founder and COOStickies
We hired our Head of Social through CryptoJobsList and received an impressive talent pool of over 80 passionate individuals interested in working in the crypto space. After interviewing 10 candidates, we found the perfect fit for our team. The platform was easy to use, and the team was incredibly responsive and helpful throughout the hiring process. As a consumer web3 startup, we highly recommend CryptoJobsList for any company looking to hire top talent in the crypto industry.


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We've had a first round of interviews with 5+ applicants from CryptoJobsList and, like last time, it has been our best source of leads. We are still in the process of doing a second round of interviews and anticipate closing the role in the next week or two.


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Co-Founder & CEOWalletChat
We have already made several hires via CryptoJobsList. So far, we are happy with each one of them. CJL offers an easy to use platform and the candidates we receive are generally well versed with and a good fit for the web3 space — which is a challenge when hiring via traditional platforms. On top of this, the team has been super responsive whenever we've tried reaching out and we feel like we are talking to a friend. Excited to keep seeing CJL grow together with us, as we deliver the future of wallet-to-wallet messaging!


Founder & COOAavegotchi | Pixelcraft Studios
We've got a really strong looking shortlist and will be having calls all through this week with those. I'm quite pleased with the results!


Chief of StaffUMA Project
We recently switched to using CryptoJobsList as our primary crypto job board provider, and I have been pretty impressed thus far with the talent coming through. The latest feature of having a dashboard is a game changer, so thank you!


Co-founderFloating Point Group
Kevin here, founder of Floating Point Group. I just wanted to say that you guys are killing it. Some of our best applicants are coming from your site. Very happy with what we’re seeing so far!


Co-founder & HostEpicenter Podcast
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Project LeadTHORChain
We received over a dozen high-quality job applications in less than a week to this post. It has been very effective and would highly recommend. Service is excellent, UX simple. Thanks CryptoJobsList!


General ManagerMeld Gold
Great experience. We have had excellent candidates via Raman and the CryptoJobsList platform. Will definitely use again as we build out other components of the team!


Communications LeadKleros
CryptoJobsList drives more qualified leads than AngelList!


Cofounder & COOFleek
We've gotten great leads for developers from CryptoJobsList. I'm definitely a continuous user going forward!


Founder & CEODataStreamX
The quality of the candidates are by far more relevant and experienced than on other boards. They are in the crypto space and have the past experience to hit the ground running.


Co-founder & COOAID Technology
Each time their services have been nothing short of exceptional. The platform has consistently provided us with a large pool of qualified candidates for various roles within our company. The user-friendly interface and the efficient recruitment process has made it easy for us to fill positions quickly and effectively. We are grateful for the help and support provided by CJL and highly recommend their services to anyone looking to fill roles in the crypto industry.

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We posted on CryptoJobsList looking for marketing help with community engagement, digital marketing and social media and found two highly qualified candidates within days! We interviewed and hired them within three weeks.