LiquidFi (Miami, FL) | Senior Software Engineer - Solidity + Python | ONSITE | Full-time | https://liquidfi.io

We're reimagining mortgages through blockchain - tokenizing real estate debt to make mortgage investing more transparent, accessible, and liquid. Early-stage, profitable, and moving fast.

THE ROLE: Build smart contracts in Solidity that power mortgage tokenization, develop Python services/APIs connecting blockchain to the real world, and own features end-to-end. You'll wear multiple hats - one minute writing a Solidity payment contract, next debugging a Python API, then optimizing Celery tasks. Small team = big impact.

STACK: - Smart contracts: Solidity, OpenZeppelin, Hardhat/Foundry - Backend: Python (Django, DRF), Celery, RabbitMQ, PostgreSQL - Infrastructure: AWS, Docker, EVM-compatible chains - Integrations: Web3.py

LOOKING FOR: - 10+ years building products with serious Solidity + Python chops - Experience developing EVM-compatible smart contracts - Expert with Django, DRF, Celery - Strong distributed systems & async programming experience - Deep understanding of blockchain fundamentals, DeFi, token standards (ERC-20, ERC-721, ERC-1155) - Bonus: financial services, mortgages, or asset-backed tokens

WHY JOIN: - Own big pieces of the stack from day one - Competitive pay + meaningful equity - Shape the future of real estate finance - Small, passionate team

LOCATION: Miami, FL - onsite required (South Florida candidates welcome)

Apply: Email is hidden with resume + note about your Solidity/Python experience

Hiring Tech Lead - Backend Engineer - AI Engineer - Staff Frontend – REMOTE LATAM - Tech Lead in San Francisco We build AI tools that help high-volume law firms manage their caseloads more efficiently. Our first product—an AI assistant that transcribes and classifies inbound calls—is in production. We’re now expanding into case tracking, follow-ups, and full workflow automation.

Looking for:

Tech Lead: Based in SF. Remote work with 1 week/month onsite. Lead a senior team, shape product and tech, work closely with founders.

Senior Engineers (Backend, Frontend, AI): Remote across LATAM. Build fast, useful tools. Small, experienced team. Real autonomy and product impact.

Tech Stack: Python, TypeScript, Postgres, Kubernetes, GCP Languages: Spanish + English for leadership. English only OK for engineers.

Apply here: tramcase.com

Crux | cruxclimate.com | FULLY REMOTE (US/Canada)| Full-time | Hiring across eng, Product, Design | $140k-$250k base + equity

Series B (a16z backed) Crux is the capital markets platform changing the way clean energy and manufacturing projects are financed in the U.S. Crux's platform, market intelligence, and expert team help developers and manufacturers unlock financing through all stages of project development and operation.

Hiring for: - AI Engineers - Full Stack Engineers - Data / ML Ops Eng - Product Designer - Product Manager - Sr. Tech Recruiter - Additional GTM/Ops

More about the team here: https://www.notion.so/engineering-crux-26cd41408c6780728eafd...

Apply Here: https://jobs.ashbyhq.com/cruxclimate?utm_source=mr

Smarkets (https://www.smarkets.com) | Full Time | Hybrid - Onsite (London, UK), Remote - Indiana, US and Sweden

Smarkets is a betting exchange for sports and political trading that has handled over £37 billion in volume since 2010. Our company mission is to fix the betting industry with the best products and best prices.

We are currently looking for:

Senior Software Engineer - Backend, Distributed Systems, Rust, London, UK - https://smarkets.com/job/41fba25f-0896-46d5-a093-8ebbc9e1624...

Software Engineer - Backend, Python, Rust, London, UK - https://smarkets.com/job/aaaf901f-77c0-4b35-9240-ed4cfa668ba...

Senior Quantitative Developer, London, UK - https://smarkets.com/job/5502cdbe-6246-47ec-890b-2f2817e3cf1...

Dev Ops Engineer - London, UK - https://smarkets.com/job/99823479-fd3a-4720-8090-455394fb63f...

Senior Cloud Infrastructure Engineer - London, UK - https://smarkets.com/job/7ee3a731-acc0-448f-bc61-64429e2ebf9...

QA Analyst - Contractor, Sweden - https://smarkets.com/job/52aad884-0aab-477e-a99c-8a76f38f42a...

QA Analyst - Contractor, Indiana, US - https://smarkets.com/job/494945c5-a687-4ffd-b117-d2f7a1074a8...

Data Engineer - London, UK - https://smarkets.com/job/3499be76-c66b-49eb-b6b8-c2d24fee622...

Founder's R&D Engineer - London, UK - https://smarkets.com/job/a42cba2e-e0e7-42e7-b156-3e56b485435...

Frequenz Energy-as-a-Service GmbH | Full-Time | Berlin/Hybrid-Possible, Germany

We are a technology company developing groundbreaking solutions that help companies to rapidly transition from being passive electricity consumers to becoming fully self-sustaining prosumers, capable of leveraging various renewable energy assets.

We are currently looking for Rust and Python software developers to join us in Berlin.

Our homepage: https://www.frequenz.com

Apply here for Rust: https://www.frequenz.com/jobs/senior-rust-engineer and here for Python: https://www.frequenz.com/careers/senior-python-developer

Feel free to attach links to your code examples from github, gitlab, or the like to your application.

These roles are not fully-remote. These are based in Berlin, with a possibility for hybrid-model, which can be discussed during the course of the interview.

(PS: If you choose to apply, we would appreciate if you could mention that you have come from HN :) )

LaunchDarkly is hiring Remote Senior Product Security Engineer: https://grnh.se/xonwo33o3us

OnFrontiers | Senior Engineer | Hybrid/Remote | NYC or Baltimore

OnFrontiers is hiring a strong senior engineer with experience programming agents to lead development of our agentic intelligence platform for government contractors.

We're looking for a passionate, curious engineer, who wants to work closely with our founding team and contribute as both a technical expert and a member of the product leadership.

In the role, you'll lead development of our indexing services, LLM integrations and APIs, as well as our SaaS platform, as we continue to scale. The role is hands-on but has the potential to grow into management as the team scales.

Core technologies include OpenSearch, Postgres & PGVector, Go, Python and React, all running on AWS.

https://www.onfrontiers.com/job-postings/lead-engineer

Interested, feel free to email me directly: Email is hidden

Sumble is the newco from the founders of Kaggle. We are hiring software engineers, data engineers, machine learning/ai engineers, growth and a designer.

Can view our roles and apply here: https://apply.workable.com/sumble-inc/

As background, we are building a knowledge graph from web data with a first focus on data for go-to-market teams. We use web data to identify things like org structure, tech stack, and key projects (e.g., GenAI initiatives, cloud migrations). Our product already has strong product-market fit, early revenue, and happy customers — and now we’re ready to accelerate.

Our long-term vision is to become the primary destination for accessing high-quality web data. Try the product at sumble.com.

We are a team of 15, including 10 engineers with experience at companies such as Google, Meta, Stack Overflow, and Kaggle.

Continua AI | https://continua.ai | Multiple Roles | ONSITE (NYC/Seattle) | Full-time | Salary + Equity

At Continua (http://continua.ai/), we're on our way to solving Social AI, and we're expanding our team! We've built an AI agent that users can invite into group conversations to make planning, coordination, and information retrieval effortless. We're social creatures and it just seemed to us a huge opportunity to bring AI into group settings. We've seen strong retention over the last few months and want you to help us bring our product to the next level. Try adding our agent at http://continua.ai/ to group chats and kick the tires!

I’m David (https://www.linkedin.com/in/dpetrou/), the founder and CEO. Before starting Continua, I was a Distinguished Software Engineer at Google. We’re backed by top-tier VCs and incredible angel investors. Our team is a fantastic bunch (http://continua.ai/team) of accomplished engineers and researchers from Google, Slack, Disney, and several AI startups. We're pretty clued in on the technology side and have a strong vision of how the transformative technology of the last few years along with our own secret sauce (not just a ChatGPT wrapper) can help a huge number of people.

We’re hiring a Senior/Staff Machine Learning Engineer, a full-stack engineer, a systems engineer, and a content creator: https://jobs.ashbyhq.com/continua/

For the ML role: you'll work on building and improving the best LLM group chat experience there is, including fine-tuning models to boost conversational quality and improve scalability and identifying novel ways to build a "memory" which leads to a personalized and unique experience for our users. You're an experienced machine learning engineer with broad knowledge and skills and have experience fine-tuning LLMs for both generative and discriminative use cases. You have a Master's or PhD in Machine Learning (or a Bachelor’s with exceptional industry experience). You understand what it means to work at a fast-moving startup.

Oh, and we maintain a vibrant blog, including items of technical interest, at http://blog.continua.ai/. Check it out! :)

David

Ours Privacy (https://oursprivacy.com) | Senior/Principal Software Engineer | Full-stack | Remote (US)

Ours Privacy is building a HIPAA-compliant Customer Data Platform (CDP) and Consent Management Platform (CMP) designed for healthcare organizations. We help hospitals and digital health companies use analytics, consent, and personalization tools without compromising on privacy.

Our stack: Our stack: React, Node.js/TypeScript, and AWS (Lambda, API Gateway, S3, Step Functions, CloudFront, WAF, DynamoDB, Athena/Iceberg).

What we’re looking for: • Startup mindset: bias toward shipping, ownership, and iterating quickly. • Engineers who enjoy working across the stack • Comfort with AWS (serverless preferred) and TypeScript/JavaScript.

Why join us: • Early stage, venture-funded startup — own complete features. • Remote-first (US-based team). • Small, senior team that values technical excellence, transparency, and work-life balance. • Flexible job title

Apply: https://oursprivacy.com/careers/software-engineer