Deducta | Senior Backend Engineer | London, UK (Hybrid) | deducta.com

Company: We’re a data intelligence platform for global enterprises. We are well funded, growing fast, and actively solving the most pressing data challenges for some of the largest and most recognizable companies in the world.

Role: We’re looking for a Senior backend engineer with a strong sense of software craft and solid .NET/Scala experience to be part of the design/building/maintenance of our core systems. Specifically: - Architect, build, and maintain data ingestion and processing engines for enterprise scales with ultra-high reliability

- Drive business growth through a combination of ideation and experimentation to optimize our product, and front-line problem solving for our customers

Stack: .NET, SQL, Azure

Comp: £150k+

Process: Screen —> Technical —> Final interview —> Offer

Contact: kimathi [at] deducta dot ai / Apply: https://apply.workable.com/deducta/j/51567707C5/

Bustem.com | Founding Engineer | NYC (On-site) | $140k–$180k + 0.25%–1.0%

Bustem helps e-commerce brands & more, find and shut down copycats, counterfeiters, and unauthorized sellers.

In <12 months: $3M+ ARR, 150+ brands, profitable, no outside capital.

We’re hiring a Founding Engineer to build the core systems behind detection + enforcement.

What you’ll do: Build real-time infringer detection (scraping + AI) Build automated enforcement systems (agents/workflows at scale) Own systems end-to-end (architecture → deployment → iteration)

Stack: Next.js, Postgres, modern backend infra, LLMs

You: Ship fast, high ownership Comfortable with ambiguity Build systems, not tickets

Why join: Profitable + real traction No legacy / no bureaucracy Direct impact on product + revenue Early enough to matter a lot

NYC in-person

Email: genci@bustem.co (send CV & GitHub / projects)

ChainSecurity | Blockchain Security Engineer | Full-time | INTERNS , HYBRID/REMOTE, Zurich, Switzerland | VISA possible | https://chainsecurity.com/

ChainSecurity is a young and innovative cybersecurity company that operates in the blockchain and cryptocurrency space. Our mission is to make the blockchain space secure and trustworthy for people, companies, and governments alike. We are proud of our security experts from the renowned universities ETH Zurich, EPFL Lausanne and others.

We are trusted by 100+ blockchain companies and established corporations with security audits and services. We have secured complex systems for top blockchain clients, such as decentralized finance (DeFi) projects, and multinational organizations, such as banks and industrial consortia. A ChainSecurity Auditor will review the most complex blockchain projects to find vulnerabilities which no-one else can. By using state of the art tools, expert knowledge and a deep understanding of the fundamentals, we secure projects handling billions, often forming the foundation in the new paradigm of an open financial system.

Your Responsibilities:

* Work directly with the developers of the most successful teams in the blockchain industry to audit their code and secure their products

* Contribute to our security tools and create new ones in collaboration with our internal research team

* Conduct security research and publish your findings Requirements:

* Strong background in software engineering, focused on security relevant areas and most importantly being able to reason about complex code

* Experience with penetration testing, vulnerability scanning, threat modeling or similar is a plus

* Good knowledge of cryptography

* Proficiency with Linux and Git

* Good written communication skills

* Fluent in OOP programming language

Bonus Points:

* Formal Verification, White Box, Vulnerability Scanning

* Solid Blockchain Knowledge

* Consensus Algorithms

Join us here: https://www.chainsecurity.com/jobs/blockchain-security-engin...

Questions about the role? Contact: jobs@chainsecurity.com

Prosper AI | getprosper.ai | ONSITE Barcelona | Full-time

We build AI phone agents for US healthcare — insurance claims, benefit verification, scheduling. 300K+ calls/month, Series A closed, R&D fully in Barcelona.

Stack: Python, FastAPI, React/TypeScript. Small eng team, fast pace, real ownership.

Hiring for: - Senior Software Engineer: https://jobs.ashbyhq.com/prosper-ai/29fbeb7b-5673-498f-8333-... - Software Engineer: https://jobs.ashbyhq.com/prosper-ai/92f63920-a269-4039-8cf9-...

3–4 days onsite in Eixample. Stock options. ~2 week process.

Questions welcome, feel free to email our freelance recruiter Todora at hello@todora.co

Freight Brokerage | NJ | Founding Backend Architect (Python/PostgreSQL) | Remote (US, EST hours) | $150K + benefits

We're a freight brokerage in NJ building a self-hosted, AI-first platform to replace our legacy CRM/TMS.

The AI compute infrastructure and data foundation are already in place. We need the architect who turns it into a production operating system.

This is a systems architecture role, not a feature dev role. If your primary strength is writing features or following tickets, this is not the role.

You will be responsible for: designing and deploying a PostgreSQL schema for complex freight operations across 30+ entities. Building Python service layers integrating multiple REST APIs. Wiring locally-hosted LLM inference into business workflows. Structuring systems that involve document ingestion, email processing, and asynchronous event-driven pipelines. Defining backend patterns for reliability and maintainability across a multi-million record environment.

The entire stack is self-hosted on custom-built server hardware. Database, application layer, AI inference — all of it. No cloud dependencies. No API rate limits. No monthly GPU bills. No vendor lock-in. You have direct access to the metal, you deploy on your terms, and the only ceiling on what you can run is the hardware itself.

If you've ever wanted to build a production platform without a cloud provider standing between you and your infrastructure, this is that role.

You are the first technical hire. You report directly to the owner, who is directly involved in this hire and in daily collaboration on the build. Architectural decisions are yours to make. AI coding tools and low-code UI frameworks are part of the workflow — your time goes to data models, service orchestration, and API plumbing, not hand-building screens.

Stack: Python, PostgreSQL, FastAPI, Docker, Neo4j, Linux, vLLM. Preferred: freight/TMS domain, Microsoft Graph API, CRM migration experience.

1-week paid onsite onboarding in NJ, then fully remote. Equity conversation open once mutual fit is established.

To apply, send: (1) your resume, (2) a brief writeup of a system you designed end-to-end — not code, but the architecture decisions you made and why, (3) a short note on why this role interests you.

nj.technical.hire.spring.2026@proton.me

Mubit | https://mubit.ai | On-site, London (Canary Wharf) | Full-time

We're building the operational memory and state management layer for production AI agents — persistent execution history, shared state, and ACL-gated memory so agents get more reliable over time without constant human intervention.

Well funded and assembling the founding team. This is the beginning.

We're hiring for:

- Founding Engineer: https://jobs.ashbyhq.com/mubit/77a5ea32-5012-4073-b9a8-c5364...

BillionToOne (YC S17, NASDAQ: BLLN) | Menlo Park, CA | Onsite

We're a molecular diagnostics company. YC made a video of us recently: https://www.youtube.com/watch?v=kkv5rZhrLkc.

Our software team creates products that help detect prenatal genetic conditions non-invasively and uncover 50%+ more cancer treatment options. Your code reaches patients and the providers making decisions for them.

Stack: Python, React, TypeScript, AWS, Postgres. We believe in small teams with high ownership.

We're hiring:

- Senior Software Engineer (Prenatal, Oncology, Digital Experiences)

- Senior AI Engineer

- AI Engineering Intern

- Lead UX Designer / Designer

See our engineering specific recruiting page at https://engineering.billiontoone.com/#roles. You can reach out to me directly with a resume at kwu@billiontoone.com.

Colonist | Full-Stack Product Dev | Remote (Eastern Europe / SEA) | Full-time

Colonist (https://colonist.io/) is a multiplayer strategy game with millions of players. We're a small team and you'll own features end-to-end, from backend game logic to polished UI.

You'll work on evolving our game architecture, ensuring cleaner code boundaries and better scalability.

Stack: TypeScript, Node.js, React, CSS, PostgreSQL/SQL. We lean heavily on AI tooling for development.

More details and apply: https://jobs.ashbyhq.com/colonist/109d62c4-52f3-4980-9c49-d3...

  Results Generation | Cloud & DevOps Engineer | Austin, TX (Hybrid)

  We're a digital marketing platform company running a fleet of PHP/Lumen microservices on GCP, and supporting/rebuilding a legacy monolith. Small team, no bureaucracy, real infrastructure problems — multi-cluster Kubernetes, async messaging, database replication, content delivery at scale.
                                                                                                                                                                                 
  You'll own day-to-day infrastructure operations: multi-cluster Kubernetes, Terraform-driven GCP resources, Jenkins CI/CD pipelines, and on-call. Hands-on role — you're the person keeping production reliable and making it better.
                                                                                                                                                                                 
  Stack: GCP (GKE, Cloud SQL, GCS, Secret Manager, Workload Identity), Kubernetes, Terraform + Atlantis, Jenkins, Helm 3, Docker, MySQL (primary + replicas), RabbitMQ, Redis/Dragonfly, Elasticsearch, Grafana/Prometheus, Scalyr, Flux, Ansible.
                                                                                                                                                                                 
  Looking for: 3-5 years with cloud infrastructure in production. Solid Kubernetes and Terraform experience. Comfortable operating MySQL with replication. On-call experience — you've been paged and written postmortems. Networking fundamentals (VPNs, private endpoints, DNS, TLS).
                                                                                                                                                                                 
  Nice to have: GCP-specific experience, RabbitMQ, Elasticsearch, GitOps tooling, multi-cloud or cross-cloud migration experience.  

or just email me: dhawkins over at resultsgeneration.com

BrandMultiplier | Head of AI & Engineering | REMOTE | Fractional-to-Full-Time | Equity

We're a profitable B2B services company ($3M–$50M ARR clients) actively building a proprietary AI platform — and we need the technical leader to own the execution.

WHAT WE'RE BUILDING: A multi-agent AI platform that operationalizes our founder-story methodology into deployable client systems. Architecture spec exists, pieces are already in production. We're not starting from scratch — we're scaling a real build.

THE STACK: LLMs (Claude, GPT, Gemini), multi-agent orchestration (LangGraph/LangChain), RAG pipelines, vector databases, React/Next.js, Python/Node.js, AWS, n8n/Make for automation.

WHAT MATTERS MOST: You're not just an executor. You come to the leadership table with tools and approaches we haven't seen yet. You translate the CEO's vision into a technical spec, a build plan, and a shipped product — without needing everything pre-defined.

THE TEAM: 4 core people. You'd join the CEO, a Growth Strategist, and an Operations Manager — and lead one AI Engineer (your first direct report).

ENGAGEMENT: Starts fractional with a clear path to full-time and equity for the right fit. We're not VC-funded by design, so equity is unencumbered.

Read the full spec here: https://www.notion.so/brandmultiplier/Head-of-AI-Engineering...

General Manager, Nomad Insurance | Partnerships Manager | Platform Business Partner

Remote | Full-time

At SafetyWing (YC W18), we’re building a global social safety net for remote workers—simple health, insurance, and retirement products designed to replace national welfare systems. Our mission is to remove geographical borders as a barrier to equal opportunity and freedom for everyone. If we succeed, we believe this will be one of the most important tasks of our time.

Apply here: - General Manager, Nomad Insurance: https://safetywing.pinpointhq.com/postings/507a7c5e-f44d-411...

- Partnerships Manager: https://safetywing.pinpointhq.com/postings/b07c1584-3eac-485...

- Platforms Business Partner: https://safetywing.pinpointhq.com/postings/9df843c6-ef5c-4b1...

Tether is hiring multiple roles worldwide

We are a globally distributed, internet-native team of engineers, researchers, creators and builders working on technologies that scale to billions. We have zero interest in corporate red tape. We move fast, we ship industry-defining products, and we are fiercely dedicated to decentralization. If you are a brilliant builder ready to tackle foundational platforms in AI, finance, energy, and peer-to-peer tech, join us.

Apply now to join us:

React Native Developer (Worldwide): https://careers.tether.io/o/senior-react-native-mobile-devel...

React Native Lead (Worldwide): https://careers.tether.io/o/lead-mobile-developer-wdk-hacker...

Backend Developer for Wallets (Worldwide): https://careers.tether.io/o/backend-engineer-wallets-100-rem...

Fullstack Developer (Worldwide): https://careers.tether.io/o/senior-fullstack-developer-cosmi...

Product Manager (QVAC)(Worldwide): https://careers.tether.io/o/technical-product-manager-qvac-1...

Product Manager (Hadron)(Worldwide): https://careers.tether.io/o/technical-product-manager-hadron...

Product Manager (CosmicAC)(Worldwide): https://careers.tether.io/o/senior-technical-product-manager...

Deya | Software Engineer (AI x Healthcare) | NYC (Hybrid) | Full-Time

Most AI in healthcare is being built in the wrong place.

Everyone is chasing scribes and diagnostics. Almost no one is building the longitudinal data layer, the system that captures what actually happens to patients over time.

That’s the real moat. We’re building it for eye care.

Deya is an AI platform that sits between doctor and patient, capturing symptoms, treatments, outcomes, and ocular images over time to enable continuous care.

We’re already piloting with eye doctors and collecting real patient data, including the largest dataset of eye images captured on smartphones.

What you’ll do:

- Build core product + infrastructure from 0→1

- Work across full stack, AI systems (LLMs + vision), and data pipelines

- Help define the architecture of a longitudinal healthcare data layer

Who you are:

- Full-stack engineer (backend / full stack; AI experience a plus)

- Wants ownership and to build from first principles

- Interested in healthcare, data, and real-world impact

Why this is interesting:

- Greenfield system with real-world data + distribution

- Direct access to clinical workflows and outcomes

- Small, high-ownership team

NYC-based, Hybrid.

Apply: https://deya.health/careers/software-engineer-ai-x-healthcar...

Chestnut | Product Engineers (Backend / Full-Stack) | SF + Seattle (Hybrid) | https://jobs.ashbyhq.com/Chestnut

Chestnut builds the systems insurance carriers actually run their distribution business on. We replace spreadsheets, legacy vendor systems, and manual processes with real-time data, deterministic workflows, and AI-assisted tooling.

This is end-to-end product engineering.

You won’t just write APIs. You’ll design schemas, build backend logic, ship UI, deploy to production, and handle the sharp edges that show up with real customers. The problems are messy and state-heavy: payouts that must reconcile with finance, onboarding flows with regulatory constraints, dynamic hierarchies, retries, chargebacks, partial failures.

We care a lot about correctness. These systems move real money and cannot drift.

Stack: Go, TypeScript/React, Postgres, Temporal, Kubernetes, AWS

We use AI heavily in our workflow — for drafting, refactoring, test generation, and exploring solutions. We expect engineers to use it aggressively. We also expect you to understand what it’s doing, spot when it’s wrong, and maintain strong fundamentals. Taste matters.

You’ll likely thrive here if you: - Have 3–6 years building real product systems - Are strong in at least one typed language and comfortable picking up others - Enjoy owning features end-to-end - Think in terms of invariants, edge cases, and failure modes - Like shipping quickly but cleanly - Want to build systems that operate in production, not demos

We’re a small, high-agency team. You’ll have meaningful ownership and direct impact on customers.

Hybrid in SF and Seattle.

Questions or want to sanity-check fit: nick [at] chestnutfi [dot] com

NC Farm Bureau | Actuarial Data Scientist | Raleigh, NC (hybrid) | Full-time

We're seeking someone skilled in R and SAS programming, with heavy emphasis on predictive modeling (GLMs and GBMs mostly). SQL and data analysis skills are important, as is being a good problem solver who doesn't shy away from a challenge. Our machine learning/analytics program is still in it's infancy, so if you enjoy building from scratch, architecting workflows, and making a tangible impact - this role is for you. Hybrid work schedule after training period (3 days in office, 2 days remote).

https://www.ncfbins.com/career/3M9RpVXKjLKWDlLoxycNS8

Full-Stack Engineer (Python / React) , Remote

We’re working on building production AI systems , not demos ,focused on real-world workflows, data pipelines, and integrating LLM-based systems into usable products.

Stack: - Python (FastAPI) - React / TypeScript - AWS / PostgreSQL

Work includes: - designing backend systems and APIs - building and scaling LLM workflows (agents, pipelines, RAG) - handling real-world issues like latency, reliability, and hallucination control - integrating AI into product experiences end-to-end

Looking for engineers who: - have built production systems (not just prototypes) - are strong on backend design and data flow - have experience with AI/LLM systems in real use cases

Remote, async-friendly, with some overlap with US timezones preferred.

If interested, apply here: https://lnkd.in/dbiCSZhW

Better Stack | https://betterstack.com/ | /^Full-?stack Engineer$/i | Remote (North America & Europe)

We are software builders at :heart: CEO is a software engineer, COO is a software engineer, and you guessed it, CTO is an engineer, too. We are engineers, making the tools we always wanted. If you love building amazing software, you're at the right address.

We are looking for software engineers who, given enough time, could build Better Stack on their own = looking for full-stack product engineer generalists to help us create high-quality software with exceptional UX, end-to-end.

Apply at https://betterstack.com/careers/fullstack-engineer

How we operate: https://betterstack.com/careers – https://betterstack.com/careers/engineering – https://juraj.blog/

AI engineer and Fullstack Engineer We are vysr GmbH, an early-stage startup on a mission to reinvent performance management for asset‑intensive industries. Using AI‑powered performance mining, we identify improvement potential, recommend high‑impact actions, and help organizations run asset management in a strategic, value‑driven way.

We're continuing building the platform to grow post MVP — and we’re looking for an engineers who want to build the application further

Your Responsibilities (AI engineer)

Develop, train, and optimize machine learning models for performance analysis, forecasting, and automated recommendations Build scalable AI services that integrate seamlessly with our cloud‑native backend Collaborate on the design of data pipelines and feature engineering processes Work with structured and unstructured data from enterprise systems and operational sources

Influence architectural decisions for our AI stack, from model serving to real‑time inference

Your Responsibilities (fullstack engineer) Build and scale frontend and backend systems from scratch Develop modern, responsive user interfaces using React, Tailwind CSS, or Material UI Implement REST and GraphQL APIs and integrate with complex enterprise systems such as SAP S/4HANA Design and maintain data pipelines and database architectures (e.g., PostgreSQL, Snowflake) Build real‑time features using WebSockets or Server‑Sent Events (SSE) Implement secure and scalable authentication and authorization (e.g., OAuth2, JWT, SSO)

Location: Onsite in Munich or Berlin Contact: steffen@vysr.io LinkedIn: www.linkedin.com/in/steffen-medele

Rover | Barcelona, Spain & Seattle, USA | Full-time Rover is the world’s largest online marketplace for pet care. We connect millions of pet parents with trusted sitters and walkers, and we’re building a global platform that combines technology, community, and love for animals. With offices in Seattle, Barcelona, and beyond, we’re scaling an engineering culture focused on high-quality code, data-driven product decisions, and customer empathy. Open Roles:

Senior Product Analyst (Seattle) Lead Business Intelligence Analyst (Barcelona) Lead Data Analyst - Marketing (Barcelona) Lead Data Analyst - Product Analytics (Barcelona) Manager, Product Analytics (Barcelona) Senior Product Analyst (Barcelona)

Apply: https://www.rover.com/careers/

Trustle | Customer Success Engineer | Remote (US) | Full-time | Pre-Series A

We enforce Zero Standing Privileges across cloud and SaaS — AWS, GCP, Azure, Snowflake, Okta, GitHub, and more. Access is requested just-in-time and disappears when the job is done. We are a small team and AI is core to how we work.

This role sits between customers, the CEO, and engineering. You'll build real multi-cloud demo environments (not toy setups), run technical sales conversations, own customer onboarding, and create technical content grounded in actual depth. When you find a product problem, you'll file it and often see it fixed the same week.

You should have: Comfort scripting and hitting APIs to automate your own work Basic cloud familiarity (AWS, GCP, or Azure) — you know what a role and a service account are

Experience in customer-facing technical conversations A habit of publishing: blog, GitHub, videos, etc

Bonus: IAM/cloud security background, experience with agentic AI/LLM workflows, GCP stack (GKE, Cloud SQL, Cloud Run)

Pre-Series A means your work directly shapes product and GTM. Cloud access management is one of the fastest-growing problems in security — this is a good place to build expertise at the center of it. Interested? Contact us careers (at) trustle.com | https://trustle.com