Phonely | Senior Backend Engineer (Python) | San Francisco (Onsite) | Full-time

We’re building the future of voice AI for businesses, with a platform designed to make real-time agents easy to build, tune, and operate.

We’re looking for a senior backend engineer to work on core systems that drive live voice conversations in production. This is a hands-on role with a lot of ownership and a lot of Python.

What you’ll do

• Build Python-based state systems for real-time voice AI conversations

• Integrate multiple LLM providers (prompting, routing, tool calling, fallbacks)

• Write high-performance async Python (FastAPI, asyncio)

• Design and test resilient agent logic and microservices

• Operate and improve production systems with strong observability

What we’re looking for • 5+ years of Python experience, including async web services

• Experience with FastAPI, testing, and CI/CD

• Strong system design and security fundamentals

• Familiarity with LLMs, cloud infrastructure, AWS, and Kubernetes

Stack

Python, FastAPI, async microservices, AWS/GCP, Kubernetes, Redis, Firebase, Supabase, Datadog, SIP/voice APIs

Why Phonely

Small, intense team of builders. High ownership, fast pace, real impact. In-office 5 days/week in SF. Company-paid meals, great culture and periodic international work trips.

https://bookface.ycombinator.com/company/29645/jobs/87967

Lago (getlago.com) | Product & Engineering | Full-Time, Perm Hiring

Lago is the billing platform that gives teams full transparency, control and flexibility to manage and scale any pricing model. As the leading open-source billing platform, we empower businesses to build flexible pricing models and scale with confidence. We’ve raised over $22 million in funding from top-tier investors including Y Combinator and FirstMark, reflecting strong confidence in our vision and growth.

Open Roles: // Senior Backend Engineer (Remote Europe / LATAM) - Ruby, 5+ years of xp // Senior Infrastructure Engineer (Remote Europe) - AWS, K8s, Pulumi // Product Manager (Paris) - 4+ years of experience, B2B, Scale-up xp preferred // Product Designer (Paris) - 4+ years of experience, B2B, Scale-up xp preferred // Head of Engineering (Paris ideal, Remote France or UK possible) - 5+ years in Senior Leadership positions, xp of fast scaling teams. // Forward Deployed Engineer (Remote USA) - 5+ years of xp

Apply/Read more here: https://www.getlago.com/hiring

Radar Labs | Software Engineers (SRE, data platform, backend, full-stack, mobile) | Remote (US), NYC | Full Time | https://radar.com

- Radar is the geo-location dev tool

- Doing 1B+ API calls per day

- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).

- We're based in NYC with our HQ in Union Square and remote friendly (US)

Interesting things we're working on:

- HorizonDB, our Geospatial database written in Rust

- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband, other mobile sensors and ML.

- Extracting raw map data from satellite maps and the web leveraging ML and AI

- Anomaly detection to identify spoofed locations

- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time

- Multi-Region AWS K8s deployment, 99.99%+ availability

- Frontend tools to visualize and debug location data at scale

Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com

Connie Health | https://www.conniehealth.com | Multiple engineering roles | Hybrid (Boston, MA) | Full-time

Connie Health is a fast-growing startup on a mission to empower older Americans to make confident, worry-free healthcare decisions. Backed by leading investors such as Khosla Ventures and HealthQuest, we are building technology to transform the trillion dollar Medicare insurance industry, impacting the lives of 67 million people in the US. You will work at the intersection of the latest in applied AI/ML, software engineering, product, and infrastructure to build our best-in-class Medicare navigation and sales platform.

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We are looking to fill multiple positions on our rapidly growing engineering team, based out of Boston, MA:

Fullstack Engineer | $120k-$140k + equity | Responsibilities: Build the core tools that our Medicare agents rely on every day to serve customers efficiently and accurately | Tech stack: TypeScript, NestJS, Vue, Nuxt, Postgres, AWS, Docker + Kubernetes, Datadog

Senior Data Operations Analyst | $100k-$110k + equity | Responsibilities: Operations-heavy "data detective" role focused on the ensuring the quality of our core business data, investigating complex data discrepancies, identifying root causes, and implementing long-term fixes | Tech stack: SQL, Postgres, Redshift, Looker, Google Sheets

Senior Data Engineer | $140k-$160k + equity | Responsibilities: Architect, build, and scale the data platform and data pipelines that powers our analytics, operations, and AI-driven products | Tech stack: SQL, Postgres, Redshift, dbt, python, AWS, Airflow, Looker, Salesforce, Fivetran

Senior Backend Engineer | $140k-$160k + equity | Responsibilities: Own and evolve the core policy status tracking and commissions payment systems, powering financial reporting, policy lifecycle management, agent compensation, carrier reconciliation, and customer trust | Tech stack: TypeScript, NestJS, Postgres, AWS, Docker + Kubernetes, Salesforce, Datadog

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Apply: https://recruiting.paylocity.com/recruiting/jobs/All/28c82b8...

These are all hybrid positions in our Boston office near South Station, so local candidates only please. Unfortunately we are unable to do visa sponsorships at this time.

YakitOfisi | Senior Full-Stack Software Developer (backend-first) | REMOTE (Turkey)

YakitOfisi (yakıtofisi.com) builds software for the fuel / energy sector. We’re looking for a senior, backend-first full-stack engineer to own real-world, deterministic systems that run in production every day.

Tech: .NET, ASP.NET, EF Core, Hangfire, PostgreSQL, Redis, Linux, Nginx, AWS, Grafana/Loki, Flutter, IoT/serial communication.

Requirements:

- Senior-level, can run a full-stack project independently

- Strong backend (.NET), decent frontend

- Comfortable owning production systems

- Bachelor’s degree required (technopark)

Remote (Turkey, preferably Marmara region). Salary based on experience.

Apply: https://docs.google.com/forms/d/e/1FAIpQLSdGsIKBVRaOS0yZu1Rf...

Rasm Labs | Full-Stack Engineer (Angular/NestJS) + Senior Cloud Engineer (AWS) | REMOTE (EU-friendly) | Full-time / Contract

Rasm Labs is a small software studio building SaaS products and custom systems. No agency overhead, no PM layers just engineers shipping quality software.

Open roles

Full-Stack Engineer - Angular, TypeScript, NestJS, PostgreSQL - Own features end-to-end (frontend → backend → prod) - 4+ years experience, product-minded

Senior Cloud Engineer - AWS (ECS/EKS, Lambda, RDS, S3), Docker, Terraform - Infra, CI/CD, security, reliability - Senior-level production experience required

Location: REMOTE (Europe-friendly time zones) Type: Full-time or long-term contract

Apply: jobs@rasmlabs.com (Short intro + CV/LinkedIn/GitHub — we reply to all serious applicants)

Cosuno | Senior Full Stack Developer (TypeScript) / Senior AI Engineer – LLMs & Agents | Remote (EU) / Berlin | Full-time | https://www.cosuno.com

Cosuno is a fast-growing tech startup reshaping the construction industry with a digital platform for procurement. We use AI to analyze millions of price points, helping construction companies create bids based on real market data. We're looking to expand our team with creative minds who want to solve real-world problems and impact a massive industry. We are an open-minded, collaborative, and international team.

Currently, we're hiring for two key senior roles:

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Senior Full Stack Developer (TypeScript)

Location: Remote (EU) / Berlin

Stack: TypeScript, React, Node.js, Cypress, Kubernetes, AWS

Mission: Take full ownership of features, shaping both the frontend and backend of our product. You'll have the responsibility to extend and build upon our platform to make it more valuable, reliable, and maintainable. We value a trunk-based development workflow with daily releases, comprehensive end-to-end testing, and a solid CI/CD pipeline.

You have: 5+ years of hands-on engineering experience, substantial expertise in JavaScript/TypeScript, and experience with Node.js (React is a plus).

---

Senior AI Engineer – LLMs & Agents

Location: Remote (EU) / Berlin

Mission: You will build agentic workflows using state-of-the-art LLMs. Lead the technical development of an agent that helps construction professionals process, improve, and validate complex construction documents. A key part of your role will be establishing and enforcing MLOps and LLMops best practices.

You have: 5+ years of engineering experience, with at least one year working with LLMs. You possess strong Python skills, a proven track record of deploying containerized services (Docker, Kubernetes), and deep expertise in at least one of the following: deep learning (PyTorch, Transformers), ranking/matching algorithms, or LLMops (RAG, evals, fine-tuning).

Interested? To apply and for more detailed information, please see the full job descriptions on our careers page: https://www.cosuno.com/en/company

Prezly | Remote (Europe ±2h CET) | Full-time | https://www.prezly.com

We run a platform that handles story publishing, media delivery and newsroom workflows for hundreds of organizations, with millions of readers hitting it every month. PHP on backend (API's/app), TS/React on frontend.

Hiring: • Senior Backend Engineer (PHP, Symfony, PostgreSQL) • Full-Stack Engineer (React, TypeScript, PHP)

Why join Prezly? • Work on systems that deal with high traffic, large media libraries and evolving data models • Improve and modernize a long-lived PHP codebase without breaking production • Own features end-to-end: database → API → UI → production • Direct line to product and customers, no layers of PMs or process • Profitable, remote-first company with high autonomy

Stack: PHP (Symfony), PostgreSQL, React/TypeScript, Kubernetes on AWS. We actively use AI coding tools like Claude Code and Cursor.

Apply: https://careers.prezly.com

Blackshark AI | Software Engineers & Platform Engineer | Full-time | Austria or Remote EU Hours | VISA sponsorship available

We build geospatial AI infrastructure. Our platform lets analysts train custom object and change detection models on satellite/aerial/drone imagery in minutes, then reconstructs 3D terrain from those detections. We just shipped a planetary-scale simulation platform with Lockheed Martin powered by Unreal Engine.

If you want to work on distributed systems that run in a data center one day and an edge laptop the next, we have interesting problems. Our training and inference infrastructure is processing trillions of pixels and we deliver real world impact for our customers across defense, intelligence, and local governments.

Tech Stack: Python, Fast API, PyTorch, Postgres, Redis, Vue.js

Infrastructure Stack: Kubernetes & Docker, Linux, AWS & Azure, Azure DevOps, Terraform, ELK, Prometheus & Grafana, ArgoCD & Helm

Roles:

Software Engineer - Data Plane Team: https://jobs.eu.lever.co/blackshark/6110fedd-5cd8-40e5-ac11-...

Software Engineer - Machine Learning Team: https://jobs.eu.lever.co/blackshark/7c4b0833-790b-4490-b24a-...

Platform Engineer - Deployment Team: https://jobs.eu.lever.co/blackshark/56a85834-d986-4105-9cc8-...

or reach out to HM with questions at: 'eivanov@' + username[:-2] + '.' + username[-2:].lower()

Nango | Full-time | Remote (North America, LATAM, Europe) | https://nango.dev

Nango (YC W23) is a developer infrastructure company and the leading provider of API access for agents and apps. It enables AI applications to connect to the real world through integrations.

More than 250 paying customers rely on Nango today, including Replit, Mercor, and Exa. We are a YC-backed, multi-million ARR company with a team of 10 from AWS, Snyk, Netlify, Uber, Samsara.

We’re hiring for the following openings:

* Backend engineer

* Product engineer, Customers

* Product engineer, Growth

* Chief of Staff

* Developer Content Engineer

Find out more, and apply at: https://jobs.ashbyhq.com/Nango

Veho | ONSITE / HYBRID 3 days per week | NYC or Boston | No Visa | https://shipveho.com/careers

Hi there! At Veho, we don't sell software. We ship packages. Lots of them. We have all of the interesting problems that crop up when running twinned distributed systems in AWS and the real world. It's pretty great.

We're hiring staff-level folks (L4+) in NYC and Boston: Data Scientists, Data Engineers, Mobile Engineers, and Backend Engineers (typescript).

Personally, I'm hiring a Staff Data Engineer with the depth of experience to be a technical lead and mentor for the Data Platform team, while also shipping code. You will need to understand distributed data systems both intellectually and at an instinctive, emotional level. You should have Opinions about the wild boar book. You should probably also be comfortable writing and debugging English, SQL, and Python.

If that sounds like you, I really want you to apply for the Staff Data Engineer role on our career page. Our inbound applications are reviewed by humans.

With apologies that our first interaction requires this silliness: including one of the 7-digit numbers from the "ROS Calculator" on Veho's website in the appropriate box will heavily bias me towards believing you are a human being. That's more of an advantage than it may seem! It's worth the thirty seconds. It would also speed things along if you populate the "Location" field to confirm you are aware this is an in-office role.

Jurisphere.ai | Lead DevOps / SRE | Bangalore (Hybrid) | Full-time

Comp: ₹40–60L + ESOPs (flexible)

Exp: 6–12+ yrs

Jurisphere builds an enterprise Legal AI platform used by top law firms in India & the US.

We’re hiring our first SRE / Platform Engineer to own production reliability and act as the infra point-of-contact for enterprise clients.

You’ll own:

• Reliability, SLOs, on-call, incident response

• Kubernetes (multi-cloud + on-prem), GitOps, CI/CD

• Observability, DR (RPO/RTO), security & compliance

• Client-facing security & compliance discussions (IT checklists, audits)

Stack: Kubernetes, Terraform, ArgoCD, GCP/Azure/AWS, Prometheus/Grafana, Postgres, Redis, Temporal.

Not a YAML-only role, you’ll debug real systems and work on the backend code as needed.

If you're interested, email sumit@jurisphere.ai with infra you’ve owned end-to-end. More details here: https://docs.google.com/document/d/1x2WKM0iXlvUVDZXm4SQVr53s...

EnergyHub | Director of Engineering | Full-time | REMOTE (US)| Salary $225k

EnergyHub | Engineering Manager | Full-time | REMOTE (US)| Salary $195k

EnergyHub | Senior Engineer | Full-time | REMOTE (US)| Salary $170k

Apply for Director of Engineering here: https://grnh.se/4eq0bxsv2us

Apply for Engineering Manager here: https://grnh.se/jtfoq9qr2us

Apply for Senior Engineer here: https://grnh.se/rf88lxfk2us

See all our open roles and apply here: https://grnh.se/30f1ece22us

Want to work on helping to decarbonize the electric grid and transportation in the US? (the two biggest sectors for impact)

Want to do it at scale? (we control over 2.5 million devices across the US making up over 4 gigawatts of electrical load for utilities that service 1/3rd of the entire US population)

Come work with me building some of the largest VPPs (virtual power plants) on the planet at EnergyHub. (What's a VPP? See page two of https://live-energy-hub.pantheonsite.io/app/uploads/2026/01/... )

EnergyHub’s software makes it easy for millions of smart device owners to partner with their utility and help decarbonize the grid. Our platform lets consumers turn their smart thermostats, electric cars, EV chargers, batteries, and other products into virtual power plants that keep the grid stable and enable higher utilization of solar and wind power. You’ll be a part of building the tech that’s at the center of it all.

Tech stack includes: Java, Kotlin, React, Snowflake, dbt, AWS, Docker, Python, PostgreSQL

All roles are remote but if you like offices we have them in Brooklyn, NY and Burlington, VT.

Note that we can NOT sponsor visas at this time.

Kato | Senior Software Engineer | San Francisco, CA | ONSITE | Full-time Kato is building a compliance-first AI servicing platform for the $24B lending market. While others treat regulatory guardrails as an afterthought, we’ve built a regulatory rules system with an AI decision engine on top. Our first product is a Voice AI agent currently handling loan servicing calls for major fintechs like Bilt Rewards and Parafin.

We are backed by Pear VC and angels from Brex, Bridge, and Square. You’ll be our second engineering hire, working directly with our CTO (ex-Google/Brex EM) and CEO (ex-Goldman/Brex).

The Role: As an early hire, you’ll own mission-critical projects across the entire stack. You’ll lead the architecture of our real-time voice processing system, optimize LLM integrations for compliance-aware conversations, and build out our customer-facing dashboards.

Tech Stack:

Backend: Golang, PostgreSQL

Frontend: Next.js, TypeScript, React, Tailwind

Infra: AWS, Terraform, Kubernetes, Docker

AI/ML: LLMs, Speech-to-Text, Text-to-Speech

Requirements:

2-5 years of production software experience.

Strong API design and architectural thinking.

An "owner's mindset"—we are a small, high-intensity team where everyone drives product direction.

Experience with WebRTC, real-time audio, or FinTech is a plus but not required.

Location: San Francisco (4 days/week in-person).

To apply: https://jobs.ashbyhq.com/Pear-VC/214dc247-0778-485b-8a3d-067...

DoShare Labs | India | Locations : New Delhi, Bangalore, NY(US) , SF(US) ,Remote Positions we're hiring for : 1. Technical Liaison :

Requirements:

2+ Years of Working in Tech Experience | Good Communication Skills | Bachelors or Equivalent Degree

2. Infrastructure Engineer :

Requirements:

3+ Years of Experience as Infra Engineer | Stack - Python, Go, Kubernetes, GCP/AWS/Azure , Cloudflare

3. Project Lead (UI/UX) :

3 + Years of Project Development Experience | Good understanding of market requirements | A/B Testing | Engineer or similar degree

4. Customer Support Executives [English OR Hindi]

2 Years of Customer Support Experience | Speaking Skills | Ability to follow tasks at hand

5. Marketing Posts (3 Positions)

Experience with Marketing and Advertisement | Out-of-the-box Thinking Ability | Led or Organised Events

Note: Keep the position you're applying for in the title.

Apply via Mail : careers@doshare.me

Silkline | Senior Software Engineer | Seattle | ONSITE (5 days/week) | $150k-$220k + equity | https://silkline.ai

Modern hardware supply chains run on spreadsheets, email, and PDFs. It's like fax woke up in 2025. We're fixing this with an AI-first procurement platform for aerospace, defense, and nuclear manufacturing.

Our customers: Machina Labs, Astranis, K2 Space, Castelion, Antares, and more. They use us to manage suppliers, track $M+ in orders, automate RFQs, and stay ITAR-compliant. Every day of production delay costs $50k+—our platform keeps them moving.

The role: Own features end-to-end, build ERP integrations that sync POs and manufacturing data, real-time order tracking dashboards, and a user experience that people LOVE. Work directly with customers whose supply chains depend on what you ship.

Stack: TypeScript, React, Next.js, Hasura (GraphQL), PostgreSQL, Trigger.dev, AWS GovCloud, Pulumi, Elbow grease.

You: 5+ years shipping production systems, strong full-stack or frontend generalist who moves fast, thrive on customer feedback and direct impact, bonus: ERP integrations, B2B SaaS, or regulated industries

Traction: 5x'd customer count last year, $5M funding to date, landing massive defense/space logos. Small team shipping incredibly fast—you'll work directly with our founders (Isaac and myself).

Apply: https://jobs.gem.com/silkline/am9icG9zdDrLwsEQTKKa02Ut_F9kgz... Questions? brent@silkline.ai (mention HN)

Evervault | https://evervault.com | New York, London, Dublin, Remote | Full Time | Hybrid (3 days in office)

Evervault's mission is to make world-class data security effortless and pervasive. We use applied cryptography to secure the most sensitive data, in the most sensitive areas like payments, banking and healthcare. We build products to protect customer data with the latest advances in encryption and confidential computing, so our customers can minimize the headache of compliance and data security.

We are a small team (10 engineering, 25 overall) hiring across engineering, sales, marketing and finance for people who are passionate about building out our roadmap of products to protect companies from data breaches in a world where data has become gold.

Open roles:

  - Senior Software Engineer (Payments) 
  - Product Engineer 
  - Design Engineer 
  - Head of Finance & Ops

Apply here: https://evervault.com/jobs or ask me a question shane@

Hike Medical | Boston (ONSITE) | Senior+ Software Engineer

Hike Medical is reinventing musculoskeletal care, starting with feet. Our proprietary AI-vision platform turns a 30 second web based (yes, no sensors) foot scan into precision engineered, 3D-printed insoles that prevent pain before it starts. We're already protecting on-their-feet workforces at Fortune 50 leaders, major health systems, and middle America manufacturers. Fresh off a stealthy round with top tier VCs, we run a fast, no BS, execution first culture out of Boston’s Seaport as we sprint toward $100M ARR and standing with 10M Americans as they step into their shoes daily.

As a Senior Software Engineer, you’ll build and ship the core systems behind Hike’s AI healthcare platform. As the backbone of Hike's high-growth, mission-driven platform, you’ll design scalable services, implement production AI, and deliver user experiences that improve patient outcomes. From day one, you’ll have real autonomy and clear impact on transforming the US healthcare system.

What You'll Work On:

* Architect, build, and optimize high-performance, scalable systems that power AI-driven solutions.

* Design resilient, serverless architectures in a TypeScript and AWS environment.

* Develop developer-friendly APIs and SDKs that enable seamless integration across platforms.

* Build and refine high-speed data processing pipelines that drive clinical-grade AI insights.

Ideal Candidate Profile:

Technical Skills

* AWS & TypeScript Expert – Comfortable making infrastructure decisions, optimizing cloud deployments, and managing scalable architectures.

* Experience designing, building, and maintaining backend systems that power real-time, AI-driven applications.

* Strong experience in building and optimizing developer-facing SDKs and APIs. Skilled in real-time data processing pipelines and optimizing system performance at scale.

* A thoughtful approach to building secure, resilient, and fault-tolerant systems.

Helpful Characteristics

* Product-Minded Engineer – You think about how your work impacts real users.

* Strong Communicator – You clearly explain your ideas, challenge assumptions, and collaborate across engineering, AI, and product teams.

* Thrives in Collaboration – You push back, ask tough questions, and elevate the team.

* Driven to Ship – You want full control over your work, from architecture to deployment, and you’re eager to move fast.

* Mission-Focused – You’re not here to optimize ad clicks. You want to build technology that changes lives.

$150K – $225K • Offers Equity • $15k relocation bonus (if necessary)

Apply: https://jobs.ashbyhq.com/hike-medical/c5a39cb5-fdaa-457d-86d...

Staff / Principal Product, Backend, Distributed Systems Engineers - Artemis — NYC

Hiring 7+ yr Staff/Principal engineers to own exabyte ingestion, streaming/federated analytics, and AI-native detection (product + infra) at our Stealth AI-security startup (seed $15M).

Stack: Python/Node/Rust, React/TS, Kafka, ClickHouse, AWS.

Ship end-to-end: design → prod → detection stories that customers use daily.

Prefer experience at scale (Google/Meta/AWS/Abnormal/Wiz) - we have a super experienced technical team.

Email christina@goartemis.ai + with CV + one line on what you’d own - I’ll reply personally.

Jurata | Software Engineer (Frontend/Fullstack) | Zurich, Switzerland | ONSITE | Full-time Jurata is a LegalTech startup building an online one-stop shop for legal, accounting, and tax services. We help thousands of SMEs get fast, affordable access to professional support. Heavy focus on automation and AI. We're looking for versatile engineers who thrive in a TypeScript environment and enjoy owning features end-to-end. What you'll do:

Build and maintain Next.js frontends Migrate legacy apps from no-code tools (WeWeb/Retool) Deliver fullstack features (backend: Nest.js, Python) Own problems from idea through release and monitoring

Stack: TypeScript, Next.js, Nest.js, Python, MongoDB, Vercel, AWS Looking for:

TypeScript and Next.js experience Strong eye for design (you can build beautiful UIs without a Figma file) You actively use AI coding tools (Cursor, Windsurf, etc.) Builder mindset, comfortable working autonomously

Benefits: 25 vacation days, ESOP, free gym membership, team lunches, central Zurich office with snacks and drinks. EU/EFTA citizenship required (or willingness to relocate to Zurich). Apply: https://join.com/companies/jurata/15604453-fullstack-softwar... (mention HN)