Jobs Node.js

Hi! We are looking for a Senior Node.js Backend Developer to join our pack at SharksCode 🦈💙
 SharksCode is a Ukrainian IT company that develops high-tech software solutions and B2B platforms, particularly in the iGaming industry.
 We are looking for a Senior Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.

We expect that you:
– Have 4+ years of commercial experience with Node.js development.
– Have experience developing REST APIs and/or GraphQL services.
– Have strong proficiency in TypeScript.
– Have hands-on experience with MySQL or PostgreSQL.
– Have experience integrating third-party APIs and services.
– Have experience working with message queues (RabbitMQ, Kafka, or similar).
– Understand distributed systems architecture.
– Have experience using Redis for caching or Pub/Sub mechanisms.

Your future responsibilities:
– Design and develop backend services and product functionality.
– Build and maintain integrations with third-party financial and technical services.
– Develop public payment APIs and internal microservices.
– Participate in technical discussions and architecture decisions related to platform development.
– Ensure high code quality and follow engineering best practices.
– Share knowledge and contribute to the development culture within the team.

Nice to have:
– Experience working with high-load systems, especially with live or real-time data.
– Experience writing automated tests (Unit, Integration, E2E).
– Experience with WebSocket, gRPC, or other real-time technologies.
– Knowledge of architectural patterns such as CQRS, Event Sourcing, or DDD.
– Experience with Docker, Kubernetes, or CI/CD pipelines.
– Experience working in the iGaming or betting industry.

Interview stages:
🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.

We offer:
🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

Job Description

• 3+ years of professional software engineering experience
• Strong experience with Node.js and backend system design and development
• Experience with microservices and containerization technologies such as Docker and Kubernetes
• Experience with cloud platforms such as AWS, GCP, or Azure
• Experience working with databases such as PostgreSQL and caching systems such as Redis
• Experience with asynchronous job processing technologies such as BullMQ or similar tools
• Experience building, supporting, and maintaining backend services in production
• Experience working with distributed systems or complex backend services
• Willingness to participate in on-call support
• Strong sense of ownership, responsibility, and communication skills
• Familiarity with workflow orchestration platforms such as Temporal is a plus
• Experience with large-scale data processing is a plus
• Experience in cybersecurity companies or working with security-related products is a plus
• Experience in designing and implementing core algorithms is a plus

Job Responsibilities

• Participate in the full development lifecycle, from technical design to production support
• Design, develop, and maintain scalable backend services using TypeScript and Node.js
• Work with databases, caching systems, message queues, and cloud environments
• Contribute to microservices-based backend architecture and implementation
• Support large-scale data processing and backend integrations
• Collaborate with security researchers, DevOps teams, product engineers, and other backend developers
• Participate in code reviews, technical discussions, and engineering quality improvements
• Support production stability, reliability, and on-call activities when needed

Department/Project Description

Customer is a dynamic seed-stage startup, backed by seed funding from top-tier venture capital firms and industry leaders. The company has already secured partnerships with Fortune 500 companies, which demonstrates strong market trust and confidence in its vision.

The project is focused on building backend services for a security-related product that helps engineering and security teams identify, analyze, and address vulnerabilities in modern software environments.

The role is focused on hands-on backend development, working with cloud-native services, microservices, databases, message queues, and distributed backend systems.

Skill Category

JavaScript

Keyskills - Must Have

• Node.Js
• PostgreSQL
• Docker
• Kubernetes
• AWS
• Azure
• Redis

Keyskills - Nice to Have

• Product Cybersecurity

AttachmentsNo Attachments.

We are hiring a Senior Full Stack Engineer to join a fast-growing Web3 security startup building real-time risk detection and threat prevention infrastructure for blockchain ecosystems. The platform processes billions of blockchain events across multiple chains, using big data, AI, and advanced monitoring systems to prevent exploits before they happen. This is a high-impact R&D role in the Herzliya office, focused on owning full product flows end-to-end across backend and frontend systems.

Details

Location: Herzliya 

Employment Type: Full-Time Remote 

Experience Level: Senior

Industry: Web3 / Blockchain / Cybersecurity

Tech Stack: Python, NestJS / Node.js, React

Cloud: AWS

Role Overview

As a Senior Full Stack Engineer, you will:

Own major features end-to-end (backend + frontend)

Contribute to system architecture and long-term product vision

Work closely with Product and Design

Help shape engineering standards in an early-stage product environment

Build scalable, high-performance systems handling real-time blockchain data

The first hire is especially critical — expectations go beyond simply matching the JD.

Key Responsibilities

Develop backend services using Node.js (NestJS) and/or Python

Build high-quality frontend components using React

Architect and maintain scalable systems processing blockchain data

Contribute to CI/CD pipelines and cloud deployment workflows

Collaborate cross-functionally with Product and Design

Write clean, maintainable, production-grade code

Use AI tools productively to improve development velocity

Requirements

B.Sc. in Computer Science or equivalent

6+ years of hands-on experience with Node.js and React

Strong React expertise (deep knowledge expected)

Experience with AWS or similar cloud platforms

Experience working with CI/CD pipelines

Strong Git workflow proficiency

Excellent English communication

Strong technical depth — able to go deep in architecture discussions

Independent problem solver with “can-do-everything” mindset

Very Important - Previous Web3 / blockchain experience (highly valued, especially for the first hire)

Experience working with smart contracts, on-chain data, indexing, or blockchain event monitoring

Comfort working in startup environments

Nice to Have

Experience with Python

Experience working closely with Product and Design

Experience in fast-scaling startups

Practical use of AI development tools (Copilot, Claude, etc.)

About the Role:

We are looking for a Senior Backend Engineer to own a risk intelligence and B2B delivery platform at the core of a next-generation futures trading brokerage. This is a full-ownership role — you will design, build, maintain, and improve two tightly coupled services responsible for per-tenant risk execution and multi-protocol client delivery.

What You Will Work On:

• Per-tenant risk algorithm execution, liquidation workflows, and simulation configuration management;
• REST, gRPC, and WebSocket delivery to B2B clients with per-tenant webhook dispatch and outcome configuration;
• NATS JetStream integration: subscribing to risk alerts and position streams, managing backpressure and audit trail integrity;
• Coordination with upstream Rust services and a Python intelligence layer (classification models, surveillance);
• Evolving a unifying backend layer as the platform scales.

Required Skills:

• 5+ years of backend engineering with production systems at scale;
• Strong proficiency in NestJS / TypeScript and the Node.js ecosystem;
• Solid understanding of event-driven architecture (NATS JetStream, Kafka, or Pulsar);
• Experience designing multi-protocol APIs (REST, gRPC, WebSocket) in a B2B context;
• Familiarity with per-tenant SaaS patterns: isolation, config management, webhook delivery;
• Comfort working adjacent to Rust and Python services;
• PostgreSQL 17 + Timescale, Redis 7, S3 Object Lock, audit-grade data patterns (immutable logs, dual-write);
• Strong async written communication skills for a remote-first team.

Nice to Have:

• Background in fintech, trading infrastructure, or trading firm operations;
• Familiarity with pre-trade risk concepts: margin limits, fat finger controls, liquidation sequencing;
• Prior work with colocation or latency-sensitive distributed systems.

Would you like to lead a healthtech/fintech product that integrates directly with U.S. insurance companies?
We’re looking for a Senior/Lead Software Engineer (Node.js, Angular, and .NET) with the potential to lead a team
Remote + Top salary
Let’s discuss the details?

Main Responsibilities

– Develop and maintain features using Angular and Node.js (Express).

– Contribute to backend services and system architecture where applicable.

– Strengthen the team’s backend expertise and engineering maturity.

– Collaborate with engineering and ETL teams on integrations and data-related workflows.

– Participate in architecture discussions, code reviews, and technical decision-making.

– Identify opportunities to improve system scalability, reliability, and maintainability.

– Share knowledge and support other engineers when needed.

Mandatory Requirements

– 5+ years of professional software development experience.

– Strong experience in backend development.

– Hands-on experience with Node.js and Angular.

– Previous or current experience with .NET / C#.

– Experience designing and implementing backend services or APIs.

– Strong problem-solving skills and the ability to work with complex systems.

-Upper-Intermediate English (B2+) or higher.

– Proactive mindset and ability to take ownership of technical solutions.

Will be a plus

– Experience with AWS or other cloud platforms

– Experience working with healthcare systems or regulated environments

– Experience with SQL and/or NoSQL databases (e.g., MySQL, MongoDB)

– Mentorship or technical leadership experience

We offer

– Projects with a modern JS stack (React.js, React Native, Vue.js, Angular, Node.js)

– Work entirely remotely or in our office (Lviv, Kyiv or Krakow).

– Wellness: Medical insurance/sports compensation/ health check-up+flu vaccination at your choice

– Paid vacations and sick leaves, additional days off, relocation bonus

– Education: regular tech talks, educational courses, paid certifications, English classes

– One of the best IT employers in Lviv (or IT service companies in Ukraine) based on DOU rating.

About the role and client:
We’re looking for a talented and detail-oriented Node.js/AI engineer with strong experience in AI and Node development. You'll work with the product team to build AI assisted solutions.

Responsibilities:
- Integrate AI services (LLMs - classification systems, zero-shot, text generation, etc) into new and existing application architectures
- Adjust, refine, and version AI prompts and workflows to improve accuracy, reliability, and real-world performance in production systems
- Collaborate with designers, peers, and management to deliver consistent user flows and experiences
- Thoroughly test and debug code, participate in code reviews, provide documentation, and ensure systems meet quality standards

Requirements:
- At least 5+ years of experience as a full-stack engineer/Back-end engineer;
- Hands-on experience integrating AI or ML services into applications, including prompt design and iteration for LLM-based systems;
- A thorough understanding of how model parameters change output;
- Experience integrating third party APIs;
- Strong proficiency with Node.js, Express, etc and building RESTful and event-driven backend services;
- Comfortable working across multiple codebases and projects simultaneously;
- Experience with databases (primarily SQL) and data modeling for real-world applications;
- Attention to detail and strong testing experience.

Nice-to-Have:
- Knowledge of current AI models/services and their tradeoffs and advanced NLP techniques;
- Experience fine tuning models and building advanced chat bots;
- Familiarity with automated, testing frameworks (e.g., Jest, Cypress);
- Experience with monitoring, logging, and production debugging.

What the client offers:
- Competitive salary + performance bonuses;
- Remote‑first, outcome‑driven culture (potential for hybrid in Kyiv);
- Direct access to leadership, fast decisions, zero corporate layers;
- Opportunity to build and lead the AI function as we scale.

We are building a talent pool of Web3 Backend Developers with EVM expertise for upcoming outstaff projects with international clients 🚀.
 

This is part of our candidate pipeline — there is no specific project at the moment, but once a suitable opportunity becomes available, you'll be matched based on your skills and experience.
 

We're looking for developers who work with Solidity and Node.js / NestJS, understand DeFi protocol logic, and can build reliable on-chain and off-chain infrastructure for EVM-based products.

 

🛠️ Key Responsibilities

🔹 Write, test, and deploy Solidity smart contracts (ERC-20, ERC-721, custom protocols)

🔹 Integrate and build on top of DeFi protocols: Uniswap, Aave, Lido, Chainlink

🔹 Use OpenZeppelin standards and secure contract patterns

🔹 Build off-chain backend services using Node.js / NestJS

🔹 Interact with contracts via ethers.js or viem

🔹 Use Hardhat or Foundry for development, testing, and deployment

🔹 Write unit and integration tests for smart contracts

🔹 Communicate directly with international clients in English

📋 Requirements

🔹 2+ years of commercial experience in Web3/EVM development

🔹 Solid hands-on experience with Solidity

🔹 Proficiency in Node.js / NestJS

🔹 Experience with ethers.js or viem

🔹 Familiarity with Hardhat or Foundry

🔹 Knowledge of DeFi protocols: Uniswap, Aave, Lido, Chainlink

🔹 Understanding of OpenZeppelin contract standards

🔹 English: B2+

🔹 Ability to work independently

✨ Nice-to-Haves

🔹 Familiarity with Layer 2 networks (Arbitrum, Optimism, Base)

🔹 Mainnet deployment experience with high-value contracts

🔹 Multi-sig setup (Gnosis Safe)

🌱 Why Join Our Talent Pool?

🔹 Real Web3 Projects — production-grade smart contracts and backend systems

🔹 International Clients — teams across Europe and North America

🔹 Remote & Flexible — outstaff format, async-friendly

🔹 Blockchain-First Team — we speak the same language

🔹 Fast Matching — when the right project appears, we move quickly

✨ Why This Is a Great Opportunity

🔹 Real-world exposure — every project is different: different chains, different protocols, different challenges

🔹 Outstaff done right — we stay involved, support you throughout the engagement, and match you only where your stack truly fits

🔹 Keep growing — instead of running out of things to do at one company, you move to the next challenge

📬 What Happens After You Apply

🔹 Our team reviews your profile within a few business days

🔹 If there's a good fit, we'll schedule a brief intro call — to learn about your background, stack, and what you're looking for

🔹 After the call, you'll join our talent pool and we'll reach out proactively once a matching project comes up

⚠️ Important

🔹 This is a talent pool position (pipeline)

🔹 No specific project at this moment

🔹 You'll be contacted once a suitable opportunity becomes available

At FuturiX Solutions, we connect skilled blockchain engineers with international Web3 clients — matching you to projects where your expertise matters most 🌐⚙️

🟢 At Dev.Pro, we work on projects that impact millions of people around the world — but we know it’s the people behind the tech who make it all happen. We truly value what makes each person unique and are building a workplace that’s inclusive, friendly, and supportive.

We invite a Senior Software Engineer with strong Node.js expertise and solid AWS knowledge to join our team. You’ll work with a trusted leader in the Point-of-Sale industry with over 100,000 global installations. In this role, you’ll contribute to our client’s new initiative focused on creating data mapping between diverse menu order systems and integrating two distinct APIs to ensure seamless and accurate data transfer.

🟩 What’s in it for you:

• Collaborate on a high-load, technically challenging backend project, expanding your expertise in API integration, data mapping, and data transformation
• Contribute to a global tech platform offering robust solutions for the restaurant and food service industry
• Influence technical best practices and mentor engineers, promoting a culture of quality and continuous improvement

✅ Is that you?

• 4+ years of commercial backend development experience with deep expertise in Node.js and TypeScript in production environments
• 2-3+ years of AWS experience (EC2, ECS, Lambda, SQS/SNS, CloudWatch, etc.)
• Solid experience with MongoDB
• Proven experience designing, building, and maintaining RESTful APIs
• Strong understanding of backend architecture and service design
• Experience writing unit and integration tests
• Experience with CI/CD pipelines and automated deployments
• Strong ownership mindset and ability to work independently, resolve complex issues, and deliver solutions
• Excellent communication and cross-functional collaboration skills
• Upper-Intermediate+ English level

Desirable:

• Experience mentoring or providing technical guidance to engineers

🧩Key responsibilities and your contribution

In this role, you’ll contribute to the design, development, and continuous improvement of high-loaded backend systems and services, ensuring technical quality and delivering bullet-proof solutions.

• Design, build, and maintain high-loaded backend systems and APIs using Node.js and AWS
• Develop new backend features and enhancements for production systems
• Support and troubleshoot production systems to ensure reliability and performance
• Identify and reduce technical debt and implement improvements to maintain code quality and reliability
• Write and maintain unit and integration tests to ensure code quality
• Collaborate with cross-functional teams to define requirements and deliver bullet-proof solutions
• Contribute to the continuous improvement of backend architecture and development practices
• Create and maintain clear, organized development documentation

🎾 What’s working at Dev.Pro like?

✔️ 30 paid days off per year — take them whenever you want for vacation, holidays, or personal time
✔️ 5 paid sick days, up to 60 days of medical leave, and 6 paid days off per year for major family events like weddings, funerals, or the birth of a child
✔️ Partially covered health insurance after the probation, plus a wellness bonus for gym memberships, sports nutrition, and similar needs after 6 months
✔️ Grow your skills with English lessons, online training, conferences, and the option to explore new career paths

Our next steps:

✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Internal interview — ✅ Offer

About the Product

Connact is a German white-label community platform that builds custom iOS/Android + Web apps for associations, clubs, unions, and enterprises. It centralizes communication and engagement with features like news feeds, events, group chats, DMs, documents, member directory & map, CRM/email integrations, and push notifications—positioned as GDPR-compliant and meant to replace scattered channels (mail, socials, WhatsApp).

Schedule: flexible within 09:00–19:00 (EET time)
Start: Asap
Duration: Long-term cooperation
 

About the Role

We’re hiring a Node.js Backend Engineer to ship new features, refactor critical parts of the system for better performance and reliability, and resolve bugs efficiently.

This is a backend-first role, and we’re looking for engineers who are most confident and experienced on the backend side. You may also be a full-stack developer, but in that case, we will review your profile only if your experience shows a strong backend focus.
 

Our Stack (from the codebase)

• Runtime/Frameworks: Node.js, Express, NestJS
• DB/Cache/Queue: MongoDB (Mongoose), Redis, BullMQ
• Payments: Stripe, iOS/Android payments
• Localization & Feeds: i18next
• Monitoring: Grafana, Prometheus, Loki
   

MUST (hard requirements)

• 2+ years of production expirience with Node.js/Express. Typescript.
• Strong MongoDB/Mongoose experience (indexes, aggregation, migrations).
• Expirience working with BullMQ or similar.
• Fluent Ukrainian, English: B1 or higher.
• Docker (containerizing services, local dev).
• Expirience with AI coding tools (Claude or etc.)
   

Nice to Have

• React basics.
• Monitoring expirience(Grafana dashboards; Prometheus metrics; Loki logging).
• Stripe or other payment integrations; Apple receipt verification etc.
• WebSockets.

AWS S3 or similar expirience.

What’s The Process

The hiring process is fast and straightforward: a short pre-screening interview (10–20 minutes), a technical interview (up to 1 hour), and a brief call with the CEO (10–15 minutes) to discuss any remaining questions — followed by an offer.
 

A few practical details about the cooperation

To make sure everything is transparent from the start, here are a few important points about how this arrangement works:

1. Invoicing and taxes
   Your invoice should reflect the gross amount, and tax, accounting, and any related administrative matters would be managed on your side. We do not reimburse these costs separately. On our side, we aim to keep payments simple and flexible — we can pay via IBAN to the bank account of your choice, with no specific banking restrictions.
2. Time off and benefits
   As this is a contractor-style arrangement, it does not include paid time off, gym allowances, or other employee benefits. That said, we try to stay flexible, and in most cases it is easy to arrange unpaid time off whenever needed with prior notice.
    

How to Apply

Send a short note with next info:

• Your start date and salary expectations.
• CV
• Can add any fact about you.

We are looking for a Software Engineer with strong backend expertise to strengthen our engineering team at a successful web project from the USA.

As a Software Engineer, you will contribute to building and enhancing the platform within a collaborative engineering team. While the current stack includes Angular and Node.js, the strategic goal is to expand backend capabilities and strengthen collaboration with engineering and ETL teams.

Depending on project priorities, you may initially focus on Angular/Node.js features, while gradually contributing more to backend services and integrations, where .NET/C# experience will be valuable. You should be comfortable working across the stack when needed.

Our ideal candidate:

• Is comfortable working across both frontend and backend when needed
• Brings strong backend engineering experience
• Can help increase the technical seniority of the team
• Is proactive and capable of contributing to technical direction and system design
• Demonstrates strong ownership and problem-solving skills
• Is collaborative, comfortable working in ambiguous environments, able to mentor others, and raise the overall technical maturity of the team

Requirements

Must have

• 5+ years of professional software development experience.
• Strong experience in backend development.
• Hands-on experience with Node.js and Angular.
• Previous or current experience with .NET / C#.
• Experience designing and implementing backend services or APIs.
• Strong problem-solving skills and the ability to work with complex systems.
• Upper-Intermediate English (B2+) or higher.
• Proactive mindset and ability to take ownership of technical solutions.

Will be a plus

• Experience with AWS or other cloud platforms
• Experience working with healthcare systems or regulated environments
• Experience with SQL and/or NoSQL databases (e.g., MySQL, MongoDB)
• Mentorship or technical leadership experience

Responsibilities

• Develop and maintain features using Angular and Node.js (Express).
• Contribute to backend services and system architecture where applicable.
• Strengthen the team's backend expertise and engineering maturity.
• Collaborate with engineering and ETL teams on integrations and data-related workflows.
• Participate in architecture discussions, code reviews, and technical decision-making.
• Identify opportunities to improve system scalability, reliability, and maintainability.
• Share knowledge and support other engineers when needed.

About Project

Our client is a Software company from the USA.

Product

This platform is dedicated to ensuring payment integrity for health payers. Our project focuses on creating and implementing cutting-edge technology solutions to tackle current and future challenges in the healthcare industry for health plans. By bringing together payers, providers, and business partners on one technology platform, we aim to facilitate transparent communication and support collaboration.

Stage

Active phase of development

Project team

Existing team on the client side. We work with the US team (Eastern and Central time zones) — around 10 people. Our team is 17 people (9 MEAN stack developers, 8 QA, 1 PM)

Project Technologies

MEAN (MongoDB, Express. js, Angular and Node.js)

Work schedule

Full-time working day (flexible hours), possibility to work remotely or visit our offices in Lviv, Kyiv or Krakow.

Interview Stages

1-st stage — Call with Recruiter (30 minutes)
2-nd stage — Interview with our Senior Engineer (1 hour)
3-rd stage — Client interview

About Us
Scrambly is one of the fastest-growing adtech startups in the world, featured in the AppsFlyer Performance Index and Singular ROI Index in just 3.5 years.

We’re growing 250%+ YoY across revenue, team, product, and technology — fully bootstrapped and profitable.

We’re building the future of app discovery: a reward-powered alternative to the App Store and Google Play. Our loyalty-driven ecosystem connects millions of users with the world’s top apps and delivers unmatched, ROI-focused growth for mobile advertisers.

Our mission is to build a true alternative to traditional app stores — fueled by rewards and data — and create a new, performance-first growth engine for mobile app advertisers.

About the Role
We are looking for a Senior Backend Engineer to join the team building the core systems behind Scrambly. In this role, you will work across two key areas: user-facing product systems, solving complex scalability challenges for a platform serving millions of users globally; and the internal platform, covering admin systems, tooling, and back-office automation that power our operations team.

Your focus will be on writing robust, high-performance code and bridging the gap between product requirements and technical reality. You will work within a modern tech stack to ensure our systems remain fast, reliable, and easy to maintain as we grow.

Key Responsibilities

• Design & Implementation
  • Design, build, and maintain high-performance, scalable backend services and APIs using Node.js (NestJS)
  • Write clean, maintainable, and testable code that serves as a benchmark for the team
  • Ensure seamless integration between backend services and frontend applications
• Architecture & Technical Strategy
  • Propose and implement architectural improvements for core systems
  • Design complex features with a focus on long-term scalability, extensibility, and maintainability
  • Apply best practices for distributed systems and RESTful API design
• Mentorship & Code Quality
  • Champion high code quality and engineering best practices across the team
  • Mentor other engineers through constructive code reviews, technical guidance, and pair programming
  • Foster a culture of technical curiosity and continuous improvement
• Performance & Infrastructure
  • Monitor system performance, identify bottlenecks, and proactively resolve reliability issues
  • Collaborate with DevOps to ensure smooth CI/CD pipelines, deployments, and infrastructure reliability
  • Work with containerization and orchestration tools to manage application lifecycles
• Cross-functional Collaboration
  • Work closely with Product, Design, Frontend, and QA teams to deliver high-quality features
  • Translate product requirements into robust technical specifications
  • Communicate technical constraints and trade-offs clearly to non-technical stakeholders

Requirements

• 5+ years of software engineering experience, with a strong focus on backend development
• Strong proficiency in Node.js and modern frameworks like NestJS
• Excellent system design skills and a solid understanding of backend architecture, RESTful APIs, and distributed systems
• Experience with cloud platforms (GCP preferred; AWS or Azure acceptable), containerization (Docker), and orchestration/IaC (Kubernetes, Terraform, Helm)
• Proficiency with relational (e.g., PostgreSQL), NoSQL (e.g., Redis) databases, and message queues (e.g., RabbitMQ, GCP Pub/Sub, Redis Pub/Sub)
• Hands-on experience with React, capable of implementing basic UI features for internal tools independently
• Strong communication and collaboration skills, comfortable working in a fast-paced team environment
• English: Upper-Intermediate or higher (B2/B2+, written and spoken). You need to be able to communicate clearly in English to work effectively in an international team and participate in architectural discussions

Nice to Have

• Experience in a B2C startup that has scaled to millions of users
• Basic proficiency in Go; able to read, write, and maintain basic Go services without starting to learn from scratch

What We Offer

• Work on systems where performance optimizations translate to immediate user impact for millions of users
• A culture of code reviews, knowledge sharing, and mentorship where the best idea wins
• A fast-paced environment where your code quickly translates into real user value
• We value the stability and value of what you ship, not just the number of lines of code
• Flexible, remote-friendly working environment
• 15 days of paid vacation
• 5 days of paid days off
• 5 days of paid sick leave
• Maternity/Paternity leave
• National holidays based on your country of stay

International product startup building next-generation AI-powered developer tools is looking for a Senior Backend Engineer (Node.js / TypeScript). The product combines AI generation, visual editing, and product structuring into a unified platform for building and scaling web applications. This role focuses on cloud infrastructure and distributed systems, with a high level of ownership in building a scalable backend foundation for an AI-driven product.

You’ll be joining a team where engineering excellence is the standard. We value clean, type-safe and tested code, continuously deployed on reliable infrastructure that we build. If you enjoy the challenge of creating a smart backbone for the next generation of web development tools, you’ll fit right in.

Core Responsibilities

• Platform Services and APIs: Design and develop a robust ecosystem of services using Node.js and TypeScript that handle complex project lifecycles and real-time synchronization. Full ownership of the platform APIs, documentation and client libraries.
• Infrastructure as Code (IaC): Maintain and scale our global footprint on modern clouds and services using Terraform. You will be responsible for ensuring our environment is reliable, secure, and optimized for performance.
• Database & State Management: Manage data persistence for high-concurrency environments. You’ll manage complex data and caching layers to ensure efficient data access including schema design and caching strategy.
• Distributed Systems: Build and maintain the orchestration layer that handles high-volume file operations, background jobs, and complex state transitions across the Dazl ecosystem.
• Security & Compliance: Implement rigorous security protocols, including IAM management, data encryption at rest/transit and secure API design.
• CI/CD & Observability: Own the deployment pipeline and monitoring stack. Improve our ability to detect, debug, and resolve production issues before they impact users.

Requirements

• Strong professional experience in backend development, advantage for team leading skills.
•  Expert-level TypeScript and Node.js (Async patterns, Streams, Performance tuning).
• Proven experience of managing CI/CD pipelines of production-grade systems on modern clouds - AWS/GCP/Azure. You should understand VPCs, IAM roles, and containerized deployment strategies using technologies like Terraform or Pulumi.
•  Proficiency in SQL (PostgreSQL/Aurora) and NoSQL (Mongo/DynamoDB/Redis).

Advantage: Familiarity with the unique challenges of building AI products, such as non-deterministic outputs and high-latency service integration.

Inception-1 is a product company that creates AI-driven B2C products designed to help people feel more connected and less alone. Our mission is to build meaningful digital experiences that blend technology with empathy and to prove that technology can be both human and transformative.

We’re looking for a Senior Product Engineer who combines strong engineering skills with product thinking. 

Have you ever wondered about solving real product cases instead of just coding and approving each idea with product-analytics-delivery-….?

We want you to be responsible for solving complex user’s problems – delivering ready-to-use features and final value to user (from ideation to deployment and analysis).

If you have technical strong technical background, AI evangelist mindset and own startup experience – you are already in.
 

Must-have skills:

• Proven ability to ship user-facing features end-to-end.
• Strong full-stack engineering background (Python, Node.js, React, JavaScript).
• Hands-on experience integrating LLMs / AI APIs.
• Hands-on experience with agentic engineering: practical use of AI agents (LLM-based tools, autonomous workflows, coding agents) in day-to-day development, including designing, orchestrating, and evaluating agent-driven workflows.
• Product development skills:
  • Strong grasp of product analytics;
  • Product features design and testing experience.
• Solid system design fundamentals.
   

Nice-to-have:

• Experience in mental health, wellbeing, or health-tech.
• Experience building consumer mobile apps.
• Experience working with experimentation frameworks
   

Key responsibilities for the first 6 months:

• Ship 15–20 meaningful product experiments.
• Implement agile but stable solutions for engaging conversational model, voice generation, interactive calls, etc.
• Improve retention and activation metrics.
• Design and maintain an experimentation framework (A/B testing, rapid iteration).
• Work as product, design, and research to turn insights into shipped features.
• Participate in user interviews and discovery sessions
   

What makes you successful in this role:

• You have a strong product mindset and take ownership from idea to impact.
• You’re comfortable working in ambiguity and early-stage environments.
• You have high emotional intelligence and empathy for users.
• You care not only about shipping fast, but about shipping the right thing.
   

What we offer:

• Flexible work schedule and remote-friendly culture.
• Online services of a corporate doctor, and after the probationary period — health insurance in Ukraine.
• 20 working days of paid vacation per year, unlimited sick leave.
• All equipment necessary for work.
• Compensation for the best courses on the market, corporate online meetups and lectures, a large library, business and management schools for employees.

Please note: due to the high volume of applications, we can only respond to candidates selected for the next stage. If you don’t hear from us within a week, please assume your application won’t be moving forward this time, and we’d love to see you apply for future roles!

Do you want to make a real, useful impact in a world full of soul-sucking jobs? We’re looking for a NodeJS Developer in an education domain company. AI-based, worldwide government contracts, and great conditions. The company raised notable investments.

We are seeking a skilled and experienced Backend Developer with at least 4 years of professional experience. The ideal candidate will have a strong background in backend development, a deep understanding of databases, and proficiency with modern cloud technologies. This role is suited for individuals who excel in a remote team environment and are passionate about creating robust, efficient backend solutions.

Main Responsibilities

– Develop and maintain scalable backend systems using Node.js

– Design and implement serverless architectures leveraging AWS services (Lambda, Cognito, DynamoDB, StepFunctions)

– Ensure efficient database design and query optimization

– Collaborate with frontend developers to integrate APIs with user-facing components

– Write clean, efficient, and well-documented code

– Conduct code reviews, troubleshoot issues, and optimize application performance

– Maintain clear and open communication in a remote team setting

Mandatory Requirements

– Minimum of 4 years of professional experience with backend development

– Strong proficiency in Node.js and JavaScript

– Expertise in AWS services (Lambda, Cognito, DynamoDB, StepFunctions)

– Strong understanding of database design and optimization

– Familiarity with version control systems

– Experience with Serverless framework

– Strong communication skills and ability to work effectively in a collaborative, remote team setting

– Detail-oriented with a passion for crafting high-quality code

Preferred Qualifications

– Frontend development experience with Angular is a strong plus

We offer

– Remote work

– Stable high salary

– A great team of like-minded people

– A package of holidays, sick leave, and public holidays

About the Role:

We are looking for a Senior Backend Engineer to own a risk intelligence and B2B delivery platform at the core of a next-generation futures trading brokerage. This is a full-ownership role — you will design, build, maintain, and improve two tightly coupled services responsible for per-tenant risk execution and multi-protocol client delivery.

What You Will Work On:

• Per-tenant risk algorithm execution, liquidation workflows, and simulation configuration management;
• REST, gRPC, and WebSocket delivery to B2B clients with per-tenant webhook dispatch and outcome configuration;
• NATS JetStream integration: subscribing to risk alerts and position streams, managing backpressure and audit trail integrity;
• Coordination with upstream Rust services and a Python intelligence layer (classification models, surveillance);
• Evolving a unifying backend layer as the platform scales.

Required Skills:

• 5+ years of backend engineering with production systems at scale;
• Strong proficiency in NestJS / TypeScript and the Node.js ecosystem;
• Solid understanding of event-driven architecture (NATS JetStream, Kafka, or Pulsar);
• Experience designing multi-protocol APIs (REST, gRPC, WebSocket) in a B2B context;
• Familiarity with per-tenant SaaS patterns: isolation, config management, webhook delivery;
• Comfort working adjacent to Rust and Python services;
• PostgreSQL 17 + Timescale, Redis 7, S3 Object Lock, audit-grade data patterns (immutable logs, dual-write);
• Strong async written communication skills for a remote-first team.

Nice to Have:

• Background in fintech, trading infrastructure, or trading firm operations;
• Familiarity with pre-trade risk concepts: margin limits, fat finger controls, liquidation sequencing;
• Prior work with colocation or latency-sensitive distributed systems.