Jobs Node.js

Metamindz is a UK-based IT software company providing fractional CTO services and building high-tier digital products. 

We are looking for a Senior Software Engineer to join a very early-stage, self-funded startup that is building a mobile-first product aimed at transforming how pet-care businesses(dog walking, pet sitting, training, etc.) operate day-to-day.

The product will help pet-care companies manage schedules, assign freelancers (dog walkers, sitters, trainers), handle invoices and receipts, and run their operations more efficiently - all from a single mobile app.

This position is for a strong, product-minded engineer that would be excited about building the first production version of the app.

Responsibilities:

• Build and ship the first version of a React Native mobile application from existing designs
• Implement core product features including scheduling, assignments, and basic operational workflows
• Develop and maintain a backend using NodeJS and TypeScript
• Work with Supabase or Firebase for authentication and real-time features
• Design and work with SQL databases, ensuring clean schemas and reliable data flows
• Handle app submissions and updates for App Store and Google Play
• Collaborate closely with founders and product stakeholders
• Use AI tools pragmatically to increase development speed and quality, while reviewing and owning the output
• Write clean, maintainable, and production-ready code with a strong sense of responsibility

Requirements:

• 4+ years of commercial experience with React Native
• Proven experience publishing apps to the App Store and Play Store
• 3+ years of commercial experience with NodeJS and TypeScript
• Hands-on experience with Supabase and/or Firebase
• Strong understanding of SQL databases and experience using ORMs
• Solid engineering fundamentals and ability to work independently
• Professional proficiency in English (written and spoken)
• Strong soft skills, clear communication, and ownership mindset
• Comfortable using AI as a productivity multiplier
   

Nice to Have:

• Experience working with very early-stage or lean startups
• Product-oriented mindset and ability to make pragmatic technical decisions
• Previous experience building MVPs or v1 products from scratch

What We Offer:

• Short-term contract engagement (3–4 months) with clear scope and ownership
• Fully remote work and flexible schedule
• Direct impact on a real product from day one
• Minimal process, no bureaucracy, no micromanagement
• Opportunity to shape the technical foundation of a growing product
• Competitive contract compensation, aligned with seniority and impact

How to apply:

Please send a short blurb about yourself and your favorite ice cream flavor (mine is cherry) :)

Our family-style company is looking for a strong Senior Full-Stack Software Engineer (8+ years). This is a long-term, full-time position at a well-funded cybersecurity startup.

About the Role

The startup has raised over $100M and is post-Series B. The role requires deep expertise in both frontend and backend development, with a strong emphasis on frontend ownership. Excellent frontend skills are a must-have. Day-to-day work includes building and owning features end-to-end, primarily using React (Typescript, MUI), Node.js (TypeScript), and Python.

On the backend, the engineer is expected to work at a high level with both Python and Node.js (TypeScript, NestJS). The role involves maintaining and developing new features across multiple services (Python and TypeScript-based), database schema design and changes (PostgreSQL), and working with Kafka and Redis.

You’ll work closely with developers plus Team Leads, and PMs in a highly collaborative, Agile environment. High ownership and the ability to mentor other developers are a must.

What you’ll do:

• Full-stack feature ownership:  Primarily focused on React UI development, including building clean, reusable components within the design system, well-structured custom hooks, and end-to-end backend/API delivery.
• Core implementation areas: CRUD flows, PostgreSQL database work and Schema changes with SQLAlchemy (Python) and TypeORM (NestJS).
• Production-grade engineering: monitoring, debugging, performance optimization, and handling incidents/issues in real environments.
• Architecture work: designing systems or significantly evolving existing architectures with clear trade-off thinking (performance, scalability, cost, and maintainability).

What We’re Looking For:

• Core Languages: React, Node.js (TypeScript), Python.
• Frontend: React, MUI, react-hook-form, react-query, Storybook, Playwright.
• Backend & API: Node.js (TypeScript), Python, NestJS, Redis, Kafka, AWS SQS & SNS, AWS S3.
• Database & Storage: PostgreSQL, SQLAlchemy, Nest Repositories and TypeORM.
• Testing Standards: PyTest, Vitest, Playwright.
• Infrastructure & DevOps: AWS, GitHub Actions, Docker, Docker Compose, CI/CD pipelines, Kubernetes.
• Strong understanding of scalable systems and software architecture.
• Ability to mentor professionally mid- level developers.
• Prior startup experience (will be a strong advantage).
• Ownership of features end-to-end.
• Strong communication skills.

• Advanced English proficiency.

   

Nice to have:

• Technical curiosity and interest in cybersecurity are a strong bonus.

   

What we offer:

• A really promising long-lasting project (you will be proud of yourself).
• Sane and polite, but effective management.
• The best corporate culture (according to our teammates' opinions).
• Competitive salary and other stuff.
• Remote work, full time.

• Becoming not just another team member, but a part of UKAD with unique value and long-term relationships.

   

Some facts about UKAD to help you make a decision:
During 2022-2025, we only increased cooperation with our foreign partners.

UKAD combines benefits of family-sized companies, like no bureaucracy, easy access to the executives, with sustainable growth and vast opportunities.
Our company is strong enough to be not just a vendor but a tech partner. We can afford to choose customers that respect developers.
UKAD is one of the leading employers in Kharkiv, according to DOU.

Aren't we the company you're looking for?

We’re looking for a Back-End focused engineer to join a product team building scalable, event-driven services on AWS. You’ll work primarily on backend systems and microservices, with occasional frontend tasks as a nice bonus.

What you’ll do

• Design, build, and maintain backend services using Node.js and TypeScript
• Develop event-driven workflows with AWS Lambda, SNS, SQS, EventBridge
• Build and evolve microservices with a focus on scalability, reliability, and clean APIs
• Own infrastructure changes using Terraform / Infrastructure as Code
• Work with PostgreSQL (schemas, queries, performance considerations)
• Contribute to deployments and delivery pipelines (CI/CD), and collaborate on Kubernetes-based environments

• Partner with the team to troubleshoot production issues and improve observability and stability

   

Tech stack

• Backend: Node.js, TypeScript, AWS (Lambda, SNS, SQS, EventBridge), microservices
• Infrastructure: Terraform (IaC), Kubernetes, CI/CD
• Database: PostgreSQL
• Frontend (plus): React, Material UI, Redux, TypeScript

What we’re looking for

• Strong commercial experience building backend systems with Node.js + TypeScript
• Hands-on experience with AWS serverless and event-driven architecture
• Solid understanding of microservices (integration patterns, resilience, performance)
• Practical experience with Terraform (or another IaC approach) and modern delivery practices
• Confidence working with PostgreSQL
• Ownership mindset: you can take a feature from design to production and support it after release

Nice to have

• Frontend experience with React / Redux / Material UI
• Experience running workloads on Kubernetes
• Familiarity with improving CI/CD pipelines and developer experience

Working hours

• 09:00–18:00 UK time (11:00–20:00 Kyiv time)

We are looking for a Senior Node.js developer with 4+ years of commercial experience to join our project from Ireland. You will work with a modern Node.js stack, contribute to architectural decisions, and mentor a Middle Backend Engineer.

Requirements

Must have:

• 4+ years of commercial experience with Node.js (version 18)
• Hands-on experience with Express.js
• Solid knowledge of REST API design principles
• Experience with AWS services, including AWS Lambda
• Proficiency with MongoDB and Mongoose
• Experience working with Firebase
• Familiarity with Sentry or similar monitoring tools
• Understanding of backend architecture and scalable system design
• Experience leading or mentoring other backend developers

• Upper - Intermediate or higher level of English

   

Nice to Have

• Experience with AI integrations
• Hands-on experience with AWS RDS 

• Strong background in complex third-party integrations (social media APIs, payment providers, external platforms)

   

Responsibilities

• Develop and maintain backend services for web and mobile applications
• Review code and ensure high code quality and best practices
• Design, build, and evolve backend architecture
• Monitor application performance and stability using logging and monitoring tools

• Lead and mentor a Middle Backend Engineer

   

About the Project

It’s a marketing platform that brings together your social media, customer reviews, mobile, and email marketing—all in one place.

Whether you run a single-location store or manage multiple venues, the platform helps you connect with your local community through powerful technology and ongoing support. Designed for both mobile and desktop, it makes your digital marketing simpler by unifying your social channels, advertising, performance insights, reputation management, email campaigns, and online bookings into one easy-to-use system.

Stage

Active development

Project team

Project Manager, Scrum Master, Back-End Developer, Front-End Developer, 2 Quality Assurance Engineers 

Work Schedule

Full-time working day in our Lviv or Kyiv office (flexible hours) or full-time remote

Interview Stages

1. Call with Recruiter
2. Technical interview with Recruiter and Node.js developer

3. Client interview

    

Our benefits

• Projects with modern JS stack (React.js, React Native, Angular, Node.js)
• Work from anywhere (fully remotely or in our office) 
• Paid vacations and sick-leaves, additional days-off, relocation bonus
• Wellness: Medical insurance/ sport compensation/ health check-up+flu vaccination at your choice
• Education: regular tech-talks, educational courses, paid certifications, English classes
• Fun: own football team, budget for team-lunches, branded gifts
• One of the best IT employers in Lviv based on DOU rating (8th place among IT service companies in Ukraine, 11th place among all companies in Lviv).

Job description

We’re looking for a senior software engineer with SRE experience to join our core team and work on complex technical challenges. 

Our client is a well-funded, fast-growing startup ($7M raised in seed) building a global equity management and compliance platform. Their solution enables dozens of customers to effectively manage their equity compensation plans, ensuring compliance with each country’s laws and regulations, and optimizing the tax treatment of employees' equity.

In this role, you’ll work with a top-tier engineering team (ex-Google, ex-Meta) on a wide range of tasks: from streamlining the development experience to optimizing the application's performance and enhancing the testing infrastructure (among other things). Our ideal candidate is a self-starter who can quickly navigate their way around new tech stacks and engineering problems. 

Required skill-set & experience

• At least 5+ years of production experience with Node.js/Nest.js and TypeScript
• Solid experience with distributed databases, queues and other data structures 
• Experience with SQL (Postgres) and NoSQL DBs (Mongo, Redis)
• Experience with ORMs (preferably Prisma) 
• Experience with containers and their orchestration (Kubernetes, Docker, Cloud Run) 
• Experience with monitoring and observability (Datadog, Grafana, Prometheus) 
• Good grasp of core computer science algorithms, data structures, their applications and tradeoffs
• Passion for debugging deep issues across stacks and networks
• Upper-intermediate+ level of English

Bonus points

• Experience with GCP and IaC (Pulumi/Terraform) 
• Experience with CI/CD (GitHub Actions) 
• You’re a contributor to open-source software or run your own projects

What’s in it for you 

• Opportunity to become a core part of a boutique software consultancy, working with well-known international customers and highly complex tech challenges 
• Competitive salary 
• Paid vacation and sick leave 
• Remote-friendly culture
• Internal mentorship and upskilling 
• Learning & development budget ($400/year)
• Health bonus ($40/month)
• PE administration support

Established in 2004, ALLSTARSIT was founded with a clear vision: to enhance the landscape of global IT employment by bridging the gap between companies and skilled professionals. The core belief was that assembling a team shouldn't be hindered by geographical constraints. Fast forward to the present day, ALLSTARSIT stands as an international outstaffing service provider committed to change the way businesses recruit, compensate, and oversee top talent worldwide. 

With operational hubs scattered across Europe, Asia, and LATAM, and its headquarters situated in San Francisco, US, the company boasts a workforce of over 1,000 adept professionals. Spanning across more than 20 countries, ALLSTARSIT offers a diverse range of skilled employees across various verticals, including AI, cybersecurity, healthcare, fintech, telecom, media, and so on.

About the Project

Our client is a fast-growing global tech company that builds a high-impact web platform used by millions worldwide. Their product powers websites at massive scale, with a strong focus on performance, innovation, and user experience. The company offers a collaborative, product-driven environment where engineers have real influence on architecture and features, working with modern technologies on solutions that shape how the web is built today.

Hybrid format, office in Warsaw.

Challenges:

• Product as a Platform - Elementor is a platform on which thousands of applications have been built. You’ll face the challenge of developing a reliable platform to support those businesses.
• You’ll design and write high-quality components to enhance system capabilities while maintaining system quality and stability.

• You’ll work on a complex and technical product with many different use cases that is used by millions of web sites and customers.

   

Required skills:

• 6+ years of proven experience as a full-stack developer, with 4 years of proven experience working with web applications using React or pure JavaScript (ES6+)
• 3+ years of experience with CSS
• 3+ years of experience in Node.js/ Typescript
• 2+ years of experience with Nest.JS
• Experience with Databases - MySQL is a Must
• Experience with building scalable backend services -Must
• Experience with the adoption of AI-powered development tools (e.g., GitHub Copilot, ChatGPT for coding assistance) - Must
• Experience and deep understanding of web application development and the web cycle, including:

1. Writing unit tests & E2E tests (Playwright experience - an advantage)
2. Avoiding security vulnerabilities

• Experience with cross-browser compatibility
• Strong English language communication skills
• Experience with Elementor - an advantage
• Having built or maintained an open-source project - an advantage

• Experience with SCSS - an advantage

   

Scope of work:

• Plan and develop new user-facing products and features
• Participate in the technical design of features
• Ensure the technical feasibility of UI/UX designs
• Maintain the stability of the system using automated tests
• Collaborate with other team members and stakeholders

Job Overview

We are looking for an experienced Senior Backend Engineer to join our engineering team. You will play a pivotal role in architecting and building high-performance, scalable microservices using NestJS.

In this role, you will tackle complex data challenges, optimize database interactions, and ensure event-driven consistency across our platform. The ideal candidate is a hands-on technical leader who loves strictly typed systems, efficient data pipelines, and clean API design. 

Key Responsibilities

• Architect & Build: Design, develop, and maintain scalable microservices using NestJS (TypeScript).
• Database Optimization: Manage complex data modeling and query optimization for high-load environments using PostgreSQL and ClickHouse.
• Event-Driven Systems: Implement and manage event-driven architectures using Apache Kafka to ensure reliable data streaming and service decoupling.
• API Management: Design and document RESTful APIs using the OpenAPI (Swagger) specification, ensuring contract-first development and seamless frontend integration.
• Real-time & Auth: Leverage Supabase for real-time subscriptions, authentication flows, or rapid prototyping where applicable.
• Code Quality: Enforce code standards through rigorous code reviews, automated testing (Jest/Supertest), and CI/CD pipelines.
• Mentorship: Mentor junior and mid-level engineers, providing technical guidance and fostering a culture of engineering excellence.

Technical Requirements

• NestJS Expert: 5+ years of backend development experience, with deep expertise in NestJS and the Node.js ecosystem.
• Relational Data: Advanced proficiency with PostgreSQL, including optimization, indexing, and raw SQL queries.
• Big Data Analytics: Production experience with ClickHouse for analytical processing and handling large datasets.
• Event Streaming: Strong experience with Apache Kafka (producers, consumers, partition strategies, and schema registries).
• Microservices: Proven track record of decomposing monoliths or building microservices from scratch (gRPC, RabbitMQ, knowledge is a plus).
• API Standards: Mastery of OpenAPI/Swagger tools to generate clients and documentation automatically.
• Supabase: Experience integrating Supabase (PostgREST, Realtime, or Auth) into a custom backend architecture.
• Testing: Strong belief in TDD/BDD, with proficiency in writing unit and integration tests.

Nice-to-Have

• Experience with containerization and orchestration (Docker, Kubernetes).
• Knowledge of Redis for caching strategies.
• Experience with Infrastructure as Code (Terraform).
• Familiarity with GraphQL.

Soft Skills

• Problem Solver: You enjoy digging into complex performance bottlenecks and solving them efficiently.
• Communicator: You can explain complex architectural decisions to non-technical stakeholders.
• Owner: You take full ownership of your features, from design to deployment and monitoring.

Why Join Us?

• Competitive Salary: We value your expertise and pay accordingly.
• Remote-First Culture: Work from where you are most productive.
• Tech-Forward: We are constantly evaluating and adopting the best tools for the job (like the stack mentioned above).
• Professional Development: Budget for courses, conferences, and certifications.
• Long Term Position: Stable and long term position.
• Flexible and Secure Payments: Via deel.com 

We are looking for a Middle Node.js Developer with 3+ years of programming background to join a mature SaaS ad-tech platform and work on a data-intensive, high-load system used by hundreds of global clients.

JOB REQUIREMENTS

Must have:

• 3+ years of commercial experience in backend development
• Strong hands-on experience with Node.js and TypeScript
• Solid knowledge of AWS services (S3, Lambda, SQS, CloudWatch, API Gateway, CloudFormation, CDK, AWS SDK)
• Experience with serverless architectures
• Strong experience with MongoDB
• Upper-Intermediate English (direct communication with the client)

Nice to have:

• Experience with SQL and analytical databases (Snowflake, AWS Athena)
• Experience working with high-load systems
• Experience with GCP, especially BigQuery

PROJECT

Customer:
Global UK startup

Type:
SaaS, ad-tech, e-commerce 

Product:
The product is a SaaS platform that helps brands optimize sales and advertising across major marketplaces such as Amazon, Shopify, and Walmart etc. It processes huge volumes of data daily and uses ML and analytics to automate advertising decisions, optimize budgets, and provide actionable business insights to customers.

Market:
Global 

Stage:
Growing and mature product

Project team:
3 Full-stack developers, 1 QA/Lead
All developers work in close collaboration with the client

Technical stack: Node.js, TypeScript, AWS (S3, Lambda, SQS, CloudWatch, API Gateway, CloudFormation, CDK, SDK), Serverless, MongoDB, Snowflake, AWS Athena, BigQuery

Work schedule:
Full-time working day, the full remote is available

Key achievements:

• High-load system processing large volumes of data daily
• Around 500 enterprise clients (Fortune 500-level companies)
• Product uses ML / AI components for analytics and automation
• Long-term cooperation between TechMagic and the client (5+ years)

Interview stages

1. Call with the recruiter
2. Technical interview 
3. Client interview 

Our Benefits

• Projects with modern JS stack (React.js, Angular, Node.js)
• Strong JavaScript community at the company (90+ developers)
• Work from anywhere (fully remotely or in our office)
• Paid vacations and sick-leaves, additional days-off
• Wellness: medical insurance / sport compensation / health check-up
• Education: tech talks, educational courses, paid certifications, English classes
• Fun: team activities, branded gifts
• One of the best IT employers in Lviv / Ukraine based on DOU rating

We are looking for a Tech Lead / Backend Architect to design and guide the implementation of a white‑label platform that enables creators (streamers, bloggers, influencers) to launch their own branded mobile apps for their communities. The platform aggregates content from major social networks and adds messaging, livestreams, and management dashboards.
 

You will own the technical architecture, lead key implementation decisions, and work hands‑on on the most critical backend components. You will closely collaborate with the project manager, product stakeholders, and a small senior engineering team.

Duration: 9-12 weeks, potential extension.
 

Key responsibilities:

• Design the overall backend architecture (multi‑tenant model, security, scalability, API boundaries).
• Define technical approach for integrations with YouTube, Twitch, Instagram, TikTok, X/Twitter, etc.
• Lead implementation of core modules: authentication/authorization, configuration, content, messaging, notifications, moderation, and analytics.
• Establish coding standards, review pull requests, mentor backend and frontend developers.
• Collaborate with DevOps on infrastructure, deployment and monitoring strategy.
• Assess technical risks, propose mitigations, and ensure the MVP is production‑ready.
   

Requirements:

• 5+ years of backend development experience, with at least 2+ years in a lead/architect role.
• Strong expertise with Node.js, TypeScript and NestJS.
• Solid understanding of distributed systems, multi‑tenant architectures and security best practices.
• Experience integrating with third‑party APIs at scale (ideally social media or similar platforms).
• Good knowledge of relational databases (PostgreSQL), caching (Redis), and message/queue systems.
• Experience working with cloud infrastructure (preferably AWS) in production environments.
• Upper‑Intermediate English (ability to lead technical discussions with international stakeholders).
   

Nice to have:

• Experience with real‑time systems (WebSockets, live chat, streaming features).
• Knowledge of GDPR and data protection practices for consumer products.

• Previous work on creator‑focused, subscription, or media platforms.

   

  What we offer:

• Focused 3-month MVP sprint with experienced senior team (2 Backend, Frontend, DevOps, QA, PM)
• Cutting-edge stack: Node.js/NestJS TS, PostgreSQL/Redis, AWS ECS/EKS, React/Next.js
• Real product impact — a platform that launches in App Store for creators' fans
• Long-term potential after MVP (Phase 2+ payments, advanced features per roadmap)

• Remote work, flexible hours, timely payments via contract
   

  We're excited to build something creators will love — let's talk technical vision! 🚀

We are looking for Senior Backend Engineers to implement the core APIs and features for a white-label platform that enables creators to launch branded mobile apps aggregating content from YouTube, Twitch, Instagram, TikTok, Twitter/X, with exclusive content, free messaging, and livestreams.

Duration: 9-12 weeks MVP, with long-term potential (Phase 2+ payments, advanced features).
 

Key responsibilities:

• Build REST APIs for social feed aggregation/normalization (5 platforms → unified JSON), content CRUD (S3 secure upload, thumbnails, scheduling), free WebSocket messaging (text/image/voice notes, delivery/read receipts), Firebase push notifications (deep links), livestream URL/status management (YouTube/Twitch APIs).
• Implement background workers: hourly social sync, analytics aggregation (subscriber growth, content engagement, DM stats), AWS Rekognition moderation queue, media processing callbacks.
• Design PostgreSQL schemas for multi-tenant data (creator isolation), Redis for caching/pubsub.
• Write clean, testable code with unit/integration tests, contribute to OpenAPI 3.0 documentation.
   

Requirements:

• 4+ years Node.js/NestJS TypeScript production experience, REST API design.
• Hands-on with social media APIs (YouTube Data API, Twitch Helix, etc.), OAuth flows.
• WebSocket real-time experience (chat/messaging), AWS S3 media handling.
• PostgreSQL + ORMs, Redis caching/pubsub, job queues (Bull/Agenda/BullMQ).
• Docker basics, Git workflow.
• English B1+ (code reviews, docs, team syncs).
   

Nice to have:

• Firebase FCM push notifications.
• Background processing at scale, OpenAPI specs.
• Esports/media platforms, real-time systems experience.

What we offer:

• Real App Store product impact — platform powers creators' fan apps
• Modern stack: Node.js/NestJS → PostgreSQL/Redis → AWS S3/ECS → Firebase
• Senior team context: Tech Lead Architect, 2nd Backend, Frontend, DevOps (AWS cert), QA, PM
• Long-term roadmap after MVP (Phase 2 payments/subscriptions, native livestream)
• Remote/hybrid (Ivano-Frankivsk), flexible hours
   

Technical challenges you'll own:

• 5 social APIs → unified feed (hourly background sync, caching strategy)
• Production WebSocket messaging (delivery guarantees, read receipts)
• Multi-tenant content isolation (creator data separation)
   

Let's build the next-generation creator platform together! 🚀

Who are we, and what do we aspire to?
Liven is a product company that builds a companion for self-discovery.
We believe that self-discovery is a lifelong journey and want to help people navigate it every step of the way. That’s why Liven is building a system of tools to help people compose themselves and grow into who they want to become.
People use Liven to track their mood, process emotions, and untangle thoughts by chatting with an AI companion. They build new routines with a task planner, explore how their brain and body react to trauma through personalized courses, take well-being quizzes, and relax or refocus with soundscapes.
Our goal is to become the most trusted self-discovery companion globally. Liven is here to define and lead the mental wellbeing category. We aim to earn global trust by building an ecosystem of context-aware products for self-care and improvement. Our brand is optimistic and whimsical, yet wise and practical. We’re Liven! We bring joy back to life!

What will you enjoy most about being on the Liven team?
Since 2023, we’ve been scaling non-stop. We’re expanding the product, the team behind it, and our global reach. Liven has grown a lot since it was just a team of four. But our priority remains the same: building a vibrant culture where we share ideas, speedrun through challenges, and shape the business together.

The Role You’ll Own Senior/Lead Backend Engineer

• Owning backend development within the product domain and actively shaping technical decisions
• Working closely with stakeholders to turn business needs into practical, well-designed solutions
• Setting a high bar for code quality and encouraging best engineering practices in everyday work
• Collaborating with cross-functional teams to improve system integration and make processes smoother
• Continuously evolving the codebase, architecture, services, and development practices
• Leading, mentoring, and coordinating the backend development team

Preferred Experience:

• 5+ years of hands-on backend development experience (Node.js or Python)
• Experience in people management, with a genuine interest in growing and supporting a team (will be a plus)
• Strong communication skills and the ability to work effectively with both technical and non-technical stakeholders
• Ability to work within a dynamic environment

Our Stack:

Node.Js, Nest.js, Typescript, Postgres, Redis, Mongodb, BigQuery, GCP

Why Liven?
People join Liven to bring to life the aspirations they once only dared to imagine.
Here’s what we offer to support you personally and professionally while you grow with us:
— A culture that values your ideas and empowers initiative.
— A growing team of over 150 passionate professionals.
— Health insurance, in-house doctor, and massage therapy.
— Internal professional clubs on marketing, development, payments, customer experience, and entrepreneurship.
— Sports and passion clubs: functional training, stretching, yoga, running, board games and more.
— Opportunities for continuous learning and growth.
— Meaningful work that makes a real impact.We also fund projects that help overcome the consequences of the war and contribute to Ukraine’s recovery through the SKELAR foundation, a charity created and run by our employees.
If you want to shape a product that helps people face challenges, process emotions, heal from trauma, rebuild a positive self-image, and rediscover joy — Liven is the place for you!

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

Our client operates a global B2B distribution platform connecting supply partners and third-party resellers through real-time APIs and microservices.

The system delivers end-to-end search, pricing, booking, and update notifications across multiple continents, handling billions of daily requests.

It integrates diverse external feeds for availability, rates, taxes, and policies, processes data in asynchronous pipelines, and exposes flexible interfaces to accommodate various consumer needs.

Deployed across cloud regions, the platform uses persistent databases, in-memory caches, and queuing layers to ensure low-latency responses under heavy load.

Engineers face challenges in distributed system design, performance tuning at scale, resilient error handling, and continuous delivery of critical revenue-driving services.

About the Role:

This senior position sits in the core infrastructure team responsible for the mission-critical search and transaction services at the heart of the platform.

You will take full lifecycle ownership of key microservices, from initial design and implementation through deployment, monitoring, and ongoing optimization.

Working in bi-weekly sprints, you will collaborate with product managers, architects, and DevOps to deliver new features, troubleshoot production incidents, and drive system performance improvements.

In this role you will shape service contracts, maintain event-driven workflows, integrate external APIs, enforce coding standards, and expand automated test coverage.

You will mentor peers, influence technical direction, and directly impact the reliability and scalability of a high-volume platform.

Key Responsibilities:

• Design, implement, and maintain scalable APIs and microservices that support high-volume search and booking workflows.
• Integrate, normalize, and process data from multiple external services into flexible downstream interfaces.
• Optimize service performance and maintain low-latency responses under heavy concurrency and global traffic.
• Build and maintain automated unit and integration tests, ensuring code quality and preventing regressions.
• Troubleshoot production issues, collaborating with DevOps on deployments, monitoring, and incident response.
• Participate in architecture and design reviews to drive resilience, scalability, and service decomposition.
• Own one or more services as the designated system owner, ensuring uptime, observability, and comprehensive documentation.
• Collaborate with stakeholders to translate complex business requirements into robust technical solutions.

Required Competence and Skills:

• At least 5 years of professional backend development experience.
• Proven track record designing and implementing RESTful APIs and microservices.
• Strong proficiency in JavaScript and Node.js (e.g., Express or equivalent frameworks).
• Deep understanding of asynchronous programming, event-driven patterns, and related pitfalls.
• Solid grasp of fundamental design principles for distributed, high-scale applications.
• Experience with data stores such as Redis, MongoDB, MySQL, or similar technologies.
• Familiarity with queuing solutions like RabbitMQ, SQS, Gearman, or equivalents.
• Skilled in writing automated tests and maintaining CI/CD pipelines.
• Proficient with Git for version control.
• Practical experience with cloud platforms (AWS, GCP) and Linux environments.
• Understanding of containerization and deployment workflows in a DevOps context.

Why Us:

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.

Our Customer:
A growing technology company building internal platforms and services for enterprise applications.

Your Tasks:
 

• Develop and maintain backend services using Python and Node.js.
• Implement and maintain access control and authorization mechanisms.
• Build reusable internal tools and libraries to improve development efficiency.
• Monitor system performance and reliability through logging and observability features.
• Work collaboratively with other engineers to deliver new functionality and improve existing systems.

Required Experience and Skills:

• 5+ years of software development experience with strong Python and Node.js skills.
• Practical experience with access control or policy-based systems.
• Understanding of common identity and authorization models (RBAC/ABAC).
• Familiarity with cloud or distributed computing concepts.
• Experience creating reusable components or internal libraries.
• Strong analytical skills and attention to detail.

Would Be a Plus:

• Experience with high-performance or critical backend components.
• Exposure to event-driven architectures.
• Knowledge of compliance or regulatory standards is a plus.
• Contributions to open-source projects or community tools.

Working Conditions:

• Remote work;
• 5-day working week, 8-hour working day, flexible schedule;
• All public holidays are days off;
• Vacation and sick leave are covered by the company.

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

Our client operates a global B2B distribution platform connecting supply partners and third-party resellers through real-time APIs and microservices.

The system delivers end-to-end search, pricing, booking, and update notifications across multiple continents, handling billions of daily requests.

It integrates diverse external feeds for availability, rates, taxes, and policies, processes data in asynchronous pipelines, and exposes flexible interfaces to accommodate various consumer needs.

Deployed across cloud regions, the platform uses persistent databases, in-memory caches, and queuing layers to ensure low-latency responses under heavy load.

Engineers face challenges in distributed system design, performance tuning at scale, resilient error handling, and continuous delivery of critical revenue-driving services.

About the Role:

This senior position sits in the core infrastructure team responsible for the mission-critical search and transaction services at the heart of the platform.

You will take full lifecycle ownership of key microservices, from initial design and implementation through deployment, monitoring, and ongoing optimization.

Working in bi-weekly sprints, you will collaborate with product managers, architects, and DevOps to deliver new features, troubleshoot production incidents, and drive system performance improvements.

In this role you will shape service contracts, maintain event-driven workflows, integrate external APIs, enforce coding standards, and expand automated test coverage.

You will mentor peers, influence technical direction, and directly impact the reliability and scalability of a high-volume platform.

Key Responsibilities:

• Design, implement, and maintain scalable APIs and microservices that support high-volume search and booking workflows.

• Integrate, normalize, and process data from multiple external services into flexible downstream interfaces.

• Optimize service performance and maintain low-latency responses under heavy concurrency and global traffic.

• Build and maintain automated unit and integration tests, ensuring code quality and preventing regressions.

• Troubleshoot production issues, collaborating with DevOps on deployments, monitoring, and incident response.

• Participate in architecture and design reviews to drive resilience, scalability, and service decomposition.

• Own one or more services as the designated system owner, ensuring uptime, observability, and comprehensive documentation.

• Collaborate with stakeholders to translate complex business requirements into robust technical solutions.

Required Competence and Skills:

• At least 5 years of professional backend development experience.

• Proven track record designing and implementing RESTful APIs and microservices.

• Strong proficiency in JavaScript and Node.js (e.g., Express or equivalent frameworks).

• Deep understanding of asynchronous programming, event-driven patterns, and related pitfalls.

• Solid grasp of fundamental design principles for distributed, high-scale applications.

• Experience with data stores such as Redis, MongoDB, MySQL, or similar technologies.

• Familiarity with queuing solutions like RabbitMQ, SQS, Gearman, or equivalents.

• Skilled in writing automated tests and maintaining CI/CD pipelines.

• Proficient with Git for version control.

• Practical experience with cloud platforms (AWS, GCP) and Linux environments.

• Understanding of containerization and deployment workflows in a DevOps context.

Why Us:

•We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

•We provide full accounting and legal support in all countries we operate.

•We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

•We offer a highly competitive package with yearly performance and compensation reviews.

Is This the Role for You?

An architect who thinks in first principles. Someone who sees legacy chaos and reimagines it from scratch. You love making complex technical decisions and defending them to your team and business stakeholders. If that's you, something special is waiting.

What You'll Be Doing:
Leading a major e-commerce platform migration from legacy monolith to modern headless architecture. This is your chance to define the technical strategy that will shape the platform for years – and influence how millions of users experience it.

Your Real Impact:

- Define the technical strategy for a platform migration at scale

- Make critical architectural decisions that stick

- Build and mentor a technical team

- Optimize costs through intelligent design

- Bridge engineering and business to drive real results

Why This Role?

- Real Impact: Lead technical strategy for a major platform, influence business success

- Remote Flexibility: Work from anywhere within a globally distributed team

- Professional Growth: Expand expertise in modern frameworks and large-scale e-commerce

- Innovation-Driven: Experiment with the latest tech, AI-assisted development, serverless architectures

- Freedom in Tech Choices: You decide the stack, Next.js or Nuxt (to be finalized)

What You Need:

Must-Have

- 3+ years with modern frameworks (Next.js, Nuxt, Remix, SvelteKit)

- 5+ years building production React or Vue applications

- Led e-commerce migrations from legacy to modern platforms

- Strong TypeScript, modern tooling (Vite, Webpack), and edge platforms (Vercel, Netlify, Cloudflare)

- Proven technical leadership experience mentoring teams

- Deep understanding of SSR, ISR, routing, caching, and Core Web Vitals

Nice-to-Have

- Expertise in both React and Vue ecosystems

- Serverless and edge computing architecture

- Feature flags and phased rollout strategies

- Experience with NextAuth.js, Jest, Vitest, Playwright

- Modern state management (Zustand, Jotai, Pinia)

Success in This Role:

You excel with first-principles thinking, pragmatism over perfection, and smart tradeoffs. You explain complex ideas simply – to developers and CFOs alike. You love mentoring and take ownership of your decisions.