Jobs Node.js

About AIstats

AIstats is transforming the football data market by moving from 2D to 3D, powered by a cutting-edge Computer Vision and Machine Learning ecosystem that unlocks deep insights for both fans and professionals.

In 1.5 years, the Warsaw-based startup has grown from $0 to $3M ARR and secured over $2M in funding. As an AI-first startup, we’re looking for passionate builders who want to create something big and shape the future of football intelligence with us.

What we build

Advanced Football Analytics - a mobile app for football fans and bettors that reached 100k MAU in less than a year, featuring advanced statistics powered by our proprietary ML and Computer Vision technologies.

Advanced Analytics for Football Clubs - a next-generation analytics platform helping football clubs, scouts, and agents make smarter decisions both on the pitch and in the transfer market. Thanks to our early leadership in skeletal tracking data, AIstats secured several Tier-1 club partnerships within months of launching the platform.

Key Responsibilities

• Development of new HTTP and WebSocket endpoints with integration of third-party APIs (REST/gRPC/GraphQL - depending on tasks).
• Writing unit and integration tests to ensure correct operation of APIs, including boundary cases and work with external services.
• Performing load testing and code profiling to identify bottlenecks and improve performance.
• Working closely with frontend, analytics and product teams - from discussing specifications to implementing solutions in production.

Requirements

Must have:

• Strong knowledge of Node.js and TypeScript, experience in REST/WebSocket API development.
• Experience with microservice architecture and interaction between services via RabbitMQ, Redis, TCP connections.
• Knowledge of PostgreSQL (query writing, indexing, transactions, migrations).
• Experience with MongoDB and understanding when it is appropriate to use it.
• Experience with Docker, understanding of how docker-compose works.
• Understanding of the principles of Nginx as a proxy server (including in the context of WebSocket/HTTPS).
• Proficiency with Socket.io, understanding of its features (e.g., rooms, reconnect, persistence, etc.).
• Experience in configuring logging, debugging and profiling backend code.

Will be a plus:

• Understanding how Billing systems work
• Experience with Elasticsearch: setting up and using it for full-text search.
• Load testing skills and tools (e.g. k6, Artillery, autocannon).
• Understanding and implementation of HTTPS, certificates, working via secure WebSocket.
• Experience with CI/CD and build automation in a Docker environment.
• Team development experience: code review, git flow, Jira/YouTrack/Linear.

What we offer

• Fully remote work format and flexible working hours.
• Competitive salary pegged to USD.
• 24 days of paid vacation and 15 additional paid days off (including sick leave, personal days and corporate holidays)
• A friendly communication culture, rapid product cycles, and transparent processes.
• Dynamic work environment with a team passionate about sports and technology.
• Opportunities for professional development and career growth.
• No micromanagement — just trust, ownership, and freedom to experiment.
• Mentorship and high-quality engineering feedback.

Join our team and help drive innovation in the football industry!

Looking for a Node.js developer who's not afraid of Rust, urgent tasks, and building infrastructure that actually matters.

The architecture, documentation, and project roadmap are already in place—the team is working according to clear plans, without chaos or reinventing the wheel. 
 

What we expect from you during our collaboration: 
- Developing and maintaining the backend using Node.js (NestJS, Express/Fastify) 
- Promptly resolving urgent issues on existing Node/Nest services 

- Gradual onboarding into the Rust project with support and mentorship from the project’s technical lead 

- Working with SQL and NoSQL databases (MongoDB, Redis) and microservice architecture

This role is a great fit if you: 

- Have 2–3 years of professional experience with Node.js 

- Have a solid understanding of NestJS, Express, or Fastify 

- Have experience working with SQL and NoSQL (MongoDB, Redis) and an understanding of microservice architecture 

- Are able to complete tasks independently without constant supervision from a manager 

- Willingness to learn Rust on the job—this is not a prerequisite, but an expectation for growth during the first few months 

- Experience with or interest in using AI tools in day-to-day development 

The following would be a plus: 

- Knowledge of Rust 

- Understanding of how DNS/CDN systems work
 

What we offer:

• 24 days of vacation + days off
• Remote work — choose any corner of the world to “be with us”
• Support for your learning and professional development through external courses and educational activities (conferences, webinars, etc.)
• Benefit Café: reimbursement for sports activities, English language courses, and mental health support
• Health insurance
• Financial support during difficult life situations—we understand that this is an extremely challenging time for every Ukrainian, so we’re here for you not only on the “good days” but also on the “tough ones.”
• Employee referral program. The opportunity to directly influence business development and hiring strategy at a rapidly growing international company.

Hiring process: Recruiter interview → Interview with Head of Dev → Reference check → Job Offer.

Reach out if you’re ready to quickly tackle practical tasks using Node.js and want to grow your skills in Rust and large-scale infrastructure systems.

About the Staff Software Engineer role 🔍

As a Staff Software Engineer on our Platform team, you’ll design, implement, and maintain robust, high-quality backend APIs and services. Your work will directly impact Motion’s core operations and enable teams across the company to leverage our data across multiple product lines.

| Our tech stack: React, Node.js with Express, TypeScript, GraphQL, PostgreSQL, MongoDB, and Azure.

What you'd be doing 🛠️

• Scoping, designing, and implementing resilient, performant, and high-quality backend solutions.
• Working closely with fellow engineers to deliver complex backend features and integrations.
• Maintaining and enhancing existing integrations, anticipating future product solutions and making sure our systems scale with Motion’s growth.
• Identifying and resolving errors, performance issues, and devex problems in our codebase.
• Driving engineering advancements.

Sample projects:

• Build a unified API for our insights data to be used by other development teams.
• Store insights and metrics from our data providers at scale.

Our ideal fit brings ✨
 

• 6+ years of experience building and maintaining large-scale software applications.
• Proficiency with our core stack (React, Node.js, TypeScript) is ideal, though we’re open to adjacent tech.
• Strong experience with asynchronous message queue systems.
• Experience with MongoDB or other document-based databases.
• Solid understanding of data modelling, ETL concepts, and simplifying data architecture.
• Exceptional written and verbal communication skills with a knack for translating complex technical issues into clear business impacts.
• Interest in AI/ML.
• Ability to thrive in a fast-paced environment with evolving requirements and priorities.
• A pragmatic approach to tackling challenging problems, with a deep interest in understanding and solving business needs.

What you'll love about the company 💜

• Competitive compensation package: We offer competitive compensation, including equity for all employees, health benefits from day one, a monthly health & lifestyle stipend to support your well-being, 20 days of PTO, and a $1,500 work-from-home stipend.
• Remote-first with hybrid flexibility: We're a remote-first company with team members spanning Canada, the U.S., and beyond, but also have office spaces in 4 main hubs (Toronto, Montreal, Vancouver, and Porto) for optional hybrid work.
• Growth that speaks for itself: Motion has strong product-market fit, 3x YoY growth, second-time founders with deep industry knowledge, and $30M in Series B funding to fuel our momentum.
• Opportunity for impact: As an early team member, your contributions will directly shape the product, team, and the future of the company. If you're excited about building, you’ll thrive here!
• Award-winning team: We're a low-ego, high-performing team that was just ranked #5 on LinkedIn’s Top 15 Startups in Canada for 2025.
• Team connection: To stay connected in a virtual workspace, we get together at least once a year for a company-wide offsite (this year, we spent a week by the lake in Muskoka, Canada!)

🌎 A note on location: It is a fully remote company, but we’re looking for someone in or around one of our hub cities (Toronto, Montreal, or Porto, Portugal) who can work with significant overlap with ET working hours.

Employment: Full-time

Salary: $2,800–3,500 net (depending on interview results and experience)

Probation Period: 1 month (salary during probation depends on the candidate's actual range)

About the Project

We're building a slots game engine on a modern Node.js stack: round state machine, provably-fair mechanics, and reliable transactional logic for a multi-currency financial platform. The challenges revolve around deterministic computation, money-calculation precision, and balance consistency under load.

Our Tech Stack

Node.js · TypeScript · Fastify · PostgreSQL · WebSocket/Socket.IO · Firebase Auth · Provably Fair (HMAC-SHA256) · BigInt · Docker

Responsibilities

• Design the game engine using Node.js, TypeScript, and Fastify: round state machine, outcome taxonomy, autoplay, bet cancellation.
• Implement Provably Fair (HMAC-SHA256) with server-side generation and verification, plus BigInt arithmetic for money calculations.
• Develop the wallet and transactions: multi-currency support, deposits/withdrawals, idempotency, balance consistency.
• Build platform logic: KYC, VIP levels, affiliate program, leaderboards, notifications.
• Integrate an external betting API (Axios: auto-refresh, circuit breaker), real-time layer (WebSocket/Socket.IO), and authorization via Firebase.
• Work with PostgreSQL and containerization (Docker/Compose); cover critical logic with tests.

Requirements (must-have)

• 3+ years of back-end development experience with Node.js and TypeScript (Fastify/Express preferred).
• Experience designing transactional logic (balances, payments, idempotency) and working with PostgreSQL.
• Understanding of deterministic computation and money-calculation precision (BigInt / decimal), state machines.
• Experience integrating external APIs and real-time communication.
• Middle+: autonomy, testing, code review, attention to security.
• Experience in iGaming/Casino, provably-fair/cryptography (HMAC-SHA256), RNG mechanics.

Nice to Have

• Firebase Auth (2FA TOTP), experience with KYC/AML, VIP/affiliate systems.
• Familiarity with regulated betting and high-load financial systems.

Employment: Full-time

Salary: $2,900–3,500 net (depending on interview results and experience)

Probation Period: 1 month (salary during probation depends on the candidate's actual range)

About the Project

We're building a high-load betting engine with real-time interaction: round lifecycle management, outcome and payout calculation, synchronized broadcasting, and front-running protection. The stack is modern, and the challenges revolve around latency, consistency, and reliability under load.

Our Tech Stack

Node.js · TypeScript · Express 5 · PostgreSQL/Prisma · Redis · Kafka/KafkaJS · ClickHouse · WebSocket/Socket.IO · PostHog · Pino · Vitest · Docker

Responsibilities

• Design and develop the betting engine using Node.js, TypeScript, and Express 5: round lifecycle, outcome and payout calculation, idempotent operations.
• Implement the real-time layer with WebSocket/Socket.IO, featuring synchronized broadcast delays (bet-lock, front-running protection).
• Build event-driven pipelines with Kafka/KafkaJS and analytics/anti-fraud storage on ClickHouse.
• Integrate HLS feed parsing (.m3u8) and a computer vision service; implement provably-fair (commit-reveal) mechanisms.
• Work with PostgreSQL/Prisma and Redis (caching, round state management, rate-limiting); set up observability (PostHog, Pino).
• Ensure reliability: testing (Vitest), containerization (Docker/Compose), feed fault tolerance (failover, auto-void).

Requirements (must-have)

• 3+ years of back-end development experience with Node.js and TypeScript.
• Hands-on experience with real-time/WebSocket and high-load services (latency, concurrency, consistency).
• Confident work with PostgreSQL and Redis; understanding of transactions, idempotency, and race conditions.
• Experience with message brokers (Kafka or similar) and building event-driven pipelines.
• Understanding of service reliability: logging, metrics, failure handling, testing.
• Experience in the iGaming/Betting industry.

Nice to Have

• ClickHouse or other analytical/column-oriented databases; anti-fraud logic.
• Experience with video streaming (HLS/RTMP), computer vision, provably-fair/cryptography (HMAC).

We are looking for a Lead Backend Developer to architect and own the backend infrastructure of our fintech platform. You will design scalable microservices, manage critical data flows, and ensure system reliability at scale. Work directly with product, design, and business stakeholders to translate requirements into robust backend systems.

What You Will Do
Backend Architecture & Design

• Own the backend architecture end-to-end across microservices.
• Design and implement Node.js / Express services handling 20M+ transactions monthly.
• Architect PostgreSQL schemas for reliability and performance at scale.
• Define API contracts (GraphQL, REST) that support frontend and partner integrations.
• Make critical decisions on data consistency, caching, and async patterns.

Microservices & System Design

• Build and maintain multiple Node.js / Express microservices with clear ownership boundaries.
• Implement webhook-driven workflows and event-driven architecture.
• Design and implement real-time data synchronization pipelines.
• Manage message queues (RabbitMQ) for async operations and inter-service communication.
• Ensure row-level security (RLS) and multi-tenant data isolation at the database layer.

Data & Performance

• Design and optimize PostgreSQL schemas using Prisma ORM.
• Write complex queries, manage indexes, and ensure query performance.
• Implement caching strategies and data consistency patterns.
• Build audit trails and changelog tracking for compliance and debugging.
• Handle sensitive data (KYC, AML, financial records) with security-first approach.

Integration & Third-Party Services

• Integrate with external services (KYC providers, document verification, acquiring networks).
• Design and maintain API integrations with payment processors and clearing centers.
• Build robust error handling and retry logic for critical integrations.
• Document APIs and maintain SDK/integration guides for partners.
Communication & Leadership

• Work directly with product managers and stakeholders to clarify backend requirements.
• Proactively flag technical risks, propose solutions, and keep stakeholders informed.
• Give technical feedback on product feasibility and scalability implications.
• Lead backend code reviews with focus on quality, performance, and knowledge sharing.
• Mentor junior developers and foster backend engineering best practices.

What We Are Looking For
Core Requirements:

• 5–7 years of production experience in Node.js backend development.
• Strong TypeScript across the entire stack (no JavaScript-only experience).
• PostgreSQL expertise: schema design, optimization, transactions, advanced queries.
• Prisma ORM or similar ORMs and hands-on experience with relational databases.
• GraphQL schema design and resolver implementation (REST a plus).
• Microservices architecture: designing boundaries, managing state, async communication.
• RabbitMQ or similar message brokers; event-driven architecture patterns.
• Experience with fintech, payments, or regulated financial products.
• Strong communication skills and comfort working directly with non-technical stakeholders.

Nice to Have:

• Distributed systems experience (eventual consistency, saga patterns, consensus).
• gRPC for service-to-service communication.
• Experience scaling to 100K+ users and handling high transaction volume.
• Background in AML/KYC compliance or financial data handling.
• DevOps sensibility: monitoring, logging, deployment pipelines.
• Experience mentoring backend teams.

Tech Stack
Core: Node.js, Express, TypeScript, PostgreSQL, Prisma ORM, GraphQL, RabbitMQ, gRPC
Supporting: REST APIs, Webhooks, Real-time data sync, Multi-tenant architecture, Audit logging

What We Offer

• Full backend ownership and architectural control.
• Work on systems handling millions of transactions and 100K+ merchants.
• Direct access to product and business stakeholders.
• Modern microservices stack with no legacy debt.
• AI-friendly engineering culture—we embrace tools that make you more effective.
• Deep fintech learning: multi-partner networks, compliance, payment flows.
• Competitive compensation and benefits package.

 Hi! We are looking for a Senior Node.js Backend Developer (Payments Platform) to join our pack at SharksCode 🦈💙
 SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
 We are looking for a Senior Node.js Backend Developer who will help build and evolve our payment platform, working on scalable backend services, distributed systems, and integrations with external financial providers. In this role, you will participate in architectural decisions, develop secure and reliable payment flows, and contribute to building resilient, high-load backend services.

We expect that you:

• Have 6+ years of commercial backend development experience with Node.js.
• Have strong commercial experience with TypeScript and a deep understanding of its type system.
• Have hands-on experience designing and developing REST APIs.
• Write clean, maintainable, well-tested, and production-ready code.
• Have experience decomposing complex business requirements into scalable technical solutions.
• Can clearly explain and justify technical decisions, trade-offs, risks, and alternative approaches.
• Have strong practical experience with PostgreSQL, including query optimization, indexing, schema design, and performance tuning under high load.
• Have hands-on experience designing and developing microservice-based distributed systems.
• Understand distributed and event-driven architectures.
• Have practical experience working with Kafka.
• Have hands-on experience using Redis.
• Have experience implementing retries, timeouts, circuit breakers, rate limiting, and backpressure mechanisms.
• Have experience integrating third-party APIs, including payment providers, PSPs, banks, KYC providers, or other external services.
• Have a solid understanding of secure software development principles.
• Have practical knowledge of OAuth 2.0, JWT, HMAC, mTLS, API authentication, and authorization.
• Can identify security vulnerabilities in code, APIs, dependencies, configurations, and system architecture.
• Have experience conducting code reviews and technical audits of backend services.
• Understand principles of protecting personal, payment, and other sensitive data.
• Have a strong understanding of HTTP/HTTPS, TCP/IP, DNS, Webhooks, and the lifecycle of network requests.
• Understand TLS/mTLS, certificate lifecycle management, rotation, and secure certificate storage.
   

Your future responsibilities:

• Design, develop, and maintain backend services for the payment platform.
• Build reliable integrations with payment providers, banks, and external financial services.
• Develop scalable microservices and distributed backend components.
• Participate in architecture discussions and contribute to technical decision-making.
• Optimize PostgreSQL performance and ensure system reliability under high load.
• Ensure backend security and compliance with engineering best practices.
• Conduct code reviews and contribute to improving engineering standards within the team.
• Collaborate closely with product, QA, and infrastructure teams to deliver reliable production solutions.
   

Nice to have:

• Experience with GraphQL or gRPC.
• Experience building payment platforms, financial services, or payment processing systems.
• Experience in iGaming, Betting, FinTech, Banking, or E-commerce domains.
• Understanding of payment lifecycle concepts such as authorization, capture, void, refund, reversal, and chargeback.
• Understanding of reconciliation, settlement, payment routing, and cascading.
• Knowledge of PCI DSS, KYC/AML, and secure payment data processing.
• Experience with observability tools such as Prometheus, Grafana, OpenTelemetry, Loki, or Jaeger.
• Experience mentoring engineers and improving engineering practices.
• Understanding of threat modeling, attack surface analysis, secrets management, and the principle of least privilege.
   

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.

We are looking for a Lead Backend Developer to architect and own the backend infrastructure of our fintech platform. You will design scalable microservices, manage critical data flows, and ensure system reliability at scale. Work directly with product, design, and business stakeholders to translate requirements into robust backend systems. 

This is a hybrid role, and we are currently considering candidates based in Lviv (Ukraine). 

Fully remote work is not an option for this position.

What You Will Do
Backend Architecture & Design

• Own the backend architecture end-to-end across microservices.
• Design and implement Node.js / Express services handling 20M+ transactions monthly.
• Architect PostgreSQL schemas for reliability and performance at scale.
• Define API contracts (GraphQL, REST) that support frontend and partner integrations.
• Make critical decisions on data consistency, caching, and async patterns.

Microservices & System Design

• Build and maintain multiple Node.js / Express microservices with clear ownership boundaries.
• Implement webhook-driven workflows and event-driven architecture.
• Design and implement real-time data synchronization pipelines.
• Manage message queues (RabbitMQ) for async operations and inter-service communication.
• Ensure row-level security (RLS) and multi-tenant data isolation at the database layer.

Data & Performance

• Design and optimize PostgreSQL schemas using Prisma ORM.
• Write complex queries, manage indexes, and ensure query performance.
• Implement caching strategies and data consistency patterns.
• Build audit trails and changelog tracking for compliance and debugging.
• Handle sensitive data (KYC, AML, financial records) with security-first approach.

Integration & Third-Party Services

• Integrate with external services (KYC providers, document verification, acquiring networks).
• Design and maintain API integrations with payment processors and clearing centers.
• Build robust error handling and retry logic for critical integrations.
• Document APIs and maintain SDK/integration guides for partners.
Communication & Leadership

• Work directly with product managers and stakeholders to clarify backend requirements.
• Proactively flag technical risks, propose solutions, and keep stakeholders informed.
• Give technical feedback on product feasibility and scalability implications.
• Lead backend code reviews with focus on quality, performance, and knowledge sharing.
• Mentor junior developers and foster backend engineering best practices.

What We Are Looking For
Core Requirements:

• 5–7 years of production experience in Node.js backend development.
• Strong TypeScript across the entire stack (no JavaScript-only experience).
• PostgreSQL expertise: schema design, optimization, transactions, advanced queries.
• Prisma ORM or similar ORMs and hands-on experience with relational databases.
• GraphQL schema design and resolver implementation (REST a plus).
• Microservices architecture: designing boundaries, managing state, async communication.
• RabbitMQ or similar message brokers; event-driven architecture patterns.
• Experience with fintech, payments, or regulated financial products.
• Strong communication skills and comfort working directly with non-technical stakeholders.

Nice to Have:

• Distributed systems experience (eventual consistency, saga patterns, consensus).
• gRPC for service-to-service communication.
• Experience scaling to 100K+ users and handling high transaction volume.
• Background in AML/KYC compliance or financial data handling.
• DevOps sensibility: monitoring, logging, deployment pipelines.
• Experience mentoring backend teams.

Tech Stack
Core: Node.js, Express, TypeScript, PostgreSQL, Prisma ORM, GraphQL, RabbitMQ, gRPC
Supporting: REST APIs, Webhooks, Real-time data sync, Multi-tenant architecture, Audit logging

What We Offer

• Full backend ownership and architectural control.
• Work on systems handling millions of transactions and 100K+ merchants.
• Direct access to product and business stakeholders.
• Modern microservices stack with no legacy debt.
• AI-friendly engineering culture—we embrace tools that make you more effective.
• Deep fintech learning: multi-partner networks, compliance, payment flows.
• Competitive compensation and benefits package.

We are looking for a Lead Backend Developer to architect and own the backend infrastructure of our fintech platform. You will design scalable microservices, manage critical data flows, and ensure system reliability at scale. Work directly with product, design, and business stakeholders to translate requirements into robust backend systems.

What You Will Do
Backend Architecture & Design

• Own the backend architecture end-to-end across microservices.
• Design and implement Node.js / Express services handling 20M+ transactions monthly.
• Architect PostgreSQL schemas for reliability and performance at scale.
• Define API contracts (GraphQL, REST) that support frontend and partner integrations.
• Make critical decisions on data consistency, caching, and async patterns.

Microservices & System Design

• Build and maintain multiple Node.js / Express microservices with clear ownership boundaries.
• Implement webhook-driven workflows and event-driven architecture.
• Design and implement real-time data synchronization pipelines.
• Manage message queues (RabbitMQ) for async operations and inter-service communication.
• Ensure row-level security (RLS) and multi-tenant data isolation at the database layer.

Data & Performance

• Design and optimize PostgreSQL schemas using Prisma ORM.
• Write complex queries, manage indexes, and ensure query performance.
• Implement caching strategies and data consistency patterns.
• Build audit trails and changelog tracking for compliance and debugging.
• Handle sensitive data (KYC, AML, financial records) with security-first approach.

Integration & Third-Party Services

• Integrate with external services (KYC providers, document verification, acquiring networks).
• Design and maintain API integrations with payment processors and clearing centers.
• Build robust error handling and retry logic for critical integrations.
• Document APIs and maintain SDK/integration guides for partners.
Communication & Leadership

• Work directly with product managers and stakeholders to clarify backend requirements.
• Proactively flag technical risks, propose solutions, and keep stakeholders informed.
• Give technical feedback on product feasibility and scalability implications.
• Lead backend code reviews with focus on quality, performance, and knowledge sharing.
• Mentor junior developers and foster backend engineering best practices.

What We Are Looking For
Core Requirements:

• 5–7 years of production experience in Node.js backend development.
• Strong TypeScript across the entire stack (no JavaScript-only experience).
• PostgreSQL expertise: schema design, optimization, transactions, advanced queries.
• Prisma ORM or similar ORMs and hands-on experience with relational databases.
• GraphQL schema design and resolver implementation (REST a plus).
• Microservices architecture: designing boundaries, managing state, async communication.
• RabbitMQ or similar message brokers; event-driven architecture patterns.
• Experience with fintech, payments, or regulated financial products.
• Strong communication skills and comfort working directly with non-technical stakeholders.

Nice to Have:

• Distributed systems experience (eventual consistency, saga patterns, consensus).
• gRPC for service-to-service communication.
• Experience scaling to 100K+ users and handling high transaction volume.
• Background in AML/KYC compliance or financial data handling.
• DevOps sensibility: monitoring, logging, deployment pipelines.
• Experience mentoring backend teams.

Tech Stack
Core: Node.js, Express, TypeScript, PostgreSQL, Prisma ORM, GraphQL, RabbitMQ, gRPC
Supporting: REST APIs, Webhooks, Real-time data sync, Multi-tenant architecture, Audit logging

What We Offer

• Full backend ownership and architectural control.
• Work on systems handling millions of transactions and 100K+ merchants.
• Direct access to product and business stakeholders.
• Modern microservices stack with no legacy debt.
• AI-friendly engineering culture—we embrace tools that make you more effective.
• Deep fintech learning: multi-partner networks, compliance, payment flows.
• Competitive compensation and benefits package.

About the Position

We’re growing fast and looking for a Senior Backend Engineer to join our Engineering team and help build the infrastructure that powers our platform at scale.

This is a high-impact role where you’ll work alongside top-tier engineers, designing and building secure, high-performance systems in a fast-paced environment. If you enjoy solving complex technical challenges and want your work to have real impact — we’d love to meet you.

What We’re Looking For

• Bachelor’s degree in Computer Science or a related field
• 5+ years of experience in backend development
• Strong experience building scalable, production-grade systems
• Proficiency in Node.js
• Experience with SQL and NoSQL databases
• Familiarity with cloud platforms and microservices architecture
• Strong problem-solving skills and attention to detail
• Passion for writing clean, maintainable, and efficient code

Bonus Points For

• Experience in cybersecurity or building security-focused products
• Experience working in startup or high-growth environments
• Familiarity with DevSecOps / SDLC tools
• Experience with distributed systems and high-scale data processing

Node.js Developer — LogicCraft (Lviv, on-site)

We're a fast-growing tech company building modern, innovative digital products - and we're looking for a Node.js Developer to join our team in Lviv. If you enjoy designing solid backend systems, working with APIs, and being part of a team that values engineering quality, we'd love to hear from you.

What you'll be doing

You'll work alongside a cross-functional team to build and maintain scalable server-side applications, design and integrate APIs, and contribute to key architectural decisions that shape our products from the ground up.

What we're looking for

• Solid hands-on experience with Node.js
• Practical experience with Express.js
• Experience working with ORM tools
• Proficiency in SQL databases (MySQL / PostgreSQL) and NoSQL databases
• Experience designing server-side application architecture from scratch
• Strong understanding of REST API development and third-party API integrations

• Responsible, self-motivated, and comfortable working both independently and as part of a team

   

What we offer

• Full-time, in-office position in Lviv
• Official employment and a competitive salary based on your skills and experience
• Company-provided equipment
• A well-structured work schedule
• A friendly, supportive team and a comfortable office environment
• Mentorship and guidance from experienced colleagues
• Interesting and technically challenging projects to grow on

How to apply

Send us your CV — we review every application and get back to candidates promptly. This could be the start of something great.

Pixel mindIT is an innovative IT company specializing in software development, web applications, and mobile apps. We bring together a team of passionate professionals working with cutting-edge technologies. With us, you'll find a creative approach to complex challenges, efficient project management, and a culture of continuous growth.
 

Requirements:

- Basic to intermediate knowledge of HTML/CSS, JavaScript, and TypeScript
- Familiarity with or hands-on experience in Node.js using Express.js and/or Nest.js frameworks
- Understanding of networking principles: RESTful API design and HTTP/HTTPS protocols
- Familiarity with GraphQL APIs
- Basic understanding of databases: MongoDB, Redis, MySQL, PostgreSQL
- Eagerness to learn ORM tools such as Mongoose, Prisma.js, TypeORM, and Sequelize
- Familiarity with Git version control and GitHub in collaborative environments

What We Offer

- Flexible working hours
- Official employment with a competitive salary based on your experience and skills
- Open positions from Trainee to Middle — grow with us
- English language courses to support your professional development
- Modern office with high-quality equipment and a comfortable workspace
- Friendly and supportive team that encourages both professional and personal growth
- The opportunity to work on exciting and innovative projects

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:

We are developing a security and compliance platform that helps organizations identify, prioritize, and remediate security risks across employee devices. The solution scans endpoints for vulnerabilities, missing patches, and security configuration issues, processes large volumes of device and security data, and enables automated remediation.
The product is built on a distributed, data-intensive architecture that combines backend services, data processing pipelines, and endpoint agents. The platform requires high scalability, reliability, and efficient data processing to support complex security and compliance workflows. 

 

About the Role:

As a Senior Backend Engineer you will take end-to-end ownership of the core backend components in our compliance platform. In this individual contributor role, you will shape the architecture of the real-time telemetry pipeline, back-end services, data models, and risk-scoring engine. You will translate product and business requirements into technical trade-offs, propose simple solutions that work at scale, and challenge assumptions early in the design process. 

This position offers the opportunity to make high-impact architectural decisions and drive the technical direction of a mature, growing security product.

Key Responsibilities:

• Design and implement distributed backend services for real-time telemetry ingestion and risk scoring across thousands of endpoints.
• Build and maintain event-driven streaming pipelines using Kafka - from topic design and partitioning to consumer groups and delivery guarantees.
• Define data models and persistence strategies on PostgreSQL and Redis, optimizing for latency, consistency, and throughput.
• Write, analyze, and tune complex SQL queries; improve query plans, indexing, and overall database performance.
• Develop and maintain large-scale data processing environments, focusing on scalability, reliability, and cost efficiency.
• Identify bottlenecks in pipelines and services, and implement improvements for performance and stability.
• Translate business needs into technical requirements and influence product and architectural roadmaps.
• Collaborate with DevOps on CI/CD pipelines, container orchestration, observability, and production reliability.

Required Competence and Skills:

• 8+ years of backend development experience, including scalable distributed systems that process large volumes of data.
• Advanced hands-on expertise in TypeScript and Node.js, with strong knowledge of backend architecture and service design.
• Hands-on experience with event-driven/streaming architectures, ideally with Kafka (topic design, partitioning, consumer groups, delivery guarantees).
• Advanced knowledge of PostgreSQL and Redis, including query optimization, indexing, and performance tuning.
• Good understanding of cloud environments (Azure preferred; AWS is also relevant), containers (Docker/Kubernetes), CI/CD, observability, and general DevOps concepts, with hands-on experience using these tools in day-to-day development.
• Hands-on experience using AI tools in software development, with the ability to critically evaluate and validate AI-generated output.
• Strong product mindset and the ability to make sound technical decisions based on both engineering requirements and business needs.

Nice to Have:

• Background in information security, endpoint security, or compliance.
• Familiarity with edge-deployed agents and device-to-cloud communication.
• Experience integrating AI/LLM capabilities into backend systems.

Why Us:

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

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

We utilize a fully remote work model, with a powerful workstation and a co-working space available if needed.

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

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 is a product technology company developing a cloud-native platform that enables organizations to build, integrate, and operate secure applications leveraging blockchain and distributed ledger technologies. The platform provides scalable backend services, APIs, and infrastructure components designed for high-performance, production-grade environments.

The engineering team focuses on building resilient backend systems, distributed architectures, and blockchain-enabled services while addressing challenges related to scalability, reliability, performance, and security. Engineers collaborate closely across product, platform, and infrastructure teams to deliver robust software solutions used in mission-critical environments.

About the Role:

As a Senior Full Stack Engineer with a strong backend focus, you will design, develop, and maintain scalable backend services while also contributing to modern web applications where needed. You'll work with microservices, APIs, asynchronous architectures, blockchain integrations, and React-based frontend components, collaborating closely with cross-functional engineering teams.

This role offers end-to-end ownership of product features from architecture and implementation through deployment, monitoring, and continuous improvement, with the primary focus on backend services.

Key Responsibilities:

• Design and build scalable backend services supporting blockchain-enabled applications and distributed systems.
• Contribute to frontend features and modern React-based applications when required, ensuring a seamless end-to-end user experience.
• Develop and maintain backend services, APIs, and platform components throughout the software lifecycle.
• Integrate backend services with blockchain networks, third-party platforms, and external infrastructure.
• Evaluate emerging blockchain technologies and architectural approaches to improve platform capabilities.
• Optimize production systems for scalability, reliability, security, and performance.
• Collaborate with product, platform, infrastructure, and security teams to deliver production-ready solutions.
• Take ownership of features from design through deployment and ongoing optimization.

Required Competence and Skills:

• 7+ years of professional experience as a Full Stack or Backend Engineer.
• Strong commercial experience with Node.js, TypeScript, and React.
• Experience designing scalable backend services, APIs, and production-grade microservices. 
• Solid understanding of distributed architectures, asynchronous communication, and event-driven systems. 
• Commercial experience working with multiple blockchain ecosystems, including EVM-compatible chains, as well as non-EVM chains
• Good understanding of blockchain fundamentals, transaction processing, smart contracts, and decentralized architectures.
• Strong understanding of secure software design and building reliable production systems. 
• Experience using AI-assisted development tools (Claude Code, Cursor, GitHub Copilot, or similar) as part of the engineering workflow. 
• Bachelor's degree in Computer Science or a related technical field (or equivalent practical experience). 
• Proven ability to deliver software from design through production deployment.

Nice to Have:

• Experience building products in high-scale distributed platforms, fintech, or cloud-native products.
• Experience with cloud-native infrastructure, containers, and Kubernetes.

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.

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:

We are developing a security and compliance platform that helps organizations identify, prioritize, and remediate security risks across employee devices. The solution scans endpoints for vulnerabilities, missing patches, and security configuration issues, processes large volumes of device and security data, and enables automated remediation.
The product is built on a distributed, data-intensive architecture that combines backend services, data processing pipelines, and endpoint agents. The platform requires high scalability, reliability, and efficient data processing to support complex security and compliance workflows.

About the Role:

As a Senior Backend Engineer you will take end-to-end ownership of the core backend components in our compliance platform. In this individual contributor role, you will shape the architecture of the real-time telemetry pipeline, back-end services, data models, and risk-scoring engine. You will translate product and business requirements into technical trade-offs, propose simple solutions that work at scale, and challenge assumptions early in the design process. 

This position offers the opportunity to make high-impact architectural decisions and drive the technical direction of a mature, growing security product.

Key Responsibilities:

• Design and implement distributed backend services for real-time telemetry ingestion and risk scoring across thousands of endpoints.
• Build and maintain event-driven streaming pipelines using Kafka – from topic design and partitioning to consumer groups and delivery guarantees.
• Define data models and persistence strategies on PostgreSQL and Redis, optimizing for latency, consistency, and throughput.
• Write, analyze, and tune complex SQL queries; improve query plans, indexing, and overall database performance.
• Develop and maintain large-scale data processing environments, focusing on scalability, reliability, and cost efficiency.
• Identify bottlenecks in pipelines and services, and implement improvements for performance and stability.
• Translate business needs into technical requirements and influence product and architectural roadmaps.
• Collaborate with DevOps on CI/CD pipelines, container orchestration, observability, and production reliability.

Required Competence and Skills:

• 8+ years of backend development experience, including scalable distributed systems that process large volumes of data.
• Advanced hands-on expertise in TypeScript and Node.js, with strong knowledge of backend architecture and service design.
• Hands-on experience with event-driven/streaming architectures, ideally with Kafka (topic design, partitioning, consumer groups, delivery guarantees).
• Advanced knowledge of PostgreSQL and Redis, including query optimization, indexing, and performance tuning.
• Good understanding of cloud environments (Azure preferred; AWS is also relevant), containers (Docker/Kubernetes), CI/CD, observability, and general DevOps concepts, with hands-on experience using these tools in day-to-day development.
• Hands-on experience using AI tools in software development, with the ability to critically evaluate and validate AI-generated output.
• Strong product mindset and the ability to make sound technical decisions based on both engineering requirements and business needs.

Nice to Have:

• Background in information security, endpoint security, or compliance.
• Familiarity with edge-deployed agents and device-to-cloud communication.
• Experience integrating AI/LLM capabilities into backend systems.

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.