Senior Back-End Engineer (Node.js & AWS)

The client you’ll work with:  

iBusiness is a leading technology company transforming the way financial institutions, small businesses, and enterprises work. As a pioneer in secure AI, automation, and AI software development, we build infrastructure and platforms that empower teams to modernize processes and work more efficiently without sacrificing compliance or security. Our workflow, verticalized, and point solutions enable seamless digital transformation, giving organizations of all sizes the tools they need to compete, innovate, and grow.

Join us and be part of a team that’s building solutions designed to help businesses thrive!

Тhe role: 

As a Senior/Principal Back-End Engineer at iBusiness, you represent one of the most senior roles within the Product Engineering group. Your impact is felt across the organization as you lead the design, evolution, and operational excellence of mission-critical backend systems that power AI-first financial and enterprise platforms.

You are responsible for shaping technical direction across multiple domains, coordinating delivery across streams of work, and ensuring backend architecture aligns with long-term business and platform strategy.

You operate with exceptional autonomy, solving highly ambiguous and technically complex problems while enabling engineering teams to deliver scalable, secure, and resilient systems.

You collaborate closely with Engineering, Product, QA, DevSecOps, and business leadership to guide technical decision-making, define engineering standards, and influence organizational outcomes through technology. You are a mentor to Lead and Senior Engineers and act as a force multiplier across the engineering organization.

This role is ideal for engineers who thrive on large-scale systems design, technical leadership without people management, organizational influence, and building backend platforms that enable long-term innovation and operational excellence.

What you'll do:

• Define and drive back-end technical strategy across multiple teams and domains
• Architect, design, and evolve scalable distributed systems, APIs, microservices, and platform capabilities
• Lead complex technical initiatives with organization-wide impact, balancing immediate delivery needs with long-term architecture goals
• Establish and maintain engineering principles, backend standards, and architectural best practices
• Partner with Product and business stakeholders to align technical capabilities with strategic company objectives
• Guide teams through difficult architectural trade-offs, scalability challenges, and operational risks
• Drive improvements in reliability, observability, performance, resilience, and operational maturity across backend systems
• Proactively identify technical risks, bottlenecks, and systemic inefficiencies, and implement mitigation strategies
• Mentor and coach Senior and Lead Engineers through technical guidance, architecture reviews, pairing, and design discussions
• Influence engineering culture and ways of working across Product Engineering without relying on direct authority
• Lead incident analysis, operational improvement efforts, and postmortem-driven learning initiatives
• Leverage AI-assisted engineering practices and modern tooling to improve engineering effectiveness and delivery velocity
• Represent engineering strategy and technical direction effectively to both technical and executive audiences

What we're looking for:

• Expert-level backend engineering experience designing and operating large-scale production systems
• Deep expertise in one or more backend ecosystems such as Python, Node.js, Go or similar
• Strong experience with distributed systems, event-driven architectures, microservices, and cloud-native design patterns
• Advanced knowledge of API architecture, asynchronous processing, service orchestration, and data-intensive systems
• Extensive experience operating cloud platforms and infrastructure at scale (AWS preferred)
• Strong understanding of observability, monitoring, reliability engineering, and operational excellence practices
• Deep understanding of software architecture, scalability, resilience, performance optimization, and security engineering
• Experience making high-impact technical decisions with broad organizational implications
• Ability to navigate highly ambiguous technical and organizational problems independently
• Strong commercial awareness and ability to connect engineering investments to customer and business outcomes
• Exceptional communication skills across technical, operational, and executive stakeholders
• Demonstrated ability to mentor senior engineers and influence engineering organizations without direct management authority
• Proven ability to establish engineering standards and drive adoption across multiple teams
• Strong understanding of secure software engineering practices and regulatory/compliance considerations in production systems

Brownie points:

• Experience with tenant-based architecture
• Experience building AI-enabled back-end systems, agentic architectures or LLM infrastructure
• Experience with high-scale event streaming and messaging systems (SNS/SQS, RabbitMQ etc)
• Experience with data modeling, data architecture and databases in a multi-tenant architecture
• Familiarity with platform engineering and internal developer platform design
• Experience in fintech, lending, payments, or regulated enterprise environments
• Experience with tenant-based architecture
• Experience building AI-enabled back-end systems, agentic architectures or LLM infrastructure
• Experience with high-scale event streaming and messaging systems (SNS/SQS, RabbitMQ etc)
• Experience with data modeling, data architecture and databases in a multi-tenant architecture
• Familiarity with platform engineering and internal developer platform design
• Experience in fintech, lending, payments, or regulated enterprise environments

Why work with us:

• Great work-life balance
• Competitive remuneration package
• Exceptional social package & special discounts
• Supplemental health & dental care
• Team bonding events
• Excellent office location & facilities
• Relaxing & gaming areas
• Free bike parking & showers

How to apply:

If you recognize yourself in this role, please send your CV in English.

Our team would be excited to get in touch if your skillset and experience match the profile we look for.

Of course, all applications will be treated as strictly confidential.