Senior Solutions Architect
A Senior Solutions Architect designs the technical architecture of an online store's platform and integrations so that business goals are met in a scalable, secure way with a clear total cost of ownership.
What a Senior Solutions Architect does
A Senior Solutions Architect is the technical lead who turns business goals into system architecture: how the catalog, cart, payments, warehouse, CRM and analytics connect, which services to build in-house and which to buy off the shelf. In e-commerce and adjacent high-risk verticals, where payment providers, antifraud systems and marketplaces set the rules, this role ensures the system handles peak loads and doesn't break when integrations change.
The role is needed by companies that run several stores, brands or geographies, work with multiple payment providers, and are growing to the point where a monolith can no longer keep up. The architect defines service boundaries, data storage schemes, queues, caching and fault tolerance, and aligns these decisions with product, security and finance.
The architect usually reports to the Head of Engineering or CTO and works closely with development team leads, product managers, DevOps and security specialists. The role leads technical decisions rather than people: it involves architecture reviews, writing standards and mentoring middle-level developers.
Responsibilities
- Design the target architecture of the platform: modules, services, event queues and boundaries between domains.
- Assess build-or-buy options for payment gateways, antifraud, PIM, OMS, search and recommendation engines.
- Describe integrations with payment providers, ERP, warehouses, delivery services and marketplaces, including error handling and retry logic.
- Conduct architecture reviews of tasks and pull requests, and approve changes that affect several teams.
- Build performance and fault-tolerance requirements for peak periods such as sales, email campaigns and seasonality.
- Agree with security and compliance teams on how personal and payment data is stored and processed.
- Translate product and marketing requirements into technical tasks, time and cost estimates, and total cost of ownership.
- Maintain architecture documentation: diagrams, Architecture Decision Records (ADRs) and technical standards for teams.
- Take part in incident reviews and plan the reduction of technical debt and migrations.
Skills
- Systems thinking and an understanding of how e-commerce domains are connected
- Designing distributed systems and APIs (REST, event-driven architecture)
- Understanding of databases, caching strategies and queues
- Evaluating total cost of ownership and build-or-buy trade-offs
- Knowledge of information security practices and PCI DSS requirements at the architecture level
- Communicating with non-technical audiences and defending decisions to the business
- Mentoring and developing engineers
- Reviewing vendor technical terms and negotiating with vendors
Tools
- C4 and UML diagrams
- Confluence or Notion for ADRs and documentation
- Git platforms (GitLab, GitHub)
- Kubernetes and cloud provider consoles
- Kafka or RabbitMQ for event-driven architecture
- Prometheus and Grafana for observability
- Jira for planning and tracking technical debt
How performance is measured
- Share of key features released without architectural rework
- Availability and response time of critical services during peak periods
- Number of incidents linked to architectural decisions
- Total cost of ownership of the platform and share of technical debt in the backlog
- Time to approve architectural decisions and speed of connecting new providers
- Quality of architecture documentation and teams' adherence to standards
By vertical
E-Commerce
In e-commerce, the architect most often owns the connection between the catalog, storefront, cart, payments and warehouse under seasonal peaks and frequent promotions. Integrations with payment providers, antifraud systems and logistics are especially important, as is resilience to sudden traffic spikes.
Levels
Senior
A senior architect is responsible for the architecture of entire domains or several products, makes decisions whose consequences last for years, and sets development standards across the company. They choose technologies and own the consequences, but major decisions are agreed with management and product.
How to get there
Architects most often come from backend or fullstack development, DevOps, system administration or technical analyst roles. It is important to have experience with production systems where you were personally responsible for a service's operation, not just writing code assigned to you.
To make the transition, study distributed systems, database design, cloud infrastructure, security basics and integration patterns. Practice writing architecture decision records and diagrams for real tasks on your team, and work through build-or-buy evaluations.
Growth comes through ownership of a module or domain, then through leading large technical initiatives and mentoring. It helps to take part in architecture reviews, write technical standards and join incident reviews, since these show the quality of your decisions.
Next steps: Lead Solutions Architect, Principal Solutions Architect, Staff Engineer, Engineering Manager, Head of Architecture
FAQ
How does a Senior Solutions Architect differ from a regular architect?
A senior architect is responsible for the architecture of several domains or products and influences standards across the entire engineering team. A regular architect usually works within a single project or area and agrees on decisions within its scope.
Do you need to know programming to become an architect?
Yes. A deep understanding of code and hands-on development experience are required, otherwise evaluating decisions will be superficial. An architect does not have to write production code every day, but must be able to read it and verify decisions in practice.
What background is needed for the role in e-commerce and high-risk verticals?
Experience with high-load systems, payments, integrations and security requirements matters most. Knowledge of antifraud specifics, working with providers and seasonal peaks greatly speeds up entry into the role.
What determines an architect's income?
Income depends on the scope of responsibility, company size, region, platform complexity and the scarcity of the required skills. It is also strongly affected by whether the specialist leads technical decisions for large products or works within a single team.
What does an architect do each week?
A typical week includes architecture reviews of tasks, meetings with product and business teams on new features, discussions of integrations with contractors and work on documentation. Some time goes to incident reviews and mentoring developers.
Looking for a job in the industry?
Post an anonymous resume in our bot — recruiters from iGaming, payments and crypto search it every day.