Viacheslav Kostin
CEO WislaCode Solution
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Server-Side Development
Unlock the full potential of your applications with WislaCode server-side development services.
Why Choose WislaCode for backend development?
At WislaCode, we specialise in creating scalable, secure and efficient server-side solutions tailored to your business needs. With years of experience in backend engineering, we build robust infrastructures that deliver reliability and adaptability for your projects.
Our team is proficient across a wide range of technologies and frameworks, enabling seamless integrations and custom solutions. We prioritise close collaboration, clear communication and continuous support to deliver backend development services that empower your applications for long-term success.
Data access and persistence that scale: We design reliable database interactions using sound data modelling, transactions, and indexing. Solutions span SQL and NoSQL stores, with sensible use of ORM, caching layers, and read/write separation where needed. The outcome is fast, predictable access patterns that support growth without compromising integrity.
Security and data integrity: Baked in Encryption in transit and at rest, strict RBAC, input validation and secrets management come as standard. We follow OWASP ASVS practices, add tamper-evident logging and apply policy-based retention. Compliance needs are considered early, so security supports delivery rather than blocking it.
Domain‑driven business logic: We implement clear, testable business logic that reflects your rules and workflows. Use cases, validation, idempotency, and audit trails are built in, so complex processes remain understandable and maintainable. This keeps server-side development services aligned with measurable outcomes.
API design and integration without friction: We provide API development and integration services across REST and GraphQL with consistent versioning, pagination, and error contracts. Rate limiting, observability, and documentation (OpenAPI) make services simple to consume. Stable adapters connect to CRM/ERP, payments, and messaging systems without brittle links.
Key Benefits of Server-Side Development
We specialise in PHP, ASP, ASP.NET, and other leading technologies to meet diverse project requirements. Our mastery of both open-source and proprietary stacks enables tailored backend development services that integrate third-party APIs and extend functionality.
Our expertise in industry-standard frameworks underpins performance, scalability, and reliability. By leveraging optimised code, scalable architecture, and best practices, we reduce time to market and improve maintainability.
We include you at every stage – from planning to execution. This keeps things clear and aligned with your goals. Our team teaches stakeholders, gives regular updates, and manages server-side hosting smoothly.
With optimised database design and real-time data synchronisation, our solutions elevate application performance and security. We implement advanced data modelling and indexing strategies to meet complex requirements and growth.
Hire a cost-effective team of developers
Management & Analytics
Cost of works management and analytics team
€
18-50
/man-hour
Project management
System analytics
Business analytics
The project team will be formed after the software development roadmap is approved.
Developers
Cost of works development team
€
22-65
/man-hour
Mobile app development (Android, iOS)
Backend software development (Java)
Frontend development (JS, React)
Database development
DevOps
The project team will be formed after the software development roadmap is approved.
UI/UX and Testing
Cost of works UI/UX and testing team
€
14-56
/man-hour
UI/UX design
Manual software testing
Automated software testing
The project team will be formed after the software development roadmap is approved.
We align on outcomes, SLAs and compliance, then choose the right architecture (monolith vs microservices, event‑driven where it helps). We map domains, data models, storage (SQL/NoSQL), queues and caching, with clear throughput/latency targets and cost constraints.
Planning
Analysis
Quality is enforced via unit, integration and contract tests, plus load/soak and failure drills (timeouts, retries, chaos). Consumer‑driven contracts and realistic test data validate API behaviour before release, cutting regressions for frontend and partner teams.
Testing
UX Research
We design clean APIs and resilient services with idempotency, back‑pressure and safe concurrency. Infrastructure as code, secure secrets, observability (metrics/logs/traces) and automated migrations keep the stack predictable, fast and straightforward to evolve.
Design
Development
Blue‑green/canary deployments with instant rollback protect uptime. We ship with SLOs, actionable alerts and runbooks, then monitor latency, error budgets and cost. Post‑release tuning and scheduled upgrades keep performance, reliability and security on track.
Launch
Support
Case: powering a fitness PWA with a resilient backend
Monetech planned to enter a new market with its product, $lana, an online lending app.
We partnered from discovery interviews to prototype and delivery, building the server-side services that underpin the progressive web application. Our partner had a high‑level concept for a payday loan (PDL) system and needed a team to develop the frontend and backend.
The first release shipped in five months with a backend designed for reliability and easy evolution.
Why WislaCode?
We target performance, resilience, and maintainability from the first sprint. Coding standards, comprehensive tests, and peer reviews reduce defects and keep change velocity high – ideal for enterprise server-side development services.
Engineering discipline you can trust
We set budgets, profile hot paths, and eliminate bottlenecks. Sensible caching, asynchronous processing, and connection pooling keep latency low. Horizontal scaling strategies are proven in load tests before go-live.
Performance and scalability by design
We integrate with identity, billing, analytics, and internal systems via stable contracts and idempotent operations. Versioned interfaces and contract tests ensure updates land safely, reducing downtime and surprises during rollouts.
Integration fluency, predictable delivery
Clear communication, shared roadmaps, and transparent metrics keep stakeholders aligned. We document architectures and runbooks. We provide knowledge transfer and can stay as a partner or hand over smoothly to your team.
Collaboration and ownership
FAQ about backend development
We start with domain boundaries, team structure, release cadence, and non‑functional needs. A well‑structured monolith often ships faster and is simpler to operate early on. Microservices suit independently evolving capabilities or specific scale and isolation requirements. We take an evolutionary approach. First, we clarify boundaries in a modular monolith. Then, we extract services when the benefits of operation or scaling clearly outweigh the costs.
Security is built in. This includes: Least-privilege access, encryption in transit and at rest, secrets management, strict input validation. We implement audit logging, change tracking, and incident runbooks. Data residency, retention, and access policies apply at both the storage and API layers. We align with frameworks like OWASP ASVS. We also support audits using documentation and evidence from CI, testing, and observability.
We design APIs around clear resource models and error contracts, with pagination, filtering, and rate limits defined upfront. OpenAPI specs drive documentation and client generation. Developers prefer backward-compatible changes; they release breaking changes under new versions with deprecation timelines and monitoring. This keeps integrations stable while allowing the platform to evolve predictably.
Choice follows data shape, consistency needs, and access patterns. We usually use PostgreSQL or SQL Server for tasks that need strong consistency and complex queries. NoSQL options suit high-throughput, schemaless or document-centric use cases. We focus on modelling, indexing, connection management, and backups first – technology comes second to clarity of requirements and operational simplicity.
Yes. We develop adapters or use proven connectors, ensuring authentication, idempotency, and observability are consistent. We prefer event-driven syncing where appropriate to reduce coupling and keep data fresh. Contract tests protect against provider changes, and phased rollouts with canary traffic reduce risk during deployment.
We profile end-to-end, then address the fundamentals: efficient queries, caching, batching and asynchronous work for slow operations. Timeouts, retries and circuit breakers handle downstream issues gracefully. Load tests validate capacity and inform autoscaling. In production, dashboards track latency, error rates and saturation so we can spot regressions early and tune before users feel pain.
Absolutely. You can hire backend developers or a dedicated squad to work within your tooling, standards, and CI/CD. We agree on common KPIs, align our coding practices, and share documentation and handover. This gives you immediate capacity with low onboarding friction while preserving internal ownership of the roadmap.
Viacheslav Kostin, CEO
20+ years of experience in managerial positions in IT and banking.
Viacheslav Kostin, CEO
Previous roles: CEO in IT, Director of Strategy and Marketing in Banking, Curator of Holding Banks, Head of Products and Project Office.
Education: MBA for Executives at IMD (Switzerland), Leading Digital Business Transformation (IMD). Provides consulting in strategy and digital transformation.
Vasil Pahomov, CTO
20+ years of experience as a developer, analyst, and solutions architect.
Vasil Pahomov, CTO
Designs resilient, high-load systems with multiple integrations for banks and financial institutions. Expertise in distributed storage and microservices architecture.