EresusSecurity
Backend Development

Build secure, maintainable backend services with Node.js, Python, and Go.

Eresus provides delivery-focused backend development support for internal APIs, customer-facing services, worker flows, queue logic, auth layers, and business-critical workflows.

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Best fit

This engagement creates value fastest for teams like these.

Teams shipping under delivery pressure

Engineering organizations that need backend, mobile, DevOps, or DevSecOps support without losing security rigor.

CTOs and platform leads

Leads that need architecture, release, and operations support tied back to offensive validation priorities.

Programs that want build plus hardening

Buyers that do not want a separate delivery vendor and a separate security vendor working against each other.

Technology & scope

Node.js, Python, and Go service architecture
REST, gRPC, and event-driven backend flows
Auth, RBAC, session, and internal tooling layers
Workers, cron, webhooks, and queue-based processing

Delivery focus

Modules to deliver and service boundaries
Data model, failure handling, and observability
Internal integrations, admin flows, and job logic
Technical debt and hardening tasks required for safe release

Outcomes

Deliverable backend plan
Service and API contracts
Architecture direction and development notes for the codebase
Handover, documentation, and next-sprint recommendations
Delivery model

An implementation-ready engineering motion from scope to production.

01

Architecture and boundaries

We align service responsibilities, data flow, auth model, and which backend components will be delivered.

02

Implementation and hardening

We shape services, failure handling, integration security, and production readiness in Node.js, Python, or Go.

03

Handover and release readiness

The team receives documentation, release notes, technical-debt guidance, and next-sprint recommendations.

FAQ

The questions buyers want answered early.

How does Delivery Security integrate with offensive pentesting?+
Offensive validation identifies exploit paths; delivery security engineers embed directly alongside your team to implement architecture hardening, secure CI/CD pipelines, and infrastructure as code fixes.
Can you work within our existing agile sprint and release workflows?+
Yes. Our senior engineers operate inside your GitHub/GitLab repositories, Jira/Linear backlogs, and cloud environments, submitting secure pull requests and resolving security blockers without stalling product velocity.
What deliverables and handoff documentation do you provide?+
You receive production-ready code PRs, automated security linting/testing pipelines, infrastructure hardening templates (Terraform/Kubernetes), and comprehensive architecture runbooks for your internal engineering team.
What are the engagement options and timelines?+
We offer sprint-based embedded engineering (2-8 week focused security implementation sprints) as well as fractional DevSecOps & Security Architecture advisory retainers.
How do you ensure secrets and infrastructure credentials remain secure?+
We work exclusively through client-managed least-privilege IAM roles, temporary ephemeral credentials, and encrypted communications under strict mutual NDA and security SLA agreements.

We build backend systems with clear boundaries and maintainability.

The goal is not just to write code. We make service responsibilities, failure surfaces, and future change-cost explicit from the start.

Delivery works for engineering and operations together.

Code, documentation, release preparation, and operating notes ship together so the team gets a sustainable backend, not a demo.

Related proof

Research and advisories that support this service motion.

Research

Structuring and Securing AI Microservices in Python (FastAPI)

Why must you transition from monolithic setups to a microservices architecture when exposing AI models to the public? Designing attack-resistant Python...

Research

Why Should We Use Rust for AI-Powered Backend Systems?

When AI assistants are writing half your code, how do you ensure system security? Discover the superiority of the Rust language and its Memory Safety...

Research

The Silent Assassin of Modern APIs: BOLA / IDOR Vulnerabilities and Their Impact

Why does the undisputed leader of the OWASP API Top 10, Broken Object Level Authorization (BOLA/IDOR), constantly evade WAF and DAST scanners? Defending...

Advisory

Zero-Day Analysis: Authenticated SSRF in n8n-mcp (GHSA-4ggg-h7ph-26qr)

Authenticated SSRF in n8n-mcp multi-tenant HTTP mode allows attackers with a valid token to force server-side requests to internal and cloud metadata resources.

Next step

Let’s scope this work against the surface that matters most.

Whether this starts as a pilot, a single application, a critical API, an AI agent flow, or a wider program, we start from the highest-impact surface.

Book a security briefingRequest a scope review