To My 20-Year-Ago Self: 7 Things That Would Change My Career
With 20 years of system architecture experience, I share the turning points of my career and 7 things I wish I had known looking back. This is not advice, but…
202 posts
Career development, work life, leadership and professional growth experiences.
With 20 years of system architecture experience, I share the turning points of my career and 7 things I wish I had known looking back. This is not advice, but…
With 20 years of system architecture experience, I examine the place of a university degree in the software world and its pragmatic realities.
Transitioning to a management position isn't a one-way street as commonly believed. My own experiences show that returning to technical roles is possible and.
Examining the effectiveness of AI code assistants in software development, comparing GitHub Copilot, Cursor, and Claude Code based on my own experiences to.
With 20 years of experience, I explain how the concept of 'senior' is no longer tied to years, but redefined by system understanding, workflow mastery, and.
The reasons behind my transition from a management position back to a technical career, the challenges I faced, and the lessons I learned.
Sharing the story of an engineer's most costly 'yes' decision in their career, with lessons learned from 20 years of experience.
While the rise of AI sparks fears of job losses, many companies continue to invest in junior talent. This post explores the reasons behind this trend and its.
I've conducted hundreds of job interviews. Most candidates had memorized technical information, but only one truly impressed me. Why? Because of their.
In the AI-transformed tech world, the meaning of 'senior' is changing. Experience, problem-solving, and workflow mastery are more important than prompt.
I examine how over-reliance on AI tools dulls our professional skills, with examples from my 20 years of field experience. In the long run, this…
5 critical lessons distilled from my 20 years of career experience, which I'd tell my junior self.
With 20 years of experience, I explain how developers should position themselves in the AI era, emphasizing the importance of technical depth and real.
With 20 years of experience, I evaluate how AI will affect the future of developers and what the real risk is.
The developer's role is quietly shifting from writing code to becoming a 'foreman' who holistically manages systems and workflows. This transformation.
AI agents, MCP, tool calling feel brand new — but to anyone who ran an Eggdrop bot on IRC, it's familiar. The real shift wasn't tech, but access to knowledge.
One night a storage system died and I realized the problem was never the disks — it was assuming nothing would fail. On assumptions, trust, and safety.
I compare the costs of self-hosting versus cloud computing based on my experiences. Real numbers, trade-offs, and which is more profitable in different.
Exploring the software developer salary gap in Turkey, the profound differences between the 95,000 TL and 175,000 TL levels, and the systemic reasons behind.
The 38% rate of candidates cheating in technical interviews with unseen AI tools questions the future of hiring processes. This situation...
Exploring the potential of Passkeys in both the individual and corporate world, their technical details, and the real challenges in adaptation processes, based.
I share my experiences with 5 critical self-hosting projects that infrastructure specialists can undertake on their own servers to gain real-world experience.
A pragmatic perspective from my 20 years of field experience on the difficulties junior developers face in finding jobs and the reasons behind this situation.
In light of 20 years of experience, I discuss the impact of AI tools on my engineering career, the areas they've accelerated, and the importance of critical.
I compare AI's promised acceleration in software development with the actual decrease in productivity observed in the field. Why did we slow down, and how can.
I'm sharing the unique value that managing my own servers has added to my tech career, even in the cloud era, and 5 essential skills.
As an indie hacker, I explore software architecture choices: balancing the easy start of a Monolith with the flexibility of a Modular Monolith, based on my own.
Drawing from my 20 years of experience in system architecture, networking, and software development, I share what truly lasts in a changing tech world...
Being on-call for distributed systems can be stressful due to unexpected incidents and constant alerts. Here are 5 practical tactics to reduce that stress.
With 20 years of system architecture experience, I look for much more than just what's on a candidate's resume. What catches my eye first during hiring? Based.
With 20 years of system architecture experience, I compare the cost of building your own platform against the advantages of using ready-made solutions. An.
Strategies for detecting, filtering, and managing the high cardinality issue that inflates costs and disks in metric infrastructures.
With 20 years of experience, I'm revealing the biggest lie in the software world: how chasing perfect code hinders real success and the pragmatic approach…
With 20 years of experience in system architecture and operations, I'm still discovering and learning many things in the IT world. In this post, I'll share.
In my 20-year career, one of my most valuable lessons wasn't about technical knowledge, but about understanding my own limits and the cost of saying 'yes'.
With 20 years of system architecture experience, Mustafa Erbay discusses the true value of an idea, the most expensive mistake in his career, and the pragmatic.
Take a deep dive into the alternatives, use cases, and trade-offs of locking mechanisms in distributed systems.
I explain the three practical idempotency strategies I use to prevent duplicate requests in distributed architectures, with production experiences and code.
In my 20 years of system architecture and software development experience, I've made some big entrepreneurial mistakes beyond just technical knowledge. Here.
With twenty years of experience, I explain how the real challenges in a software project extend far beyond writing code. The impact of people, processes, and.
I analyze how adopting an offline-first architecture in mobile applications increases long-term support costs rather than just development efforts.
In my career, I've learned that the difference in difficulty between building a great product and marketing it isn't what we often think. Here are my.
A bold look at the current state of software engineering with 20 years of system architecture experience. With real experiences and a pragmatic approach...
Learn how to respond quickly and effectively to critical CVEs in the kernel with a practical 3-step approach.
I analyze 3 steps infrastructure managers should prioritize when responding to critical kernel CVEs, based on field experience.
I explore how far network certifications can actually carry you in your career, and why field experience and deep knowledge are much more critical.
A 3-step guide to optimizing supply chain data flow in manufacturing ERPs, covering database, transaction queues, and network segmentation.
Why commercial Application Performance Monitoring (APM) tools are disproportionately costly, especially for solo developers and small teams...
I examine what happens when we don't define the boundaries of our work in infrastructure and network consulting, in 3 steps from L2/L3 layers to DNS.
I examine the balance between simplicity and flexibility when choosing among API versioning strategies, drawing from my own experiences. Which approach works.
With 20 years of system architecture experience, I explain how the most expensive mistake of my career wasn't a line of code, but a 'yes'. A thought-provoking.
An in-depth guide to mobile application API versioning strategies, the impact of technical debt on careers and projects, and best practices.
I analyze the complexities and operational costs of VPN dual-stack implementations based on my own experiences.
I'm sharing candidly how the 'BurnCPU' idea, one of the turning points in my career, was born, the problems I faced, and what it taught me.
Striking the right balance between monitoring and alerting in system and application operations has always been challenging. In this post, I'll explain my.
One of the biggest decisions in my career was to build my own social network. I'm sharing why I embarked on this journey, my expectations, and what I learned.
I explore BGP route flap issues, their impact on network stability, and how I've managed such incidents in my own operations, drawing from my experiences.
I examine the challenges of dependency vulnerability management in small projects, the patterns I've encountered, and my pragmatic solution approaches.
Is Offline-First architecture a must for every application? Based on my own experiences, I'll discuss the advantages, costs, and real needs of this approach…
Learn how to implement distributed lock mechanisms in your side projects using simpler and more pragmatic methods.
I'm discussing the costs associated with high cardinality metrics and practical ways to manage them. Balancing the level of detail and cost…
My experiences with how monorepo and polyrepo choices in software projects affect CI/CD processes, team dynamics, and long-term project health…
My experiences with architectural trade-offs and their operational costs when designing AI agent tool-use capabilities.
I explain the differences between consistency models in distributed systems, when I chose which one in my own experiences, and their trade-offs.
An in-depth analysis of the principle of least privilege's impact on operational speed, security risks, and practical applications.
Choosing a software architecture determines a project's fate. I'll share my experiences with the trade-offs between monolithic, modular monolith, and.
What RED metrics are, when they are needed, and whether they are always comprehensive...
I examine the quality of Retrieval-Augmented Generation (RAG) systems in my side projects and whether it always needs to be at the highest level...
Based on my experience, I analyze the costs, efficiencies, and operational burdens of CI/CD deploy strategies in detail.
I examine the operational burden of distributed locks, the hidden costs they impose on on-call engineers, and simpler alternatives.
MTU, DNS leaks, and routing issues I encountered while trying to run IPv4 and IPv6 in the same VPN tunnel. Solutions proven by experience.
Learn how to resolve network connectivity issues by configuring IPv4 and IPv6 simultaneously in your VPN. Detailed steps and practical tips.
What is cardinality explosion in monitoring systems, why does it happen, and how does this situation affect both systems and an engineer's career? Practical...
Trade-offs to weigh when choosing and implementing multi-tenant architecture in ERP systems: cost, data isolation, and scalability, from real experience.
Correctly setting log levels in our systems requires striking a critical balance between detailed monitoring and reducing unnecessary noise. This…
I explain how the convenience of ORMs negatively affects database performance, especially in enterprise applications, using my own field experiences.
Exploring defense mechanisms against prompt injection attacks targeting large language models and the associated costs...
Effective management of log levels is critical for system health and troubleshooting processes. In this article, we explore the necessity of the debug level.
I explain how I set up CI/CD processes in my side projects using pragmatic approaches and the challenges I encountered during these processes.
I analyze the practicality of shared build cache solutions for independent developers in terms of cost, performance, and maintenance. From my own experiences...
I provide a pragmatic perspective by examining the cost and performance limits of AI agents' tool usage with real-world scenarios.
I delve into 3 different strategies you can use when transitioning from a monolithic to a modular architecture, examining their trade-offs and providing.
I'm sharing the 3 core reasons that convinced me to transition from a monolith to a modular monolith in enterprise software architecture, along with my.
Comparing the impact of Monolith and Microservices architectures on CI/CD processes, with practical experience. Deciding when to choose which.
How often should you patch kernel CVEs while meeting your SLA commitments? I took a deep dive into the costs and risks involved.
I analyze the benefits and costs of database partitioning. When should you partition, and when should you avoid it? I share my experiences.
I examine three critical challenges in the Linux kernel CVE patching process, with concrete examples and practical solutions.
I explain the fundamentals, causes, and practical solutions for BGP route flap issues based on my own experiences. Why theoretical solutions are challenging in.
I explore the burden of working with eventual consistency in distributed systems on developers and my approaches to managing this situation.
Based on my hands-on field experience, I compare GitOps and push-based CI/CD approaches. Which one should we choose for different scenarios?
Analyzing when offline-first synchronization in mobile apps is a necessity and when it's a luxury for indie hackers. Real-world scenarios, cost analyses, and.
Learn modern secret rotation practices to keep your systems secure. In this guide, we will walk through the process step-by-step.
Analyzing pager fatigue and the shortcomings of excessive alerting systems with my operational experience accumulated over the years. Real problems...
The importance of database transaction isolation levels in real-world applications, the problems I've encountered, and how the right choice impacts my career.
Explore the unseen costs of complex CI/CD pipelines, maintenance challenges, and consultancy expenses through Mustafa Erbay's pragmatic perspective...
I'm sharing the switch hardening steps that form the foundation of network security based on my own experiences: DHCP Snooping, DAI, and IP Source Guard.
A guide from my personal experiences on team stress, technical debt, and trade-offs encountered when choosing deploy strategies.
I explore the operational and technical challenges behind the seemingly attractive initial costs of multi-tenant ERP solutions, drawing from my own experiences.
A deep dive into the risks, costs, and practical applications of Blue/Green and Rolling deployment strategies in software delivery.
I explain step-by-step a security vulnerability encountered during a client project and how I patched it on my own VPS. Lessons from field experience.
How does a system not being 'up' in consulting projects erode customer trust? I address this topic with practical approaches and my experiences.
I deeply investigated Docker disk space issues on a small VPS, from image layers to logs, and shared practical solutions.
I share the panic I experienced when my VPS crashed during a critical client meeting and the process of resolving it. Technical details and lessons learned.
From OOM scenarios on my own VPS to Docker disk fires, why system architecture is a discipline that requires constant vigilance…
The chaos of running multiple side projects at the same time, and the story of pushing through anyway after learning from the mess.
The decisions, trade-offs and experiences I rely on to avoid overengineering traps in my own indie projects.
A personal take on inflation and data reliability. Drawing on the data problems in my own projects to explain why Turkey's cost-of-living numbers feel off.
Why scraped listing data doesn't reflect the real market, plus the technical challenges of data cleaning — from my own experience.
Problems I hit, lessons I learned, and the small tweaks behind my AI-driven content pipeline. From VPS to GitHub Actions, real field experience.
Examining how hard it is to get salary data in Turkey, in light of my personal observations and data experience.
An in-depth guide to the long-term costs of emergency fixes and an architect's experiences on the topic.
Explore — through Mustafa Erbay's lens — the idempotency concept and the crisis that turns into an operational nightmare in the complexity of distributed…
Learn the causes, effects of clock drift in distributed systems and the methods used to solve it through a detailed examination.
Discover the causes and risks of IAM role mess in cloud environments and the ways out of this swamp. Best practices for a secure cloud infrastructure...
Dig deep into the unexpected effects of Sentinel-based firewalls in production and these 'hidden wars.' Strategies and solutions.
Discover the critical importance of DNS and how a single wrong record can lead to massive disasters. How to manage these risks in your career and operations...
Tackling technical debt is not just about writing code, but also about diplomatic communication with stakeholders. Discover an engineer's role in this process.
My disk-cleanup.timer wiped the runner's _work/_temp directories. For 16 hours every cron exploded with 'Missing file: set_output_*'. A confession of…
Explore the causes and consequences of cross-team tension during a critical incident, and the steps needed to manage it. Effective leadership…
A deep dive into the destructive effects of architectural (technical) debt that we encounter so often in software projects, and how a project gets dragged…
Learn how stale data hurts performance in high-traffic applications and the ways to break out from under that curse.
Explore the challenges of state management in cloud environments and the battles fought in this space, told from an SRE's perspective.
An old internal load balancer fails unexpectedly — and shapes the technical and career-defining test it puts an engineer through.
In a world where we keep pushing the limits of automation, what is the cost of losing the human factor? Technology and the future from an old engineer's…
Learn how you can unintentionally take your systems down while trying to save them, and how to avoid the Failover Paradox.
An in-depth guide to API gateway scaling problems, the complexity of system architecture, and how these wars affect your career.
Migrating from monolithic architecture to microservices isn't just a technical transformation — it's a deep cultural shift. Through DevOps principles, in…
Learn about the unexpected challenges of auto-scaling and how, as a capacity engineer, you can avoid these traps.
Examining the invisible burden technical debt places on DevOps teams and its operational cost, with strategies for managing it.
Learn the challenges and strategies of managing security vulnerabilities effectively as a leader. Use this guide to turn crises into opportunities.
A detailed look at the 'zombie process' problem in production environments and how to analyze and resolve this hidden form of resource waste.
What is cloud vendor lock-in? The career risks for engineers and the strategies that help you avoid getting stuck.
Explore the silent crises caused by disk space saturation in production environments, their root causes, and proactive resolution strategies.
Discover why database migrations sometimes turn into decisions you can't undo, and what that means for your career. Detailed planning, risk…
Read Mustafa Erbay's take on the crises caused by ephemeral storage in the container world and how these instant memory wars affect your career…
Read Mustafa Erbay's account of the challenges of moving a monolithic SaaS to multi-tenancy, the lessons learned, and the strategies for success.
Discover the 'ghost bugs' caused by time sync differences in distributed systems. How they appear, how to diagnose…
A post-mortem after a major outage isn't just a technical review. Understanding and managing the psychological, invisible burden engineers carry through it…
How do hidden API Gateway limits cause unexpected issues in production? In this article, we explore strategies and practical solutions to prevent these.
Beyond the advantages Service Mesh offers, the often-overlooked performance costs and how they reflect on a software engineer's career…
Zero-day vulnerabilities are one of the biggest threats in modern cybersecurity. The tough fight security teams put up against this invisible enemy and…
Learn about server room nightmares and how physical infrastructure problems affect your career. Discover how to solve and prevent these issues.
Examine the challenges of database sharding decisions and possible architectural regrets through Mustafa Erbay's eyes. Technical depth and practical advice.
The rise of multi-cloud strategies has surfaced a real skills crisis on engineering teams, but it also opens up huge career transformation opportunities for…
Learn the causes of packet loss in multi-layer networks and how to deal with this hidden performance killer. Optimize your network performance.
We look at the single point of failure problem in system architecture through the lens of the risks created by a physically neglected server room.…
We look at the move from virtual machines to containers, the identity crisis traditional operations (Ops) is facing, and the new skills needed to keep up.
How a decision log, a steady handover rhythm, and a clean handoff flow keep context from getting lost when teams swap during long-running outages.
Discover that SRE is not just about technology, but also about human health and team well-being. A roadmap for moving from pager fatigue to a proactive…
An in-depth look at how overlooked load balancer configuration errors can wreck system stability and devastate engineering teams.
Explore the limits of automation and the indispensable role that the human touch, critical thinking, and empathy play in crisis management when systems…
Discover the challenges that technical debt and legacy systems bring, plus the human cost behind them. Save your career and your projects with practical…
A deep look at vendor lock-in risk in database choices, the visible and hidden costs of migration, and the strategies you can use to avoid these traps…
How hidden dependencies in systems lead to unexpected production issues, and the architectural lessons we need to take away to reduce those risks…
Discover the journey from the engineer's nightmare of Pager Burnout to amplified system resilience and sustainability through SRE principles.
Assuming the release is done is how you summon an incident. A practical framework for turning post-change verification into a cadence: fast smoke checks…
In big outages the largest risk isn't technical, it's coordination. How I drive MTTR down with the IC role, a steady comms cadence, and a practical runbook…
Moving privileged access past the 'who has it?' question into a working governance discipline built on JIT, break-glass, audit, and revocation.
An incident walkthrough framework and scoring rubric for measuring a candidate's real production reflex in SRE/Platform/Infra interviews.
Living through the failure in your head before going to production: pre-mortem cadence, a template, decision points, and operational leadership in practice.
Keeping production confidence while increasing deployment speed: a practical management cadence and team rhythm that combines DORA metrics with SRE signals.
Turning go-live from 'ship and pray' into something with clear risk, ownership, and rollback reflex: a practical ORR gate and checklist.
Cut incident duration caused by ownership ambiguity using a RACI-based service catalog: speed up on-call, change, and access decisions.
A toil budget approach for sustainable operations: measuring repetitive manual work, making it visible, and protecting time for improvement.
A practical framework that treats vendor lock-in not as 'fear' but a manageable risk, tying the exit plan into technical design and operational processes.
A postmortem isn't enough: an operational framework for a focused 7-day sprint that closes alert, runbook, risk, and communication debt.
How to keep architectural consistency while moving fast: short RFCs, clear ownership, time boxes, and a paper trail of decisions.
An evidence set, time standard, role assignment, and practical checklist to break the panic-driven 'SSH into one server' reflex.
A minimum template, thresholds, and practical examples for turning the runbook from a documentation pile into a tool that produces decisions during an incident.
Realistic on-call, escalation, and runbook design that reduces pager fatigue, speeds up decision-making, and clarifies incident communication.
A leadership approach that turns incident drills from purely technical tests into shared decision-making and communication practice.
A practical cadence for surfacing the implicit operations knowledge that keeps systems alive — without leaving it tied to a handful of people.
A leadership approach that ties alert noise to team learning, on-call health, and operational quality — instead of just shaving the count down.
A short, measured, leadership-focused session model for rebuilding the team's delivery confidence after a risky release.
A clear framework of roles, thresholds, and communication paths for spreading the tech lead's decision load during Sev2 incidents.
A leadership practice that frames technical risk through decision impact and business outcome — not through alarm language.
An approach that turns technical debt from a complaint topic into something negotiable across budget, risk, and delivery planning.
A blameless leadership framework that takes escalation decisions out of personal reflexes and manages them with clear thresholds.
A decision log approach that lifts architectural and operational choices out of personal memory and turns them into something a whole team can carry.
How to rebalance recovery, debt, and delivery after an outage without blindly inflating the backlog.
A guide to building sustainable income and reputation in freelance work through niche selection, pricing, scope management, and a reliable delivery rhythm.
A technical leadership approach to runbook debt management that moves operational memory off individuals and onto the system.
A handover model that moves service knowledge into operable contracts rather than individuals strengthens continuity in technical leadership.
A clear framework for the technical leadership practice of negotiating capacity without getting crushed between delivery pressure and operational load.
A weekly leadership cadence that matures operational culture by reading alarm noise, runbook debt, and team load on the same dashboard.
A technical leadership framework for safe releases in enterprise teams without depending on change windows.
A technical framework for designing command rotation to scale incident load without depending on the reflexes of a few people.
A delegation model for safely transferring critical operations knowledge instead of keeping it locked in one head.
A communication model, role boundaries and decision rhythm that accelerate cross-team information flow during outages.
A resistance mapping approach for spotting unspoken team objections early during platform transformations.
A technical leadership approach that turns change approval from a bureaucratic signature into an explicit risk contract.
A mentorship-driven operating model that uses shadow on-call to spread on-call knowledge across the team instead of locking it in one person.
A practical framework for technical leadership behaviors that stay calm under incidents, change pressure, and team tension.
The technical leader’s responsibility for creating a shared language between engineering, operations, and business units in platform transformation projects.
A leadership guide for transforming the postmortem process from a blame-finding meeting into a learning team practice.
A guide for treating your career not as a 'job title' but as an impact area and skill portfolio, and for building a 6–12 month plan with measurable steps.
With 20 years of experience, I question how AI tools like GitHub Copilot impact developer productivity and whether they lead to laziness.
A lesson distilled from twenty years of experience: My biggest mistakes weren't technical, but not knowing when to give up. How I fell into the perfectionism.
With 20 years of system architecture experience, I explain why most SaaS startups fail and what the right steps should be.
A personal experience on the limits of free speech on social media and how platform decisions impacted my career.
With 20 years of system architecture and software development experience, Mustafa Erbay deconstructs the 'perfect product' myth. Pragmatic approaches and.