gabortill.com

Help software engineers become strategic leaders through personalized coaching and actionable strategies.

Created Tech Lead Mastery, a 6-month interactive program helping engineers master leadership skills and career advancement.

Host workshops and events that teach engineers how to build high-performing teams and influence stakeholders.

Provide tailored resources to simplify leadership and career growth for mid- and senior-level engineers.

Founder of Tech Lead Mastery | Leadership Coaching for Engineers

Atradius

When Atradius embarked on the transformative journey of bringing IT development in-house, I was entrusted with the task. Spearheading the inaugural in-house team in the Channels division was both a challenge and an honor. From hiring to setting up processes and ensuring efficient deliverables, I've fostered a culture of excellence. Today, with a mix of talent from Amsterdam to Madrid and beyond, I'm cultivating the future tech leaders of the industry. Building teams, bridging geographical gaps, and aligning with long-term goals — that's a day in my life at Atradius.

Engineering Manager

VodafoneZiggo

Reforming a dynamic team at Vodafone, I took on the mission to migrate the extensive Vodafone Enterprise Portal. From AngularJS to React and introducing NestJS middleware, our tech overhaul was comprehensive. As a Scrum Master, I introduced agile methodologies, ensuring that team dynamics were at their peak and individual performances shined. Weekly conversations with Agile Coaches and regular strategic meetings ensured we stayed ahead of challenges.

Scrum Master & Frontend Developer

Veen Bosch & Keuning Uitgevers Groep B.V.

Stepping into the vast world of the largest publisher in the Netherlands, I had my eyes set on innovation. Leading the rewrite of bookchoice.com and bruna.nl wasn't just about code; it was about crafting user experiences. Beyond projects, I had the privilege to step into the shoes of my mentor, inheriting the wisdom and challenges of being an Engineering Manager. From introducing a Scrum scoring system to spearheading remote work strategies during the COVID era, I was at the forefront of change.

Engineering Manager & Lead Frontend Developer

Harlem Next B.V.

I wore two hats: A Lead Front-end Developer and a Mentor. Crafting landing pages and dashboards with Vue.js was one part of the job; mentoring three budding engineers was where my passion truly shone. Together, we navigated the worlds of technology and soft skills, ensuring they were equipped for the challenges of tomorrow.

Lead Frontend Developer & Mentor

Joining KPN was a lesson in the power of Scrum done right. While developing in-house products, I had the opportunity to introduce innovative concepts like Feature Flag, ES6, and the BEM naming convention. It wasn't just about code; it was about improving processes and enhancing user experiences.

AngularJS Front-end Developer

comScore, Inc.

My journey abroad began with comScore in Amsterdam—a milestone that significantly amplified my professional growth. Here, I was entrusted with maintaining four intricate analytics tools, akin to giants like Google Analytics. Working with AngularJS, I delved into the complexities of constructing expansive applications that demanded efficiency and performance. Though the acquisition by Adobe marked an unforeseen chapter's end, the learning and experiences at comScore solidified my foundation in front-end technologies and large-scale application development.

JavaScript Developer

Westline Webworks Ltd

At Westline, innovation met opportunity. Entrusted with a pioneering video-based project, I dived deep into the world of HTML5 video and AngularJS. Crafting a robust app tailored for mobile and tablet users was both challenging and rewarding. Navigating through the relatively new territories of AngularJS and HTML5 video was a testament to my passion for exploring the uncharted.

Front-end developer

BIG FISH Internet Technology Ltd

Joining BIG FISH, I was promised expansive opportunities to work with JavaScript. Although we embarked on an exciting project to redesign Hungary's largest online bookstore, the nature of the role didn't align with the vision I had. Our paths diverged as I became more determined to find a role that genuinely resonated with my expertise and aspirations.

arukereso.hu

My foray into the professional IT realm began at árukereső.hu. With the burgeoning mobile era, I championed the redesign of the platform's mobile interface, working hands-on with technologies like PHP Smarty, jQuery, Less CSS, and HTML5. It was an enlightening phase, witnessing the onset of revolutionary JavaScript frameworks. However, when my aspirations leaned more towards JavaScript, I realized it was time for a new chapter.

sitebuilder

People & Process Driven Freelance Engineering Manager | Cultivating High-Performing Dev Teams Across Borders

I’m Gábor, and I help mid- and senior-level software engineers to become impactful tech leaders.

I started my career as a web developer and, over the years, worked my way up to lead developer and then engineering manager. Along the way, I faced the same challenges many engineers encounter when stepping into leadership, such as balancing technical responsibilities with managing people, learning how to influence without authority, and making decisions that impact the bigger picture.

What made the difference for me was a mentor who helped me navigate these shifts. That experience saved me years of trial and error, and it’s why I’m so passionate about helping others who are ready to take their next big career step.

Through 1-on-1 coaching, I work with software engineers to:

👉 Prepare for leadership roles by building the right skills and mindset.
👉 Simplify the shift from coding to team leadership with actionable guidance.
👉 Overcome common hurdles like managing performance, communication, and trust.

I’ve been where you are, and I know how hard it can be to move forward when leadership feels exciting, but overwhelming. My coaching isn’t about theory—it’s about clear steps that help you grow into the leader your team needs.

If you’re a software engineer looking to take your career to the next level, let’s connect.

You will find lots of useful and free resources on my website at gabortill.com

Gábor Till

Author of System Design Newsletter (37K+ Subscribers)

My mission is to help you become good at system design

My portfolio:
→ I'm writing a weekly newsletter about system design
→ I've 10+ years of software engineering experience
→ I've worked at startups and big companies
→ I've mentored many engineers

My results:
→ 100,000+ software engineers learning system design through my newsletter

My newsletter:
→ newsletter.systemdesign.one/subscribe

Neo K.

If you want to become good at system design,
learn these 15 case studies (save this now):


1 How ChatGPT Works:
↳ https://lnkd.in/emyP63Wx

2 How Google Search Works:
↳ https://lnkd.in/exsvNqFn

3 How Uber Computes ETA:
↳ https://lnkd.in/eVKV2ePC

4 How Amazon S3 Works:
↳ https://lnkd.in/e2p7qXri

5 How YouTube Works:
↳ https://lnkd.in/e7q9F4Sg

6 How Kafka Works:
↳ https://lnkd.in/eTtVAjTg

7 How WhatsApp Works:
↳ https://lnkd.in/eU2fswMi

8 How Spotify Works:
↳ https://lnkd.in/eGbWVeNW

9 How Slack Works:
↳ https://lnkd.in/eATMDjrK

10 How Reddit Works:
↳ https://lnkd.in/egmm_P7a

11 How Bluesky Works:
↳ https://lnkd.in/eEhB8V_k

12 How Twitter Timeline Works:
↳ https://lnkd.in/eniXMPfU

13 How URL Shortener Works:
↳ https://lnkd.in/evFTZVQq

14 How Payment System Works:
↳ https://lnkd.in/ecVw7jfi

15 How Stock Exchange Works:
↳ https://lnkd.in/eNf2QxVZ

What else should make this list?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help other software engineers ace system design.
👤 Follow Neo Kim + turn on notifications.

Neo Kim

I Teach You System Design • 0.5M+ Audience

15 System Design Case Studies for Software Engineers

Top 25 AWS services explained in 2 mins or less:


Compute:

1 EC2
↳ Cloud virtual servers to run apps with full control over operating system.

2 Lambda
↳ Serverless compute that runs code in response to events without managing servers.

3 ECS
↳ Managed container orchestration service for running Docker containers.

4 EKS
↳ Managed Kubernetes service that runs and scales containerized apps.

5 Auto Scaling
↳ Automatically adjust compute capacity based on demand.

——

Storage:

6 S3
↳ Durable object storage for files, backups, media & static content.

7 EBS
↳ Persistent block storage volumes attached to EC2 instances.

8 EFS
↳ Fully managed shared file system accessible by different EC2 instances.

9 FSx
↳ Managed high-performance file systems - Windows File Server.

10 Snowball
↳ Using physical device to transfer large amounts of data into or out of AWS.

——

Networking:

11 VPC
↳ Logically isolated virtual network where you define IP ranges, subnets & routing.

12 Route 53
↳ Scalable DNS service that routes users to apps.

13 ELB
↳ Distributes incoming traffic across different servers for high availability.

14 CloudFront
↳ Global content delivery network (CDN) that caches content at edge locations.

15 Direct Connect
↳ Dedicated private network connection from on-premises to AWS.

——

Databases:

16 RDS
↳ Managed relational database service supporting engines like MySQL & PostgreSQL.

17 DynamoDB
↳ Fully managed NoSQL key-value database with low latency.

18 Aurora
↳ High-performance relational database compatible with MySQL & PostgreSQL.

19 Redshift
↳ Fully managed data warehouse for large-scale analytics.

20 ElastiCache
↳ In-memory caching service (Redis or Memcached) to reduce database load.

——

Security:

21 IAM
↳ Manages users, roles & permissions for AWS resources.

22 KMS
↳ Managed service for creating & controlling encryption keys.

23 Cognito
↳ User authentication & identity service for web and mobile apps.

24 GuardDuty
↳ Threat detection service that monitors AWS accounts & workloads.

25 WAF
↳ Web application firewall that filters harmful web traffic.

(That’s 80% of the services you need to know.)
What else should make this list?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others understand AWS services.
👤 Follow Neo Kim + turn on notifications.

5 ways to test system functionality
explained in 2 mins or less:


Testing is the process of verifying whether software works as expected.

1 Unit testing
↳ Test components individually to ensure each works as expected.
↳ Pro: Finds bugs early in development.
↳ Con: Cannot detect issues between components.

2 Integration testing
↳ Verifies if different components interact correctly when combined.
↳ Pro: Detects problems in service or module interactions.
↳ Con: More complex and slower than unit tests.

3 End-to-end testing
↳ Simulates real workflows from start to finish to confirm entire system works correctly.
↳ Pro: Validates the real user experience.
↳ Con: Slow and often difficult to maintain.

4 Performance testing
↳ Measures how fast, stable, and scalable the system is under different load levels.
↳ Pro: Prevents system failures under heavy traffic.
↳ Con: Requires realistic environments to be accurate.

5 Security testing
↳ Identifies vulnerabilities and ensures system cannot be exploited by unauthorized users
↳ Pro: Protects systems from attacks and data breaches.
↳ Con: Cannot guarantee complete security coverage.

What else would you add?

——

👋 PS - Want to build anything for the web, mobile, browser, scripts, or internal tools?

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They are infrastructure middlemen.
You're limited to their stack and must start over when you need a different tech.

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• You’re not locked-in to Supabase or Stripe.
• Not forced to spend credits, bring your own AI subscriptions with you.
• One-click deployment straight to Vercel

Try Orchids now to build anything you can put your mind to.
→ orchidsapp.link/neokim

(Use this discount code to get a one time 15% off during checkout: MARCH15)

———

💾 Save this for later & repost to help others build good apps.
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5 Types of Testing for Software Engineers

I built a GitHub repo to help you learn system design.
It gives you:


- System design foundations
- AI engineering fundamentals
- System design interview questions
- Deep dives into real-world architectures
- Simplified engineering case studies with visuals

——

👋 PS - STAR this repo right now if you find it valuable:
→ https://lnkd.in/eKATU6QV

———

💾 Save this & repost to help others ace system design.
👤 Follow Neo Kim + turn on notifications.

If you want to become good at API design,
learn these 20 concepts (save this now):


1 Endpoint
2 HTTP Methods
3 Request-Response
4 Status Codes
5 Authentication
6 Authorization
7 Access Tokens
8 OAuth 2.0
9 Rate Limiting
10 Throttling
11 Pagination
12 Caching
13 Idempotency
14 Webhooks
15 API Versioning
16 OpenAPI
17 REST vs GraphQL
18 API Gateway
19 Microservices
20 Error Handling

An API is a set of rules that allows different services to talk to each other.
What else would you add?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others learn API design.
👤 Follow Neo Kim + turn on notifications.

If I had to load balance traffic,
here are 6 algorithms I'd consider:


1 Round robin:
↳ The load balancer forwards the request to the servers in sequence.

2 Weighted round robin:
↳ The load balancer forwards the request based on server capacity.

3 Least connections:
↳ The load balancer forwards the request to the server with the fewest connections.

4 IP hash:
↳ The load balancer forwards the request based on the client's IP address.

5 Least response time:
↳ The load balancer forwards the request to the fastest responding server.

6 Adaptive:
↳ The load balancer forwards the request based on server health

What else would you add?

——

👋 PS - AI code review with comments you'll actually implement.

Unblocked is the AI code review that surfaces real issues and meaningful feedback instead of flooding your PRs with stylistic nitpicks and low-value comments.

Try Now:
→ https://lnkd.in/eKmhsfQy

(Thanks to Unblocked for partnering on this post.)

———

💾 Save this for later & repost to help others understand load balancing.
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6 Load Balancing Algorithms for Software Engineers

If I wanted to pass job interviews in 2026,
I'd save & read this:


1 Sorting Algorithm 101
↳ https://lnkd.in/dUfR-sWi

2 Behavioral Interview Playbook for Software Engineers
↳ https://lnkd.in/dW7jrnjF

3 System Design Concepts 101
↳ https://lnkd.in/eK87NkE5

4 System Design Interview: Design YouTube
↳ https://lnkd.in/e7q9F4Sg

5 System Design Interview: Design Airbnb
↳ https://lnkd.in/dGVfstQM

6 System Design Interview: Design WhatsApp
↳ https://lnkd.in/eU2fswMi

7 System Design Interview Question: Design Spotify
↳ https://lnkd.in/eGbWVeNW

8 Distributed Systems – A Deep Dive
↳ https://lnkd.in/eZCC7KPx

9 How Stock Exchange Works
↳ https://lnkd.in/eNf2QxVZ

10 How Kafka Works
↳ https://lnkd.in/eTtVAjTg

11 How Google Docs Works
↳ https://lnkd.in/ehPNA7Az

12 How to Scale an App to 10 Million Users
↳ https://lnkd.in/eU736g9Q

What else should make this list?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help other software engineers ace job interviews.
👤 Follow Neo Kim + turn on notifications.

Replication vs Partitioning vs Sharding
(explained in 2 mins or less):


Replication
↳ Copy data
↳ Boost availability and read throughput

——

Partitioning
↳ Split data (single node)
↳ Improve performance within one node

——

Sharding
↳ Split + distribute data
↳ Scale out when a single node is not enough

What else would you add?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others learn system design.
👤 Follow Neo Kim + turn on notifications.

If I had to scale a system,
here are 40 techniques I'd consider:


1 Horizontal Scaling
2 Vertical Scaling
3 Caching
4 Load Balance
5 Sharding
6 Replication
7 Partition
8 Autoscale
9 Microservices
10 Event Driven
11 Queueing
12 Stateless
13 Indexing
14 Timeouts
15 Retries
16 Rate Limit
17 Circuit Breaker
18 Backpressure
19 GeoDNS
20 Multi Region
21 Container
22 Orchestration
23 Service Mesh
24 Diagonal Scale
25 CDN
26 Monitoring
27 Tracing
28 Failover
29 High Availability
30 Graceful Degradation
31 Consistent Hashing
32 CAP Tradeoff
33 Modularity
34 Bulkhead
35 Prefetching
36 Lazy Load
37 Capacity Planning
38 Hot Standby
39 Read Replica
40 Write Batching

There are different ways to scale.
The best solution + numbers depend on your needs.
Remember, everything is a tradeoff.

What else would you add?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others learn system design.
👤 Follow Neo Kim + turn on notifications.

How Big O works explained in 2 mins or less:


✓ Big O tells how much slower the code gets as the input increases.

✓ There are best, average, and worst cases for a specific algorithm.

✓ Plus, there are Big Os for time, memory & storage efficiency.

✓ Big O helps to understand which data structures or algorithms have better performance.

✓ Big O shows the growth rate and not the actual speed, so it's crucial to test the input data.

What else would you add?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others write good code.
👤 Follow Neo Kim + turn on notifications.

If I wanted to set up a cache,
I'd consider these 5 strategies:


1 Cache aside
↳ Reads data from the database on a cache miss and then populates it
↳ Risk: inconsistency + extra latency
↳ Best for: read-heavy workloads

——

2 Write through
↳ App writes the data to the cache and then synchronously to the database
↳ Risk: high write latency, cache bloat
↳ Best for: low-write, freshness-critical apps

——

3 Read through
↳ Cache fetches data directly from the DB on a miss--the app never touches the DB
↳ Risk: inconsistency
↳ Best for: read-heavy workloads

——

4 Write back
↳ App writes the data to the cache and then asynchronously to the database
↳ Risk: data loss if the cache crashes
↳ Best for: high-throughput, write-heavy apps

——

5 Write around
↳ Data is written to the database, and the cache gets populated on demand
↳ Risk: cold reads = latency spike
↳ Best for: large, rarely updated data

What else should make this list?

——

👋 PS - Want public web data without scraper headaches?

SerpApi turns search results into predictable JSON with built-in scale, location options, and protection from blocks.

That’s why software engineers use it to ship:
• AI applications
• Product research
• Price tracking
• SEO insights

All without maintaining scrapers or infrastructure.

Try SerpApi for FREE:
→ https://lnkd.in/erZCidXu

(I’d like to thank SerpApi for partnering on this post.)

———

💾 Save this for later & repost to help other software engineers learn cache strategies.
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12 newsletters that will fast-track
your software engineering career (save this):


1 System design
↳ https://lnkd.in/ehTrcyak

2 Engineering leadership
↳ https://lnkd.in/ehHM46E2

3 AI engineering fundamentals
↳ https://lnkd.in/evsSDE-B

4 Actionable tips to write good software
↳ https://lnkd.in/ewTPYGhT

5 Software design & architecture
↳ https://lnkd.in/eAdZAcZi

6 Test-driven development
↳ https://lnkd.in/ezdTGYKB

7 Weekly tech reads
↳ https://lnkd.in/dYsYPA2F

8 Software design and frontend development
↳ https://thetshaped.dev/

9 Engineering career growth strategies
↳ https://lnkd.in/eMVBjiqP

10 People skills and leadership
↳ https://lnkd.in/eEfdPbiM

11 Data engineering
↳ https://lnkd.in/eG5hBej6

12 DevOps
↳ https://www.tech5ense.com/

Each newsletter on this list taught me something new.
What else should make this list?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others become 10x engineers.
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15 posts that'll teach you 15 system design concepts:


1 A Crash Course on High Availability
↳ https://lnkd.in/dxpqwabF

2 System Design Fundamentals 101
↳ https://lnkd.in/dDKk3-Xw

3 API Design Best Practices
↳ https://lnkd.in/eUEFzEC8

4 How Databases Keep Passwords Securely
↳ https://lnkd.in/edd8-N5k

5 Distributed Systems 101
↳ https://lnkd.in/eZCC7KPx

6 Actor Model
↳ https://lnkd.in/eqcb7MpP

7 How RPC Works
↳ https://lnkd.in/eScZS9F5

8 How Idempotent API Works
↳ https://lnkd.in/erMkqwq4

9 CS Stack 101
↳ https://lnkd.in/drrtaWGA

10 Bloom Filters
↳ https://lnkd.in/e2duES7s

11 Cell Based Architecture
↳ https://lnkd.in/eTP27Aic

12 Saga Design Pattern
↳ https://lnkd.in/eFXC4-aJ

13 Consistent Hashing
↳ https://lnkd.in/eUP9DbCg

14 How Service Discovery Works
↳ https://lnkd.in/eCYYwQfU

15 API Versioning - A Deep Dive
↳ https://lnkd.in/eg_fmBhu

What else should make this list?

——

👋 PS - Want my System Design Playbook for FREE?

Click the link below to join my newsletter right now:
→ https://lnkd.in/ehTrcyak

(200K+ software engineers have already signed up.)

———

💾 Save this for later & repost to help others learn system design.
👤 Follow Neo Kim + turn on notifications.

Want to give AI agents the knowledge of your most experienced engineers?

Unblocked builds context from your team’s code, PR history, conversations, documentation, planning tools, and runtime signals to surface what matters for the task at hand – while resolving conflicts and respecting permissions.

Ship faster with AI outputs that reflect how your system actually works.

See how it works:

https://lnkd.in/ehtgnwAx

If you want to become a world-class prompt engineer
(in 1 week), learn these 14 techniques:


What else should make this list?

——

👋 PS - Unblocked: The context layer your AI tools are missing

Want to give AI agents the knowledge of your most experienced engineers?

Unblocked builds context from your team’s code, PR history, conversations, documentation, planning tools, and runtime signals to surface what matters for the task at hand – while resolving conflicts and respecting permissions.

Ship faster with AI outputs that reflect how your system actually works.

See how it works:

→ https://lnkd.in/ehtgnwAx

(Thanks, Unblocked, for partnering on this post.)

———

💾 Save this for later & repost to help others master prompting.
👤 Follow Neo Kim + turn on notifications.

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The Battle

Gábor Till

Neo K.

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taplio

The Battle

Gábor Till

Neo K.

Followers

Posts

Engagements

Likes

Performance Score.css-goub6s{font-size:var(--chakra-fontSizes-md);font-weight:500;color:var(--chakra-colors-gray-600);display:block;margin-top:var(--chakra-space-1);}Neo K.'s LinkedIn Performance

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