TECHNOLOGY & ENGINEERING
1 Introduction
2 Architecture
3 The Landscape
4 Role Deep Dives
5 Industry Lens
6 Compensation
7 Practitioner Lab
Functions Explored
0 of 25 explored
Layer 3 · Function Expert Guide
Technology & Engineering
25 functions across 5 groups — from Frontend Engineering to CTO. The complete recruiter's atlas for tech mandates at every level and every domain.
25
Engineering Functions
5
Function Groups
95
Sub-Functions
570
Specific Areas
What This Guide Covers
Technology & Engineering is the defining talent battleground of the decade. Every company is now a technology company — but most hiring managers and recruiters don't understand the difference between a Staff Engineer and a Principal Engineer, a DevOps engineer and an SRE, an ML Engineer and a Data Scientist. This guide decodes every tech engineering sub-function, maps career ladders (SDE1 to CTO), explains the India-specific context (GCCs, product companies, startups), and gives you the exact questions that separate genuine depth from buzzword familiarity.

🌠 Architecture Explorer

All 25 engineering functions across 5 groups. Sub-functions, areas, roles, industries, and recruiter lens for each.

🌏 The Landscape

IC vs management track. The engineering career ladder. India's tech ecosystem — GCCs, product companies, startups.

🔍 Role Deep Dives

What great engineering leadership looks like. Hardest roles to fill. Screening questions by track.

🏭 Industry Lens

How tech orgs differ across consumer internet, GCC/MNC, fintech, B2B SaaS, and deep-tech/hardware.

📈 Compensation

India engineering pay benchmarks by level. SDE1 to CTO. GCC vs startup vs product company premiums.

📋 Practitioner Lab

Six tech recruiting scenarios — Staff vs Senior confusion, AI hype filter, CTO for early-stage. Plus jargon decoded.

The 5 Function Groups
Software Engineering
5 functions — Frontend, Backend, Full-Stack, Mobile, QA
Platform & Infrastructure
5 functions — DevOps, Cloud, SRE, Security, Data Infrastructure
Data, AI & Machine Learning
5 functions — Data Science, ML Engineering, GenAI, MLOps, Analytics Engineering
Specialised Engineering
5 functions — Embedded, VLSI, Cybersecurity, Blockchain, FinTech Engineering
Engineering Leadership
5 functions — EM, Staff/Principal, Director, VP Engineering, CTO

The Complete Technology & Engineering Universe

25 functions across 5 groups. Click any card to explore sub-functions, areas, roles & recruiter lens.

1
Software Engineering
Building the product layer
5 functions
1🖥️
Frontend Engineering
React, Angular, Vue — the layer users see and touch. Performance, accessibility, and UX discipline.
4 sub-fns
2⚙️
Backend Engineering
APIs, databases, business logic. The engine that powers everything users don't see.
4 sub-fns
3🔧
Full-Stack Engineering
Can build across the stack. Most valuable in early-stage companies where speed matters more than specialisation.
3 sub-fns
4📱
Mobile Engineering (iOS/Android)
Native apps. Performance, permissions, OS constraints, and store dynamics define the craft.
4 sub-fns
5
QA & Test Engineering
Quality at speed. Shift-left testing, automation, and the culture of quality in high-velocity teams.
4 sub-fns
2
Platform & Infrastructure
The foundation everything runs on
5 functions
6🚀
DevOps & Platform Engineering
CI/CD, infrastructure as code, developer experience. The team that makes engineers more productive.
4 sub-fns
7☁️
Cloud Architecture & Engineering
AWS, GCP, Azure — designing resilient, scalable, cost-efficient cloud infrastructure.
4 sub-fns
8🛡️
Site Reliability Engineering (SRE)
Keeps production running. SLAs, incident management, and the art of making systems reliable at scale.
4 sub-fns
9🔐
Security Engineering (AppSec/InfoSec)
Builds security into the product and infrastructure. Not the team that says no — the team that makes 'yes' safe.
4 sub-fns
10🗄️
Data Infrastructure & Engineering
Pipelines, warehouses, data lakes. The plumbing that makes data analytics possible.
4 sub-fns
3
Data, AI & Machine Learning
Intelligence at the core of modern products
5 functions
11📊
Data Science
Statistical modelling, experimentation, and insight generation. The bridge between data and decisions.
4 sub-fns
12🤖
Machine Learning Engineering
Builds and deploys models in production. The gap between a notebook experiment and a live system.
4 sub-fns
13🧠
AI / GenAI Engineering
LLMs, RAG, agents — the fastest-evolving engineering discipline. Building with probabilistic systems.
4 sub-fns
14
MLOps & AI Platform
The operations layer for AI/ML — model versioning, monitoring, retraining pipelines, and serving infrastructure.
4 sub-fns
15🔗
Analytics Engineering
dbt, data models, semantic layers — the discipline that makes data consistent and trustworthy across the org.
3 sub-fns
4
Specialised Engineering
Domain-specific engineering depth
5 functions
16🔌
Embedded & Firmware Engineering
Software that runs on hardware. IoT, automotive ECUs, consumer electronics — a different discipline entirely.
4 sub-fns
17🖱️
Hardware / VLSI Engineering
Chip design, PCB, ASIC — building the physical layer. India has a growing semiconductor engineering ecosystem.
4 sub-fns
18🛡️
Cybersecurity & InfoSec
Protecting systems, data, and users. The demand for security talent outpaces supply everywhere.
4 sub-fns
19🔗
Blockchain & Web3 Engineering
Smart contracts, DeFi, tokenisation. Niche but growing — especially in financial infrastructure and supply chain.
3 sub-fns
20💳
FinTech & Payments Engineering
Payment rails, UPI integration, banking APIs — specialised engineering where regulatory compliance is a hard constraint.
4 sub-fns
5
Engineering Leadership
Growing engineers and engineering organisations
5 functions
21👥
Engineering Manager
The first management role in engineering. Half people manager, half technical lead. The hardest transition in tech careers.
4 sub-fns
22
Staff / Principal Engineer
The senior individual contributor who shapes architecture and multiplies teams without managing them.
4 sub-fns
23🏗️
Director of Engineering
Manages engineering managers. Owns delivery for a product area. The bridge between technology and business.
4 sub-fns
24🏆
VP Engineering / Head of Engineering
Defines engineering culture, org structure, and technical direction. Partners with the CPO and CEO on product strategy.
4 sub-fns
25🚀
CTO (Chief Technology Officer)
The technology visionary and organisation builder. Externally: technology credibility. Internally: engineering culture.
4 sub-fns
The Landscape
Engineering Career Architecture in India
IC vs management track. The engineering career ladder. Specialist vs generalist. India's tech ecosystem.
The Two Engineering Tracks — IC vs Management
💻 Individual Contributor (IC) Track
SDE 1 (0–2 yrs)Executes well-defined tasks. Learns the codebase and team norms. Output: features delivered.
SDE 2 (2–5 yrs)Owns features end-to-end. Mentors juniors informally. Output: complete feature sets.
Senior Engineer (5–8 yrs)Owns complex systems. Influences technical decisions. Output: system design and mentorship.
Staff Engineer (8–12 yrs)Cross-team technical impact. Shapes architecture across multiple teams. Output: engineering direction.
Principal / Distinguished (12+ yrs)Company-wide technical strategy. Deep domain expert or architecture visionary. Output: technical org leverage.
👥 Engineering Management Track
Engineering Manager (5–8 yrs total)Leads a team of 5–10 engineers. People management + delivery accountability. First management role.
Senior EM / Group EM (8–12 yrs)Leads multiple teams or a larger team. Manages across projects. Technical judgment still required.
Director of Engineering (10–15 yrs)Manages EMs. Owns a product area or domain. Bridge between technology and business.
VP Engineering (15+ yrs)Defines engineering culture and org structure. Partners with CPO and CEO. Organisation-builder.
CTO (15+ yrs)Technology vision and engineering organisation. External technology credibility. Business strategy partner.
Specialised vs Generalist — What India's Market Rewards

🎯 When Specialisation Wins

AI/ML Engineering: Deep specialisation in LLMs, MLOps, or recommendation systems commands 30–60% premiums over equivalent-level generalists.

Security Engineering: AppSec + cloud security at senior levels is extremely scarce — specialist premium is consistent.

Embedded / VLSI: Non-transferable domain expertise. Specialists are always in short supply.

Data Engineering (Spark/Kafka/dbt): Deep stack knowledge is valued; generalist SQL analysts don't compete.

🌐 When Generalism Wins

Early-stage startups (Seed–Series A): Full-stack engineers who can ship independently and wear multiple hats are more valuable than specialists.

Engineering leadership roles: EMs and Directors need breadth — depth in one stack is a handicap at senior management levels.

Platform / DevOps roles: Cross-domain knowledge (cloud + containers + CI/CD + networking) is the product.

Technical CTO (early-stage): Needs to make decisions across the entire stack.

India's Tech Engineering Ecosystem — The Three Worlds

🏭 GCC / MNC (Global Capability Centres)

Scale: India has 1,700+ GCCs employing 1.5M+ engineers. Growing 15–20% annually.

Engineering character: Feature development for global products. Process-heavy. FAANG-adjacent compensation. Strong in cloud, data, and QA.

Career pattern: Predictable ladder. Technology risk is low. Best for: IC depth in a specific domain (Java, AWS, QA automation, data engineering).

Limitation: Product ownership is rare. Engineering leadership ceiling is real — strategic decisions stay at HQ.

🚀 Indian Product Companies

Examples: Flipkart, Swiggy, Zepto, Razorpay, CRED, PhonePe, Zomato, Urban Company.

Engineering character: Full product ownership. High velocity. Engineering leaders make real product decisions. Best engineering culture in India.

Career pattern: Fast — SDE2 to Staff in 3–4 years at the best companies. High ownership, high ambiguity.

Compensation: Stock-heavy. Cash vs GCC may be comparable; total comp (ESOP) often exceeds at senior levels.

💡 Startups (Seed to Series C)

Engineering character: High ambiguity, high ownership. Build everything from scratch. Technical debt is real. Product-engineering boundary is blurred.

Career pattern: Non-linear. An SDE2 at Series A can become a Director at Series C. Risk is high; reward is high.

What to look for: Engineers who thrive in ambiguity, have built things end-to-end, and can make technology decisions without an architecture review board.

Limitation: Engineering process maturity is low early-stage — candidates from large companies struggle.

Role Deep Dives
Inside the Engineering Org — What Great Looks Like
From SDE1 to CTO. Hardest roles to fill. Killer screening questions by engineering track.
What Great Engineering Leadership Looks Like at Each Level

Senior Engineer (5–8 yrs)

Owns: Complete features and system components. Mentors junior engineers. Makes technology choices within a team context.

Green flag: "I designed this system — here is the trade-off I made between consistency and availability and why."

Red flag: Senior engineers who code well but can't communicate design decisions to others — technically strong but not yet leadership-ready.

Staff / Principal Engineer

Owns: Architecture across multiple teams. Technical direction for a product area or platform. Multiplies other engineers.

Green flag: "I wrote this RFC that changed how three teams thought about data consistency — here's the problem, my proposal, and how I got alignment."

Red flag: Engineers who claim Staff level but can't show cross-team impact — deep technical work that only benefits their own team is Senior, not Staff.

Engineering Manager

Owns: A team's delivery, health, and growth. Partners with PM. Represents engineering in cross-functional discussions.

Green flag: "The hardest situation I've managed was an underperforming engineer — here's how I handled it, what changed, and what I learned."

Red flag: EMs who still position themselves as the best coder on the team — they haven't made the management transition.

VP Engineering / CTO

Owns: The engineering organisation, culture, and technology direction. A business partner who happens to run engineering.

Green flag: "Here's the biggest engineering culture problem I diagnosed — what was broken, what I changed, and how I measured whether it worked."

Red flag: VPs/CTOs who can only talk about technology decisions — at this level, the org design IS the primary product.

The Hardest Engineering Roles to Fill

Staff Engineer / Principal Engineer

The IC leadership track is poorly understood even within engineering. Most companies promote people into Staff without a clear charter. The supply of genuine Staff Engineers (cross-team impact, RFC culture, architectural vision) is extremely thin.

AI / ML Engineering (Senior+)

Everyone claims ML experience post-ChatGPT. Genuine production ML Engineers — who've deployed models, built feature stores, monitored drift, and managed retraining pipelines — are scarce and expensive. The gap between a notebook ML analyst and a production ML engineer is enormous.

CTO (Early-Stage Startup)

Early-stage CTO must be chief architect, first engineer, technical hiring manager, and technology communicator to investors simultaneously. This combination is rare. Most engineering leaders are strong in one or two of these — rarely all four.

Security Engineering (AppSec)

Application security engineers who write production-quality code AND understand offensive security AND can build security culture are extremely rare. Most security roles are filled by compliance-heavy GRC profiles that don't meet engineering security requirements.

DevOps / Platform Engineering (Staff+)

Senior platform engineers who understand developer experience, cloud cost, reliability, AND security simultaneously are always in demand and rarely available. Most DevOps profiles are tool-heavy without systems thinking.

Embedded / Firmware (Automotive ASIL)

ISO 26262 functional safety experience combined with AUTOSAR architecture expertise is extremely scarce in India. Automotive ECU engineers are concentrated in Pune and are heavily poached by GCCs of German OEMs.

Killer Screening Questions by Engineering Track

For Backend / System Design

"Design a rate limiter that needs to handle 100K requests/sec with sub-millisecond latency — walk me through your approach, data structures, and trade-offs." Tests: distributed systems thinking, not just API knowledge.

For ML Engineers

"Walk me through a model you've deployed to production — serving infrastructure, latency requirement, how you monitored it post-deployment, and how you handled data drift." Tests: production ML depth, not just training.

For Staff / Principal Engineers

"Tell me about a technical RFC you've written that changed how multiple teams work — what was the problem, your proposal, and how did you build consensus across disagreeing engineers?" Tests: cross-team influence and communication.

For Engineering Managers

"Walk me through the most difficult underperformance situation you've managed — what was the issue, how long did you give it, what interventions did you make, and what was the outcome?" Tests: people management reality, not theory.

For GenAI / LLM Engineers

"Walk me through a production RAG system you've built — what was the chunking strategy, embedding model, retrieval approach, evaluation methodology, and how did you handle hallucinations?" Tests: production GenAI depth vs tutorial exposure.

For VP Engineering / CTO

"What is the biggest technology or engineering org mistake you've made as a leader — what happened, why did you make that call, and what would you do differently?" Tests: self-awareness, leadership maturity, and learning velocity.

Industry Lens
Engineering Across Industries
How tech orgs differ across consumer internet, GCC/MNC, fintech, B2B SaaS, and deep-tech/hardware — and what travels.
Engineering Skills — What Travels and What Doesn't
🌐 Engineering Skills That Travel
System DesignDistributed systems thinking applies across consumer internet, fintech, and enterprise SaaS
Backend EngineeringAPI design, databases, and microservices travel well across industries
Cloud EngineeringAWS/GCP/Azure architecture transfers with minor domain adjustment
Engineering LeadershipPeople management and org design skills transfer across tech sectors
DevOps / PlatformCI/CD and infrastructure-as-code principles are largely universal
🔒 Engineering Skills That Don't Travel
Embedded / AutomotiveAUTOSAR, CAN bus, ISO 26262 — sector-locked, not portable to web software
VLSI / Chip DesignRTL design and physical design are non-transferable to software engineering
Payments / Fintech RailsUPI, card scheme certification, core banking APIs — specialised, not portable to generic backend
Gaming Engine EngineeringUnreal / Unity + real-time rendering is a world apart from web backend
HPC / Scientific ComputingCUDA, parallel computing, numerical methods — specialised scientific engineering
Industry-by-Industry Engineering Breakdown

📷 Consumer Internet (Flipkart, Swiggy, Zomato, CRED)

Engineering priority: Scale, reliability, latency, data engineering, ML/personalisation, mobile engineering

Key signals: Experience with high-QPS systems, on-call culture, DORA metrics awareness, distributed systems fluency

Red flag: Engineers who can't articulate how they've designed for failure — in consumer internet, systems fail at scale constantly

🏭 GCC / MNC (Microsoft, Google, Amazon, Goldman, JP Morgan Tech)

Engineering priority: Feature development for global products, quality engineering, cloud, data platform, security

Key signals: Depth in one domain, process discipline, cross-timezone collaboration, documentation culture

Red flag: GCC engineers applying to early-stage startups — the ambiguity tolerance and ownership expectation gap is real and large

💳 Fintech (Razorpay, PhonePe, Paytm, Groww, Zerodha)

Engineering priority: Payment rails, fraud engineering, compliance systems, reliability (99.99% uptime is table stakes), real-time data

Key signals: UPI / payment system experience, strong on reliability and SRE culture, understanding of regulatory constraints

Red flag: Engineers who treat financial engineering like regular consumer apps — the stakes (real money, regulatory risk) require a different mindset

💻 B2B SaaS (Freshworks, Chargebee, Zoho, Postman)

Engineering priority: Multi-tenancy, API-first architecture, integrations ecosystem, security (SOC 2), performance at enterprise scale

Key signals: Multi-tenant architecture experience, API design quality, understanding of SLAs and enterprise customers

Red flag: Consumer internet engineers for B2B SaaS without understanding the different customer expectation — enterprise wants stability, not velocity

🚀 Deep-Tech / Hardware (automotive, semiconductor, aerospace)

Engineering priority: Embedded systems, VLSI, real-time OS, functional safety, hardware-software co-design

Key signals: Domain certification (ISO 26262 for automotive, DO-178C for aerospace), hardware debug tools experience, C/C++ embedded depth

Red flag: Embedded engineers without hardware debugging experience — the ability to read a schematic and use an oscilloscope is table stakes

🏠 HealthTech (Practo, Niramai, mFine, PharmEasy)

Engineering priority: Data privacy (DPDP Act, HIPAA for global), reliability, EHR integration, ML for diagnostics, regulatory compliance

Key signals: Understanding of health data sensitivity, FHIR/HL7 standards (for clinical systems), security-first engineering mindset

Red flag: HealthTech companies need engineers who understand why their data handling is different from a food delivery app — privacy is non-negotiable

Compensation
Engineering Pay Architecture — India 2024-25
Benchmarks by level. GCC vs startup vs product company. Stock comp and AI/ML premiums.
What Drives Engineering Pay in India
📈 Key Pay Drivers
FAANG / top-tier pedigreeGoogle, Meta, Amazon, Microsoft India add 30–60% premium at mid-senior levels
AI/ML specialisationProduction ML Engineers earn 40–80% more than equivalent-level generalists at Senior+
Startup ESOPStock at pre-IPO product companies (Razorpay, Zepto) can multiply total comp 3–10x
IIT / NIT pedigree (early career)20–40% premium at SDE1/SDE2 — fades significantly at Staff and above
Domain specialisationSecurity, embedded, VLSI command consistent 25–50% specialty premiums
⚠️ Common Client Mistakes
GCC comp vs startupStartup cash rarely matches GCC — if candidate won't trade cash for equity, they're not a startup hire
Staff Engineer comp shockStaff Engineers at top product companies earn ₹80–150L+ — clients budget for Senior
AI/ML inflation"ML Engineer" ranges from ₹18L to ₹150L+ — role calibration before budget is essential
CTO comp mismatchEarly-stage CTOs (Seed/Series A) often earn less than their previous VP role — ESOP is the thesis
Compensation by Level — India Engineering Market 2024-25
Total CTC in ₹ Lakhs per annum. Ranges reflect GCC on lower end, top product companies on upper end. AI/ML roles command premium at each level.

SDE 1 / Junior Engineer (0–2 yrs)

GCC / Service company: ₹6–15L

Product startup: ₹10–20L

Top product company (Flipkart, PhonePe): ₹18–35L

FAANG India: ₹30–60L

IIT premium at SDE1: ₹5–15L above median

SDE 2 / Mid-Level Engineer (2–5 yrs)

GCC / Service company: ₹15–30L

Product startup: ₹22–45L

Top product company: ₹35–70L

FAANG India: ₹50–100L

AI/ML SDE2 premium: 30–50% above median

Senior Engineer (5–8 yrs)

GCC / Service company: ₹25–50L

Product startup: ₹40–80L

Top product company: ₹60–130L

FAANG India: ₹80–200L

Security / DevOps specialisation: ₹10–30L premium

Staff / Principal Engineer (8–14 yrs)

GCC / Service company: ₹40–80L

Product startup: ₹70–150L + ESOP

Top product company: ₹100–250L

FAANG India: ₹150–400L+

ML Staff Engineer: can reach ₹200–500L at FAANG

Engineering Manager / Director (8–15 yrs)

EM (GCC): ₹30–70L

EM (Product startup): ₹50–120L + ESOP

Director (GCC): ₹60–130L

Director (Product company): ₹100–250L

Management track generally earns less than IC Staff at top companies

VP Engineering / CTO (15+ yrs)

Startup (Seed/A): ₹40–80L + 1–4% ESOP

Mid-size company (Series B/C): ₹80–200L + ESOP

Large product company: ₹200L–1Cr+

MNC India CTO: ₹200L–3Cr

Early-stage CTO: cash below market; ESOP is the bet

Practitioner Lab
Engineering Recruiting Scenarios & Jargon Decoder
Six real tech recruiting scenarios with recommended moves — plus the engineering jargon every SNH recruiter must know.
Practitioner Lab — Tech Recruiting Scenarios

Scenario 1: Senior vs Staff Engineer Confusion

Client wants a "Staff Engineer" for their platform team. Budget: ₹80L. They describe the role: "Own the backend of our payments service, write good code, review others." You find a genuinely strong Senior Engineer at ₹65L and a Staff Engineer at a FAANG for ₹200L.

The move: Clarify what Staff actually means. A Staff Engineer owns cross-team technical direction, writes RFCs, and multiplies engineers beyond their immediate team. What the client described is a Senior Engineer role. Don't let the client overpay for the wrong level, or underpay and lose the Staff candidate. Re-brief the client on scope before proceeding.

Scenario 2: The AI/ML Hype Filter

Client needs an "ML Engineer to build AI features." 60 CVs received, all claim "ML experience." Budget: ₹40–60L. Most profiles: data analysts who've used scikit-learn in notebooks. A few: actual production ML engineers at e-commerce or fintech companies.

The move: Apply a three-question filter before sending any profile: 1) "Have you deployed a model to production?" 2) "What was the serving infrastructure and latency SLA?" 3) "How did you monitor for data drift?" Analysts who've only done offline experiments will fail all three. Share only profiles that pass — and explain the filter to your client so they trust your shortlist.

Scenario 3: GCC Engineer for a Startup

Series B startup (₹120Cr ARR, 45 engineers) needs a Director of Engineering. Strong candidate: 14 years experience, last 6 years at a top GCC managing a team of 25 engineers. Excellent process discipline, people skills, strong tech background. Never worked at a company smaller than 5,000 people.

The move: Probe the ambiguity tolerance explicitly: "In your current role, when you need a new tool or process, what does the approval and rollout look like?" Then ask: "In a 45-person startup, you'd make that decision yourself by Tuesday. How does that feel?" If they lean in — worth presenting. If they look uncomfortable — flag it to the client as a genuine risk.

Scenario 4: The Early-Stage CTO Mandate

Seed-stage startup (20 people, 5 engineers, pre-PMF) wants to hire a CTO. Budget: ₹60–80L cash + 2% ESOP. Looking for a "technical visionary."

The move: Be direct with the founder: at Seed, the CTO IS the engineering team. They need someone who can write code today AND make architecture decisions for year 2. Ask: "How important is it that your CTO ships code in the first 6 months?" Budget reality: ₹60–80L cash will not attract a late-stage VP Engineering. Focus on ambitious Senior/Staff Engineers ready for their first leadership role.

Scenario 5: The Security Engineering Mismatch

Fintech client (₹500Cr ARR, PCI-DSS compliance required) needs a "Head of Security." Profiles: (A) CISO from a large bank — deep GRC/compliance, no engineering background. (B) AppSec Engineer — 8 years, writes code, OSCP certified, has built bug bounty programmes. (C) Security architect — 12 years, designed zero-trust architectures, comfortable with both code and governance.

The move: Profile A is a Compliance Head, not an engineering security leader. Present Profiles B and C with the framing: "B is strong on engineering depth and offensive security. C has broader architecture and governance." Let the client choose based on what they're missing most.

Scenario 6: The GenAI Title Inflation

Consumer internet client wants a "Senior GenAI Engineer." Budget: ₹60–90L. In screening: 2 candidates have integrated ChatGPT API via LangChain tutorial; 1 has built a production RAG system handling 500K daily queries with custom evaluation; 1 has fine-tuned models and built agent workflows.

The move: Title inflation in GenAI is extreme. Only share candidates 3 and 4. For candidate 3, ask: "Walk me through your evaluation framework — how do you measure RAG quality beyond basic accuracy?" For candidate 4, ask: "What did fine-tuning add that prompting alone couldn't give you?" If they can't answer in technical detail, they're a power user, not an engineer.

Engineering Jargon Decoded

SLA / SLO / SLI

SLI (Service Level Indicator) = measurement (e.g., latency). SLO (Service Level Objective) = internal target (e.g., p99 latency < 200ms). SLA (Service Level Agreement) = external commitment to customers. SREs manage error budgets based on SLOs. Ask any platform or backend candidate: "What was your team's SLO for your primary service?"

CI/CD

Continuous Integration (CI) = automatically testing code changes. Continuous Delivery/Deployment (CD) = automatically releasing tested changes to production. A team without CI/CD ships slowly and with high risk. Ask any DevOps or senior backend candidate: "Describe your current deployment pipeline — how long from commit to production?" Elite teams: under 30 minutes.

Infrastructure as Code (IaC)

Managing cloud infrastructure through code (Terraform, Pulumi) rather than clicking in a console. Enables reproducibility, version control, and disaster recovery. A DevOps engineer without IaC experience is a cloud admin, not a platform engineer. Ask: "What's your Terraform module structure for a multi-environment AWS setup?"

DORA Metrics

Four metrics that measure software delivery performance: 1) Deployment Frequency, 2) Lead Time for Changes, 3) Change Failure Rate, 4) Time to Restore. Elite teams: deploy multiple times/day, lead time < 1 day. Good DevOps and EM candidates should know and quote these without prompting.

LLM vs Traditional ML

Traditional ML: train a model on specific data for a specific task (churn prediction, fraud detection). LLMs: large pre-trained models that can be prompted or fine-tuned for many tasks. They're complementary — not interchangeable. An ML Engineer trained on traditional ML is NOT automatically qualified for GenAI/LLM engineering. Different stack, different failure modes, different debugging approaches.

SRE vs DevOps

DevOps = culture + practices for faster, more reliable software delivery. SRE = Google's engineering discipline for reliability — SLOs, error budgets, toil elimination, production systems management. SREs typically come from software engineering backgrounds; DevOps practitioners from operations. Both are scarce. Neither is a synonym for "sysadmin who knows Docker."