Solutions Architect Jobs in Hyderabad 2026: Apply Kaise Kare

Aap Hyderabad me Solutions Architect job dhoondh rahe ho, LinkedIn pe 100 openings dikh rahi hain, but apply karte hi silence. Resume submit, “Application received” mail aaya, phir kuch nahi. Aur jab JD padhte ho to AWS, Azure, GCP, microservices, Kubernetes, pre-sales, stakeholder management sab ek saath maang lete hain.

Tension mat lo. Solutions Architect role confusing lagta hai, but iska game samajh aa jaye to 2026 me Hyderabad me kaafi strong opportunities mil sakti hain. Especially agar tum Java, .NET, DevOps, Cloud, Data Engineering, Cybersecurity, ya backend background se aa rahe ho.

Hyderabad ab sirf “IT services city” nahi raha. Yahan Microsoft, Amazon, Google, Oracle, Salesforce, ServiceNow, Infosys, TCS, Wipro, Accenture, Deloitte, Cognizant, Tech Mahindra, Capgemini, Wells Fargo, JPMorgan, DBS, Qualcomm jaise companies ke strong tech teams hain. Plus product aur startup side pe Darwinbox, HighRadius, Zenoti, ValueLabs, Cyient, CtrlS, Tanla, Paytm, PhonePe, Swiggy, Zomato type teams bhi cloud architecture aur platform roles ke liye hire karti rehti hain.

Chalo senior bhai style me clear karte hain: Solutions Architect job hota kya hai, Hyderabad me salary kitni mil sakti hai, 2026 me apply kaise karna hai, resume me kya likhna hai, aur interview me kaise crack karna hai.

Solutions Architect Role Actually Hota Kya Hai?#

Simple language me, Solutions Architect wo banda ya bandi hai jo business problem ko tech solution me convert karta hai.

Client ya internal team bolegi: “Hume 10 million users ke liye scalable payment platform banana hai.” Architect decide karega:

1. Kaunsa cloud use hoga, AWS, Azure, ya GCP.
2. System architecture kaisa hoga, monolith ya microservices.
3. Database kya hoga, PostgreSQL, DynamoDB, MongoDB, Cassandra.
4. Security kaise handle hogi.
5. Cost kaise control hogi.
6. Traffic spike aaya to system down na ho, uska plan.
7. Developers ko implementation direction.

Matlab coding sirf ek part hai. Real kaam hota hai decision making, trade-offs, communication, documentation, aur delivery ka practical sense.

Solutions Architect vs Software Architect vs Cloud Architect

Ye teen roles JD me mix ho jaate hain, but thoda difference samjho.

1. Solutions Architect: Business requirement se complete solution design karta hai. Client-facing ya stakeholder-facing role zyada hota hai.
2. Software Architect: Application ke internal design, code structure, design patterns, APIs, modules pe zyada focus.
3. Cloud Architect: Cloud infra, networking, security, migration, cost, scalability pe focus.

Hyderabad companies me kaafi baar title “Solutions Architect” hota hai but kaam Cloud Architect jaisa hota hai. Kabhi “Technical Architect” likha hota hai but role Solutions Architect type hota hai.

Isliye title se zyada JD padhna zaroori hai.

Hyderabad Me Solutions Architect Jobs 2026: Demand Kyu Badhegi?#

2026 me Hyderabad me Solutions Architect demand 3 major reasons se strong rehne wali hai.

1. Cloud Migration Abhi Bhi Full Speed Pe Hai

Bohot saari Indian aur global companies abhi bhi legacy systems ko AWS, Azure, GCP pe move kar rahi hain. Banks, insurance, healthcare, retail, logistics, edtech, fintech sabko cloud experts chahiye.

TCS, Infosys, Wipro, Accenture, Cognizant jaise service companies Hyderabad me US aur Europe clients ke cloud transformation projects handle karte hain. In projects me Solutions Architect key role hota hai.

2. AI Aur Data Projects Ke Liye Architecture Chahiye

AI ka hype alag hai, but actual company me AI feature deploy karna easy nahi hota. Data pipelines, model serving, API latency, privacy, compliance, cost, monitoring sab plan karna padta hai.

Agar tum data engineering plus cloud samajhte ho, to 2026 me Solutions Architect roles me tumhari value high hogi.

3. Product Companies Ko Scale Chahiye

Razorpay, PhonePe, Paytm, Swiggy, Zomato type companies ka system daily huge traffic handle karta hai. Hyderabad me inke direct ya partner tech teams cloud, payments, fraud detection, backend systems, observability pe work karte hain.

Scale samajhne wale architects ke liye yahan ₹35 LPA se ₹70 LPA tak packages possible hote hain, experience aur company ke hisaab se.

Hyderabad Me Salary Kitni Milti Hai?#

Salary tumhare experience, cloud skills, domain, communication, aur company type pe depend karti hai.

General range kuch aisa dekh sakte ho:

1. 6 to 8 years experience: ₹18 LPA to ₹32 LPA
2. 8 to 12 years experience: ₹28 LPA to ₹50 LPA
3. 12 to 16 years experience: ₹45 LPA to ₹80 LPA
4. Principal / Enterprise Architect level: ₹70 LPA to ₹1.2 Cr+ in top product, SaaS, fintech, cloud consulting roles

Service companies me salary thodi controlled hoti hai. Example:

1. TCS, Infosys, Wipro, HCLTech, Tech Mahindra: ₹18 LPA to ₹45 LPA for mid-senior architect roles.
2. Accenture, Deloitte, PwC, Capgemini, Cognizant: ₹25 LPA to ₹60 LPA, client-facing cloud role me better.
3. Microsoft, Amazon, Salesforce, ServiceNow, Oracle, Google: ₹45 LPA to ₹1 Cr+ possible, but bar high hota hai.
4. Startups aur product companies: ₹30 LPA to ₹80 LPA, kabhi equity bhi.

Ek honest baat: title “Architect” milne se salary automatically high nahi hoti. Agar resume me sirf “worked on AWS” likha hai to lowball hoga. Agar tum quantify karte ho, “Reduced AWS cost by 28 percent for ₹2 crore annual cloud spend”, to recruiter ka mood change ho jata hai.

2026 Me Kaunsi Skills Sabse Important Rahengi?#

Solutions Architect ke liye “thoda thoda sab kuch” nahi chalega. Tumhe T-shaped skillset chahiye. Matlab ek area me deep, baaki areas me working knowledge.

Must-Have Technical Skills

1. Cloud: AWS, Azure, ya GCP me se at least ek strong.
2. Architecture patterns: Microservices, event-driven architecture, serverless, API gateway, CQRS, caching.
3. Databases: SQL plus NoSQL. PostgreSQL, MySQL, DynamoDB, MongoDB, Cassandra, Redis.
4. Containers: Docker, Kubernetes, Helm basic.
5. DevOps: CI/CD, Jenkins, GitHub Actions, GitLab CI, Terraform.
6. Security: IAM, VPC, encryption, secrets management, OAuth, SSO, compliance basics.
7. Observability: Logs, metrics, tracing, Prometheus, Grafana, CloudWatch, Datadog.
8. Integration: REST APIs, GraphQL, Kafka, RabbitMQ, webhooks.
9. Cost optimization: Cloud cost estimation, reserved instances, autoscaling, storage lifecycle.

Soft Skills Jo Actually Hard Hote Hain

1. Client ko simple language me explain karna.
2. Trade-off clearly batana, “ye option cheap hai but latency high hogi.”
3. Developers ke saath respect se kaam karna.
4. Documentation banana, diagrams, decision records.
5. Conflict handle karna.
6. Requirements clarify karna.
7. Pre-sales calls me confidence se solution pitch karna.

Hyderabad me bohot roles aise milenge jahan architect ko client calls US timings me karni padti hain. Isliye communication skill ignore mat karo.

Fresher Solutions Architect Ban Sakta Hai Kya?#

Direct fresher Solutions Architect banna rare hai. But path clear hai.

Agar tum fresher ho, pehle ye roles target karo:

1. Backend Developer
2. Cloud Engineer
3. DevOps Engineer
4. Site Reliability Engineer
5. Data Engineer
6. QA Automation Engineer with cloud exposure
7. Technical Consultant

3 to 5 years me tum solution design discussions me participate kar sakte ho. 6 to 8 years me Associate Solutions Architect ya Technical Architect roles target karna realistic hota hai.

AWS Certified Solutions Architect Associate certification fresher ke liye helpful hai, but certification alone se job nahi milegi. Projects bhi dikhane padenge.

Best Certifications for Solutions Architect Jobs in Hyderabad 2026#

Certification mandatory nahi hota, but resume shortlist me help karta hai. Especially agar tum service company ya cloud consulting role target kar rahe ho.

AWS Certifications

1. AWS Certified Solutions Architect Associate
2. AWS Certified Solutions Architect Professional
3. AWS Certified DevOps Engineer Professional
4. AWS Security Specialty

AWS India me demand kaafi strong hai, especially TCS, Infosys, Accenture, Deloitte, Cognizant projects me.

Azure Certifications

1. AZ-305: Microsoft Azure Solutions Architect Expert
2. AZ-104: Azure Administrator
3. AZ-204: Azure Developer Associate
4. AZ-500: Azure Security Engineer

Hyderabad me Microsoft ecosystem strong hai, so Azure skills ka value high hai.

GCP Certifications

1. Professional Cloud Architect
2. Professional Data Engineer
3. Professional Cloud DevOps Engineer

GCP roles kam dikhte hain AWS/Azure ke comparison me, but pay achha mil sakta hai, especially data and analytics projects me.

Other Useful Certifications

1. Kubernetes CKA or CKAD
2. TOGAF, agar enterprise architecture target karna hai
3. Terraform Associate
4. Certified Scrum Master, optional but useful
5. ITIL, service management roles ke liye

Certification choose karne ka simple rule: jis company type me apply karna hai, uske JD me jo baar baar aa raha hai, wahi certification lo.

Resume Me Kya Likho Taaki Shortlist Mile?#

Yahan bohot log galti karte hain. Resume me likhte hain:

“Responsible for designing cloud solutions and working with stakeholders.”

Bhai, ye line 5000 resumes me same hoti hai. Recruiter ko impact chahiye.

Better line:

“Designed AWS-based microservices architecture for fintech payment platform handling 1.5M daily transactions, improved API latency from 900ms to 280ms and reduced monthly infra cost by 22 percent.”

Ab baat bani.

Solutions Architect Resume Structure

Resume ko 2 pages me rakho. 12 plus years experience hai to max 3 pages, but crisp.

Use this structure:

1. Name, phone, email, LinkedIn, GitHub if relevant.
2. Title: Solutions Architect | AWS | Microservices | Kubernetes.
3. Summary, 4 to 5 lines.
4. Core skills table.
5. Work experience with impact bullets.
6. Architecture projects.
7. Certifications.
8. Education.
9. Awards, patents, publications if any.

Summary Example

“Solutions Architect with 10 years of experience in designing cloud-native applications on AWS and Azure. Worked on fintech and retail platforms handling 2M plus monthly users. Strong in microservices, Kubernetes, Kafka, API design, cost optimization, and stakeholder communication. Certified AWS Solutions Architect Professional.”

Work Experience Bullet Examples

Use numbers wherever possible:

1. Designed Azure migration plan for 40 plus legacy applications, reducing data center dependency by 60 percent.
2. Built event-driven order processing architecture using Kafka, Spring Boot, and PostgreSQL for 5 lakh daily orders.
3. Reduced AWS monthly spend from ₹42 lakh to ₹31 lakh through autoscaling, S3 lifecycle, and rightsizing.
4. Improved system uptime from 99.2 percent to 99.95 percent by adding multi-AZ deployment and monitoring.
5. Led architecture discussions with 12-member engineering team and US client stakeholders.
6. Created solution proposal worth ₹8 crore for banking modernization project.

Resume Keywords Jo Add Karne Chahiye

JD ke hisaab se keywords add karo, but fake mat karo.

Common keywords:

1. AWS
2. Azure
3. GCP
4. Microservices
5. Kubernetes
6. Docker
7. Terraform
8. Kafka
9. API Gateway
10. Serverless
11. Lambda
12. Event-driven architecture
13. Cloud migration
14. Cost optimization
15. Security architecture
16. High availability
17. Disaster recovery
18. System design
19. Pre-sales
20. Stakeholder management

ATS software pehle resume scan karta hai. Agar keywords missing hain to human recruiter tak resume pahunch hi nahi sakta.

Apply Kaise Kare: Step-by-Step Plan#

Ab main practical process bata raha hoon. Ye follow karoge to random apply se better results milenge.

Step 1: Target Role Clear Karo

Pehle decide karo tum kis type ke Solutions Architect roles target kar rahe ho:

1. Cloud Solutions Architect
2. AWS Solutions Architect
3. Azure Solutions Architect
4. Enterprise Solutions Architect
5. Pre-sales Solutions Architect
6. Data Solutions Architect
7. Security Solutions Architect
8. Application Solutions Architect
9. Integration Architect
10. Technical Architect

Har role ka resume slightly different hona chahiye.

Agar JD AWS heavy hai aur tum Azure summary bhej rahe ho, shortlist chance kam ho jayega.

Step 2: 30 Companies Ki Target List Banao

Hyderabad ke liye ek list banao:

Service and consulting:

1. TCS
2. Infosys
3. Wipro
4. Accenture
5. Deloitte
6. Cognizant
7. Capgemini
8. HCLTech
9. Tech Mahindra
10. LTIMindtree

Product and SaaS:

1. Microsoft
2. Amazon
3. Google
4. Salesforce
5. Oracle
6. ServiceNow
7. Darwinbox
8. HighRadius
9. Zenoti
10. ValueLabs

Fintech, platform, digital:

1. Paytm
2. PhonePe
3. Razorpay
4. Swiggy
5. Zomato
6. Wells Fargo
7. JPMorgan Chase
8. DBS
9. HSBC
10. Synchrony

In companies ke career pages pe weekly check karo. LinkedIn aur Naukri pe alerts set karo.

Step 3: Resume Customize Karo

Ek master resume banao, phir each JD ke liye customize karo.

Customize karne ke liye:

1. JD se 10 important keywords pick karo.
2. Apne resume summary me 4 to 5 relevant keywords add karo.
3. Top 3 work bullets ko JD ke hisaab se reorder karo.
4. Skills section me required cloud tools clearly dikhao.
5. Agar JD pre-sales maang raha hai to proposal, estimation, client workshop bullets add karo.
6. Agar JD hands-on maang raha hai to coding, PoC, Terraform, Kubernetes details add karo.

Step 4: Referral Lo, Cold Apply Pe Depend Mat Karo

Architect roles me referral ka impact high hota hai. Kyunki senior role hai, trust factor important hai.

LinkedIn message template:

“Hi Rahul, I saw an open Solutions Architect role at Infosys Hyderabad focused on AWS migration and microservices. I have 9 years of experience in AWS, Kubernetes, and Java-based architecture, including cost optimization and high-availability systems. If you’re comfortable, could you refer me for this role? I can share the job ID and resume. Thanks.”

Short, polite, direct. Emotional essay mat bhejo.

Step 5: Apply Timing Smart Rakho

Job posting ke first 48 hours me apply karna best hota hai. Senior roles me recruiters early profiles shortlist kar lete hain.

Daily 30 random applications se better hai:

1. 5 high-quality applications per day.
2. 2 referrals per day.
3. 5 recruiter messages per day.
4. 1 resume improvement per week.
5. 2 mock interviews per week.

Interview Process Kaisa Hota Hai?#

Solutions Architect interview usually 4 to 6 rounds ka hota hai.

Round 1: Recruiter Screening

Questions:

1. Current CTC?
2. Expected CTC?
3. Notice period?
4. Hyderabad relocation possible?
5. Cloud experience kitna hai?
6. Client-facing experience hai?
7. Certifications hain?

Expected CTC bolte time market range samajh ke bolo. Agar current ₹24 LPA hai aur tum ₹60 LPA bol rahe ho without product company level proof, recruiter hesitate karega. But ₹35 LPA to ₹42 LPA practical ho sakta hai.

Round 2: Technical Architecture

Yahan depth check hoti hai.

Questions:

1. Design a scalable food delivery system like Swiggy.
2. Design payment processing system like Razorpay.
3. How will you migrate monolith to microservices?
4. AWS VPC design kaise karoge?
5. Kubernetes cluster production ready kaise banega?
6. SQL vs NoSQL kab choose karoge?
7. Kafka use karna hai ya REST API?
8. Disaster recovery plan kaise design karoge?
9. Multi-region architecture kab needed hai?
10. Cost optimization kaise karoge?

Answer me sirf tool name mat bolo. Trade-offs explain karo.

Example: “Kafka use karenge because order events async process ho sakte hain, but payment authorization synchronous rakhna hoga because user ko immediate confirmation chahiye.”

Round 3: System Design Deep Dive

Yahan diagram banana pad sakta hai.

Prepare these systems:

1. E-commerce checkout
2. Food delivery tracking
3. Payment gateway
4. Notification platform
5. Video streaming basics
6. Banking transaction system
7. Ride booking system
8. Inventory management
9. Real-time analytics dashboard
10. Document upload and processing system

Har design me ye cover karo:

1. Requirements
2. Traffic estimate
3. APIs
4. Database schema high level
5. Architecture components
6. Scaling plan
7. Failure scenarios
8. Security
9. Monitoring
10. Cost

Round 4: Managerial / Stakeholder Round

Yahan communication and maturity check hota hai.

Questions:

1. Developer disagrees with your architecture, kya karoge?
2. Client unrealistic timeline de raha hai, kaise handle karoge?
3. Production incident me architect ka role?
4. Build vs buy decision kaise loge?
5. Junior engineers ko kaise mentor karte ho?
6. Non-technical stakeholder ko cloud cost kaise explain karoge?

Answer me ego nahi dikhna chahiye. Architect ka kaam boss banna nahi hai, clarity lana hai.

Round 5: Bar Raiser / Leadership

Product companies me ye round common hai.

They test:

1. Ownership
2. Ambiguity handling
3. Business thinking
4. Long-term architecture vision
5. Past failures
6. Decision making under pressure

Use STAR method:

1. Situation
2. Task
3. Action
4. Result

But robotic mat lagna. Natural bolo.

Portfolio Banane Ka Best Tarika#

Architect role me GitHub optional hai, but architecture portfolio strong signal deta hai.

Create 3 to 5 case studies.

Case Study Ideas

1. Food delivery app architecture: Swiggy/Zomato type.
2. Payment gateway architecture: Razorpay/Paytm type.
3. Cloud migration plan: On-prem to AWS.
4. SaaS HR platform: Darwinbox type multi-tenant app.
5. Real-time notification system: SMS, email, WhatsApp, push.

Har case study me include karo:

1. Problem statement
2. Assumptions
3. Architecture diagram
4. Tech stack
5. Database choice
6. Security design
7. Scaling approach
8. Cost estimate
9. Failure handling
10. Trade-offs

Agar real client details confidential hain, anonymize kar do. “Large fintech client” likh sakte ho.

LinkedIn Profile Kaise Optimize Kare#

Senior roles me recruiter LinkedIn zaroor dekhta hai.

Headline Examples

1. Solutions Architect | AWS | Kubernetes | Microservices | Fintech Platforms
2. Cloud Solutions Architect | Azure | Migration | Security | Cost Optimization
3. Technical Architect | Java | Kafka | AWS | High-Scale Distributed Systems

About Section Example

“Hi, I’m a Solutions Architect with 9 plus years of experience designing cloud-native platforms on AWS and Azure. I’ve worked on microservices, event-driven systems, Kubernetes, API platforms, and cloud cost optimization. My recent work includes designing high-availability systems for fintech and retail platforms handling millions of transactions. I enjoy converting messy business requirements into clear technical designs.”

Featured Section Me Kya Add Kare

1. Architecture case study PDF
2. Certification badge
3. Blog post on system design
4. GitHub repo
5. Slide deck from tech talk

Common Mistakes Jo Job Search Kharab Karte Hain#

Mistake 1: Same Resume Sab Jagah Bhejna

Architect roles specialized hote hain. AWS role ke liye AWS-heavy resume bhejo. Azure role ke liye Azure projects upar lao.

Mistake 2: Sirf Tools List Karna

“Docker, Kubernetes, AWS” likhna enough nahi hai. Batana padega tumne unse kya impact create kiya.

Mistake 3: Coding Completely Ignore Karna

Solutions Architect ko daily coding nahi karni padti, but hands-on credibility zaroor chahiye. At least PoC level coding, Terraform, API design, debugging samajhna chahiye.

Mistake 4: Business Context Nahi Samajhna

Architecture ka matlab shiny tech choose karna nahi hai. Agar client ka budget ₹20 lakh hai to ₹2 crore ka setup suggest karna immature lagega.

Mistake 5: Interview Me Buzzwords Bolna

“Scalable, secure, cloud-native” bolne se kuch nahi hota. Kaise scalable? Kaise secure? Kitna traffic? Kitna cost? Ye explain karo.

30-Day Action Plan for Hyderabad Job Seekers#

Agar tum serious ho, ye 30-day plan follow karo.

Week 1: Profile Fix

1. Resume update karo.
2. LinkedIn headline and About section improve karo.
3. 30 target companies list banao.
4. 3 job descriptions analyze karo.
5. ATS-friendly resume format banao.

Week 2: Skill Gap Close

1. AWS/Azure weak areas revise karo.
2. 3 system design problems solve karo.
3. One architecture case study prepare karo.
4. Kubernetes and Terraform basics revise karo.
5. Cost optimization examples ready karo.

Week 3: Applications and Referrals

1. 25 quality applications bhejo.
2. 10 referrals request karo.
3. 15 recruiters ko message karo.
4. 2 mock interviews do.
5. Resume keywords improve karo based on JD.

Week 4: Interview Mode

1. STAR stories prepare karo.
2. Salary negotiation numbers decide karo.
3. Current project ka architecture explain karne ka 5-minute version practice karo.
4. 5 system design diagrams practice karo.
5. Follow-up messages send karo.

Salary Negotiation Tips#

Senior roles me negotiation important hai. Jo pehle number bolta hai, kabhi kabhi disadvantage me hota hai.

Recruiter pooche expected CTC, to bolo:

“Based on my experience in AWS architecture, microservices, and client-facing solution design, I’m targeting roles in the ₹42 LPA to ₹48 LPA range, but I’m open depending on role scope, benefits, and growth.”

Agar current CTC ₹28 LPA hai, ₹42 LPA reasonable ask ho sakta hai. Agar product company hai and interview strong gaya, ₹50 LPA bhi possible.

Don’t Say This

1. “Anything is fine.”
2. “Mujhe bas job chahiye.”
3. “Market me sab ₹60 LPA de rahe hain.”
4. “Mera friend itna le raha hai.”

Say This Instead

1. “I’m looking for fair market compensation based on role scope.”
2. “My strength is cloud architecture and cost optimization, so I’m targeting senior architect-level compensation.”
3. “I’m flexible if the role has strong ownership and growth.”

Hyderabad Location Advantage Kaise Use Kare#

Hyderabad me Gachibowli, HITEC City, Financial District, Madhapur, Kondapur, Nanakramguda me major tech offices hain. Hybrid roles kaafi common hain.

Agar tum Hyderabad me already ho, resume summary ya recruiter call me mention kar sakte ho:

“Currently based in Hyderabad and available for hybrid roles in Gachibowli / HITEC City / Financial District.”

Relocation barrier kam ho jata hai. Recruiter ko lagta hai joining smoother hogi.

Final Checklist Before Apply#

Apply button dabane se pehle ye checklist dekh lo:

1. Resume me role title JD ke close hai?
2. Summary me cloud platform mentioned hai?
3. Skills section ATS-friendly hai?
4. Recent projects me measurable impact hai?
5. Architecture keywords included hain?
6. Certifications visible hain?
7. LinkedIn profile updated hai?
8. Resume file name professional hai?
9. Referral try kiya?
10. JD ke top 5 requirements resume me dikh rahe hain?

File name aisa rakho:

Rahul_Sharma_Solutions_Architect_AWS_Hyderabad.pdf

Not this:

final_resume_new_latest_2.pdf

Conclusion: 2026 Me Chance Strong Hai, Bas Strategy Chahiye#

Solutions Architect jobs in Hyderabad 2026 ke liye demand real hai. Cloud migration, AI platforms, fintech scale, SaaS products, banking modernization, sab jagah architects chahiye.

But competition bhi serious hai. Sirf experience years se job nahi milegi. Tumhe prove karna padega ki tum business problem samajh ke practical, secure, scalable, cost-aware solution design kar sakte ho.

Aaj se random apply band karo. Target companies choose karo, resume customize karo, referrals lo, system design practice karo, aur apne impact numbers clearly dikhao.

Aur sabse important: resume ATS me pass hona chahiye. Agar bot ne reject kar diya to recruiter tumhara talent dekh hi nahi payega.

Apna resume free me check karna hai? JobRise ka ATS checker use karo: Free ATS Resume Checker